JP2022123087A - Axially movable closure system mechanism for applying closure motions to jaws of surgical instruments - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a surgical tool assembly.

SOLUTION: A surgical tool assembly comprises a first jaw and a second jaw that is movably supported on the first jaw for selective movement relative to the first jaw between an open position and a closed position around a fixed pivot axis. The second jaw includes a proximal cam surface oriented at a first cam angle relative to an outer surface of the second jaw, and a distal cam surface oriented at a second cam angle relative to the outer surface of the second jaw, where the first cam angle is steeper than the second cam angle. The surgical tool assembly further includes a shaft assembly that defines a shaft axis. The shaft assembly includes an axially movable closure member, the axially movable closure member including a distal end surface, and a distal camming surface.

SELECTED DRAWING: Figure 18A

COPYRIGHT: (C)2022,JPO&INPIT

Description

The present invention relates to surgical instruments and to surgical stapling and severing instruments and staple cartridges for use therewith designed for stapling and severing tissue in a variety of situations.

Various features of the embodiments described herein, together with their advantages, can be understood by the following description in conjunction with the accompanying drawings below.
FIG. 12 is a perspective view of an embodiment of a replaceable surgical tool assembly operably coupled to an embodiment of a handle assembly; 2 is an exploded view of a portion of the handle assembly and replaceable surgical tool assembly of FIG. 1; FIG. 3 is a perspective view of the embodiment of the replaceable surgical tool assembly shown in FIGS. 1 and 2, with portions thereof omitted for clarity; FIG. 4 is a perspective view of a proximal portion of the embodiment of the replaceable surgical tool assembly shown in FIGS. 1-3, with portions thereof omitted for clarity; FIG. 5 is an exploded view of the proximal portion of the replaceable surgical tool assembly of FIGS. 1-4; FIG. 6 is an exploded view of the distal portion of the replaceable surgical tool assembly of FIGS. 1-5; FIG. FIG. 11 illustrates use of an embodiment of an interchangeable surgical tool assembly to perform a medical procedure known as a human pelvic inferior anterior resection; FIG. 8 is a top view of a portion of the replaceable surgical tool assembly shown in FIG. 7; FIG. 9 is another top view of the replaceable surgical tool assembly shown in FIG. 8, a portion of which is shown in cross-section; FIG. 10 is a partial perspective view of the distal portion of the replaceable surgical tool assembly of FIG. 9; FIG. 11 is a cross-sectional view of the replaceable surgical tool assembly of FIG. 10 taken along line 11-11 of FIG. 10; FIG. FIG. 12 is a partial perspective view of a portion of another replaceable surgical tool assembly; FIG. 4 is a cross-sectional end view of a shaft assembly portion of another interchangeable surgical tool embodiment; FIG. 4 is a cross-sectional end view of a shaft assembly portion of another interchangeable surgical tool embodiment; FIG. 12A is a top cross-sectional view of a portion of an embodiment of an interchangeable surgical tool in an articulated configuration; FIG. 12B is a top view of another surgical end effector and a portion of the elongated shaft assembly mechanism with the surgical end effector in a non-articulated position (solid lines) and an articulated position (phantom lines); FIG. 14 is a perspective view of a portion of an end effector of an interchangeable surgical tool using an anvil cap to cover a portion of a firing member parking area within the end effector; 17 is another perspective view of a portion of the surgical end effector of FIG. 16 with the anvil cap omitted for clarity; FIG. 17 is a side view of the surgical end effector of FIG. 16 with its anvil in an open configuration; FIG. 19 is a cross-sectional side view of the surgical end effector of FIG. 18; FIG. 19 is a cross-sectional side view of the surgical end effector of FIG. 18 during initiation of the anvil closure process; FIG. 20 is another cross-sectional side view of the surgical end effector of FIGS. 18 and 19 with its anvil in a fully closed position; FIG. 21 is another cross-sectional side view of the surgical end effector of FIG. 20 after its firing member has advanced distally from the firing member parking area; FIG. [0014] Fig. 4A is a perspective view of an embodiment of a distal closure member; 22 is a side view of a portion of an interchangeable surgical tool assembly using the distal closure member of FIG. 21 with the anvil of the surgical end effector portion in a fully closed position; FIG. 23 is another side view of a portion of the replaceable surgical tool assembly of FIG. 22 with the distal closure member in the initial open position; FIG. 23 is another side view of a portion of the replaceable surgical tool assembly of FIG. 22 with the distal closure member in another open position; FIG. 23 is another side view of a portion of the replaceable surgical tool assembly of FIG. 22 with the anvil in the fully open position; FIG. FIG. 10 is a perspective view of another distal closure member embodiment; FIG. 10 is a side view of another anvil embodiment; 28 is a partial cross-sectional side view of another replaceable surgical tool assembly employing the distal closure member of FIG. 26 and the anvil embodiment of FIG. 27, with the anvil in a fully closed position; FIG. 29 is another partial cross-sectional side view of the replaceable surgical tool assembly of FIG. 28 with the anvil in the fully open position; FIG. FIG. 10 is a perspective view of another distal closure member embodiment; 31 is a partial cross-sectional side view of another replaceable surgical tool assembly employing the distal closure member embodiment of FIG. 30 with its anvil in a fully open position; FIG. FIG. 12 is a partial cross-sectional side view of another interchangeable surgical tool assembly with the anvil in a fully closed position; 33 is another partial cross-sectional side view of the replaceable surgical tool assembly of FIG. 32 with the anvil in the fully open position; FIG. FIG. 13 is a side view of a portion of another interchangeable surgical tool assembly with the anvil in a fully closed position; 35 is another side view of a portion of the replaceable surgical tool assembly of FIG. 34 with the anvil in the fully open position; FIG. FIG. 13 is a side view of a portion of another interchangeable surgical tool assembly with the anvil in a fully closed position; 37 is another side view of a portion of the replaceable surgical tool assembly of FIG. 36 with the anvil in a partially open position; FIG. FIG. 13 is a side view of a portion of another interchangeable surgical tool assembly with the anvil in a fully closed position; 39 is another side view of a portion of the replaceable surgical tool assembly of FIG. 38 with the anvil in a partially open position; FIG. FIG. 11 is a bottom perspective view of an embodiment of a camming or sled assembly; FIG. 12 is a top view of a portion of an embodiment of a surgical end effector with an unfired surgical staple cartridge installed therein, with its camming assembly in the starting position and in unlocked engagement with the firing member locking member; be. The surgical end of FIG. 41 having an improperly unfired surgical staple cartridge mounted therein, with its camming assembly in the start position and the firing member lock in locking engagement with the firing member. FIG. 12A is a top view of a portion of an effector embodiment; FIG. 12 is an exploded perspective view of a portion of an anvil, firing member, sled assembly, and firing member lock embodiment of another replaceable surgical tool assembly embodiment; 44 is a partial cross-sectional view of the distal portion of the replaceable surgical tool assembly of FIG. 43 with the firing member omitted for clarity; FIG. 45 of the distal portion of the replaceable surgical tool assembly of FIG. 44 with an unfired surgical staple cartridge properly seated within the surgical end effector, the anvil in the open position, and the firing member in the starting position; FIG. 11 is another partial cross-sectional view; 46 is another partial cross-sectional view of the distal portion of the replaceable surgical tool assembly of FIG. 45 with the anvil in the fully closed position and the firing member in the initial firing position; FIG. 46 is another partial cross-sectional view of the distal portion of the replaceable surgical tool assembly of FIG. 45 with the anvil in the fully closed position and the firing member advanced further distally within the surgical end effector; FIG. 48 is another partial cross-sectional view of the distal portion of the replaceable surgical tool assembly of FIG. 47 with the anvil in the fully closed position and the firing member retracted back to the starting position just prior to contacting the firing member lock; FIG. be. 49 is another partial cross-section of the distal portion of the replaceable surgical tool assembly of FIG. 48 with the anvil in the fully closed position and the firing member retracted back to the start position after initial contact with the firing member lock; FIG. It is a diagram. 50 is another partial cross-sectional view of the distal portion of the replaceable surgical tool assembly of FIG. 49 with the anvil in the fully closed position and the firing member retracted back to the starting position; FIG. FIG. 12 is a side cross-sectional view of a portion of another replaceable surgical tool assembly embodiment with an unfired surgical staple cartridge loaded within a surgical end effector and a firing member in a starting position or configuration; 52 is another cross-sectional side view of the embodiment of the replaceable surgical tool assembly of FIG. 51 after the firing member has begun distal advancement through the surgical end effector; FIG. 53 is another cross-sectional side view of the embodiment of the replaceable surgical tool assembly of FIGS. 51 and 52 during retraction of the firing member back to the starting position; FIG. 54 is another cross-sectional side view of the embodiment of the replaceable surgical tool assembly of FIGS. 51-53 after the firing member has been further retracted toward the starting position; FIG. 55 is another cross-sectional side view of the embodiment of the replaceable surgical tool assembly of FIGS. 51-54 after the firing member has been fully retracted back to the starting position; FIG. FIG. 12 is an exploded perspective view of a portion of the firing member, sled assembly, firing member, and firing member locking member of another replaceable surgical tool assembly embodiment; Implementation of the replaceable surgical tool assembly of FIG. 56 with the anvil of the surgical end effector in the open position prior to installing an unfired surgical staple cartridge within the surgical end effector and the firing member in the starting position FIG. 10 is a side cross-sectional view of a portion of the configuration; FIG. 58 is another cross-sectional side view of a portion of the replaceable surgical tool assembly embodiment of FIG. 57 with an unfired surgical staple cartridge installed in the surgical end effector and the anvil in the closed position; 59 is a top cross-sectional view of a portion of the replaceable surgical tool assembly embodiment of FIG. 58 with the firing member lock in a disengaged configuration relative to the firing member; FIG. 60 is another cross-sectional side view of a portion of the replaceable surgical tool assembly embodiment of FIGS. 58 and 59 after initial distal advancement of the firing member; FIG. 61 is another cross-sectional side view of a portion of the embodiment of the replaceable surgical tool assembly of FIGS. 58-60 during retraction back to the starting position; FIG. 62 is a top view of a portion of the replaceable surgical tool assembly embodiment of FIG. 61; FIG. 58-62 after the firing member has been fully retracted back to the starting position and in locking engagement with the firing member lock; FIG. It is a sectional side view. FIG. 12 is an exploded perspective view of a portion of an embodiment of an articulation joint and an articulation lock of another interchangeable surgical tool assembly embodiment; 65 is a perspective view of an embodiment of a lock spring assembly of the articulation lock embodiment of FIG. 64; FIG. 65 is a top view of an embodiment of an end effector mounting assembly of the embodiment of the replaceable surgical tool assembly of FIG. 64; FIG. 65 is a top view of a portion of the replaceable surgical tool assembly embodiment of FIG. 64 with the surgical end effector in a non-articulated configuration; FIG. 68 is another top view of a portion of the replaceable surgical tool assembly embodiment of FIG. 67 during the initial application of articulation to the articulation joint; FIG. 69 is a bottom view of a portion of the replaceable surgical tool assembly embodiment of FIG. 68; FIG. FIG. 70 is another bottom view of a portion of the replaceable surgical tool assembly embodiment of FIG. 69 with the surgical end effector in an articulated configuration; FIG. 12 is an exploded perspective view of a portion of an embodiment of an articulation joint and an articulation lock of another interchangeable surgical tool assembly embodiment; 72 is a top view of an embodiment of an end effector mounting assembly of the embodiment of the replaceable surgical tool assembly of FIG. 71; FIG. 72 is a top view of a portion of the replaceable surgical tool assembly embodiment of FIG. 71 with the surgical end effector in a non-articulated configuration; FIG. 74 is a partial cross-sectional view of a portion of the articulation lock embodiment of FIG. 73 taken along line 74-74 of FIG. 73; FIG. 74 is another top view of a portion of the replaceable surgical tool assembly embodiment of FIG. 73 during the initial application of articulation to the articulation joint; FIG. 76 is another top view of a portion of the replaceable surgical tool assembly embodiment of FIG. 75 with the surgical end effector in the articulated configuration and the articulation lock in the unlocked configuration; FIG. 76 is another top view of a portion of the replaceable surgical tool assembly embodiment of FIG. 75 with the surgical end effector in the articulated configuration and the articulation lock in the locked configuration; FIG. FIG. 12 is an exploded perspective view of a portion of an embodiment of an articulation joint and an articulation lock of another interchangeable surgical tool assembly embodiment; 79 is a top view of a portion of the replaceable surgical tool assembly embodiment of FIG. 78 with the surgical end effector in a non-articulated configuration; FIG. 80 is a side cross-sectional view of a portion of the replaceable surgical tool assembly of FIG. 79 taken along line 80-80 of FIG. 79; FIG. 81 is another cross-sectional side view of a portion of the interchangeable surgical tool assembly of FIG. 80 during initial application of articulation to the articulation lock; FIG. 82 is another cross-sectional side view of a portion of the replaceable surgical tool assembly of FIG. 81 with the articulation joint locked in place by the articulation lock; FIG. FIG. 13 is an exploded perspective view of a portion of a spine assembly, articulation joint, and articulation lock embodiment of another replaceable surgical tool assembly embodiment; 84 is a top view of the distal end of the spine assembly and a portion of the articulation locking mechanism of the embodiment of the replaceable surgical tool assembly of FIG. 83; FIG. FIG. 13 is an exploded perspective view of a portion of a spine assembly, articulation joint, and articulation lock embodiment of another replaceable surgical tool assembly embodiment; 86 is another exploded perspective view of a portion of the spine assembly and articulation joint and articulation lock of the replaceable surgical tool assembly of FIG. 85; FIG. 86 is a top cross-sectional view of the replaceable surgical tool assembly of FIG. 85 with the surgical end effector in a non-articulated configuration; FIG. FIG. 88 is another top cross-sectional view of the replaceable surgical tool assembly of FIG. 87 with the surgical end effector in an articulated configuration and the articulation lock in an unlocked configuration; FIG. 89 is another top cross-sectional view of the interchangeable surgical tool assembly of FIG. 88 with the surgical end effector in the articulated configuration and the articulation lock in the locked configuration; FIG. 13 is an exploded perspective view of a portion of a spine assembly, articulation joint, and articulation lock embodiment of another replaceable surgical tool assembly embodiment; 91 is a top cross-sectional view of the interchangeable surgical tool assembly of FIG. 90 with the surgical end effector in a non-articulated configuration; FIG. 92 is another top cross-sectional view of the replaceable surgical tool assembly of FIG. 91 with the surgical end effector in an articulated configuration and the articulation lock in an unlocked configuration; FIG. 93 is a partial cross-sectional view of the articulation lock of FIG. 92 taken along line 93-93 of FIG. 92; FIG. 92 is another top cross-sectional view of the replaceable surgical tool assembly of FIG. 91 with the surgical end effector in an articulated configuration and the articulation lock in a locked configuration; FIG. 95 is a partial cross-sectional view of the articulation lock of FIG. 94 taken along line 95-95 of FIG. 94; FIG. FIG. 12 is a perspective view of a portion of an embodiment of an articulation stroke amplifier; 97 is a cross-sectional end view of a shaft assembly of an embodiment of an interchangeable surgical tool assembly with the articulation stroke amplifier of FIG. 96 therein; FIG. 97 is a top view of a portion of the articulation stroke amplifier embodiment of FIG. 96 in an unactuated configuration; FIG. 98B is another top view of a portion of the articulation stroke amplifier of FIG. 98A after axial articulation has been applied in the first axis; FIG. 98B is another top view of a portion of the articulation stroke amplifier of FIG. 98A after another axial articulation is applied in the second axis; FIG. FIG. 12 is a top cross-sectional view of a portion of a shaft assembly of an embodiment of an interchangeable surgical tool assembly including another articulation stroke amplifier embodiment in an unactuated configuration; 99B is another top cross-sectional view of the shaft assembly and articulation stroke amplifier of FIG. 99A after axial articulation has been applied in the first axis; FIG. FIG. 10 is a top cross-sectional view of a portion of a shaft assembly of another interchangeable surgical tool assembly embodiment including another articulation stroke amplifier embodiment in an unactuated configuration; 99D is another top cross-sectional view of the shaft assembly and articulation stroke amplifier of FIG. 99C after axial articulation in the first axis direction has been applied; FIG. FIG. 12 is an exploded perspective view of a channel and staple cartridge; 101 is an elevational view of the channel and staple cartridge of FIG. 100; FIG. 101 is a cross-sectional elevational view of the channel and staple cartridge of FIG. 100 taken across the plane shown in FIG. 101; FIG. FIG. 12 is an exploded perspective view of a channel and staple cartridge; 104 is an elevational view of the staple cartridge of FIG. 103; FIG. 104 is a cross-sectional elevational view of the channel and staple cartridge of FIG. 103 taken across the plane shown in FIG. 104; FIG. FIG. 12 is an exploded elevational view of the channel and staple cartridge; 107 is an elevational view of the channel and staple cartridge of FIG. 106 showing the staple cartridge installed completely within the channel; FIG. FIG. 12 is an exploded elevational view of the channel and staple cartridge; 109 is an elevational view of the channel and staple cartridge of FIG. 108 showing the staple cartridge installed completely within the channel; FIG. 109 is an elevational view of the staple cartridge of FIG. 106 and the channel of FIG. 108 showing the staple cartridge incompletely installed within the channel; FIG. 1 is a perspective view of a portion of a staple cartridge; FIG. 1 is a perspective view of a portion of a staple cartridge; FIG. Fig. 10 is a perspective view of an end effector; Fig. 2 shows a table of identifications for various types of end effectors; Fig. 2 shows a table of identifications for various types of end effectors;

Corresponding reference characters indicate corresponding parts throughout the drawings. The exemplifications set forth herein are illustrative of various embodiments of the invention in one form and such exemplifications should not be construed as limiting the scope of the invention in any way. do not have.

The applicant of this application owns the following U.S. patent applications filed December 21, 2016, the entire contents of which are each incorporated herein by reference:
- US patent application Ser. No. 15/386,185 entitled "SURGICAL STAPLING INSTRUMENTS AND REPLACEABLE TOOL ASSEMBLIES THEREOF";
- US patent application Ser. No. 15/386,221, entitled "LOCKOUT ARRANGEMENTS FOR SURGICAL END EFFECTORS",
- US patent application Ser. No. 15/386,209, entitled "SURGICAL END EFFECTORS AND FIRING MEMBERS THEREOF",
- US patent application Ser. No. 15/386,198, entitled "LOCKOUT ARRANGEMENTS FOR SURGICAL END EFFECTORS AND REPLACEABLE TOOL ASSEMBLIES"; FIRING MEMBERS THEREFOR'.

The applicant of this application owns the following U.S. patent applications filed December 21, 2016, the entire contents of which are each incorporated herein by reference:
- U.S. patent application Ser.
－米国特許出願第１５／３８５，９４１号、発明の名称「ＳＵＲＧＩＣＡＬ ＴＯＯＬ ＡＳＳＥＭＢＬＩＥＳ ＷＩＴＨ ＣＬＵＴＣＨＩＮＧ ＡＲＲＡＮＧＥＭＥＮＴＳ ＦＯＲ ＳＨＩＦＴＩＮＧ ＢＥＴＷＥＥＮ ＣＬＯＳＵＲＥ ＳＹＳＴＥＭＳ ＷＩＴＨ ＣＬＯＳＵＲＥ ＳＴＲＯＫＥ ＲＥＤＵＣＴＩＯＮ ＦＥＡＴＵＲＥＳ ＡＮＤ ＡＲＴＩＣＵＬＡＴＩＯＮ ＡＮＤ ＦＩＲＩＮＧ ＳＹＳＴＥＭＳ」、
- US Patent Application No. 15/385,943, entitled "SURGICAL STAPLING INSTRUMENTS AND STAPLE-FORMING ANVILS",
- U.S. patent application Ser.
- U.S. patent application Ser.
- US Patent Application No. 15/385,946, entitled "SURGICAL STAPLING INSTRUMENTS AND STAPLE-FORMING ANVILS",
- US patent application Ser. No. 15/385,951 entitled "SURGICAL INSTRUMENTS WITH JAW OPENING FEATURES FOR INCREASING A JAW OPENING DISTANCE"
- US patent application Ser. No. 15/385,953, entitled "METHODS OF STAPLING TISSUE",
- U.S. patent application Ser.
- US patent application Ser. No. 15/385,955, entitled "SURGICAL END EFFECTORS WITH EXPANDABLE TISSUE STOP ARRANGEMENTS",
- US Patent Application No. 15/385,948, entitled "SURGICAL STAPLING INSTRUMENTS AND STAPLE-FORMING ANVILS",
- US patent application Ser. No. 15/385,956, entitled "SURGICAL INSTRUMENTS WITH POSITIVE JAW OPENING FEATURES",
- U.S. patent application Ser. Name "STAPLE CARTRIDGES AND ARRANGEMENTS OF STAPLES AND STAPLE CAVITIES THEREIN".

The applicant of this application owns the following U.S. patent applications filed December 21, 2016, the entire contents of which are each incorporated herein by reference:
- US patent application Ser. No. 15/385,896, entitled "METHOD FOR RESETTING A FUSE OF A SURGICAL INSTRUMENT SHAFT",
- US patent application Ser. No. 15/385,898 entitled "STAPLE FORMING POCKET ARRANGEMENT TO ACCOMMODATE DIFFERENT TYPES OF STAPLES"
- US patent application Ser. No. 15/385,899 entitled "SURGICAL INSTRUMENT COMPRISING IMPROVED JAW CONTROL";
- U.S. patent application Ser.
- US patent application Ser. No. 15/385,902, entitled "SURGICAL INSTRUMENT COMPRISING A CUTTING MEMBER",
- U.S. patent application Ser.
- US patent application Ser. No. 15/385,905, entitled "FIRING ASSEMBLY COMPRISING A LOCKOUT",
- U.S. patent application Ser.
- US patent application Ser. No. 15/385,908, entitled "FIRING ASSEMBLY COMPRISING A FUSE"; and - US patent application Ser. .

The applicant of this application owns the following U.S. patent applications filed December 21, 2016, the entire contents of which are each incorporated herein by reference:
- US patent application Ser. No. 15/385,920, entitled "STAPLE FORMING POCKET ARRANGEMENTS",
- US patent application Ser. No. 15/385,913, entitled "ANVIL ARRANGEMENTS FOR SURGICAL STAPLERS",
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- US patent application Ser. No. 15/385,927 entitled "SURGICAL STAPLING INSTRUMENTS WITH SMART STAPLE CARTRIDGES",
- US patent application Ser. No. 15/385,917 entitled "STAPLE CARTRIDGE COMPRISING STAPLES WITH DIFFERENT CLAMPING BREADTHS"
- U.S. patent application Ser.
- US Patent Application No. 15/385,931, entitled "NO-CARTRIDGE AND SPENT CARTRIDGE LOCKOUT ARRANGEMENTS FOR SURGICAL STAPLERS",
- US patent application Ser. No. 15/385,915, entitled "FIRING MEMBER PIN ANGLE",
- U.S. patent application Ser.
- US patent application Ser. No. 15/385,922, entitled "SURGICAL INSTRUMENT WITH MULTIPLE FAILURE RESPONSE MODES",
- US patent application Ser. No. 15/385,924, entitled "SURGICAL INSTRUMENT WITH PRIMARY AND SAFETY PROCESSORS",
- U.S. patent application Ser.
- US patent application Ser. No. 15/385,910, entitled "ANVIL HAVING A KNIFE SLOT WIDTH",
- US patent application Ser. No. 15/385,903, entitled "CLOSURE MEMBER ARRANGEMENTS FOR SURGICAL INSTRUMENTS"; and - US patent application Ser. No. 15/385,906, entitled "FIRING MEMBER PIN CONFIGURATIONS."

The applicant of this application owns the following U.S. patent applications filed December 21, 2016, the entire contents of which are each incorporated herein by reference:
- U.S. patent application Ser.
- US patent application Ser. No. 15/386,192, entitled "STEPPED STAPLE CARTRIDGE WITH TISSUE RETENTION AND GAP SETTING FEATURES"
- US Patent Application No. 15,386,206, entitled "STAPLE CARTRIDGE WITH DEFORMABLE DRIVER RETENTION FEATURES",
- U.S. patent application Ser.
- U.S. patent application Ser. UNITS FOR SURGICAL STAPLING INSTRUMENTS".

The applicant of this application owns the following U.S. patent applications filed December 21, 2016, the entire contents of which are each incorporated herein by reference:
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- US patent application Ser. No. 15/385,894, entitled "SHAFT ASSEMBLY COMPRISING A LOCKOUT"; and - US patent application Ser.

The applicant of this application owns the following U.S. patent applications filed December 21, 2016, the entire contents of which are each incorporated herein by reference:
- US patent application Ser. No. 15/385,916, entitled "SURGICAL STAPLING SYSTEMS"
- US patent application Ser. No. 15/385,918, entitled "SURGICAL STAPLING SYSTEMS"
- US patent application Ser. No. 15/385,919, entitled "SURGICAL STAPLING SYSTEMS"
- U.S. patent application Ser.
- US patent application Ser. No. 15/385,923, entitled "SURGICAL STAPLING SYSTEMS"
－米国特許出願第１５／３８５，９２５号、発明の名称「ＪＡＷ ＡＣＴＵＡＴＥＤ ＬＯＣＫ ＡＲＲＡＮＧＥＭＥＮＴＳ ＦＯＲ ＰＲＥＶＥＮＴＩＮＧ ＡＤＶＡＮＣＥＭＥＮＴ ＯＦ Ａ ＦＩＲＩＮＧ ＭＥＭＢＥＲ ＩＮ Ａ ＳＵＲＧＩＣＡＬ ＥＮＤ ＥＦＦＥＣＴＯＲ ＵＮＬＥＳＳ ＡＮ ＵＮＦＩＲＥＤ ＣＡＲＴＲＩＤＧＥ ＩＳ ＩＮＳＴＡＬＬＥＤ ＩＮ ＴＨＥ ＥＮＤ ＥＦＦＥＣＴＯＲ」、
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser. The name "ARTICULATABLE SURGICAL INSTRUMENTS WITH ARTICULATION STROKE AMPLIFICATION FEATURES".

The applicant of this application owns the following U.S. patent applications filed June 24, 2016, the entire contents of which are each incorporated herein by reference:
- US patent application Ser. No. 15/191,775, entitled "STAPLE CARTRIDGE COMPRISING WIRE STAPLES AND STAMPED STAPLES"
- US patent application Ser. No. 15/191,807, entitled "STAPLING SYSTEM FOR USE WITH WIRE STAPLES AND STAMPED STAPLES,"
- U.S. patent application Ser.
- US patent application Ser. No. 15/191,788, entitled "STAPLE CARTRIDGE COMPRISING OVERDRIVEN STAPLES," and - US patent application Ser.

The applicant of this application owns the following U.S. patent applications filed June 24, 2016, the entire contents of which are each incorporated herein by reference:
- US Design Patent Application No. 29/569,218, entitled "SURGICAL FASTENER";
- US Design Patent Application No. 29/569,227, entitled "SURGICAL FASTENER";
- US Design Patent Application No. 29/569,259, entitled "SURGICAL FASTENER CARTRIDGE," and - US Design Patent Application No. 29/569,264, entitled "SURGICAL FASTENER CARTRIDGE."

The applicant of this application owns the following patent applications filed on April 1, 2016, the entire contents of which are each incorporated herein by reference:
- US Patent Application No. 15/089,325, entitled "METHOD FOR OPERATING A SURGICAL STAPLING SYSTEM",
- US patent application Ser.
- U.S. patent application Ser.
- US patent application Ser. No. 15/089,263, entitled "SURGICAL INSTRUMENT HANDLE ASSEMBLY WITH RECONFIGURABLE GRIP PORTION",
- US patent application Ser.
- US patent application Ser.
- U.S. patent application Ser.
- US patent application Ser.
- U.S. patent application Ser.
- US patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- US patent application Ser.
- US Patent Application No. 15/089,203, entitled "SURGICAL STAPLING SYSTEM COMPRISING A JAW ATTACHMENT LOCKOUT",
- U.S. patent application Ser.
- US Patent Application No. 15/089,324, entitled "SURGICAL INSTRUMENT COMPRISING A SHIFTING MECHANISM",
- U.S. patent application Ser.
- US patent application Ser. No. 15/089,339, entitled "SURGICAL STAPLING INSTRUMENT",
- U.S. patent application Ser.
- U.S. patent application Ser.
- US patent application Ser. No. 15/089,331, entitled "ANVIL MODIFICATION MEMBERS FOR SURGICAL STAPLERS",
- US Patent Application No. 15/089,336, entitled "STAPLE CARTRIDGES WITH ATRAUMATIC FEATURES",
- U.S. patent application Ser.
- US patent application Ser. No. 15/089,309, entitled "CIRCULAR STAPLING SYSTEM COMPRISING ROTARY FIRING SYSTEM," and - US patent application Ser.

The applicant of this application also owns the following identified U.S. patent applications filed December 31, 2015, the entire contents of which are each incorporated herein by reference:
- U.S. patent application Ser.
- U.S. patent application Ser. AND MOTOR CONTROL CIRCUITS'.

The applicant of this application also owns the following identified U.S. patent applications filed on February 9, 2016, the entire contents of which are each incorporated herein by reference:
- U.S. patent application Ser.
- U.S. patent application Ser.
- US patent application Ser. No. 15/019,196 entitled "SURGICAL INSTRUMENT ARTICULATION MECHANISM WITH SLOTTED SECONDARY CONSTRAINT";
- U.S. patent application Ser.
- US patent application Ser.
- U.S. patent application Ser.
- US Patent Application No. 15/019,235, entitled "SURGICAL INSTRUMENTS WITH TENSIONING ARRANGEMENTS FOR CABLE DRIVEN ARTICULATION SYSTEMS",
- US patent application Ser. No. 15/019,230, entitled "ARTICULATABLE SURGICAL INSTRUMENTS WITH OFF-AXIS FIRING BEAM ARRANGEMENTS"; REDUCTION ARRANGEMENTS".

The applicant of this application also owns the following identified U.S. patent applications filed on February 12, 2016, the entire contents of which are each incorporated herein by reference:
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser. FAILURE IN POWERED SURGICAL INSTRUMENTS".

The applicant of the present application owns the following patent applications filed June 18, 2015, the entire contents of which are each incorporated herein by reference:
- US patent application Ser. No. 14/742,925, entitled "SURGICAL END EFFECTORS WITH POSITIVE JAW OPENING ARRANGEMENTS",
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- US patent application Ser. No. 14/742,885, entitled "DUAL ARTICULATION DRIVE SYSTEM ARRANGEMENTS FOR ARTICULATABLE SURGICAL INSTRUMENTS"; SURGICAL INSTRUMENTS".

The applicant of this application owns the following patent applications filed March 6, 2015, the entire contents of which are each incorporated herein by reference:
- US patent application Ser. No. 14/640,746, entitled "POWERED SURGICAL INSTRUMENT", now US patent application publication no.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- US Patent Application No. 14/640,799, entitled "SIGNAL AND POWER COMMUNICATION SYSTEM POSITIONED ON A ROTATABLE SHAFT", now US Patent Application Publication No. 2016/0256162, and - US Patent Application No. 14/640, 780, entitled "SURGICAL INSTRUMENT COMPRISING A LOCKABLE BATTERY HOUSING," now U.S. Patent Application Publication No. 2016/0256161.

The applicant of this application owns the following patent applications filed on February 27, 2015, the entire contents of which are each incorporated herein by reference:
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- US patent application Ser. SURGICAL APPARATUS CONFIGURED TO TRACK AN END-OF-LIFE PARAMETER”, now US Patent Application Publication No. 2016/0249917.

The applicant of the present application owns the following patent applications filed December 18, 2014, the entire contents of which are each incorporated herein by reference:
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser. ,
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- US Patent Application No. 14/574,493, entitled "SURGICAL INSTRUMENT ASSEMBLY COMPRISING A FLEXIBLE ARTICULATION SYSTEM", now US Patent Application Publication No. 2016/0174970; , entitled "SURGICAL INSTRUMENT ASSEMBLY COMPRISING A LOCKABLE ARTICULATION SYSTEM", now U.S. Patent Application Publication No. 2016/0174971.

The applicant of this application owns the following patent applications filed March 1, 2013, the entire contents of which are each incorporated herein by reference:
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- US Patent Application No. 13/782,375, entitled "ROTARY POWERED SURGICAL INSTRUMENTS WITH MULTIPLE DEGREES OF FREEDOM", now US Patent No. 9,398,911, and - US Patent Application No. 13/782,536. No., entitled "SURGICAL INSTRUMENT SOFT STOP", now U.S. Pat. No. 9,307,986.

The applicant of this application also owns the following patent applications filed March 14, 2013, the entire contents of which are each incorporated herein by reference:
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- US Patent Application No. 13/803,130, entitled "DRIVE TRAIN CONTROL ARRANGEMENTS FOR MODULAR SURGICAL INSTRUMENTS", now US Patent No. 9,351,727, and - US Patent Application No. 13/803,159. , entitled "METHOD AND SYSTEM FOR OPERATING A SURGICAL INSTRUMENT", now U.S. Patent Application Publication No. 2014/0277017.

The applicant of this application also owns the following patent applications filed March 7, 2014, the entire contents of which are incorporated herein by reference:
- US patent application Ser.

The applicant of this application also owns the following patent applications filed March 26, 2014, the entire contents of which are each incorporated herein by reference:
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- US patent application Ser. "SURGICAL INSTRUMENT COMPRISING A ROTATABLE SHAFT," now U.S. Patent Application Publication No. 2015/0280384.

The applicant of this application also owns the following patent applications filed September 5, 2014, the entire contents of which are each incorporated herein by reference:
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- US Patent Application No. 14/479,115, entitled "MULTIPLE MOTOR CONTROL FOR POWERED MEDICAL DEVICE", now US Patent Application Publication No. 2016/0066916, and - US Patent Application No. 14/479,108, Title of Invention "LOCAL DISPLAY OF TISSUE PARAMETER STABILIZATION", now US Patent Application Publication No. 2016/0066913.

The applicant of this application also owns the following patent applications filed on April 9, 2014, the entire contents of which are each incorporated herein by reference:
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
－米国特許出願第１４／２４８，５８４号、発明の名称「ＭＯＤＵＬＡＲ ＭＯＴＯＲ ＤＲＩＶＥＮ ＳＵＲＧＩＣＡＬ ＩＮＳＴＲＵＭＥＮＴＳ ＷＩＴＨ ＡＬＩＧＮＭＥＮＴ ＦＥＡＴＵＲＥＳ ＦＯＲ ＡＬＩＧＮＩＮＧ ＲＯＴＡＲＹ ＤＲＩＶＥ ＳＨＡＦＴＳ ＷＩＴＨ ＳＵＲＧＩＣＡＬ ＥＮＤ ＥＦＦＥＣＴＯＲ ＳＨＡＦＴＳ」、現在は米国特許出願公開第２０１４／０３０５９９４号、
- U.S. patent application Ser.
- US Patent Application No. 14/248,586, entitled "DRIVE SYSTEM DECOUPLING ARRANGEMENT FOR A SURGICAL INSTRUMENT", now US Patent Application Publication No. 2014/0305990, and - US Patent Application No. 14/248,607. , entitled "MODULAR MOTOR DRIVEN SURGICAL INSTRUMENTS WITH STATUS INDICATION ARRANGEMENTS", now U.S. Patent Application Publication No. 2014/0305992.

The applicant of this application also owns the following patent applications filed on April 16, 2013, the entire contents of which are each incorporated herein by reference:
- US Provisional Patent Application No. 61/812,365, entitled "SURGICAL INSTRUMENT WITH MULTIPLE FUNCTIONS PERFORMED BY A SINGLE MOTOR";
- US Provisional Patent Application No. 61/812,376, entitled "LINEAR CUTTER WITH POWER";
- US Provisional Patent Application No. 61/812,382, entitled "LINEAR CUTTER WITH MOTOR AND PISTOL GRIP",
- U.S. Provisional Patent Application No. 61/812,385, entitled "SURGICAL INSTRUMENT HANDLE WITH MULTIPLE ACTUATION MOTORS AND MOTOR CONTROL," and - U.S. Provisional Patent Application No. 61/812,372, entitled "SURGICAL INSTRUMENT WITH MULTIPLE FUNCTIONS PERFORMED BY A SINGLE MOTOR".

Numerous specific details are set forth in the specification to provide a thorough understanding of the overall structure, function, manufacture, and use of the embodiments as described in the specification and illustrated in the accompanying drawings. Well-known operations, components and devices have not been described in detail so as not to obscure the embodiments described herein. The reader is advised that the embodiments described and illustrated herein are non-limiting examples, and thus that specific structural and functional details disclosed herein may be representative and exemplary. will understand. Variations and changes can be made thereto without departing from the scope of the claims.

The terms "comprise" (any form of comprise, such as "comprises" and "comprising"), "have" (any form of have, such as "has" and "having"), "comprise ( "include" (any form of include, such as "includes" and "including") and "contain" (any form of contain, such as "contains" and "containing") refer to open-ended linkages. is a verb. As a result, a surgical system, device, or apparatus that “comprises,” “has,” “includes,” or “contains” one or more elements may refer to those one or more elements. have, but are not limited to having only one or more of those elements. Similarly, a system, device, or element of apparatus that “comprises,” “has,” “includes,” or “contains” one or more features may refer to those one or more features. have, but are not limited to having only one or more of those features.

The terms "proximal" and "distal" are used herein with reference to the clinician manipulating the handle portion of the surgical instrument. The term "proximal" refers to the portion closest to the clinician and the term "distal" refers to the portion located farther from the clinician. It will be further appreciated that for convenience and clarity, spatial terms such as "vertical," "horizontal," "above," and "below" may be used herein with respect to the drawings. However, surgical instruments are used in many orientations and positions, and these terms are not intended to be limiting and/or absolute.

Various exemplary devices and methods are provided for performing laparoscopic and minimally invasive surgery. However, the reader will readily appreciate that the various methods and devices disclosed herein can be used in many surgical procedures and applications, including, for example, those associated with open surgery. By reading the Detailed Description of the Invention herein, the reader will understand that the various instruments disclosed herein can be used to pierce an incision or puncture made in tissue, for example, through a natural orifice. It will further be appreciated that it may be inserted into the body in any manner, such as through a hole. The working or end effector portion of these instruments may be inserted directly into the patient's body or through an access device having a working channel through which the end effector and elongated shaft of the surgical instrument may be advanced. You can also

A surgical stapling system can comprise a shaft and an end effector extending from the shaft. The end effector has a first jaw and a second jaw. The first jaw includes a staple cartridge. Other implementations in which the staple cartridge is insertable into and removable from the first jaw, but the staple cartridge is not removable from the first jaw, or at least not easily replaceable. Morphology is also envisioned. The second jaw includes an anvil configured to deform staples ejected from the staple cartridge. Other embodiments are envisioned in which the second jaw is pivotable relative to the first jaw about the closing axis, but the first jaw is pivotable relative to the second jaw. be done. The surgical stapling system further includes an articulation joint configured to allow the end effector to rotate or articulate with respect to the shaft. The end effector is rotatable about an articulation axis that extends through the articulation joint. Other embodiments are also envisioned that do not include an articulation joint.

The staple cartridge has a cartridge body. The cartridge body includes a proximal end, a distal end and a deck extending between the proximal and distal ends. In use, the staple cartridge is positioned on a first side of the tissue to be stapled and the anvil is positioned on a second side of the tissue. The anvil is moved toward the staple cartridge to compress and clamp tissue against the deck. Staples removably stored within the cartridge body can then be deployed into tissue. The cartridge body includes a staple cavity defined therein, and staples are removably stored within the staple cavities. The staple cavities are arranged in six longitudinal rows. Three rows of staple cavities are positioned on a first side of the longitudinal slot and three rows of staple cavities are positioned on a second side of the longitudinal slot. Other arrangements of staple cavities and staples may also be possible.

The staples are supported by staple drivers within the cartridge body. The driver is movable between a first or unfired position and a second or fired position that ejects staples from the staple cavities. The driver is retained within the cartridge body by a retainer extending around the bottom of the cartridge body and includes a resilient member configured to grip the cartridge body and retain the retainer against the cartridge body. . The drivers are movable between their unfired position and their fired position by a sled. The sled is movable between a proximal position adjacent the proximal end and a distal position adjacent the distal end. The sled slides under the driver and includes a plurality of ramps configured to lift the driver, with staples supported thereon, toward the anvil.

In addition to the above, the sled is moved distally by the firing member. A firing member is configured to contact the sled and push the sled toward the distal end. A longitudinal slot defined within the cartridge body is configured to receive the firing member. The anvil also includes a slot configured to receive the firing member. The firing member further comprises a first cam that engages the first jaw and a second cam that engages the second jaw. As the firing member is advanced distally, the first cam and the second cam can control the distance between the deck of the staple cartridge and the anvil, ie, the tissue gap. The firing member also includes a knife configured to cut tissue captured intermediate the staple cartridge and the anvil. Desirably, the knife is positioned at least partially proximal to the ramp so that the staples are ejected forward of the knife.

FIG. 1 shows one form of an interchangeable surgical tool assembly 1000 operably coupled to a motorized handle assembly 500. As shown in FIG. Interchangeable surgical tool assembly 1000 may also be effectively used with tool drive assemblies of robotic or automated surgical systems. For example, the surgical tool assembly disclosed herein is disclosed in U.S. Pat. No. 9,072,535, entitled "SURGICAL STAPLING INSTRUMENTS WITH ROTATABLE STAPLE DEPLOYMENT ARRANGEMENTS," which is hereby incorporated by reference in its entirety. It can be used with various robotic systems, instruments, components, and methods such as, but not limited to, those disclosed. The handle assembly 500, as well as the tool drive assembly of the robotic system, may also be referred to herein as a "control system" or "control unit."

FIG. 2 shows the attachment of replaceable surgical tool assembly 1000 to handle assembly 500 . Handle assembly 500 may comprise a handle housing 502 that includes a pistol grip portion 504 that may be grasped and manipulated by a clinician. Handle assembly 500 may further include a frame 506 that operably supports multiple drive systems. For example, frame 506 may operably support a "first" or closure drive system, generally designated 510, which is operably attached or coupled to handle assembly 500. It can be used to apply an opening and closing motion to the replaceable surgical tool assembly 1000 . In at least one form, closure drive system 510 may include an actuator in the form of closure trigger 512 pivotally supported by frame 506 . Such a mechanism allows the clinician to manipulate the closure trigger 512 so that when the clinician grasps the pistol grip portion 504 of the handle assembly 500, the closure trigger 512 is moved to the start or "unactuated" position. , to an "actuated" position, more specifically a fully compressed or fully actuated position. In various forms, the closure drive system 510 further includes a closure linkage assembly 514 that is pivotally coupled or otherwise operably interfaces with the closure trigger 512 . As will be described in greater detail below, in the illustrated example, the closure linkage assembly 514 includes a lateral mounting pin 516 that facilitates attachment to a corresponding drive system on the surgical tool assembly. In use, the clinician presses the closure trigger 512 toward the pistol grip portion 504 to activate the closure drive system 510 . More details in U.S. patent application Ser. As described, the closure drive system 510 is configured to lock the closure trigger 512 in a fully depressed or fully actuated position when the clinician fully depresses the closure trigger 512 to reach a "full" closure stroke. be. When the clinician desires to unlock and bias the closure trigger 512 to the non-actuated position, the clinician simply actuates the closure release button assembly 518, which returns the closure trigger 512 to the non-actuated position. becomes possible. Closure release button assembly 518 may also be configured to interact with various sensors in communication with microcontroller 520 within handle assembly 500 to track the position of closure trigger 512 . Further details regarding the construction and operation of the closure release button assembly 518 can be found in US Patent Application Publication No. 2015/0272575.

In at least one form, the handle assembly 500 and frame 506 are configured to impart axial or firing motion to corresponding portions of an interchangeable surgical tool assembly attached thereto, herein firing motion. Another drive system, referred to as drive system 530, may be operably supported. Firing drive system 530 may employ an electric motor 505 located within pistol grip portion 504 of handle assembly 500, as described in more detail in US Patent Application Publication No. 2015/0272575. In various forms, motor 505 may be, for example, a brushed DC drive motor having a maximum speed of approximately 25,000 RPM. In another mechanism, motor 505 may include a brushless motor, cordless motor, synchronous motor, stepper motor, or any other suitable electric motor. Motor 505 may be powered by power supply 522, which in one form may comprise a removable power pack. The power pack may support multiple lithium-ion (“LI”) or other suitable batteries therein. Multiple batteries that can be connected in series can be used as the power source 522 for the handle assembly 500 . Additionally, power source 522 may be replaceable and/or rechargeable.

Electric motor 505 is configured to axially drive longitudinally movable drive member 540 distally and proximally, depending on the polarity of the motor. For example, when motor 505 is driven in a rotational direction, longitudinally movable drive member 540 will be axially driven in distal direction "DD". When motor 505 is driven in the opposite rotational direction, longitudinally movable drive member 540 will be driven axially in the proximal direction “PD”. Handle assembly 500 may include a switch 513 that may be configured to reverse the polarity applied to electric motor 505 by power supply 522 or otherwise control motor 505 . Handle assembly 500 may also include a sensor or sensors (not shown) configured to detect the position of drive member 540 and/or the direction in which drive member 540 is being moved. Actuation of motor 505 may be controlled by a firing trigger 532 pivotally supported on handle assembly 500 . Firing trigger 532 may be pivoted between an unactuated position and an actuated position. Firing trigger 532 may be biased to the unactuated position by a spring (not shown) or other biasing mechanism, so that when the clinician releases firing trigger 532, it springs or springs. It can be pivoted or otherwise returned to an inoperative position by a biasing arrangement. In at least one form, the firing trigger 532 can be positioned "outside" the closing trigger 512, as described above. As discussed in US Patent Application Publication No. 2015/0272575, handle assembly 500 may include a firing trigger safety button (not shown) to prevent accidental actuation of firing trigger 532. . When the closure trigger 512 is in the non-actuated position, the safety button is housed within the handle assembly 500 and is not readily accessible to the clinician and is in a safe position that prevents actuation of the firing trigger 532. The safety button cannot be moved to or from the firing position where firing trigger 532 can be fired. When the clinician depresses the closure trigger 512, the safety button and firing trigger 532 can pivot downward, allowing them to be subsequently manipulated by the clinician.

In at least one form, the longitudinally movable drive member 540 has a rack of teeth (not shown) formed thereon for meshing engagement with a corresponding drive gear mechanism (not shown) that interfaces with the motor 505 . (not shown). Further details regarding these features can be found in US Patent Application Publication No. 2015/0272575. At least one form is a manually actuated "emergency detachment" configured to allow a clinician to manually retract longitudinally movable drive member 540 in the event motor 505 becomes disabled. ” further includes assembly. The emergency release assembly may include a lever or emergency release handle assembly stored within handle assembly 500 under releasable door 550 . The lever is configured to be manually pivoted into ratchet engagement with the teeth of drive member 540 . Accordingly, the clinician can manually retract drive member 540 by ratcheting drive member 540 proximally “PD” using the emergency disengagement handle assembly. U.S. Patent Application Publication No. 12/249,117, entitled "POWERED SURGICAL CUTTING AND STAPLING APPARATUS WITH MANUALLY RETRACTABLE FIRRING SYSTEM," the entire disclosure of which is incorporated herein by reference (now U.S. Patent Application Publication No. 2010/ 0089970) discloses an emergency release mechanism and other components, mechanisms, and systems that may also be used with the tool assembly 1000.

5 and 6, replaceable surgical tool assembly 1000 includes shaft mounting portion 1300 operably attached to elongated shaft assembly 1400 . A surgical end effector 1100 comprising an elongated channel 1102 configured to operably support a surgical staple cartridge 1150 therein is operably attached to an elongated shaft assembly 1400 . See FIGS. 3 and 6. Surgical end effector 1100 may further include an anvil 1130 pivotally supported relative to elongate channel 1102 . Elongated channel 1102, with staple cartridge 1150 installed therein, and anvil 1130 may also be referred to as the "jaws" of the end effector. Interchangeable surgical tool assembly 1000 can be configured to releasably retain surgical end effector 1100 in a desired articulated position about articulation axis BB transverse to shaft axis SA. An articulation joint 1200 and an articulation lock 1210 (FIGS. 3 and 6) may also be included. Many details regarding the structure and operation of the articulation lock 1210 are provided in U.S. Patent Application Publication No. 13/803,086, entitled "ARTICULATABLE SURGICAL INSTRUMENT COMPARING AN ARTICULATION LOCK," the entire disclosure of which is incorporated herein by reference. , can be found in current US Patent Application Publication No. 2014/0263541. Further details regarding the articulation lock 1210 can be found in U.S. patent application Ser. SECONDARY CONSTRAINT".

As seen in FIGS. 5 and 6, shaft mounting portion 1300 is attached to a proximal housing or nozzle 1301 comprised of nozzle portions 1302, 1304 and assembled nozzle portions 1302, 1304 by fasteners, lugs, screws, or the like. and an actuator wheel portion 1306 configured to be coupled. In the illustrated embodiment, replaceable surgical tool assembly 1000 can be utilized to close and/or open anvil 1130 relative to elongate channel 1102 of surgical end effector 1100, as discussed in greater detail below. Further includes a closure assembly 1406 . Additionally, the illustrated replaceable surgical tool assembly 1000 includes a spine assembly 1500 that operatively supports the articulation lock 1210 . Spine 1500 firstly slidably supports firing member assembly 1600 therein and secondly extends around or otherwise movably supported by spine assembly 1500 . configured to slidably support a closed closure assembly 1406 .

In the illustrated mechanism, surgical end effector 1100 is operably coupled to elongated shaft assembly 1400 by articulation joint 1200, which is centered about articulation axis BB transverse to shaft axis SA. facilitating selective articulation of the surgical end effector 1100. See FIG. As seen in FIGS. 5 and 6, spine assembly 1500 slidably supports proximal articulation driver 1700 that operatively interfaces with articulation lock 1210 . Articulation lock 1210 is supported on distal frame segment 1560 , which also includes a portion of spine assembly 1500 . As seen in FIG. 6, distal frame segment 1560 includes distal spine extension 1562 pivotally coupled to elongate channel 1102 by end effector mounting assembly 1230 . In one mechanism, for example, distal end 1563 of distal frame segment 1560 has a spine mounting pin 1564 formed thereon. Spine mounting pin 1564 is adapted to be pivotally received within spine mounting hole 1234 formed in end effector mounting assembly 1230 . See FIG.

Referring again to FIG. 6 , in the illustrated embodiment, proximal articulation driver 1700 has a distal end 1702 configured to operatively engage articulation lock 1210 . Articulation lock 1210 includes an articulation frame 1212 pivotally coupled or pinned to distal articulation link 1710 that is also configured to be pivotally attached to end effector mounting assembly 1230 . Specifically, as seen in FIG. 6, the distal end 1712 of the distal articulation link 1710 is pivotally received within a corresponding articulation hole 1236 in the end effector mounting assembly 1230. Includes configured articulation pins 1714 . Distal articulation link 1710 is slidably supported by distal spine extension 1562 . End effector mounting assembly 1230 extends through lateral mounting holes 1231 in end effector mounting assembly 1230 and is received within channel or jaw mounting holes 1106 provided at proximal end 1103 of elongated channel 1102 . It is attached to proximal end 1103 of elongated channel 1102 by spring pin connector 1235 . Spine mounting pin 1564 defines an articulation axis BB transverse to shaft axis SA. Such a mechanism facilitates pivotal movement (ie, articulation) of surgical end effector 1100 about articulation axis BB with respect to spine assembly 1500 . As noted above, further details regarding the operation of articulation lock 1210 and articulation frame 1212 can be found in US Patent Application No. 13/803,086, now US Patent Application Publication No. 2014/0263541.

In various situations, spine assembly 1500 further includes intermediate spine segment 1510 attached to distal frame segment 1560 of articulation lock 1210 . Spine assembly 1500 includes opposing notches 1535 (only one visible in FIG. 5) for receiving corresponding mounting lugs 1308 (shown in FIG. 4) projecting inwardly from each of nozzle portions 1302, 1304. ), which further includes a proximal spine mounting segment 1530 that includes a proximal end portion 1532 having a . Such a mechanism facilitates rotation of proximal spine assembly 1500 about shaft axis SA by rotating nozzle 1301 about shaft axis SA. Interchangeable surgical tool assembly 1000 includes a chassis 1800 that rotatably supports shaft assembly 1400 . A proximal end portion 1532 of the proximal spine mounting segment is rotatably supported within a central shaft bore 1801 formed in chassis 1800 . Please refer to FIG. In one mechanism, for example, the proximal end portion 1532 may also be configured to attach to a spine bearing (not shown) or otherwise be supported within a spine bearing mounted within the chassis 1800 . It has threads 1533 on it. Such a mechanism facilitates rotatable mounting of spine assembly 1500 to chassis 1800 so that spine assembly 1500 can be selectively rotated relative to chassis 1800 about shaft axis SA.

Closure assembly 1406 includes elongated proximal closure member 1410 and distal closure member 1430 . In the illustrated mechanism, proximal closure member 1410 comprises a hollow tubular member slidably supported on spine assembly 1500 . As such, proximal closure member 1410 may also be referred to herein as a "proximal closure tube." Similarly, distal closure member 1430 may also be referred to as a "distal closure tube." Referring primarily to FIG. 5, replaceable surgical tool assembly 1000 includes closure shuttle 1420 slidably supported within chassis 1800 so that it can be moved axially relative to chassis 1800 . In one form, closure shuttle 1420 includes a pair of proximally projecting hooks 1421 configured to attach to lateral mounting pins 516 ( FIG. 2 ) attached to closure linkage assembly 514 of handle assembly 500 . Thus, once hook 1421 is hooked onto lateral mounting pin 516 , actuation of closure trigger 512 results in axial movement of closure shuttle 1420 and ultimately closure assembly 1406 on spine assembly 1500 . A closure spring (not shown) may also be journaled on closure sleeve 1406 and serves to bias closure assembly 1406 in the proximal direction “PD”, which allows surgical tool assembly 1000 to close handle assembly 500 . can serve to pivot the closure trigger 512 to the unactuated position. In use, closure assembly 1406 is translated distally (direction DD) to close jaws 1130 , 1102 , eg, in response to actuation of closure trigger 512 .

Closure linkage assembly 514 may also be referred to herein as a "closure actuator," and closure linkage assembly 514 and closure shuttle 1420 may be collectively referred to herein as a "closure actuator assembly." A proximal end 1412 of the proximal closure member 1410 is coupled to the closure shuttle 1420 for relative rotation therewith. For example, U-connector 1424 is inserted into annular slot 1414 at proximal end 1412 of proximal closure member 1410 and retained within vertical slot 1422 of closure shuttle 1420 . See FIG. Such a mechanism serves to attach proximal closure member 1410 to closure shuttle 1420 for axial movement therewith, while closure assembly 1406 rotates relative to closure shuttle 1420 about shaft axis SA. enable

As described above, the illustrated interchangeable surgical tool assembly 1000 includes an articulation joint 1200. As shown in FIG. As seen in FIG. 6 , upper and lower tangs 1415 , 1416 project distally from the distal end of proximal closure member 1410 and are movably coupled to distal closure member 1430 . As further seen in FIG. 6, distal closure member 1430 includes upper and lower projections 1434, 1436 projecting proximally from its proximal end. Proximal closure member 1410 and distal closure member 1430 are connected together by upper double pivot link 1220 . The upper dual pivot link 1220 includes proximal and distal pins that engage corresponding holes in the upper projections 1415, 1434 of the proximal closure member 1410 and distal closure member 1430, respectively. The proximal closure member 1410 and distal closure member 1430 are also linked together by a lower double pivot link 1222 . The lower dual pivot link 1222 includes proximal and distal pins that engage corresponding holes in the lower projections 1416 and 1436 of the proximal closure member 1410 and distal closure member 1430, respectively. As discussed in more detail below, distal and proximal axial translation of closure assembly 1406 effects opening and closing of anvil 1130 .

The replaceable surgical tool assembly 1000 shown in FIGS. 1-6 includes a surgical end effector 1100 articulatable in one direction about an articulation axis BB. As described above, articulation axis BB is defined by spine mounting pin 1564 that is rotatably received within spine mounting hole 1234 formed in end effector mounting assembly 1230 . In the illustrated arrangement, the spine mounting holes 1234 may be aligned transversely axially with the shaft axis SA. In other arrangements, the spine mounting holes 1234 may be slightly laterally offset from the shaft axis. In the example shown, articulation axis BB traverses and intersects shaft axis SA. The illustrated example is a proximal articulation drive that interfaces (via articulation lock 1210) with a single distal articulation link 1710 that operatively interfaces with and articulates end effector mounting assembly 1230. Only instrument 1700 is used. For example, distally advancing distal articulation link 1710 articulates surgical end effector 1100 in a single "first" articulation direction. In one mechanism, for example, surgical end effector 1100 may be selectively articulatable from a first, non-articulated position, surgical end effector 1100 having an articulation angle of about 110 degrees ( After surgical end effector 1100 exits the trocar and enters the patient), it is axially aligned with shaft assembly 1400 (for insertion through a trocar or other access opening). Other joint angle arrangements can also be achieved.

As seen in FIG. 7, for example, the replaceable surgical tool assembly 1000 may be suitable for use in connection with a medical procedure known as a lower anterior resection (LAR). Such procedures generally involve removal of the diseased portion of the colon. For example, the procedure may include removing blood vessels and lymph nodes associated with this portion of the intestine. The surgeon then rejoins the remaining colon with the remainder of the rectum (this may be referred to as an anastomosis). One challenge commonly encountered by surgeons during this procedure relates to getting the end effector deep enough into the pelvic region to complete the procedure. FIG. 7 shows the desired position of surgical end effector 1100 within the patient's pelvis 400 during resection of the patient's colon 410 . Line BTL in FIG. 7 may indicate the limits of movement generally provided by the patient's pelvic bony structure and related tissues. In the illustrated arrangement, surgical tool assembly 1000 employs an "asymmetric" proximal closure member 1410 configured to provide additional clearance and maneuverability for surgical tool assembly 1000 within that area. .

As seen in FIG. 7, in one example, proximal closure member 1410 of shaft assembly 1400 includes elongated proximal end portion 1417 and elongated distal end portion 1411 extending from proximal end portion 1417 . As seen in FIGS. 7-9, an asymmetrical cutout or notch region 1418 is added to the distal end portion 1411 of the proximal closure member 1410 to, for example, promote greater clearance between the shaft assembly 1400 and the pelvic structures. provided in In at least one example, notch region 1418 extends all the way through distal end portion 1411 . In such a mechanism, the axial length of distal end portion is less than the axial length of proximal end portion 1417 .

Referring now to FIG. 11, in the illustrated example, proximal end portion 1417 has an uninterrupted or "continuous" "proximal" perimeter or perimeter shape 1417P. At least a portion of distal end portion 1411 has a discontinuous or interrupted "distal" perimeter or outer perimeter shape 1411P. As further seen in FIG. 9, for example, distal spine extension 1562 has a similar notch region 1568 therein. Also, mid-spine segment 1510 may also have an asymmetrical notch 1516 therein that coincides with notch regions 1418 and 1568 . See FIGS. 10 and 11. FIG. Such a mechanism may allow the clinician to position shaft assembly 1400 and surgical end effector 1100 within the pelvic region to the position shown in FIG. In the illustrated mechanism, for example, the articulation angle AA may be approximately 110 degrees. Such a mechanism may thus provide the clinician with the ability to position the surgical end effector 1100 deeper within the pelvic region compared to other tools and end effector mechanisms. In the illustrated mechanism, notch regions 1418, 1516, 1568 are located on opposite sides of shaft axis SA from which end effector 1100 articulates (eg, in the direction of articulation DA). However, other mechanisms contemplate that the notch regions 1418, 1516, 1568 are provided on the same side of the shaft axis SA from which the surgical end effector articulates.

In one embodiment, the proximal closure member 1410 remains axially aligned on the spine assembly 1500 and the end effector jaws 1410 move axially on the spine assembly 1500 as the proximal closure member 1410 moves axially on the spine assembly 1500 . Opposing closure alignment members 1413 are used to retard or prevent buckling of the shaft components during articulation and closure of 1130,1102. In one mechanism, for example, a pair of diametrically opposed alignment pins 1413 are attached to the proximal closure member 1410 and extend inwardly from the proximal closure member 1410 to provide medial spine segment 1510 and distal spine segment 1510 . Slidably received within corresponding alignment slots 1514 , 1566 in spine extension 1562 , respectively. See FIGS. 10 and 11. FIG. As further seen in FIG. 11 , distal spine extension 1562 may have a recessed area 1567 for receiving downwardly projecting lug portion 1518 formed on the underside of intermediate spine segment 1510 . . Such a mechanism may function to provide some lateral interlocking of the intermediate spine segment 1510 and the distal spine extension 1562 together so that any lateral deflection occurs between these components. can function to resist FIG. 12 illustrates the relationship between the upper and lower projections 1415, 1416 where the proximal closure member 1410' may function to limit any tendency of the upper and lower projections 1415, 1416 to spread apart during use. An alternative proximal closure member 1410' is shown that is identical to the proximal closure member 1410 described above except that it includes a connector bridge 1419 extending therebetween.

FIG. 13 is configured to prevent or limit proximal closure member 1410'' from opening in direction OD when a lateral load LL is applied laterally to shaft assembly 1400 within the notch region. Another mechanism is shown. Proximal closure member 1410'' may be identical to proximal closure member 1410 except for the differences described herein. As seen in FIG. 13 , the proximal closure member 1410 ″ further includes a pair of inwardly projecting, somewhat diametrically opposed bending tabs 1425 . One flexion tab 1425 is slidably received in a corresponding axially extending slot 1519 and the other flexion tab 1425 is slidably received in a corresponding axial slot 1569 in distal spine extension 1562 . Slidably received. Such a mechanism slidably interlocks the proximal closure member 1410'' over the spine assembly 1500' such that the proximal closure member 1410'' opens when a lateral load LL is applied. It serves to resist (in the OD direction). FIG. 14 shows an alternative mechanism that uses bending tabs 1425' that are somewhat L-shaped and are slidably received in corresponding L-shaped slots 1514' and 1569'.

As mentioned above, replaceable surgical tool assembly 1000 further includes firing member assembly 1600 supported for axial movement within spine assembly 1500 . In the illustrated embodiment, firing member assembly 1600 includes a proximal firing shaft segment 1602 and a distal cutting portion or distal firing bar 1620 . Firing member assembly 1600 may also be referred to herein as a "second shaft" and/or a "second shaft assembly." As seen in FIG. 5, proximal firing shaft segment 1602 projects proximally from its proximal end and has firing shaft mounting within longitudinally movable drive member 540 supported within handle assembly 500 . It includes a proximal mounting lug 1604 configured to be operatively received within cradle 542 . Please refer to FIG.

Referring again to FIG. 5, the distal end 1606 of the proximal firing shaft segment 1602 has longitudinal slots 1608 configured to receive tabs (not shown) on the proximal end of the distal firing bar 1620. include. Longitudinal slot 1608 and proximal end of distal firing bar 1620 may be sized and configured to allow relative movement therebetween and may include a slip joint 1622 . Slip joint 1622 may move proximal firing shaft segment 1602 without, or at least substantially without, moving distal firing bar 1620 during articulation actuation. Once end effector 1100 is properly oriented, proximal firing shaft segment 1602 is advanced distally until the proximal end wall of slot 1608 contacts the tabs on distal firing bar 1620 for distal firing. Bar 1620 can be advanced to fire surgical staple cartridge 1150 positioned within elongated channel 1102 . As further seen in FIG. 5, middle spine segment 1510 includes channel 1512 for slidably supporting proximal firing shaft segment 1602 therein. To facilitate assembly of proximal firing shaft segment 1602 and spine assembly 1500, upper spine cover 1527 may be engaged with intermediate spine segment 1510 to enclose those portions of firing member assembly 1600 therein. good.

FIG. 15 shows surgical end effector 1100 in an articulated position. As seen in FIGS. 15 and 6, central support member 1614 provides lateral support to distal firing bar 1620 as it bends to accommodate articulation of surgical end effector 1100 . used to provide In one embodiment, distal pivot pin 1615 projects from the distal end of central support member 1614 and is received within spine mounting hole 1234 of end effector mounting assembly 1230 . Proximal pivot pin 1616 is received within elongated slot 1569 of distal spine extension 1562 . Additionally, central support member 1614 includes passageways 1618 therein that provide lateral support for distal firing bar 1620 while surgical end effector 1100 is articulated. Further details regarding the central support member and alternative knife bar support mechanisms are disclosed in US patent application Ser. No. 15/019,245, which is incorporated herein by reference in its entirety.

FIG. 15A shows an alternative articulation joint 1200' that facilitates articulation of surgical end effector 1100 about articulation axis BB transverse to shaft axis SA defined by elongated shaft assembly 1400'. , articulation joint 1200' is operably attached to elongated shaft assembly 1400'. In the illustrated example, surgical end effector 1100 is selectively articulatable to one side of shaft axis SA. These articulation directions are represented by arrows LD. Similar to the embodiments described above, end effector mounting assembly 1230 is pivotally attached to proximal end 1103 of elongated channel 1102 of surgical end effector 1100 . End effector mounting assembly 1230 is pivotally attached to distal spine extension 1562 of distal frame segment 1560 of elongated shaft assembly 1400'. Similar to the embodiments described above, the distal frame segment 1560 has a proximal articulation driver 1700 (see FIG. 11) that operably interfaces with articulation and retraction sources, as described in detail herein. 6) can operably support an articulation lock 1210 (FIG. 6) actuated by. In the example shown in FIG. 15A, end effector mounting assembly 1230 is pivotally attached to distal spine extension 1562 by distal support link 1570 . In one mechanism, for example, end effector mounting assembly 1230 is pinned to distal end 1572 of distal support link 1570 by articulation pin 1580, which defines articulation axis BB. The proximal end 1574 of the distal support link 1570 is attached to the distal end 1563 of the distal spine extension 1562 for axial and pivotal movement relative thereto.

15A, proximal end 1574 of distal support link 1570 is adapted to slidably and pivotally receive proximal mounting pin 1578 attached to distal spine extension 1562 therein. includes an axial slot 1576 sized to . Such a mechanism provides selective pivotal movement (articulation) and some limited axial movement of surgical end effector 1100 about articulation axis BB with respect to distal frame segment 1560. 1560 serves to connect to the distal frame segment 1560. In the illustrated mechanism, articulation is imparted to surgical end effector 1100 by distal articulation link 1710 pivotally coupled to or otherwise operatively interfacing with articulation lock 1210 . Axial movement of distal articulation link 1710 in the proximal direction PD (which is constrained to move axially along one side of shaft axis SA) causes surgical end effector 1100 to move into a surgical position. Leftwards LD from a non-articulated position in which the end effector 1100 is axially aligned on the shaft axis SA to an articulated position on the left side of the shaft axis SA (represented by phantom lines in FIG. 15A). to exercise joints; Axial movement of distal articulation link 1710 in distal direction DD moves surgical end effector 1100 from the articulated position toward the unactuated position (arrow RD). In one mechanism, when the surgical end effector 1100 reaches the unactuated position, it contacts the distal end 1563 of the distal spine extension to prevent it from moving further in the right direction RD. A stop member or stop formation 1232 is formed in or otherwise attached to the end effector mounting assembly 1230 . Such an articulation joint mechanism may provide improved articulation movement and closure stability.

In addition to the above, the replaceable surgical tool assembly 1000 further includes a clutch assembly 1640 that can be configured to selectively and releasably couple the proximal articulation driver 1700 to the firing member assembly 1600. . In one form, clutch assembly 1640 includes, in at least one embodiment, a rotating lock assembly comprising a locking collar or locking sleeve 1650 positioned about firing member assembly 1600 . Locking sleeve 1650 has an engaged position in which locking sleeve 1650 couples proximal articulation driver 1700 to firing member assembly 1600 and an engagement in which proximal articulation driver 1700 is not operatively coupled to firing member assembly 1600 . configured to be rotated to and from a disengaged position; When locking sleeve 1650 is in its engaged position, distal movement of firing member assembly 1600 can cause proximal articulation driver 1700 to move distally, which correspondingly causes firing member assembly 1600 to move distally. A proximal movement of can cause the proximal articulation driver 1700 to move proximally. When locking sleeve 1650 is in its disengaged position, no movement of firing member assembly 1600 is transmitted to proximal articulation driver 1700 such that firing member assembly 1600 is independent of proximal articulation driver 1700. can be moved by Under various circumstances, proximal articulation driver 1700 is held in place by articulation lock 1210 when proximal articulation driver 1700 is not being moved proximally or distally by firing member assembly 1600. can be

Referring primarily to FIGS. 4 and 5 , locking sleeve 1650 is cylindrical, or at least substantially elongated, including longitudinal opening 1652 configured to receive proximal firing shaft segment 1602 of firing member assembly 1600 . with a cylindrical body. Locking sleeve 1650 also has two diametrically opposed, inwardly directed locking projections 1654 and an outwardly directed second locking member 1656 formed thereon. Locking projection 1654 may be configured to selectively engage proximal firing shaft segment 1602 of firing member assembly 1600 . More specifically, when locking sleeve 1650 is in its engaged position, locking projection 1654 is positioned within drive notch 1603 provided in proximal firing shaft segment 1602, thereby providing a distal pushing force. and/or proximal pulling force may be transferred from firing member assembly 1600 to locking sleeve 1650 . When locking sleeve 1650 is in its engaged position, second locking member 1656 is received within drive notch 1704 defined in proximal articulation driver 1700 , thereby applying a distal force to locking sleeve 1650 . A proximal pushing force and/or a proximal pulling force can be transmitted to the articulation driver 1700 . In effect, firing member assembly 1600, locking sleeve 1650, and proximal articulation driver 1700 move together when locking sleeve 1650 is in its engaged position. On the other hand, when locking sleeve 1650 is in its disengaged position, locking projection 1654 cannot be positioned within drive notch 1603 of proximal firing shaft segment 1602 of firing member assembly 1600, resulting in distal Pushing forces and/or proximal pulling forces cannot be transferred from firing member assembly 1600 to locking sleeve 1650 . Correspondingly, distal pushing forces and/or proximal pulling forces cannot be transmitted to the proximal articulation driver 1700 . Under these circumstances, firing member assembly 1600 may be slid proximally and/or distally relative to locking sleeve 1650 and proximal articulation driver 1700 .

Clutch assembly 1640 further includes switch drum 1630 that interfaces with lock sleeve 1650 . Further details regarding the operation of switch drum 1630 and locking sleeve 1650 are found in US Patent Application Serial Nos. 13/803,086 and 15/019,196, each of which is incorporated herein by reference in its entirety. be able to. The switch drum 1630 can further include an at least partially circumferentially extending opening 1632 defined therein, the opening 1632 being a circumferential mounting extending from the nozzle portions 1302,1304. 1305 can be accommodated to allow relative rotation but not translation between switch drum 1630 and proximal nozzle 1301 . See FIG. Rotation of nozzles 1301 to the point that the mounts reach the ends of their corresponding openings 1632 in switch drum 1630 results in rotation of switch drum 1630 about shaft axis SA. Rotation of switch drum 1630 ultimately results in movement of locking sleeve 1650 between its engaged and disengaged positions. In an alternative embodiment, nozzle 1301 may be used to operatively engage and disengage the articulation drive system with the firing drive system. As indicated above, clutch assembly 1640 can operate in a variety of ways that are described in more detail in US patent application Ser. Nos. 13/803,086 and 15/019,196.

In the illustrated mechanism, switch drum 1630 includes an L-shaped slot 1636 that extends into a distal opening 1637 of switch drum 1630 . Distal opening 1637 receives lateral switch pin 1639 of shifter plate 1638 . In one embodiment, shifter plate 1638 includes longitudinal slots (not shown) provided in locking sleeve 1650 to facilitate axial movement of locking sleeve 1650 when engaged with proximal articulation driver 1700 . ). Further details regarding the operation of the shifter plate and shift drum mechanism are found in U.S. patent application Ser. SURGICAL STAPLING INSTRUMENT WITH SHAFT RELEASE, POWERED FIRING AND POWERED ARTICULATION".

Also, in the illustrated embodiment, switch drum 1630 includes a magnet support arm 1665 that supports a magnet or other sensor mechanism, which is attached to slip ring assembly 1660 operably mounted to chassis 1800 . It is configured to operatively interface with a Hall effect sensor 1662 that interfaces with. Slip ring assembly 1660, for example, conducts power to and/or from replaceable surgical tool assembly 1000 and/or signals to replaceable surgical tool assembly 1000 components, and /or configured to communicate from the replaceable surgical tool assembly 1000 back to the microcontroller 520 (FIG. 2) in the handle assembly 500 or the robotic system controller. Further details regarding the slip ring assembly 1660 and associated connectors can be found in U.S. patent application Ser. US patent application Ser. can. Magnet(s) supported on magnet support arm 1665 cooperate with Hall effect sensor 1662 or other sensor mechanism to detect the rotational position of switch drum 1630 and communicate that information to microcontroller 520 . , microcontroller 520 may be responsible for providing instruction(s) to the user in a variety of ways as described in the above incorporated references. Other sensor mechanisms may be used.

Referring again to FIGS. 2 and 5, chassis 1800 is adapted to be received within corresponding dovetail slots 507 formed on chassis 1800 and formed in the distal end portion of frame 506 of handle assembly 500 . It also includes at least one and preferably two tapered mounting portions 1802 . As further seen in FIG. 2, shaft mounting lugs 1607 are formed at the proximal end of proximal firing shaft segment 1602 . As will be described in greater detail below, when replaceable surgical tool assembly 1000 is coupled to handle assembly 500, shaft mounting lug 1607 engages a firing shaft formed at the distal end of longitudinally moveable drive member 540. It is received in mounting cradle 542 . Please refer to FIG.

Interchangeable surgical tool assembly 1000 employs latch system 1810 to removably couple interchangeable surgical tool assembly 1000 to frame 506 of handle assembly 500 . As seen in FIG. 5, for example, in at least one form latch system 1810 includes a locking member or locking yoke 1812 movably coupled to chassis 1800 . In the illustrated embodiment, for example, locking yoke 1812 has a U-shape and includes two downwardly extending legs 1814 . Legs 1814 each have pivot lugs (not shown) formed thereon that are adapted to be received in corresponding holes 1816 formed in chassis 1800 . Such a mechanism facilitates pivotal attachment of lock yoke 1812 to chassis 1800 . Locking yoke 1812 includes two proximally projecting locking lugs 1818 configured to releasably engage corresponding locking detents or grooves 509 in the distal end of frame 506 of handle assembly 500 . It's okay. Please refer to FIG. In various forms, locking yoke 1812 is biased proximally by a spring or biasing member 1819 . Actuation of lock yoke 1812 may be accomplished by latch button 1820 slidably mounted on latch actuator assembly 1822 mounted on chassis 1800 . Latch button 1820 may be biased proximally against locking yoke 1812 . Lock yoke 1812 can be moved to the unlocked position by biasing latch button 1820 distally, which further pivots lock yoke 1812 to the distal end of frame 506 . retentively disengages from. When locking yoke 1812 is “retainingly engaged” with the distal end of frame 506 , locking lugs 1818 retainably seat within corresponding locking detents or grooves 509 in the distal end of frame 506 . ing.

In the illustrated mechanism, locking yoke 1812 includes at least one and preferably two locking hooks 1824 adapted to contact corresponding locking lug portions 1426 formed on closure shuttle 1420 . When closure shuttle 1420 is in the unactuated position, locking yoke 1812 can be pivoted distally to unlock replaceable surgical tool assembly 1000 from handle assembly 500 . When in this position, locking hook 1824 does not contact locking lug portion 1426 on closure shuttle 1420 . However, when the closure shuttle 1420 is moved to the actuated position, the locking yoke 1812 is prevented from pivoting to the unlocked position. In other words, if the clinician attempts to pivot the locking yoke 1812 to the unlocked position, or inadvertently, for example, in such a way that the locking yoke 1812 may otherwise be pivoted distally, , the locking hooks 1824 on the locking yoke 1812 contact the locking lugs 1426 on the closure shuttle 1420 and prevent the locking yoke 1812 from moving to the unlocked position. Please refer to FIG. Further details regarding the latch system can be found in US Patent Application Publication No. 2014/0263541.

The attachment of replaceable surgical tool assembly 1000 to handle assembly 500 will now be described with reference to FIG. To begin the coupling process, the clinician positions chassis 1800 of interchangeable surgical tool assembly 1000 such that tapered mounting portion 1802 formed on chassis 1800 is aligned with dovetail slot 507 of frame 506 . It may be positioned above or adjacent to the distal end of frame 506 . The clinician then moves surgical tool assembly 1000 along installation axis IA perpendicular to shaft axis SA to align tapered mounting portion 1802 with corresponding dovetail receiving slot 507 in the distal end of frame 506. It may be seated in a "operably engaged" state. In doing so, the shaft mounting lug 1606 on the proximal firing shaft segment 1602 is also received in the cradle 542 of the longitudinally movable drive member 540 and a portion of the lateral mounting pin 516 on the closure linkage assembly 514 is mounted. , are seated in corresponding hooks 1421 of the closure shuttle 1420 . As used herein, the term "operable engagement" in the context of two components means that the two components are fully engaged together such that upon application of an actuation motion, the components means capable of performing the intended acts, functions and/or procedures.

Referring again to FIGS. 11 and 15, distal firing bar 1620 may include a laminated beam structure including at least two beam layers. Such beam layers may include, for example, stainless steel bands interconnected by welding or pinning together at their proximal ends and/or at other locations along their lengths. . In an alternative embodiment, the distal ends of the bands are not connected together to allow the laminations or bands to expand relative to each other as the end effector articulates. Such a mechanism allows distal firing bar 1620 to be flexible enough to accommodate articulation of the end effector. Various other suitable laminated knife bar mechanisms are disclosed in US patent application Ser. No. 15/019,245. As further seen in FIG. 4 , central support member 1614 provides lateral support to distal firing bar 1620 as distal firing bar 1620 bends to accommodate articulation of surgical end effector 1100 . used to bring Further details regarding the central support member and alternative knife bar support mechanisms are disclosed in US patent application Ser. No. 15/019,245.

After replaceable surgical tool assembly 1000 is operably coupled to handle assembly 500 (FIG. 1), a clinician can manipulate surgical tool assembly 1000 as follows. As described above, when the closure drive system 510 is in its inoperative position (i.e., the closure trigger 512 is not actuated), the torsion spring 1642 engages the clutch assembly 1640, and more specifically the switch pin 1639 and lock. The sleeve 1650 is biased to the articulated position. When in this mode, the magnet(s) in magnet support arm 1665 cooperate with Hall effect sensor 1662 or other sensor mechanism to indicate to microcontroller 520 that surgical tool assembly 1000 is in articulation mode. can be shown in When the clinician actuates firing trigger 532, the motor drives proximal firing shaft segment 1602 distally. However, as described above, slip joint 1622 facilitates movement of proximal firing shaft segment 1602 without, or at least substantially without, moving distal firing bar 1620 . Because locking sleeve 1650 is operably engaged with proximal firing shaft segment 1602 and proximal articulation driver 1700 is engaged with locking sleeve 1650, actuation of proximal firing shaft segment 1602 causes proximal articulation. Distal movement of motion driver 1700 is provided. Distal movement of proximal articulation driver 1700 articulates surgical end effector 1100 about articulation axis BB. During this time, the clinician can also partially close the jaws of surgical end effector 1100 by partially depressing the closure trigger. Such a mechanism facilitates axial movement of proximal closure member 1410 without automatically shifting clutch assembly 1640 into firing mode. This feature may allow the clinician to use the jaws to grasp and manipulate tissue prior to clamping onto the target tissue.

Once the clinician has articulated surgical end effector 1100 to the desired position and the jaws are positioned in the desired orientation relative to the target tissue, the clinician releases firing trigger 532, which causes proximal firing shaft segment 1602 and The motorized motion of the proximal articulation driver 1700 is discontinued. Articulation lock 1210 locks proximal articulation driver 1700 in position to prevent further articulation of surgical end effector 1100 . A clinician can clamp the target tissue between the jaws by depressing the closure trigger 512 to the fully depressed position. Such action moves proximal closure member 1410 distally. Such distal movement of proximal closure member 1410 causes shifter plate 1638 to rotate locking sleeve 1650 to a disengaged position with proximal firing shaft segment 1602 . When in this position, locking projection 1654 disengages drive notch 1603 in proximal firing shaft segment 1602 . Thus, proximal firing shaft segment 1602 can move axially without moving locking sleeve 1650 and proximal articulation driver 1700 . When proximal closure member 1410 is moved distally to the fully actuated position (by depressing closure trigger 512), proximal closure member 1410 and distal closure member 1430 move distally to open jaws 1130. , 1102 are closed. When in this position, the closure drive system 510 within the handle assembly 500 can be locked and the clinician can release the closure trigger 512 . Once clutch assembly 1640 has moved into this firing mode, a magnet or other sensor in magnet support arm 1665 or other portion communicates with Hall effect sensor 1662 to indicate to microcontroller 520 the position of clutch assembly 1640 .

The microcontroller 520 provides the clinician with an indication of the position of the distal firing bar 1620 as it advances distally through the target tissue clamped between the end effector jaws. good too. Once the distal firing bar 1620, and more specifically the firing member or knife member attached to the distal firing bar 1620, has been advanced to the fully fired position, the microcontroller 520 uses sensor mechanisms to control the firing member assembly 1600. The position of the portion can be detected and then the motor reversed to retract the distal firing bar 1620 to its starting position. This action may be automatic, or may require the clinician to depress firing trigger 532 during the retraction process. Once distal firing bar 1620 is fully retracted to its start position, microcontroller 520 determines that distal firing bar 1620 is fully retracted, unlocks closure trigger 512 and deactivates closure assembly 1406 . An indication can be provided to the clinician that it can be returned to position thereby moving the jaws to the open position.

In one embodiment, elongated channel 1102 is generally C-shaped with two upstanding sidewall portions 1104 . Anvil 1130 includes anvil body portion 1132 and anvil mounting portion 1134 . Anvil mounting portion 1134 includes a pair of anvil mounting walls 1136 separated by slots 1138 (FIG. 6). As described above, end effector mounting assembly 1230 extends through lateral mounting holes 1231 in end effector mounting assembly 1230 and is received within channel mounting holes 1106 provided in side walls 1104 of elongated channel 1102 . It is pivotally attached to the proximal end 1103 of the elongated channel 1102 by a spring pin connector 1235 that is attached to the elongated channel 1102 . Anvil mounting walls 1136 each have an anvil trunnion 1137 projecting therefrom such that each anvil trunnion 1137 is rotatably received within a corresponding anvil mounting hole 1107 in proximal end 1103 of elongated channel 1102 . are adapted. As seen in FIGS. 16 and 17, the channel sidewalls 1104 may each have a vertical slot or relieved area 1108 corresponding to each anvil mounting hole 1107, the vertical slots or relieved areas 1108 being: Allows the anvil trunnion 1137 to drop vertically into each slot 1108 for ease of assembly. Anvil trunnion defines a pivot axis PA about which anvil 1130 is selectively pivotable relative to elongated channel 1102 . In various embodiments, pivot axis PA is transverse to shaft axis SA. See FIG.

Elongated channel 1102 is configured to operably support surgical staple cartridge 1150 therein. Surgical staple cartridge 1150 includes a cartridge body 1151 defining a deck surface 1152 facing staple-forming lower surface 1133 of anvil body portion 1132 . Cartridge body 1151 has an elongated slot 1154 extending through cartridge body 1151 to allow passage of firing member 1670 attached to the distal end of distal firing bar 1620 . Cartridge body 1151 has a plurality of anvil pockets 1156 arranged linearly in series on opposite sides of elongated slot 1154 . See FIG. Staple drivers that operably support one or more surgical staples or fasteners thereon are housed within these pockets 1156 . Positioning the target tissue so that when the target tissue is clamped between the staple forming lower surface 1133 of the anvil body 1132 and the staple cartridge deck surface 1152, the tissue to be cut is stapled on each side of the cut line. It is necessary to. The anvil 1130 may include two downwardly extending tissue stops 1140 to avoid targeting tissue proximal to the most proximal staple or fastener. See FIG. When tissue stop 1140 extends downwardly beyond cartridge deck surface 1152 , it serves to prevent target tissue from reaching too proximally between anvil 1130 and surgical staple cartridge 1150 .

18 and 19, in the illustrated embodiment, anvil mounting wall 1136 is somewhat elongated and extends proximally. In one embodiment, one or both of the anvil mounting walls 1136 includes an aperture limiter 1139 (FIG. 18) formed thereon that contacts the end effector mounting assembly 1230 to allow the anvil 1130 to is configured to prevent excessive opening. See FIG. Such anvil opening limiters 1139 can prevent the anvil 1130 from becoming too loose and tight on the elongated channel 1102 . Additionally, aperture limiter 1139 prevents anvil 1130 from opening to a position where tissue stop 1140 extends above cartridge deck surface 1152 . When this occurs, tissue may be allowed to extend too proximally between anvil 1130 and surgical staple cartridge 1150, and may be cut but not stapled. be. Such a mechanism may also function to prevent the anvil from being perceived as too loose and tight with respect to the elongated channel.

Referring again to FIG. 17, the anvil mounting portion 1134 defines a firing member "parking area" 1141 that houses the firing member 1670 when the firing member 1670 is in the fired (unfired) position. In the illustrated arrangement, at least a portion of parking area 1141 is proximal to the pivot axis. For example, see FIG. Such a mechanism can reduce the negative moment arm resulting from tissue clamped between anvil 1130 and surgical staple cartridge 1150 supported within elongated channel 1102 . In one embodiment, anvil cap or cover 1142 is attached to anvil mounting portion 1134 and provides closure for contact by a distal camming ramp or surface 1440 formed on distal end 1431 of distal closure member 1430 . A front surface 1143 is provided. Please refer to FIG. In one mechanism, anvil cap 1142 includes a pair of downwardly extending legs 1144 configured to snap-engage mounting lugs 1145 formed on anvil mounting wall 1136 . As seen in FIG. 16, for example, anvil cap 1142 extends distally between anvil mounting walls 1136 and covers firing member 1670 when within firing member parking region 1141. including a transition portion 1146 that is present. Transition portion 1146 extends between anvil mounting wall portions 1136 to form a transition from closure front surface 1143 and anvil cam surface 1147 formed on anvil mounting portion 1134 . In addition, anvil cap 1142 eliminates a pinch point that might otherwise exist between anvil mounting portion 1134 and distal end 1431 of distal closure member 1430 when anvil 1130 is in its fully open position. can be minimized.

The operation of the closing process used in this embodiment will now be described with reference to Figures 18A, 19 and 20A. In the illustrated arrangement, anvil body 1132 defines upper anvil surface 1135 . As seen in FIG. 18A, the camming area or surface 1147 formed on the anvil mounting portion 1134 gradually transitions to the upper anvil surface 1135 . More specifically, in the illustrated mechanism, camming surface 1147 comprises two surface portions, proximal camming surface portion 1147P and distal camming surface portion 1147D. In at least one example, proximal camming surface portion 1147P extends from the proximal end of anvil body 1132 to distal camming surface portion 1147D. Distal camming surface portion 1147D extends from proximal camming surface portion 1147P to upper anvil surface 1135 . In one mechanism, proximal camming surface portion 1147P may have a slightly steeper angle than distal camming surface portion 1147D. In other arrangements, the cam surfaces on the anvil mounting portion may comprise one continuous cam surface oriented with respect to the outer surface at a single cam angle.

As seen in FIG. 19, distal closure member 1430 has a distal end surface 1431 formed on its distal end. Distal camming surface 1440 extends at an obtuse camming angle CA with respect to distal end surface 1431 . In the illustrated arrangement, distal closure member 1430 comprises a distal closure tube having an outer surface 1433 and an inner surface 1435 defining a cross-sectional thickness CT therebetween. Distal end surface 1431 includes a portion of cross-sectional thickness CT. Distal camming surface 1440 extends from distal end surface 1431 of distal closure member 1430 to inner surface 1435 . Initial camming region 1437 includes the intersection line or point between distal end surface 1431 and distal camming surface 1440 .

FIG. 18A shows distal closure member 1430 in the starting position with anvil 1130 in the open position. As seen in FIG. 18A, distal camming surface 1440 contacts closure front surface 1143 on anvil cap 1142 . To initiate the closing process, distal closure member 1430 is axially advanced in distal direction DD. When initial cam region 1437 and/or distal end surface 1431 first contact cam surface 1147 (proximal cam surface portion 1147P), it is subjected to an initial closing motion or initial closing force ICF. Please refer to FIG. This initial closing force ICF is perpendicular or perpendicular to the proximal camming surface portion 1147P. Continued axial advancement of distal closure member 1430 brings distal camming surface 1440 into camming engagement with camming surface 1147 (distal camming surface 1147D) and applies a closure force CF essentially parallel to shaft axis SA. Add essentially. See FIG. 20A.

In the above example, anvil mounting wall 1136 may have a length somewhat longer than anvil mounting configurations used by other anvil mechanisms. Elongated anvil mounting wall 1136 thus serves to allow the pivot axis to be positioned relatively close to the articulation axis defined by articulation joint 1200 . This mechanism facilitates the establishment of a longer initial moment arm MAI (FIG. 19) between the pivot axis PA and the initial closing force ICF. Such a mechanism also facilitates the location of pivot axis PA slightly closer to the bottom of elongated channel 1102 compared to other anvil/channel mounting mechanisms. Thus, in the illustrated mechanism, the distance between the pivot axis PA and the axis over which the closing force CF is applied is somewhat greater than in other mechanisms (larger moment arms). This mechanism may also result in establishing a greater closing force CF compared to other anvil mounting mechanisms. Accordingly, the anvil attachment mechanism of the illustrated embodiment can provide a greater mechanical closure effect than is typically achievable with other anvil attachment mechanisms. Another advantage that may be obtained by the foregoing example is that locating at least a portion of firing member parking area 1141 proximal to pivot axis PA is added to the anvil by tissue clamped between the anvil and cartridge. It can help reduce the "negative" moment arm.

21-25, distal closure member 1430 is formed with at least one and preferably two positive jaw opening hooks or tabs 1442. As shown in FIG. Tabs 1442 may also be referred to herein as "primary positive jaw opening tabs." In one embodiment, positive jaw opening tabs are integrally formed with distal closure member 1430 . For example, the positive jaw opening tab 1442 is cut from the wall of the tubular structure that includes the distal closure member 1430 . Positive jaw opening tabs 1442 each include an upwardly projecting hook portion 1444 having a rounded camming end 1445 formed thereon that extends downwardly from anvil body portion 1132 . It is configured for camming engagement with a corresponding extending anvil opening ramp 1148 . FIG. 22 shows the position of anvil 1130 and distal closure member 1430 when anvil 1130 is in the closed orientation. FIG. 23 shows the beginning of the opening process as the distal closure member 1430 begins to retract in the proximal direction PD. As seen in FIG. 23, camming end 1445 first contacts anvil opening ramp 1148 . FIG. 24 shows anvil 1130 in a partially open position and FIG. 25 shows anvil 1130 in a fully open position. As seen in FIG. 25, the camming edge 1445 rests on the bottom edge 1149 of the anvil opening ramp and holds the anvil 1130 in the fully open position. The use of such features on the distal closure member to achieve the opening of the anvil from the fully closed position to the fully open position may be referred to herein as a "positive jaw opening" feature. Other suitable positive jaw opening mechanisms are disclosed in U.S. patent application Ser. ing.

26-29 show an alternative distal closure member 1430' that employs a secondary positive jaw opening tab 1448 configured to cooperate with a secondary jaw opening feature 1160 formed on the anvil mounting wall 1136. indicate. See FIGS. 16, 17 and 27. FIG. As seen in FIG. 26, secondary positive jaw opening tab 1448 contacts secondary jaw opening feature 1160 on anvil 1130 as distal closure tube or member 1430' is moved proximally PD. The wall of the distal obturator tube or member 1430' may be cut and folded inward to allow for occlusion. FIG. 29 shows anvil 1130 in the fully open position. As distal closure member 1430' is moved proximally, primary positive jaw opening tabs 1442 cam up corresponding anvil opening ramps 1148 on anvil 1130, causing the anvil to pivot. start to open. Thereafter, during the closing process, secondary positive jaw opening tabs 1448 in distal closure member 1430' contact secondary jaw opening features 1160 formed on anvil mounting wall 1136 to force anvil 1130 into the fully open position. further assist in moving to As seen in FIG. 26, secondary positive jaw opening tabs 1448 generally follow the contour of distal obturator tube 1430'.

FIG. 30 shows an alternative distal closure member 1430' in which the secondary positive jaw opening tabs 1448 are integrally formed with the wall of the distal closure tube 1430', but the distal closure tube or the wall of the distal closure tube 1430'. Extends proximally inward to contact secondary jaw opening feature 1160 on anvil 1130 when member 1430' is moved proximally PD. FIG. 31 shows anvil 1130 in the fully open position. Accordingly, such primary and secondary anvil openings or jaw opening features open to the anvil when the distal closure member moves from a fully actuated position corresponding to a fully closed position of the anvil to a non-actuated position corresponding to a fully open position of the anvil. It can function to add motion sequentially. In such a mechanism, as the distal obturator tube 1430' is moved proximally, the primary positive jaw opening tabs 1442 cam the anvil into a "generally open" position. A secondary positive jaw opening tab 1448 functions to ensure that the anvil is moved to its fully open position when the distal closure member returns to its unactuated position.

32 and 33 illustrate an alternative secondary in which anvil mounting wall 1136 includes a proximal anvil extension 1162 that cooperates with a corresponding secondary anvil biasing spring 1164 to bias the anvil to an open position. Fig. 3 shows a positive jaw opening mechanism; As distal closure member 1430 is moved proximally, primary positive jaw opening tabs 1442 cam up to corresponding anvil opening ramps 1148 on anvil 1130 to begin pivoting the anvil open. Additionally, secondary anvil biasing spring 1164 biases proximal anvil extension 1162 to further assist in moving anvil 1130 to the fully open position. In conventional jaw opening mechanisms, there is a "lag time" between the actuation of the jaw opening system (eg, firing trigger) and the ongoing opening of the jaws. In the above example, the secondary anvil biasing spring 1164 is located proximal to the pivot axis PA about which the anvil pivots relative to the elongated channel. Such a mechanism not only increases the biasing (opening) motion to the anvil, but in other cases the initial retraction of the closure member and the closure member exerting a sufficient amount of opening motion on the anvil to force the anvil to open. It may serve to minimize the occurrence of any "death zones" that may occur between the point where movement to the open position actually begins.

34 and 35 show an alternative distal closure member 1430'' that employs a positive jaw biasing member 1450 on each of the positive jaw opening tabs 1442. FIG. The positive jaw biasing member 1450 can form a leaf spring mechanism, such as made of metal, that pushes the anvil opening ramp on the anvil 1130 as the distal closure member 1430'' is moved in the proximal direction PD. Acts to apply an additional opening force to 1148 . FIG. 34 shows anvil 1130 in a fully closed position and FIG. 35 shows anvil 1130 in a fully open position. 36 and 37 show an alternative distal closure member 1430'' that employs another form of positive jaw biasing member 1452 on each of the positive jaw opening tabs 1442. FIG. Positive jaw biasing member 1452 may have a somewhat V-shaped configuration and may be formed from spring steel or the like. FIG. 36 shows anvil 1130 in a fully closed position and FIG. 37 shows anvil 1130 in a partially open position upon initial proximal movement of distal closure member 1430″. Positive jaw biasing member 1452 functions to ensure that anvil 1130 is lifted against distal closure member 1430'' from the beginning of the opening process.

Figures 38 and 39 show an alternative distal closure member 1430'', where the positive jaw opening tabs 1442, respectively, anvil 1130 is lifted relative to the distal closure member 1430'' from the beginning of the opening process. It has a flexible portion 1454 thereon that functions to ensure that. Flexible portion 1454 may comprise rubber or similar material formed over hook portion 1444 of positive jaw opening tab 1442 . In other mechanisms, portion 1454 may not be formed from a flexible material, but instead may be formed from a hardened material to prevent wear on positive jaw opening tabs 1442 . FIG. 38 shows anvil 1130 in a fully closed position and FIG. 39 shows anvil 1130 in a partially open position. Such compliant and biasing member mechanisms bias the anvil open while the closure member cam mechanism remains in camming engagement with the cam ramps on the anvil to activate the closure system (anvil). for opening the anvil) and the actual opening of the anvil. Such a configuration may also function to establish a solid camming surface that allows the user to override the anvil jam by manipulating the closure trigger.

40-42, firing member 1670 is configured to operably interface with a sled or cam assembly 1120 operably supported within body 1151 of surgical staple cartridge 1150. As shown in FIG. Cam assembly 1120 is slidably displaceable within surgical staple cartridge body 1151 from a proximal starting position adjacent proximal end 1153 of cartridge body 1151 to an ending position adjacent distal end 1155 of cartridge body 1151 . is. Cartridge body 1151 operably supports therein a plurality of staple drivers (not shown) aligned in rows on each side of centrally located slot 1154 . A centrally located slot 1154 allows firing member 1670 to pass therethrough to sever tissue clamped between anvil 1130 and surgical staple cartridge 1150 . The drivers are associated with corresponding pockets 1156 that open through the upper deck surface 1152 of the cartridge body 1151 . The staple drivers each carry one or more surgical staples or fasteners (not shown) thereon. Thus, a plurality of surgical staples are arranged in lines or rows located on either side of slot 1154 . Cam assembly 1120 includes a plurality of angled or wedge-shaped cams 1122 , each cam 1122 corresponding to a particular line of fasteners or drivers located on the sides of slot 1154 . When firing member 1670 is fired or driven distally, firing member 1670 drives cam assembly 1120 distally as well. As firing member 1670 travels distally through surgical staple cartridge 1150, tissue cutting mechanism 1676 cuts tissue clamped between anvil 1130 and surgical staple cartridge 1150, and cam assembly 1120 moves within the cartridge. drives the driver upward, which drives the corresponding staple or fastener into contact with the anvil 1130 .

In those embodiments in which the firing member includes a tissue-cutting surface or tissue-cutting mechanism, unless an unfired or fresh staple cartridge is properly supported within elongated channel 1102 of surgical end effector 1100, the firing member may be misplaced. It may be desirable to configure the elongated shaft assembly in such a way as to prevent it from advancing forward. For example, if no staple cartridge is present and the firing member is advanced distally through the end effector, tissue will be cut but not stapled. Similarly, if a spent staple cartridge (i.e., a staple cartridge from which at least some of the staples have already been fired) is present in the end effector and the firing member is advanced, tissue may be cut. , stapling may not be perfect, if at all. It will be appreciated that the occurrence of such phenomena can lead to undesirable catastrophic results during surgical procedures.米国特許第６，９８８，６４９号、発明の名称「ＳＵＲＧＩＣＡＬ ＳＴＡＰＬＩＮＧ ＩＮＳＴＲＵＭＥＮＴ ＨＡＶＩＮＧ Ａ ＳＰＥＮＴ ＣＡＲＴＲＩＤＧＥ ＬＯＣＫＯＵＴ」、米国特許第７，０４４，３５２号、発明の名称「ＳＵＲＧＩＣＡＬ ＳＴＡＰＬＩＮＧ ＩＮＳＴＲＵＭＥＮＴ ＨＡＶＩＮＧ Ａ ＳＩＮＧＬＥ ＬＯＣＫＯＵＴ ＭＥＣＨＡＮＩＳＭ ＦＯＲ ＰＲＥＶＥＮＴＩＯＮ ＯＦ ＦＩＲＩＮＧ and U.S. Patent No. 7,380,695, entitled "SURGICAL STAPLING INSTRUMENT HAVING A SINGLE LOCKOUT MECHANISM FOR PREVENTION OF FIRING," and U.S. Patent Application No. 14/742,933, entitled "SURGICAL STAPLUGIN STRAPLUG INSTRUMENT INSTRUMENTS". WITH LOCKOUT ARRANGEMENTS FOR PREVENTING FIRING SYSTEM ACTUATION WHEN A CARTRIDGE IS SPENT OR MISSING each disclose various projectile member lockout mechanisms that may be used. Each of these references is incorporated herein by reference in its entirety.

An "unfired," "unused," "new," or "new" surgical staple cartridge 1150, as used herein, means that the surgical staple cartridge 1150 has been properly loaded into the end effector. Sometimes it means having all of its fasteners in their "fireable" positions. When in that position, the cam assembly 1120 is in its starting position. A new surgical staple cartridge 1150 seats within elongated channel 1102 and can be retained therein by a snap mechanism on the cartridge body configured to retainably engage corresponding portions of elongated channel 1102 . FIG. 41 shows a portion of surgical end effector 1100 with a new or unfired surgical staple cartridge 1150 seated therein. As seen in FIG. 41, cam assembly 1120 is in the starting position. To prevent the firing system from being actuated, more precisely, firing member 1670 is pushed farther through end effector 1100 unless an unfired or new surgical staple cartridge is properly seated within elongated channel 1102 . To prevent it from being driven laterally, the illustrated replaceable surgical tool assembly 1000 employs a firing member lockout system, generally designated as 1730, which in certain aspects is described throughout that disclosure. US patent application Ser. can be similar to the lockout system disclosed in .

In the illustrated example, firing member lockout system 1730 is configured to retainably engage firing member 1670 when an unused or unfired surgical staple cartridge 1150 is not properly seated within elongated channel 1102. Includes a configured movable locking member 1732 . Locking member 1732 comprises a pair of lateral spring arms 1733 interconnected by a central mounting tab mechanism 1734 . As seen in FIG. 41, the lateral spring arms 1733 are each laterally offset from the shaft axis SA. When locking member 1732 is installed, mounting tab mechanism 1734 is configured to bias locking member 1732 upward. Additionally, locking member 1732 is angled upwardly to engage the bottom surface of a corresponding anvil mounting wall 1136 on anvil mounting portion 1134 to bias locking member 1732 downward when anvil 1130 is closed. includes two lateral anvil spring arms 1736 forming The distal portion of each lateral spring arm 1733 terminates in a threaded tab 1738 each further laterally offset from the shaft axis SA. Sled tabs 1738 are each oriented to contact a corresponding unlocking mechanism or sled boss 1124 formed on proximal end portion 1121 of cam assembly 1120 . As seen in FIG. 40, for example, in the mechanism shown, cam assembly 1120 has a central axis CA. When sled assembly 1120 is in its starting position within an unfired staple cartridge properly supported within the elongated channel, central axis CA is laterally aligned with shaft axis SA. As seen in FIG. 40, the thread bosses are laterally offset from the central axis CA (and ultimately the shaft axis SA) to define a central region 1123 therebetween. As the firing member is advanced distally through the end effector, the firing member contacts cam assembly 1120 in the central region and drives cam assembly 1120 distally through the cartridge body. In an alternative mechanism, only one lateral spring arm 1733 may be used, thus only one lateral sled tab 1738 is provided. In such a mechanism, only one corresponding sled boss 1124 is formed on cam assembly 1120 . In yet another mechanism, locking member 1732 may have two lateral spring arms 1733 , but only one of the lateral spring arms may have thread tab 1738 . In the illustrated arrangement, the proximally facing thread bosses 1124 each have a sled boss 1124 for facilitating easier interface between the thread bosses 1124 and the lateral thread tabs 1738 during installation of the cartridge within the elongated channel. Includes ramp 1127 .

Lateral spring arms 1733 each include a locking notch therein configured for locking engagement with a corresponding central locking lug 1674 extending laterally from firing member body portion 1672 . 41 shows cam assembly 1120 in a starting position with threaded boss 1124 lifting locking member 1732 out of locking engagement with locking lug 1674. FIG. FIG. 42 shows an improper surgical staple cartridge 1150W installed in relation to locking member 1732. FIG. As seen in FIG. 42, cartridge 1150W has a cam assembly 1120W with a proximally extending feature 1124W that is laterally offset from the central axis of the cam assembly, wherein feature 1124W: Locking member 1732 is not in unlocked engagement with sled tab 1738 . Thus, cam assembly 1120W does not move locking member 1732 out of locking engagement with firing member 1670, even in its starting position.

In an alternative mechanism, the locking member, when depressed into contact with a corresponding portion of the sled of a properly loaded unfired cartridge (when the sled is in its proper firing position), completes the electrical circuit. may be configured to In such a mechanism, for example, the motor is inoperable when the circuit is open. In one mechanism, the locking member can also mechanically engage the firing member in the manner described above, thereby facilitating both mechanical and electrical lockout mechanisms/functions.

43-50 illustrate another firing member lockout system 1740 that may be used in connection with various end effector embodiments disclosed herein. In this embodiment, firing member lockout system 1740 provides a locked position in which firing member lock 1742 is in locking engagement with firing member 1670 and firing member 1670 is free to move distally through surgical staple cartridge 1150. It includes a firing member lock 1742 supported for pivotal movement between an advanced unlocked position. As seen in FIG. 43, firing member lock 1742 includes a mounting portion 1743 having pivot members 1744 projecting laterally from each side thereof. Pivot member 1744 is pivotally captured within pivot notch 1238 provided on the underside of end effector mounting assembly 1230 . See FIG. As seen in FIG. 44, pivot member 1744 is rotatably captured within pivot notch 1238 by lower dual pivot link 1222 . As further seen in FIG. 43, a pair of hook arms 1746 extend distally from mounting portion 1743 . Each hook arm 1746 includes a locking notch 1748 formed in its underside configured to engage a corresponding one of central locking lugs 1674 on firing member 1670 . Firing member lockout system 1740 includes a pair of biasing members in the form of leaf springs or the like that engage corresponding anvil mounting walls 1136 on anvil 1130 and firing member lock 1742 to bias firing member lock 1742 downward. 1749 is further included.

FIG. 45 shows surgical end effector 1100 with anvil 1130 and elongated channel 1102 in a fully open position during loading of an unused or unfired surgical staple cartridge 1150 therein. When in the open position, firing member 1670 cannot be advanced distally due to misalignment of at least portions of the firing member and corresponding passages in anvil 1130 . Additionally, the instrument is configured to detect the position of the anvil and/or the configuration of other portions of the anvil closure system to prevent activation of the firing system components unless the anvil is in the fully closed position. Various sensor mechanisms can be employed. When in the open position, as seen in FIG. 45, the hook arms 1746 are oriented in an unactuated position, where a portion of each of the hook arms 1746 is received on a corresponding central locking lug 1674 of the firing member 1670; As a result, locking notches 1748 are not in a position to engage corresponding central locking lugs 1674 .

FIG. 46 shows the end effector after an unfired surgical staple cartridge 1150 with sled or cam assembly 1120 is properly installed within elongated channel 1102 and anvil 1130 is closed. When in such configuration, biasing member 1749 exerts a downward biasing motion on firing member lock 1742 , where firing member lock 1742 engages sled boss 1124 and central locking lug 1674 on firing member 1670 . in contact. As further seen in FIG. 46, sled boss 1124 on sled assembly 1120 lifts firing member lock 1742 upward, thereby engaging locking notch 148 therein into locking engagement with central locking lug 1674 on firing member 1670 . It plays a role of removing from the match. Firing member 1670 is thus free to advance distally, as shown in FIG. 47, firing member lock 1742 is out of engagement with firing member 1670 and sled assembly 1120, and biasing member 1749 has caused firing member lock 1742 to pivot downward.

48-50 illustrate retraction of firing member 1670. FIG. FIG. 48 shows the position of firing member 1670 and firing member lock 1742 at the beginning of the retraction process. 49 shows the firing member after tapered proximal end 1675 of central locking lug 1674 has contacted an angled surface on the distal end of hook arm 1746, causing hook arm 1746 to pivot upward (arrow U). 1670 position. FIG. 50 shows firing member 1670 in its fully retracted or starting position. As seen in FIG. 50, hook arm 1746 has pivoted downward to the "pre-locked" position. When the locking member is in the pre-locked position, the firing member 1670 locks with hook harms 1746 on which a central locking lug 1674 serves to prevent further distal advancement of the firing member 1670 . It can be moved distally until it engages. Thus, in the illustrated example, the firing member lock 1742 is not moved from the unlocked or non-actuated position to the actuated position unless the anvil is first moved to the closed position. In this context, the term "closed position" means that the anvil can advance the firing member distally relative to the cartridge and firing member otherwise, e.g. is moved to a position where it cannot be advanced distally.

51-55 illustrate another firing member lockout system 1750 that may be used in connection with various end effector embodiments disclosed herein. In this embodiment, firing member lockout system 1750 includes at least one firing member lock 1752 supported for vertical movement along lock axis LA transverse to shaft axis SA. In one example, firing member locks 1752 correspond to each of anvil mounting walls 1136 . In other examples, only one firing member lock 1752 may be used. For clarity, only one firing member lock 1752 is shown in the figures. In the illustrated example, each firing member lock 1752 has an L-shape and a latch portion 1754 . Firing member locks 1752 are movably journalled on corresponding mounting rods 1751 attached to corresponding anvil mounting walls 1136 or other portions of the anvil. A corresponding locking spring or biasing member 1756 biases the firing member lock 1752 downward (arrow D in FIGS. 52 and 53). FIG. 51 shows surgical end effector 1100 with anvil 1130 and elongated channel 1102 in their fully closed positions and an unused or unfired surgical staple cartridge 1150 properly supported therein. As seen in FIG. 51, each tapered end 1755 of latch portion 1754 is engaged by a corresponding unlocking mechanism 1125 on sled assembly 1120 . The unlocking mechanism 1125 serves to vertically offset the latch portion 1754 so that the central locking lug 1674 on the firing member 1670 can pass thereunder. Thus, firing member 1670 is free to advance distally. FIG. 52 shows the position of firing member 1670 at the beginning of the firing process, with firing member 1670 advanced distally from its starting position. As seen in FIG. 52, unlocking mechanism 1125 is no longer in contact with latch portion 1754 .

53-55 illustrate retraction of firing member 1670. FIG. FIG. 53 shows the position of firing member 1670 and firing member lock 1752 at the beginning of the retraction process. 54 shows that the tapered proximal end 1675 of the central locking lug 1674 has contacted the angled surface or tapered end 1755 of the latch portion 1754 to offset the firing member lock 1752 vertically upward (FIGS. 54 and 55). Arrow U) indicates the position of firing member 1670 after. FIG. 55 shows firing member 1670 in its fully retracted or starting position. As seen in FIG. 55, firing member lock 1752 is in a locked or bottom position, and when firing member 1670 is moved distally, central locking lug 1674 on firing member 1670 engages the corresponding firing member. It contacts latch portion 1754 of member lock 1752 . When in that position, firing member 1670 cannot be advanced distally. Because the firing member lock 1752 is attached to the anvil, when the anvil is in the open position, the firing member lock 1752 is not in the locked position and can prevent axial advancement of the firing member 1670 . Therefore, to activate firing member lockout system 1750, anvil 1130 must first be moved to the closed position. In this context, the term "closed position" means that the anvil can advance the firing member distally relative to the cartridge and firing member otherwise, e.g. is moved to a position where it cannot be advanced distally.

56-63 show another firing member including a movable locking member 1762 configured to retainably engage firing member 1670 when surgical staple cartridge 1150 is not properly seated within elongated channel 1102. A lockout system 1760 is shown. Locking member 1762 is configured to retainably engage a corresponding portion of the firing member when sled assembly 1120 is not within surgical staple cartridge 1150 in its starting position. A moving locking portion 1764 is provided. In the illustrated mechanism, locking member 1762 employs two laterally moving locking portions 1764 , each locking portion 1764 engaging a laterally extending portion of firing member 1670 .

In the illustrated embodiment, the locking member 1762 comprises a generally U-shaped spring member with each laterally movable leg or locking portion 1764 extending from a central spring portion 1763 and shown in FIGS. It is configured for lateral movement represented by the arrow “L” in 62 . It will be understood that the term "lateral" refers to a direction transverse to the shaft axis SA. Spring or locking member 1762 may be made from high strength spring steel or similar material. Central spring portion 1763 may include proximally extending spring tabs 1767 retained within notches 1240 in end effector mounting assembly 1230 . See FIG. In the illustrated example, spring tab 1767 functions to bias locking member 1762 to the unlocked configuration when anvil 1130 is in the open position. FIG. 57 shows anvil 1130 in an open position ready for an unfired or new cartridge to be installed within elongated channel 1102 . As seen in FIG. 57, mounting tab 1767 biases locking member 1762 in an upward direction (arrow U). When in its unlocked position, locking member 1762 is not in a position to prevent distal advancement of firing member 1762 . However, the instrument may use other sensors and lockout mechanisms to detect the position of the anvil and otherwise prevent activation of the firing system unless the anvil has been moved to the closed position.

FIG. 58 shows a portion of surgical end effector 1100 after an unfired staple cartridge 1150 has been loaded or otherwise properly supported within elongated channel 1102 and anvil 1130 has been moved to a closed position. . When anvil 1130 is moved to the closed position, anvil mounting wall 1136 contacts a corresponding laterally extending anvil tab 1766 formed on locking member 1762 . See FIG. Anvil mounting wall 1136 thereby serves to move locking member 1762 from the disengaged position to the locked position, where locking member 1762 is in locking engagement with firing member 1670 . In one embodiment, each laterally movable leg or locking portion 1764 of locking member 1762 includes a locking window 1768 therein. When locking member 1762 is in the locked position, central locking lugs 1674 on each side of firing member 1670 extend into corresponding locking windows 1768 to facilitate axial distal advancement of firing member 1670 . prevent reservatively.

As seen in FIG. 56, sled or cam assembly 1120 includes unlocking mechanisms 1125 corresponding to each of laterally movable locking portions 1764 . In the illustrated mechanism, an unlocking mechanism 1125 is provided on or extends proximally from each of the central wedge-shaped cams 1122 . In an alternative mechanism, unlocking mechanism 1125 may comprise a corresponding proximal projection of wedge-shaped cam 1122 . As seen in FIG. 59, when the sled assembly 1120 is in its starting position, the unlocking mechanism 1125 engages the corresponding locking portion 1764 to accommodate a direction (arrow L) transverse to the shaft axis SA. biases locking portion 1764 laterally; Central locking lugs 1674 are not retainingly engaged with their corresponding locking windows 1768 when locking portions 1764 are in their unlocked orientations. When in these orientations, firing member 1670 can be axially advanced (fired) distally. However, if an unfired surgical staple cartridge 1150 is not within elongated channel 1102, or if sled assembly 1120 is moved out of its starting position (which indicates that the cartridge has been at least partially or fully fired). ), locking portion 1764 springs laterally into retaining engagement with firing member 1670 . When in the position shown in FIG. 58, central locking lugs 1674 are received within their corresponding locking windows 1768 and prevented from moving distally by lockout stop 1769 . When in such position, firing member 1670 cannot move distally.

FIG. 61 shows firing member 1670 as it is retracted to its starting or unfired position. When the tapered or tapered proximal end 1675 of the central locking lug 1674 contacts the radiused distal end 1765 of the movable locking portion 1764, the movable locking portion 1764 moves toward the central locking lug as shown in FIG. Each of 1674 is biased laterally outward until it is again fully received within locking window portion 1768 of locking portion 1764 (FIG. 63). Once firing member 1670 has been fully retracted to the starting position shown in FIG. 63, firing member 1670 is relocked in place by locking member 1762 and another new cartridge is properly inserted into elongated channel 1102 as described above. is prevented from advancing distally until it is loaded. When anvil 1130 is released, spring tab 1767 rebiases locking member 1762 back to the unlocked or pre-actuated position. Thus, to activate firing member lockout system 1760, the user must first move the anvil to the closed position. In this context, the term "closed position" means that the anvil can advance the firing member distally relative to the cartridge and firing member otherwise, e.g. is moved to a position where it cannot be advanced distally.

64-70 show an alternative articulation locking mechanism 1910 for locking surgical end effector 1100' in an articulated position about articulation axis BB with respect to shaft axis SA. In the illustrated example, surgical end effector 1100' is pivotally coupled to spine assembly 1500'. Spine assembly 1500' may be attached to chassis 1800 (FIG. 4) in the manner described above. A distal end portion 1540 of spine assembly 1500' is formed with a downwardly projecting articulation pin 1542 that defines an articulation axis BB. Articulation pin 1542 is configured to be rotatably or pivotally received within spine mounting hole 1254 provided in mounting base 1252 of end effector mounting assembly 1250 . End effector mounting assembly 1250 extends through lateral mounting hole 1251 of mounting assembly 1250 and is received within channel mounting hole 1106 ( FIG. 6 ) provided within proximal end 1103 of elongated channel 1102 . It is attached to the proximal end 1103 of the elongate channel 1102 by a spring pin connector 1235 (FIG. 6).

64 and 65, in one embodiment, articulation locking mechanism 1910 defines a central pinhole 1924 and includes a central spring body portion including lower release ring segments 1930 and 1932 and upper release ring segments 1940 and 1942. A locking spring assembly 1920 including 1922 is provided. Lock spring assembly 1920 is sized to be rotatably received within spine mounting hole 1254 of mounting base 1252 . In one embodiment, upper release stop 1256 and lower release stop 1258 each project inwardly into spine mounting hole 1254 . Joint locking mechanism 1910 further includes a release pin assembly 1950 that includes an upper release arm 1952 and a lower release arm 1954 . Release pin assembly 1950 is attached to distal articulation link 1960 pinned to the distal end of distal articulation link 1710 ′ by link pin 1962 . The distal articulation link 1710' can be articulated as described herein to axially move the distal articulation link 1710' distally and proximally depending on the desired direction of articulation. Can interface with exercise system. A bottom portion (not shown) of release pin assembly 1950 is configured to be pivotally and slidably supported within lower arcuate release pin slot 1260 formed in end effector mounting assembly 1250 . A second upper release arm slot 1270 is also formed in the end effector mounting assembly and is configured to movably receive upper and lower release arms 1952 and 1954 . As seen in FIG. 67, upper balance formation 1272 projects into second upper release arm slot 1270 and is configured to operably interface with upper release arm 1952 . Similarly, lower balance formation 1274 projects into second upper release arm slot 1270 and is configured to operably interface with lower release arm 1954 .

In the illustrated example, articulation pin 1542 is rotatably received within central pinhole 1924 of lock spring assembly 1920 . Lock spring assembly 1920 has upper release stop 1256 received within upper locking space 1941 formed between upper release ring segments 1940 and 1942 and lower release stop 1258 between lower release ring segments 1930 and 1932. It is received within the spine mounting hole 1254 of the end effector mounting assembly 1250 so as to lie within the lower locking space 1931 formed therebetween. FIG. 67 shows surgical end effector 1100 in a non-articulated position. As seen in FIG. 67, the upper release stop 1256 is in abutting engagement with the upper release ring segment 1940 . The lower release stop 1258 can also abuttingly engage the lower release ring segment 1932 . Such a configuration retains locking spring assembly 1920 in frictional engagement with articulation pin 1542 to retain surgical end effector 1100 in the non-articulated position.

FIG. 68 is a top view of articulation locking mechanism 1910 as the surgical end effector begins to articulate to the right (arrow RD) about the articulation axis. As seen in FIG. 68, the right articulation process is initiated by axially advancing distal articulation link 1710' in distal direction DD. Distal advancement of distal articulation link 1710 ′ causes distal articulation link 1960 to move release pin assembly 1950 distally, thereby causing upper release arm 1952 to engage end effector mounting assembly 1250 . It is brought into abutting engagement with upper upper balance formation 1272 . Such contact between upper balance formation 1272 and upper release arm 1952 causes upper release arm 1952 to contact upper release ring segment 1942 and apply right articulation force RAF. Such movement causes upper release ring segment 1942 to move counterclockwise CCW, thereby opening or expanding lock spring assembly 1920 and disengaging it from frictional engagement with articulation pin 1542 . 69 is a bottom view of the joint locking mechanism 1910 shown in FIG. 68. FIG. As seen in FIG. 69, lower release stop 1258 abuts engagement with lower release ring segment 1930, thereby preventing lower release ring segment 1930 from moving. As a result, locking spring assembly 1920 expands to release articulation pin 1542 . Further distal advancement of distal articulation link 1710 ′ causes release pin assembly 1950 to apply articulation to surgical end effector mounting assembly 1250 in the right direction RD while simultaneously moving locking spring assembly 1920 . Release from locking engagement with articulation pin 1542 . See FIG. As distal articulation link 1710' is moved proximally to articulate surgical end effector 1100 leftward, this causes the release pin assembly to expand locking spring assembly 1920, thereby locking the surgical end. Effector mounting assembly 1250 is moved leftward in a similar but opposite manner. Thus, as can be understood from the foregoing description, the lock spring assembly is configured in a first locked or retained configuration in which lock spring assembly 1920 frictionally engages articulation pin 1542 and articulation is applied. Once installed, locking spring assembly 1920 essentially comprises a spring assembly expandable from a second unlocked position in which surgical end effector mounting assembly 1250 is free to pivot about articulation pin 1542 .

71-77 show an alternative articulation locking mechanism 2010 for locking surgical end effector 1100 in an articulated position about articulation axis BB with respect to shaft axis SA. In the illustrated example, surgical end effector 1100 is pivotally coupled to spine assembly 1500'. Spine assembly 1500' may be attached to chassis 1800 (FIG. 4) in the manner described above. A distal end portion 1540 of spine assembly 1500' is formed with a downwardly projecting articulation pin 1542 that defines an articulation axis BB. Articulation pin 1542 is configured to be rotatably or pivotally received within spine mounting hole 1254 provided in mounting base 1252' of end effector mounting assembly 1250'. End effector mounting assembly 1250 ′ extends through lateral mounting hole 1251 of mounting assembly 1250 ′ and is received within channel mounting hole 1106 ( FIG. 6 ) provided within proximal end 1103 of elongated channel 1102 . It is attached to the proximal end 1103 of the elongated channel 1102 by a spring pin connector 1235 (FIG. 6) that is attached to the elongated channel 1102 .

71 and 73, in one embodiment, the articulation locking mechanism 2010 includes a ball retainer base 2022 having a central pivot hole 2024 therein configured to receive the articulation pin 1542 therethrough. , with a ball lock assembly 2020 . Ball retainer base 2022 is attached to articulation locking link 1960 by articulation pins 2023 and articulation flexion pins 2023 pass through pin holes 2025 in ball retainer base 2022 to mount base 1252' of surgical end effector mounting assembly 1250'. , extends into the articulation slot 1264 of the . Articulation locking link 1960 is pinned to the distal end of distal articulation link 1710 ′ by link pin 1962 . The distal articulation link 1710' can be articulated as described herein to axially move the distal articulation link 1710' distally and proximally depending on the desired direction of articulation. Can interface with exercise system. Ball retainer base 2022 has a distal locking surface 1263 formed on locking cradle 1262 on surgical end effector mounting assembly 1250' and a proximal locking surface formed on distal end portion 1540 of spine assembly 1500'. Also included are two upstanding ball stop members 2026 and 2028 which serve to retain two locking balls 2030 and 2032 between 1541 and 1541 . Ball retainer base 2022 further includes two centering springs 2034 and 2036 that also function to support locking balls 2030, 2032, respectively.

FIG. 73 shows surgical end effector 1100 in a non-articulated position. 73, locking balls 2030, 2032 lock between distal locking surface 1263 on locking cradle 1262 and proximal locking surface 1541 on distal end portion 1540 of spine assembly 1500'. It is captured in mating state to hold surgical end effector 1100 in a non-articulated position. 74 shows locking plane LP extending through the contact points between locking ball 2030 and distal locking surface 1263 and proximal locking surface 1541 on locking cradle 1262. FIG. FIG. 75 is a top view of articulation locking mechanism 2010 as the surgical end effector begins to articulate to the right (arrow RD) about the articulation axis. As seen in FIG. 75, the right articulation process is initiated by axially advancing distal articulation link 1710' in distal direction DD. Distal advancement of distal articulation link 1710' causes articulation locking link 1960 to move articulation pin 2023 distally within articulation slot 1264 in mounting base 1252' of end effector mounting assembly 1250'. It is moved, and at the same time a releasing load RL is applied to the ball retainer base 2022 . Movement of ball retainer base 2022 in the right direction RD causes ball stop 2026 to move locking ball 2032 out of locking engagement with distal locking surface 1263 on locking cradle 1262 . Ball stop 2026 initially moved out of engagement with locking ball 2030 , which temporarily engaged distal locking surface 1263 and proximal locking surface 1541 on locking cradle 1262 . remains. Further distal advancement of distal articulation link 1710' causes articulation pin 2023 to apply articulation to surgical end effector mounting assembly 1250' in the right direction RD while simultaneously moving ball retainer base 2022 to the right. Move to RD. Joint angle AA represents the amount of joint motion experienced by surgical end effector 1100 . As ball retainer base 2022 moves rightward RD, locking ball 2030 also moves out of locking engagement with distal locking surface 1263 and proximal locking surface 1541 . Ball stop 2028 also holds locking ball 2032 out of locking engagement with distal locking surface 1263 and proximal locking surface 1541 during articulation. Once surgical end effector 1100 has been articulated to the desired position, distal advancement of distal articulation link 1710' is discontinued. Centering springs 2034 and 2036 then bias locking balls 2030 and 2032 into locking engagement with distal locking surface 1263 and proximal locking surface 1541 to retain surgical end effector 1100 in the articulated position. As seen in FIG. 76, the centering spring biases locking balls 2030, 2032 into retaining engagement with distal locking surface 1263 and proximal locking surface 1541 when in the locked articulated position. The action also causes articulation pin 2023 to move to a neutral position within articulation slot 1264 . To articulate surgical end effector 1100 leftward, distal articulation link 1710' is moved proximally, which pivots ball lock assembly 2020 and surgical end effector 1100 leftward. , works in a similar way.

78-82 show an alternative articulation locking mechanism 2110 for locking surgical end effector 1100 in an articulated position about articulation axis BB with respect to shaft axis SA. In the illustrated example, surgical end effector 1100 is pivotally coupled to spine assembly 1500''. Spine assembly 1500'' may be attached to chassis 1800 (FIG. 4) in the manner described above. A distal end portion 1540' of spine assembly 1500'' includes a pivot hole 1543 that defines an articulation axis BB. The end effector mounting assembly 1250'' extends through a lateral mounting hole 1251 of the mounting assembly 1250'' and within a channel mounting hole 1106 (FIG. 6) provided within the proximal end 1103 of the elongated channel 1102. It is attached to the proximal end 1103 of the elongate channel 1102 by a spring pin connector 1235 (FIGS. 80-82) that is received in the channel. In the illustrated embodiment, the surgical end effector mounting assembly 1250'' extends upwardly from the mounting base 1252 and has a tapered mounting column 1253 received within the pivot hole 1543 of the spine assembly 1500''. include. In one mechanism, tapered mounting column 1253 tapers away from mounting base 1252 . In other words, the cross-sectional area of end 1255 of tapered mounting column 1253 is less than the cross-sectional area of the portion of tapered mounting column 1253 adjacent mounting base 1252 .

Articulation locking mechanism 2110 comprises at least one locking member or shoe movably supported between mounting column 1253 and inner wall 1545 of pivot hole 1543 . In the illustrated arrangement, the mounting column 1253 has a triangular cross-sectional shape that defines three column sides 1280,1282,1284. Thus, three locking members or shoes 2112, 2114, 2116 (in the example shown) are employed, with locking shoe 2112 positioned adjacent column wall 1282 and locking shoe 2114 adjacent column wall 1284. with the lock shoe 2116 positioned adjacent to the column wall 1280 . Mounting columns with other shapes and numbers of locking shoes can also be used. Lock shoes 2112, 2114, 2116 are each received on corrugated washers 2120 mounted on mounting base 1252 of end effector mounting assembly 1250''. The illustrated mechanism includes a proximal closure member 2410 that can be axially advanced and retracted in various ways described herein with respect to proximal closure member 1410, for example. Proximal closure member 2410 is pivotally coupled to distal closure member 2430 which is similar in structure and operation to distal closure member 1430 . As seen in FIGS. 80-82, distal closure member 2430 is connected to proximal closure member 2410 by upper dual pivot link 1220 and lower dual pivot link 1222'. In one embodiment, the lower dual pivot link 1222' is formed with a tapered ramp surface 1226 on its upper surface 1224. As shown in FIG. See FIG. The illustrated mechanism uses two articulation links 1710 R and 1710 L to apply left and right articulation to surgical end effector 1100 . See FIG. To articulate surgical end effector 1100 to the right, articulation link 1710R is axially retracted in proximal direction PD and articulation link 1710L is axially advanced in distal direction DD. Conversely, to articulate surgical end effector 1100 leftward, articulation link 1710L is axially retracted in proximal direction PD and articulation link 1710R is axially advanced in distal direction DD. . Articulation control motion may be generated and applied to the articulation links 1710R, 1710L by various known articulation system mechanisms and other articulation system mechanisms disclosed herein. Articulation link 1710R has a slotted end portion 1711R received on right articulation pin 1266R attached to end effector mounting assembly 1250''. Similarly, articulation link 1710L has a slotted end portion 1711L received on left articulation pin 1266L attached to end effector mounting assembly 1250''.

Referring now to FIG. 80, in the illustrated mechanism, a corrugated washer 2120 biases the mounting base 1252 of the end effector mounting assembly 1250'' downward (arrow D) when the closure system is in a non-actuated state. . In FIG. 80, proximal closure member 2410 is in the proximal position. Similarly, lower double pivot link 1222' is also in a proximal position allowing mounting base 1252 to be driven downward. Because mounting base 1252 is in its lowest or unlocked position, tapered mounting column 1253 is removed from locking shoes 2112, 2114, 2114, 2114, and 1540' from retaining engagement with distal end portion 1540' of spine assembly 1500''. 2116 is released (first unlocked position). Thus, when in that position, surgical end effector 1100 can be articulated about articulation axis BB by articulation links 1710R, 1710L. Once surgical end effector 1100 has been articulated to the desired position, articulation locking mechanism 2110 can be reactivated by advancing proximal closure member 2410 distally.

Figure 81 shows the beginning of the locking process. As can be seen in this figure, the proximal closure member 2410 and the lower double pivot link 1222' are first moved in the distal direction DD. As the lower dual pivot link 1222 ′ moves distally, the ramped surface 1226 thereon drives the mounting base 1252 of the end effector mounting assembly 1250 ″ upward to collapse the wave washer 2120 . As the mounting base 1252 moves upward (arrow U), the tapered mounting column 1253 moves the lock shoes 2112, 2114, 2116 from the first unlocked position to the distal end portion 1540' of the spine assembly 1500''. ' (second locked position) to lock surgical end effector 1100 in the articulated position. This locking of surgical end effector 1100 occurs before the jaws of the surgical end effector are fully closed. FIG. 82 shows the position of the proximal closure member 2410, the lower double pivot link 1222', and the articulation locking mechanism 2110 when the closure system components have been moved to the fully closed position with the end effector fully closed. show. Accordingly, the joint locking mechanism 2110 can be actuated or moved between locked and unlocked states by a small actuation of the closure system. An alternative mechanism is envisioned in which the mounting column is attached to the distal end of the spine assembly and the pivot hole is provided in the proximal portion of the surgical end effector.

83 and 84 show an alternative articulation locking mechanism 2110' for locking surgical end effector 1100 in an articulated position about articulation axis BB with respect to shaft axis SA. In the illustrated example, surgical end effector 1100 is pivotally coupled to spine assembly 1500''. Spine assembly 1500'' may be attached to chassis 1800 (FIG. 4) in the manner described above. A distal end portion 1540' of spine assembly 1500'' includes a pivot hole 1543 that defines an articulation axis BB. End effector mounting assembly 1250'' extends through lateral mounting hole 1251 of mounting assembly 1250'' and into channel mounting hole 1106 (FIG. 6) provided in proximal end 1103 of elongated channel 1102. It is attached to the proximal end 1103 of the elongated channel 1102 by a received spring pin connector 1235 (FIG. 6). Surgical end effector mounting assembly 1250'' extends upwardly from mounting base 1252 and includes mounting column 1253' received within pivot hole 1543 of spine assembly 1500''. In this embodiment, the mounting column 1253' may not be tapered.

This embodiment also includes a plurality of lock shoes 2112', 2114', 2116' each fabricated from an electroactivated polymeric material (EAP). Such materials can expand, for example, when electrically excited. For example, electrical current may be applied to one or more of locking shoes 2112', 2114', 2116' by conductors (not shown) extending from a housing or handle mechanism, robotic control system, or the like. Accordingly, once surgical end effector 1100 is articulated to a desired position, one or more of locking shoes 2112', 2114', 2116' are expanded by applying electrical current thereto. be. In other mechanisms, one or more of the locking shoes 2112', 2114', 2116' may be configured to be pneumatically or hydraulically inflated. In other mechanisms, locking shoes 2112', 2114', 2116' may not be expandable. In such a mechanism, mounting column 1253 may be fabricated from EAP and selectively expandable by applying electrical current thereto. In other mechanisms, the mounting column 1253 may be selectively pneumatically or hydraulically expandable.

85-89 show an alternative articulation locking mechanism 2210 for locking surgical end effector 1100 in an articulated position about articulation axis BB with respect to shaft axis SA. In the illustrated example, surgical end effector 1100 is pivotally coupled to spine assembly 1500'. Spine assembly 1500' may be attached to chassis 1800 (FIG. 4) in the manner described above. A distal end portion 1540 of the upper portion 1539 of the spine assembly 1500' is formed with a downwardly projecting articulation pin 1542 that defines an articulation axis BB. Articulation pin 1542 is configured to be rotatably or pivotally received within spine mounting hole 1254 provided in mounting base 1252 of end effector mounting assembly 1250''. End effector mounting assembly 1250'' extends through lateral mounting hole 1251 of mounting assembly 1250'' and into channel mounting hole 1106 (FIG. 6) provided at proximal end 1103 of elongated channel 1102. It is attached to the proximal end 1103 of the elongated channel 1102 by a received spring pin connector 1235 (FIG. 6).

85, the illustrated mechanism uses two articulation links 1710R' and 1710L' to apply left and right articulations to surgical end effector 1100. As shown in FIG. However, in other embodiments, only one articulation link may be used. In the illustrated mechanism, articulation link 1710R' is axially retracted in proximal direction PD and articulation link 1710L' is axially retracted in distal direction DD to articulate surgical end effector 1100 to the right. is advanced to Conversely, to articulate surgical end effector 1100 leftward, articulation link 1710L' is axially retracted in proximal direction PD and articulation link 1710R' is axially advanced in distal direction DD. be done. Articulation link 1710R' has a slotted end portion 1711R received on right articulation pin 1266R attached to end effector mounting assembly 1250''. Similarly, articulation link 1710L' has a slotted end portion 1711L received on left articulation pin 1266L attached to end effector mounting assembly 1250''.

85, the articulation locking mechanism 2210 in the illustrated embodiment includes a locking assembly 2220 that includes a distal end 2222 having a right locking member or fork 2224 and a left locking member or fork 2228 projecting therefrom. Right locking member 2224 includes a right locking gear rack 2226 laterally adjacent to and in facing relationship with a corresponding right articulation gear rack 1720 formed on a downwardly extending portion of right articulation link 1710R'. Similarly, left locking member 2228 is laterally adjacent to and in facing relationship with a corresponding left articulation gear rack 1723 formed on downwardly extending portion 1722 of left articulation link 1710L'. 2230 included. In the non-actuated state, right locking member 2224 and left locking member 2228 are centered between and out of engagement with right articulation link 1710R' and left articulation link 1710L'. As further seen in FIG. 85, locking assembly 2220 is supported between lower distal spine portion 1550 and upper spine portion 1539 . Lower distal spine portion 1550 extends through mounting hole 2223 in distal end 2222 of locking assembly 2220 and is received within distal boss 1544 formed on the underside of upper spine portion 1539 . It includes an extending distal support pin 1554 . See FIG. Lower distal spine portion 1550 extends between right locking member 2224 and left locking member 2228 through locking opening 2225 and into proximal boss 1546 formed on the underside of upper spine portion 1539 . Further includes a received upwardly extending proximal support pin 1556 .

In the illustrated mechanism, the articulation locking mechanism 2210 also includes an axially moveable locking bar assembly 2240 that operatively interfaces with an articulation transmitter 2250 operably supported within the shaft assembly 1400'. Locking bar assembly 2240 includes locking wedge 2244 formed on distal end 2242 thereof. Articulation transmitter 2250 is configured to operably interface with distal firing bar 1620 operably supported within shaft assembly 1400'. In this context, distal firing bar 1620 may comprise a firing actuator.

85-87, in the illustrated mechanism, one form of articulation transmitter 2250 is formed on a portion of distal firing bar 1620 and attached to shifter drive rack 2254 formed on shifter 2252. A firing rack 1624 is included that is configured to operatively engage. A proximal end 2253 of shifter 2252 is configured to operably interface with lock bar coupler 2246 formed on lock bar assembly 2240 . As further seen in FIGS. 85-87, shifter 2252 further includes shifter driven rack 2256 in meshing engagement with articulation pinion gear 2262 attached to articulation sprocket gear 2260 . Articulation sprocket gear 2260 is rotatably supported within shaft assembly 1400' and is in meshing engagement with right meshing engagement drive rack 1724 formed on or attached to right distal articulation link 1710R'. , but also in meshing engagement with a left articulation drive rack 1726 formed on or otherwise attached to the left distal articulation link 1710L'.

The operation of articulation transmitter 2250 and articulation locking mechanism 2210 will now be described with reference to Figures 87-89. FIG. 87 shows surgical end effector 1100 in a non-articulated position. Locking bar assembly 2240 is in its distal-most “unlocked position” with locking wedge 2244 received within locking opening 2225 located between right locking member 2224 and left locking member 2228 . . Right and left locking members 2224, 2228 are in their non-actuated state and are not engaged with right and left articulation links 1710R', 1710L'. Thus, the right locking gear rack 2226 on the right locking member 2224 is out of engagement with the right articulation gear rack 1720 on the right distal articulation link 1710R' and the left locking gear rack 2230 is on the left distal articulation link. It is out of meshing engagement with the left articulation gear rack 1723 on 1710L'. Accordingly, the joint locking mechanism 2210 is in the "unlocked" configuration. However, friction between various components may prevent surgical end effector 1100 from flopping or rotating about articulation axis BB.

Figure 88 shows the beginning of the articulation process. As seen in FIG. 88, proximal end 2253 of shifter 2252 is operatively engaged with lock bar coupler 2246 and lock bar assembly 2240 is in an unlocked orientation. When shifter 2252 is thus engaged with locking bar assembly 2240 , shifter drive rack 2254 is in mating engagement with firing rack 1624 on distal firing bar 1620 . The articulation process is then initiated by axially moving distal firing bar 1620 . In the example shown in FIG. 88, the end effector 1100 is articulated about the articulation axis in the right direction RD by axially moving the distal firing bar 1620 in the proximal direction PD. Axial actuation of distal firing bar 1620 proximally and distally has been discussed in detail herein. Lock bar coupler 2246 holds shifter drive rack 2254 in mating engagement with firing rack 1624 on distal firing bar 1620 such that shifter 2252 moves proximally with distal firing bar 1620. . Movement of shifter 2252 in the proximal direction PD due to meshing engagement between shifter driven rack 2256 and articulation pinion gear 2262 causes articulation pinion gear 2262 and articulation sprocket gear 2260 to rotate clockwise through articulation actuation angle AAA. rotate in the direction As the articulation sprocket gear 2260 rotates, the right distal articulation link 1710R' is driven in the proximal direction PD and the left distal articulation link 1710L' is driven in the distal direction DD, thereby ultimately driving the surgical sprocket. The end effector pivots to the right RD about the articulation axis. Once surgical end effector 1100 is articulated to the desired position, the user advances locking bar assembly 2240 axially in proximal direction PD, thereby moving locking wedge 2244 proximally to the right side. The right locking member 2224 and the left locking member 2228 are laterally outwardly moved into driving contact with two actuation detents 2227, 2229 formed on the locking member 2224 and the left locking member 2228, respectively. The end effector 1100 can be locked in its articulated position by biasing it into locking engagement with the right and left articulation gear racks 1720, 1723, respectively. Such proximal movement of lock bar assembly 2240 also serves to separate lock bar coupler 2246 from shifter 2252, as shown in FIG.

As seen in FIG. 89, when shifter 2252 is separated from locking bar assembly 2240, shifter drive rack 2254 is no longer in meshing engagement with firing rack 1624 on distal firing bar 1620 and shifter driven rack 2256 is no longer in meshing engagement. is no longer in meshing engagement with articulation pinion gear 2262 . Accordingly, at this point the distal firing bar 1620 can be advanced distally to impart firing motion to the surgical end effector and then retracted proximally to the starting position shown in FIG. Once distal firing bar 1620 has returned to the starting position, the user may then advance locking bar assembly 2240 distally to operatively engage locking bar coupler 2246 with proximal end 2253 of shifter 2252 . , allowing lock wedge 2244 to return to its starting or unlocked position, where right locking member 2224 and left locking member 2228 bounce or otherwise rebound to their unlocked positions. can go back. The user can then apply axial motion to distal firing bar 1620 in the appropriate axial direction to return surgical end effector 1100 to its non-articulated position.

90-95 show an alternative articulation locking mechanism 2310 for locking surgical end effector 1100 in an articulated position about articulation axis BB with respect to shaft axis SA. In the illustrated example, surgical end effector 1100 is pivotally coupled to spine assembly 1500'. Spine assembly 1500' may be attached to chassis 1800 (FIG. 4) in the manner described above. A distal end portion 1540 of upper spine portion 1539 of spine assembly 1500' is formed with a downwardly projecting articulation pin 1542 that defines an articulation axis BB. Articulation pin 1542 is configured to be rotatably or pivotally received within spine mounting hole 1254 provided in mounting base 1252 of end effector mounting assembly 1250''. The end effector mounting assembly 1250'' extends through a lateral mounting hole 1251 of the mounting assembly 1250'' and within a channel mounting hole 1106 (FIG. 6) provided within the proximal end 1103 of the elongated channel 1102. It is attached to the proximal end 1103 of the elongated channel 1102 by a spring pin connector 1235 (FIG. 6) that is received in the channel.

90, the illustrated mechanism uses two articulation links 1710R'' and 1710L'' to apply right and left articulations to surgical end effector 1100. As shown in FIG. To articulate surgical end effector 1100 to the right, articulation link 1710R'' is axially retracted in proximal direction PD and articulation link 1710L'' is axially advanced in distal direction DD. . Conversely, to articulate surgical end effector 1100 leftward, articulation link 1710L'' is axially retracted in proximal direction PD and articulation link 1710R'' is axially retracted in distal direction DD. is advanced to Right distal articulation link 1710R'' has a slotted end portion 1711R received on right articulation pin 1266R attached to end effector mounting assembly 1250''. Similarly, left distal articulation link 1710L'' has a slotted end portion 1711L received on left articulation pin 1266L attached to end effector mounting assembly 1250''.

Still referring to FIG. 90, right brake plate 2312 is formed on right distal articulation link 1710R'' and left brake plate 2320 is formed on left distal articulation link 1710L''. Right and left brake plates 2312, 2320 are supported between lower distal spine portion 1552' and upper spine portion 1539, as further seen in FIG. Lower distal spine portion 1552 ′ has an upwardly extending distal support pin 1554 configured to be received within a distal boss (not shown) formed on the underside of upper spine portion 1539 . include. In the illustrated mechanism, the articulation locking mechanism 2310 also operatively interfaces with or otherwise operatively interfaces with articulation transmitters of the types described herein, in the distal direction DD and the proximal direction PD. It includes an axially movable and lockable lock bar assembly 2340 that may interface with a lock bar control mechanism (not shown) configured to impart axial control motion. Locking bar assembly 2340 includes locking clamp 2344 formed on distal end 2342 thereof. Locking clamp 2344 extends through right brake slot 2314 in right brake plate 2312 and left brake slot 2322 in left brake plate 2320 as well as through an axial slot 2352 provided through wedge plate 2350 . 2360 to engage the clamp plate 2360 .

The operation of the joint locking mechanism 2310 is described below with reference to FIGS. 91-95. FIG. 91 shows surgical end effector 1100 in a non-articulated position. Lock bar assembly 2340 is in the unlocked position, where clamping portion 2344 does not apply any clamping force to right and left brake plates 2312,2320. Thus, right distal articulation link 1710R'' and left distal articulation link 1710L'' are free to move axially when articulation is applied. Friction between various components may prevent surgical end effector 1100 from flopping or rotating about articulation axis BB. FIG. 92 illustrates surgical end effector 1100 by axially moving right distal articulation link 1710R'' in distal direction DD and moving left distal articulation link 1710L'' in proximal direction PD. to the left direction LD. FIG. 93 shows the joint locking mechanism 2310 in the unlocked configuration. Figures 94 and 95 show the joint locking mechanism 2310 in the locked configuration. Articulation locking mechanism 2310 is locked by applying an actuation motion proximally to locking bar assembly 2340 . Such action causes the clamping portions thereof for clamping right and left brake plates 2312, 2320 to be retentively clamped between wedge plate 2350 and lower distal spine portion 1552'. Such a mechanism applies a clamping force CF between clamp plate 2360 and lower distal spine portion 1552', thereby causing right distal articulation link 1710R'' and left distal articulation link 1710L'' to be clamped together. It serves to prevent any further axial movement.

96 and 97 show an example of an articulation stroke amplifier transmission mechanism 2410 that can be used with various articulation linkages disclosed herein. Referring first to FIG. 97, there is shown a cross-sectional view of a portion of shaft assembly 1400'' including proximal closure member 1410 and upper intermediate spine segment 1510'' and distal spine extension 1562''. Middle spine segment 1510'' and distal spine extension 1562'' serve to operatively support distal firing bar 1620 and proximal firing shaft segment 1602 in various manners disclosed herein. This embodiment includes an intermediate articulation link segment 1706 and a distal articulation link segment 1707 that can interface with the end effector mounting assembly in any of the various ways disclosed herein. Intermediate articulation link 1706 can operably interface with articulation lock 1210 in a variety of ways disclosed herein. As seen in FIG. 96, the intermediate articulation link segment 1706 includes an intermediate or first gear rack 1708 formed thereon, and the distal articulation link segment 1707 includes a second or distal gear rack 1709. include. Gear racks 1708 and 1709 are in meshing engagement with at least one and preferably at least two amplifier pinion gear sets 2412 rotatably supported between upper intermediate spine segment 1510'' and distal spine extension 1562''. are in agreement. See FIG. In the illustrated arrangement, for example, each amplifier gear set 2412 has a smaller drive gear 2414 supported in meshing engagement with the first gear rack 1708 and a larger amplifier gear 2416 supported in meshing engagement with the distal gear rack 1709 . And prepare.

98A-98C illustrate the operation of the articulation stroke amplifier transmission mechanism 2410. FIG. FIG. 98A shows the position of intermediate articulation link segment 1706 and distal articulation link segment 1707 when in a neutral or non-articulated position. 98B shows the position of intermediate articulation link segment 1706 and distal articulation link segment 1707 after intermediate articulation link segment 1706 has been axially advanced a distance _D1R from the neutral position of FIG. 98A. indicate. As further seen in FIG. 98B, the distal articulation link 1707 has moved an axial distance _D2R . In the example shown, D _2R >D _1R . 98C shows intermediate articulation link segment 1706 and distal articulation link segment 1706 after intermediate articulation link segment 1706 has been axially advanced in proximal direction PD a distance D _1L from the neutral position shown in FIG. 98A. The position of 1707 is shown. As further seen in FIG. 98C, the distal articulation link 1707 has moved an axial distance _D2L . In the illustrated example, D _2L >D _1L . Such a mechanism thus provides an additional axial articulation stroke that can be used to articulate the end effector through a greater range of articulation about the articulation axis.

99A and 99B show an example of an articulation stroke amplifier transmitter 2510 that can be used with various articulation linkages disclosed herein. Articulation stroke amplifier 2510 operatively interfaces with proximal articulation driver 1700'', which is similar to proximal articulation driver 1700 except for the differences noted above. They may be identical. Specifically, proximal articulation driver 1700'' includes a drive rack 1701 formed on its distal end. The drive rack is configured to meshingly engage a gear segment 2522 formed on a swing gear 2520 pivotally pinned to a corresponding portion of the spine assembly. In the illustrated mechanism, the swing gear 2520 is pivotable about an axial transverse swing gear axis along which the proximal articulation driver 1700'' is configured to move. Swing gear 2520 further includes transfer slot 2524 configured to receive transfer pin 1713 attached to proximal end 1716 of intermediate articulation link segment 1706''. As seen in FIGS. 99A-99B, the distal end of intermediate articulation link segment 1706'' is configured to operatively interface with articulation lock 1210 in various manners disclosed herein. .

FIG. 99A shows articulation stroke amplifier transmitter 2510 in a neutral position with no articulation applied to proximal articulation driver 1700″. FIG. 99B shows the position of the articulation stroke amplifier transmitter 2510 after the proximal articulation driver 1700'' has been axially advanced in the distal direction DD by a _first axial distance D1. Such distal movement of the proximal articulation driver 1700'' pivots the swing gear 2520 about the swing gear axis in a clockwise direction CW. Such movement of swing gear 2520 drives intermediate articulation link segment 1706'' proximally a _second axial distance D2. In such an example, D ₂ >D ₁ . 99C-99D show a similar mechanism except that a transfer slot 2524 is provided on the proximal end 1716 of the intermediate articulation link segment 1706'' and a transfer pin 1713 is provided on the swing gear 2520. FIG.

Example 1 - A surgical tool assembly comprising a surgical end effector movably coupled to a shaft assembly by an articulation joint. The articulation joint is configured to selectively facilitate selective articulation of the surgical end effector with respect to the shaft assembly about the articulation axis. The articulation axis traverses the shaft axis defined by the shaft assembly. The shaft assembly has a proximal end, a distal end operably coupled to the articulation joint, and an elongated notch in the shaft assembly. An elongated notch is located on one side of the shaft axis and adjacent the distal end.

Example 2 - The surgical tool of Example 1, wherein the articulation joint is configured to limit articulation of the surgical end effector about the articulation axis to one side of the shaft axis assembly.

Example 3 - The surgical tool assembly of Example 1 or 2, wherein the shaft assembly comprises a spine assembly and a proximal closure member. A spine assembly includes a distal spine end operably coupled to the articulation joint. A proximal closure member is supported on the spine assembly for selective axial movement relative to the spine assembly. The elongated notches are an elongated spine notch in the distal spine end on one side of the shaft axis and an elongated closure member notch in the proximal closure member on one side of the shaft axis and corresponding to the elongated spine notch. And further comprising.

Example 4 - A surgical end effector has a first jaw operably coupled to the articulation joint and for selective movable movement relative to the first jaw in response to an applied closing motion. A surgical tool assembly according to example 3, comprising a supported second jaw.

Example 5 - The shaft assembly further comprises a distal closure member movably coupled to the proximal closure member for selective axial movement therewith, the distal closure member being coupled to the second 5. The surgical tool assembly of Example 4, operably interfacing with the jaws to impart a closing motion to the second jaw.

Example 6 - The surgical tool assembly further comprises means for preventing buckling of the distal end of the shaft assembly when an axial actuation motion is applied to the proximal end of the shaft assembly, Example 1 or 3. The surgical tool assembly according to 2.

Example 7 - The surgical tool assembly further comprises means for preventing buckling of the distal end of the shaft assembly when an axial actuation motion is applied to the proximal end of the shaft assembly, Example 3, 6. A surgical tool assembly according to 4 or 5.

Example 8 - According to example 7, wherein the means for preventing buckling comprises at least one alignment member projecting from the proximal closure member and extending into a corresponding axial slot in the spine assembly of surgical tool assemblies.

Example 9 - At least one alignment member protrudes from the proximal closure member at the first position and extends into and axially moves within a corresponding first axial slot in the spine assembly at least one first alignment member and at least one second alignment member projecting from the proximal closure member at a second position diametrically opposite the first position; A surgical tool assembly according to Example 8. A second alignment member extends into a corresponding second axial slot in the spine assembly.

Example 10 - The surgical tool assembly of Example 8 or 9, wherein at least one of the at least one alignment member has an L-shaped cross-sectional shape.

Example 11 - A surgical tool assembly comprising a surgical end effector movably coupled to a shaft assembly by an articulation joint. The articulation joint is configured to facilitate selective articulation of the surgical end effector with respect to the shaft assembly about the articulation axis. The articulation axis traverses the shaft axis defined by the shaft assembly. The shaft assembly comprises a proximal portion including an uninterrupted outer proximal perimeter and a distal portion extending from the proximal portion and operably coupled to the articulation joint. . The distal portion includes a distal perimeter including a discontinuous distal portion located on one side of the shaft axis.

Example 12 - The surgical tool of Example 11, wherein the articulation joint is configured to limit articulation of the surgical end effector about the articulation axis to one side of the shaft axis assembly.

Example 13 - A shaft assembly supported on a spine assembly comprising a distal spine end operably coupled to an articulation joint and for selective axial movement relative to the spine assembly A surgical tool assembly according to example 11 or 12, comprising a proximal closure member. The discontinuous distal portion includes an elongate closure member notch in the proximal closure member on one side of the shaft axis.

Example 14 - The surgical tool assembly of Example 13, wherein the surgical tool assembly further comprises an elongated closure member notch.

Example 15 - The surgical tool assembly further comprises means for preventing buckling of the distal end of the shaft assembly when an axial actuation motion is applied to the proximal portion of the shaft assembly, Example 13 or 15. The surgical tool assembly according to 14.

Example 16 - According to example 15, the means for preventing buckling comprises at least one alignment member projecting from the proximal closure member and extending into a corresponding axial slot in the spine assembly of surgical tool assemblies.

Example 17 - At least one alignment member protrudes from the proximal closure member in the first position and extends into and axially moves within a corresponding first axial slot in the spine assembly; An embodiment comprising at least one first alignment member and at least one second alignment member projecting from the proximal closure member at a second position diametrically opposite the first position 17. The surgical tool assembly according to 16. A second alignment member extends into a corresponding second axial slot in the spine assembly.

Example 18 - The surgical tool assembly of Example 16 or 17, wherein at least one of the at least one alignment member has an L-shaped cross-sectional shape.

Example 19 - The surgical tool assembly of Example 11, 12, 13, 14, 15, 16, 17, or 18, wherein the distal portion includes a distal axial length. The proximal portion includes a proximal axial length, the proximal axial length being greater than the distal axial length.

Example 20 - A surgical tool assembly comprising a surgical end effector movably coupled to a shaft assembly by an articulation joint. The articulation joint is configured to facilitate selective articulation of the surgical end effector with respect to the shaft assembly about the articulation axis. The articulation axis traverses the shaft axis defined by the shaft assembly. The shaft assembly includes a proximal end, a distal end operably coupled to the articulation joint, an elongated notch, and an axially displaceable firing member axially aligned with the shaft axis. An elongated notch is in the shaft assembly on one side of the shaft axis and is located adjacent the distal end.

Example 21 - A surgical tool assembly comprising a shaft assembly, a surgical end effector, and a protective cap member. The shaft assembly includes an axially moveable closure member and an axially moveable firing member selectively axially moveable between an unfired position and a fired position. A surgical end effector comprises a first jaw and a second jaw comprising a mounting portion including a pair of mounting walls. The mounting wall is configured to movably engage a portion of the first jaw to movably support the second jaw on the first jaw. The mounting portion defines a cam region configured to be engaged by an axially movable closure member to move the second jaw relative to the first jaw from an open position to a closed position. The mounting walls define an upper open parking area between the mounting walls for housing the firing member therein when the firing member is in the unfired position. A protective cap member is attached to the mounting wall and covers at least a portion of the top open parking area.

Example 22 - Each of the mounting walls is pivotable to a corresponding portion of the first jaw to facilitate pivotal movement of the second jaw relative to the first jaw about the pivot axis 22. The surgical tool assembly of Example 21, wherein the surgical tool assembly is configured to engage a.

[00130] Example 23 - The surgical tool assembly of Example 22, wherein each of the mounting walls protrudes proximally from the cam region. a protective cap configured to cover at least a portion of the upper open parking area proximal to the camming area to form a pre-closing cam surface proximal to the camming area; and extending from the transitional section. and at least one mounting portion connecting the protective cap to at least one of the mounting walls.

Example 24 - At least one attachment member extends downwardly from the transition portion and is configured to retainably engage a corresponding one of the mounting walls; a second leg extending downwardly from the portion and configured to retainably engage a corresponding other of the mounting walls. assembly.

[00133] Example 25 - The surgical tool assembly of Example 24, wherein the first and second legs are removably attachable to the mounting wall.

Example 26 - The first leg has a first mounting opening configured to retainably receive therein a first mounting lug formed on a corresponding one of the mounting walls 26. The surgical tool assembly of example 25, comprising: The second leg includes a second mounting opening configured to retainably receive therein a second mounting lug formed on the corresponding other of the mounting walls.

Example 27 - A closure member configured to cammingly engage a pre-closing cam surface on the protective cap and a cam region on the mounting portion to move the second jaw from the open position to the closed position A surgical tool assembly according to example 23, 24, 25, or 26, comprising a distal camming surface.

Example 28 - The surgical tool assembly of Examples 22, 23, 24, 25, 26, or 27, wherein the surgical tool assembly further includes means for biasing the second jaw to the open position.

[00333] Example 29 - The surgical tool assembly of Example 28, wherein the surgical tool assembly further comprises means for preventing the second jaw from being opened beyond the maximum open position.

Embodiment 30 - The second jaw is configured to be selectively pivotable relative to the first jaw about a pivot axis, and at least a portion of the upper open parking area is proximate the pivot axis. 30. The surgical tool assembly according to example 22, 23, 24, 25, 26, 27, 28, or 29, in position.

Example 31 - According to example 22, 23, 24, 25, 26, 27, 28, 29, or 30, wherein the second jaw comprises a pair of trunnions pivotally supported within the mounting wall. Surgical tool assembly.

Example 32 - A pair of trunnions are configured to be pivotally supported within a first lateral pivot hole in a first one of the mounting walls; a first trunnion; and a second trunnion configured to be pivotally supported within a second lateral pivot hole in a second one of the sections. . The first and second trunnions define a pivot axis about which the second jaw is pivotable.

Embodiment 33 - The surgical tool assembly further comprises a first mounting slot in a first one of the mounting walls and a second mounting slot in a second one of the mounting walls, A surgical tool assembly according to Example 32. A first mounting slot extends laterally from a first top edge of a first one of the mounting walls to the first lateral pivot hole relative to the first lateral pivot hole. do. A second mounting slot extends from a second top edge of said second one of said mounting walls relative to said second lateral pivot hole. extends laterally to

Example 34 - A surgical tool assembly comprising a shaft assembly, a surgical end effector, and a protective cap member. The shaft assembly includes an axially moveable closure member and an axially moveable firing member selectively axially moveable between an unfired position and a fired position. The surgical end effector includes an elongated channel configured to operably support a surgical staple cartridge therein and an anvil including an anvil mounting portion. The anvil mounting portion includes a pair of anvil mounting walls pivotally supported on the elongate channel for selective pivotal movement relative to the elongate channel about a pivot axis. The anvil mounting portion defines a cam region configured to be engaged by an axially movable closure member to move the anvil relative to the elongate channel from an open position to a closed position. The anvil mounting walls define an upper open parking area therebetween for housing the firing members therein when the firing members are in the unfired position. A protective cap member is attached to the anvil mounting wall and covers at least a portion of the top open parking area.

[00353] Example 35 - The surgical tool assembly of Example 34, wherein at least a portion of the upper open parking area is proximal to the pivot axis.

Example 36 - The surgical application of Example 34 or 35, wherein the firing member comprises a vertically extending firing body with a tissue-cutting edge, a top anvil-engaging tab, and a bottom channel-engaging tab tool assembly. An upper anvil engagement tab extends laterally from the upper end of the firing body and is configured to engage the anvil when the firing member is axially advanced from the unfired position to the fired position. A bottom channel engagement tab extends laterally from the bottom of the firing body and engages the channel for support within the elongated channel when the firing member is axially advanced from the unfired position to the fired position. configured to hold the underside of the anvil a desired distance from the cartridge deck of the assembled surgical staple cartridge.

[00433] Example 37 - The surgical tool assembly of Example 34, 35, or 36, wherein each of the mounting walls protrudes proximally from the cam region. a protective cap configured to cover at least a portion of the upper open parking area proximal to the camming area to form a pre-closing cam surface proximal to the camming area; and extending from the transitional section. and at least one mounting portion connecting the protective cap to at least one of the anvil mounting walls.

Embodiment 38 - At least one mounting portion extends downwardly from the transition portion and is configured to retainably engage a corresponding one of the anvil mounting walls; a second leg extending downwardly from the transition portion and configured to retainably engage a corresponding other of the anvil mounting walls. for tool assembly.

Example 39 - The surgical tool of Example 34, 35, 36, 37, or 38, wherein the surgical tool assembly further comprises means for biasing the anvil to the open position when the closure member is in the starting position for tool assembly.

Example 40 - A surgical tool assembly comprising a shaft assembly and a surgical end effector. The shaft assembly includes an axially moveable closure member and an axially moveable firing member selectively axially moveable between an unfired position and a fired position. A surgical end effector comprises a first jaw and a second jaw comprising a mounting portion. The mounting portion includes a pair of mounting walls configured to movably engage a portion of the first jaw to movably support the second jaw on the first jaw. The mounting portion defines a cam region configured to be engaged by an axially movable closure member to move the second jaw relative to the first jaw from an open position to a closed position. The mounting walls define an upper open parking area between the mounting walls for housing the firing member therein when the firing member is in the unfired position. The surgical tool assembly further comprises means for at least partially covering at least a portion of the upper open parking area and defining a closed pre-camming surface proximal to the camming area.

Example 41 - A surgical tool assembly comprising a first jaw, a second jaw and a shaft assembly. A second jaw is movably supported on the first jaw for selective movement relative to the first jaw between an open position and a closed position about a fixed pivot axis. there is The shaft assembly provides an initial closing movement relative to the cam surface in a first closing direction perpendicular to the cam surface when the closing member is axially advanced over the cam surface on the second jaw; and an additional closing motion in a second closing direction parallel to the shaft axis.

Embodiment 42 - A cam surface is formed on the second jaw mounting portion, the second jaws each being pivotable to the first jaw for selective pivotal movement about the pivot axis 42. The surgical tool assembly of embodiment 41, further comprising attached first and second mounting walls.

Example 43 - A distal closure tube, wherein the axially movable closure member includes a distal end surface and a distal camming surface configured for camming engagement with a camming surface on the second jaw 43. The surgical tool assembly of example 41 or 42, comprising:

Example 44 - To Example 43, wherein the distal end surface is configured to apply an initial closing motion to the cam surface and the distal camming surface is configured to apply an additional closing motion to the cam surface A surgical tool assembly as described.

Example 45 - Described in Example 44, wherein the distal end surface includes a portion of the cross-sectional thickness of the obturator tube, and the camming surface extends from the distal end surface and includes another portion of the cross-sectional thickness of the obturator tube of surgical tool assemblies.

[00100] Example 46 - The surgical tool assembly of Example 45, wherein the obturator tube comprises an outer surface, an inner surface, and a distal end defining a distal end surface. A distal camming surface extends from the distal end surface to the inner surface at an obtuse angle to the distal end surface.

Example 47 - The shaft assembly is axially movable between the first mounting wall and the second mounting wall and is selectively axially movable between a start position and an end position 43. The surgical tool assembly of embodiment 42, further comprising a firing member.

[00103] Example 48 - The surgical tool assembly of Example 47, wherein at least a portion of the firing member is proximal to the cam surface when the firing member is in the starting position.

Example 49 - A surgical tool assembly comprising an end effector and a shaft assembly. The end effector includes an elongated channel configured to operably support a surgical staple cartridge therein and an anvil. The anvil includes an anvil mounting portion movably supported on the elongated channel for selective movement relative to the elongated channel between open and closed positions about a fixed pivot axis. The shaft assembly defines a shaft axis and includes an axially movable closure member, the closure member being axially advanced over a cam surface on the anvil mounting portion. when applied, an initial closing movement relative to the cam surface in a first closing direction perpendicular to the cam surface and an additional closing movement relative to the cam surface in a second closing direction parallel to the shaft axis. configured to apply.

Embodiment 50 - The anvil further comprises first and second anvil mounting walls each pivotally attached to the elongated channel for selective pivotal movement about the pivot axis, embodiment A surgical tool assembly according to Example 49.

Example 51 - An axially movable closure member includes a distal end surface and a distal camming surface configured for camming engagement with a camming surface on an anvil mounting portion. 51. The surgical tool assembly of embodiment 49 or 50, comprising:

Example 52 - To Example 51, wherein the distal end surface is configured to apply an initial closing motion to the cam surface and the distal camming surface is configured to apply an additional closing motion to the cam surface A surgical tool assembly as described.

Example 53 - Described in Example 52, wherein the distal end surface includes a portion of the cross-sectional thickness of the obturator tube, and the camming surface extends from the distal end surface and includes another portion of the cross-sectional thickness of the obturator tube of surgical tool assemblies.

Embodiment 54 - The shaft assembly is axially movable between the first anvil mounting wall and the second anvil mounting wall and is selectively axially movable between a start position and an end position. 51. The surgical tool assembly of embodiment 50, further comprising a moveable firing member.

[00104] Example 55 - The surgical tool assembly according to example 54, wherein at least a portion of the firing member is proximal to the cam surface when the firing member is in the starting position.

Example 56—A surgical tool assembly comprising an end effector and a shaft assembly defining a shaft axis and comprising an axially movable closure member. an elongate channel configured to operably support a surgical cartridge therein; and an end effector on the elongate channel for selectively moving between an open position and a closed position relative to the elongate channel. an anvil movably having an anvil mounting portion supported on the anvil. The surgical tool assembly includes first closure means on the closure member for applying an initial closure motion to the cam surface on the anvil mounting portion in a first closure direction perpendicular to the cam surface; second closing means for applying an additional closing motion to the cam surface in a second closing direction parallel to the shaft axis when the member is axially advanced over the cam surface; Prepare.

Example 57 - The first closure means comprises a distal camming surface on a portion of the distal end of the closure member and the second closure means comprises a distal camming surface on another portion of the distal end. 57. The surgical tool assembly of Example 56, including a distal camming surface extending from the distal camming surface at an obtuse angle to it.

Embodiment 58 - A first and first cam surface is formed on the anvil mounting portion, the anvil being each pivotally mounted in an elongated channel for selective pivotal movement about a pivot axis. 58. The surgical tool assembly of embodiment 56 or 57, further comprising two mounting walls.

Embodiment 59 - The shaft assembly is axially movable between the first mounting wall and the second mounting wall and is selectively axially movable between a start position and an end position 59. The surgical tool assembly according to embodiment 58, further comprising a firing member.

[00103] Example 60 - The surgical tool assembly of Example 59, wherein at least a portion of the firing member is proximal to the camming surface when the firing member is in the starting position.

Example 61 - A surgical tool assembly comprising a surgical end effector and a closure member axially moveable in response to applied closing and opening movements. The surgical end effector comprises a first jaw and a second jaw comprising a second jaw body portion and a second jaw mounting portion. A second jaw mounting portion is movably coupled to the first jaw for selective movement relative to the first jaw between an open position and a closed position. The closure member includes at least one opening cam formed thereon, the at least one opening cam configured to movably engage a corresponding cam surface formed on the second jaw body portion. and, as a result, when an opening motion is applied to the closure member, the at least one opening cam is movably engaged with a corresponding cam surface to move the second jaw to the open position. When a closing motion is applied to the closing member, the closing member engages the second jaw to move the second jaw to one of the closed positions.

Embodiment 62 - At least one opening cam extends distally from the distal end of the closure member and cammingly engages a first one of the camming surfaces formed on the second jaw body portion. a first hook portion configured to mate and a second one of camming surfaces extending distally from the distal end of the closure member and formed on the second jaw body portion; 62. The surgical tool assembly of Example 61, comprising a second hook portion configured to cammingly engage the two.

[00101] Example 63 - The surgical tool assembly of Example 61 or 62, wherein the cam surface comprises a downwardly extending ramp formed on the second jaw body portion.

Embodiment 64 - An embodiment wherein each of the at least one opening cam comprises a camming end formed thereon configured for camming engagement with a corresponding ramp when an opening motion is applied to the closure member Surgical tool assembly according to 63.

Embodiment 65 - Each ramp comprises a ramp end and each camming end engages the ramp end of the corresponding ramp to fully open the second jaw relative to the first jaw 65. The surgical tool assembly according to example 64, configured to hold in place.

Example 66 - The surgical tool of example 61, 62, 63, 64, or 65, wherein the surgical tool assembly further comprises secondary jaw opening means for applying additional opening motion to the second jaw assembly.

Embodiment 67 - The secondary jaw opening means is adapted to engage a corresponding jaw opening mechanism on said second jaw to apply additional opening movement to the second jaw when an opening movement is applied to the closure member. 67. The surgical tool assembly according to embodiment 66, comprising at least one secondary jaw opening member on the closure member configured.

Example 68 - A secondary jaw opening mechanism is at least one first jaw opening tab integrally formed within the closure member and configured to contact a corresponding one of the corresponding jaw opening mechanisms and at least one second jaw opening tab integrally formed within the closure member and configured to contact another corresponding one of the corresponding jaw opening mechanisms Surgical tool assembly according to 67.

Example 69 - The surgical tool according to examples 66, 67, or 68, wherein the secondary jaw opening means comprises at least one biasing member configured to impart an additional opening motion to the second jaw assembly.

[00101] Example 70 - The surgical tool assembly of Example 62, 63, 64, 65, 66, 67, 68, or 69, wherein the first and second hook portions each include a flexible portion thereon.

[00101] Example 71 - The surgical tool assembly of Example 70, wherein the flexible portion includes a flexible material attached to each of the first and second hook portions.

Example 72 - The at least one biasing member comprises a spring corresponding to each of the first and second hook portions and attached to each of the first and second hook portions, or Surgical tool assembly according to 71.

Example 73 - A surgical tool assembly comprising a surgical end effector and an axially moveable closure member in response to applied closing and opening movements. The surgical end effector includes an elongated channel configured to operably support a surgical staple cartridge therein and an anvil including an anvil body and an anvil mounting portion, the anvil mounting portion having an open position and a closed position. is pivotally supported on the elongated channel for selective movement relative to the elongated channel between the positions. The closure member includes at least one opening cam formed thereon, the at least one opening cam configured to movably engage a corresponding cam surface formed on the anvil body, the As a result, when an opening motion is applied to the closure member, the at least one opening cam movably engages a corresponding cam surface to move the anvil to the open position, and when a closing motion is applied to the closure member, A closure member engages the anvil to move the anvil to one of the closed positions.

Example 74 - The surgical tool assembly further comprises at least one tissue stop formed on the anvil body, wherein the at least one cam surface is located proximal to the at least one tissue stop, Example 73 A surgical tool assembly as described in .

Embodiment 75 - At least one opening cam extends distally from the distal end of the closure member and cammingly engages a first one of the camming surfaces formed on the anvil body A first hook portion configured to extend distally from the distal end of the closure member and cammingly engage a second one of the camming surfaces formed on the anvil body. 75. The surgical tool assembly of example 73 or 74, comprising a configured second hook portion.

Example 76 - The surgical tool assembly of example 75, wherein the first and second hook portions each include a flexible portion thereon.

Example 77 - The surgical tool assembly of Example 73 or 74, wherein the first and second hook portions each include a flexible portion thereon.

Example 78 - The surgical tool of example 73, 74, 75, 76, or 77, wherein the surgical tool assembly further comprises secondary anvil opening means for applying additional opening motion to the second jaw assembly.

Example 79 - According to example 78, the anvil is pivotally coupled to the elongate channel for selective pivotal movement between an open position and a closed position about a pivot axis Surgical tool assembly. A secondary anvil opening means is located proximal to the pivot axis.

[00103] Example 80 - A surgical tool assembly comprising a surgical end effector and a closure member. The surgical end effector includes an elongate channel configured to operably support a surgical staple cartridge therein and an anvil including an anvil body and an anvil mounting portion. An anvil mounting portion is pivotally supported on the elongated channel for selective movement relative to the elongated channel between open and closed positions. The closure member is axially movable between a fully actuated position corresponding to the fully closed one of the closed positions and a non-actuated position corresponding to the open position. The closure member includes a closure system configured to sequentially apply an initial opening motion to the anvil and an additional secondary motion to the anvil as the closure member is moved from a fully actuated position to a non-actuated position.

Example 81 - Surgical end effector for selective movement between an open position and a closed position with a first jaw configured to operably support a surgical staple cartridge therein A surgical end effector comprising a second jaw movably supported relative to the first jaw, a firing member, and a firing member lockout system. The firing member is supported for axial movement within the first jaw along the shaft axis between start and end positions upon application of firing and retraction motions. The firing member lockout system is movable between an unactuated position and a locked position by the second jaw and is located in the unfired position when the firing member is first advanced distally from the starting position. Unless an unfired surgical staple cartridge with a cam assembly mounted therein is supported within the first jaw, the firing member is locked with a firing member lockout system to prevent further distal advancement of the firing member. match.

[00101] Example 82 - The surgical end effector of Example 81, wherein the firing member lockout system comprises a locking member attached to the first jaw.

Example 83 - The surgical procedure of example 82, wherein the locking member further comprises a spring tab supporting the locking member on the first jaw and configured to bias the locking member to the unlocked position for end effectors.

Example 84 - The locking member locks the firing member upon initial distal advancement of the firing member when the second jaw is in the closed position unless an unfired surgical staple cartridge is supported within the first jaw. 84. The surgical end effector according to example 82 or 83, comprising at least one laterally movable locking portion configured in locking engagement with a portion of the.

Embodiment 85 - A firing member comprises a firing member body comprising locking projections corresponding to each of the laterally movable locking portions, each locking projection having an unfired surgical staple cartridge supported within the first jaw 85. The method according to embodiment 84, wherein the second jaw is oriented for locking engagement with the corresponding laterally movable locking portion upon initial distal advancement of the firing member when the second jaw is in the closed position, unless otherwise specified. Surgical end effector.

Embodiment 86—The cam assembly laterally engages each of the corresponding laterally movable locking portions when an unfired surgical staple cartridge is supported within the first jaw and the cam assembly is in the unfired position. 86. The surgical end effector of embodiment 85, comprising an unlocking mechanism corresponding to each laterally movable locking portion for urging out of locking engagement with the corresponding locking projection.

Embodiment 87 - Each of the laterally movable locking portions has a locking window configured to lock receive a portion of the corresponding locking projection when the laterally movable locking portion is in locking engagement with the corresponding locking projection. 87. The surgical end effector of embodiment 85 or 86, comprising:

Example 88 - A firing member lockout system moves to said second jaw for movement along a corresponding locking axis transverse to said shaft axis when said anvil is in said closed position 88. A surgical end effector according to example 81, 82, 83, 84, 85, 86, or 87, comprising at least one locking member operably coupled thereto.

Embodiment 89 - A firing member lockout system comprising a locking member movably supported for movement between an unlocked position and a locked position, wherein upon initial distal advancement of the firing member, the locking member is configured to hook-engage a corresponding portion of the firing member to prevent advancement of the firing member from the starting position to the ending position, Examples 81, 82, 83, A surgical end effector according to 84, 85, 86, 87 or 88.

Example 90 - A surgical end effector, an elongated channel configured to operably support a surgical staple cartridge therein and an anvil, wherein the anvil is in an open position and a closed position relative to the elongated channel a surgical end effector comprising an anvil supported relative to an elongated channel so as to be selectively movable between and a firing member; and a firing member lockout system. The firing member is supported within the elongated channel for axial movement along the shaft axis between start and end positions upon application of firing and retraction motions. The firing member lockout system is movable by the anvil between an unactuated position and a locked position such that when the firing member is initially advanced distally from the starting position, the firing member is positioned in the unfired position. Locking engagement with the firing member lockout system prevents further distal advancement of the firing member unless an unfired surgical staple cartridge with a cam assembly that is engaged is supported within the elongated channel. The firing member lockout system is configured to move from the unactuated position to the locked position when the anvil is moved to the closed position.

[00101] Example 91 - The surgical end effector of Example 90, wherein the firing member lockout system comprises a locking member. The locking member includes a pair of laterally movable locking portions, a mounting portion configured to support the locking member on the surgical end effector and bias the locking member to an unactuated position, and an anvil in the closed position. at least one anvil tab on the locking member for contact by a corresponding portion of the anvil when being moved.

Example 92 - Each laterally movable locking portion retainably engages a corresponding portion of the firing member when the locking member is in the locked position unless an unfired surgical staple cartridge is supported within the elongated channel. 92. The surgical end effector of embodiment 91, comprising a locking window configured to engage.

Example 93 - An Unfired Surgical Staple Cartridge Each Corresponding Portion of a Firing Member Corresponds to a Respective Locking Window of a Corresponding Laterally Movable Locking Portion and Includes a Cam Assembly Located in an Unfired Position is supported in the elongated channel and is dimensioned to be retainingly received within each of the locking windows in locking engagement therewith when the locking member is in the locked position. 93. A surgical end effector according to embodiment 92, including a laterally projecting locking lug.

Embodiment 94 - A cam assembly laterally biases each corresponding laterally movable locking portion when an unfired surgical staple cartridge is supported within the elongated channel and the cam assembly is in an unfired position. 94. A surgical end effector according to embodiment 93, comprising an unlocking mechanism corresponding to each laterally movable locking portion for disengaging from locking engagement with a corresponding locking lug.

Example 95 - A firing member lockout system comprising at least one locking member, the anvil comprising an anvil body and an anvil mounting portion comprising a pair of spaced apart anvil mounting walls, each anvil mounting wall comprising: , pivotally supported on the elongate channel, each anvil mounting wall movably supporting a corresponding one of the locking members therein. A surgical end effector as described.

Example 96 - A firing member lockout system includes at least one locking member movably coupled to the anvil for movement along a corresponding locking axis transverse to the shaft axis when the anvil is in the closed position. The surgical end effector of example 90, 91, 92, 93, 94, or 95, comprising:

[00103] Example 97 - The surgical end effector of example 90, 91, 92, 93, 94, 95, or 96, wherein the surgical end effector further comprises a tissue cutting surface on the firing member.

Example 98 - A surgical instrument comprising an elongated shaft defining a shaft axis and an elongated channel operably coupled to the elongated shaft and configured to operably support a surgical staple cartridge therein , an anvil supported relative to the elongated channel such that the anvil is selectively moveable between an open position and a closed position relative to the elongated channel. The surgical instrument comprises a firing member supported for axial movement within the elongated channel between a start position and an end position when firing and retraction motions are applied, the anvil not in a closed position, means for preventing the firing member from moving from the start position to the end position unless an unfired surgical staple cartridge with the cam assembly located in the unfired position is supported within the elongated channel; Further prepare.

[00104] Example 99 - The surgical instrument of example 98, wherein the anvil comprises an anvil body and a pair of anvil mounting walls extending from the anvil body. Each anvil mounting wall is such that the anvil is selectively moveable relative to the elongate channel between open and closed positions upon application of closing and opening motions to the anvil by the closing portion of the elongated shaft assembly. , is pivotally connected to the elongated channel.

Embodiment 100 - The means for preventing is a locking member movably supported for movement between an unlocked position and a locked position, the firing member a locking member configured to hook-engage a corresponding portion of the firing member to prevent advancement of the firing member from the terminal position to the unlocked position; 99. A surgical instrument according to example 98 or 99, comprising a means.

Embodiment 101 - A surgical instrument comprising a surgical end effector, an elongated shaft defining a shaft axis, a closure member, and an articulation joint. A surgical end effector includes a first jaw and a second movably supported on the first jaw for selectively moving between an open position and a closed position relative to the first jaw. It comprises Joe (just). A closure member is movably supported on the elongated shaft and configured to selectively move in a closing direction from an open position to a closed position and in an opening direction from a closed position to an open position. The articulation joint couples the surgical end effector to the elongated shaft such that the surgical end effector is selectively articulatable relative to the elongated shaft about an articulation axis transverse to the shaft axis. The articulation joint has a locked configuration that prevents the surgical end effector from articulating about the articulation axis, and an unlocked configuration that allows the surgical end effector to articulate about the articulation axis. An articulation locking mechanism configured to move out of configuration. The articulation locking mechanism moves from the locked configuration to the unlocked configuration when the closure member is moved from the open position in the closing direction. The surgical instrument further comprises means for applying articulation to the surgical end effector when the joint locking mechanism is in the unlocked configuration.

Embodiment 102—A joint locking mechanism comprises at least one locking member, wherein the at least one locking member is in a first position corresponding to an unlocked configuration, and the at least one locking member is positioned in the mounting position of the surgical end effector. 102. The surgical instrument of embodiment 101, movable between a second position in frictional engagement with the portion and the distal end portion of the elongated shaft. The at least one locking member operatively interfaces with the closure member such that initial movement of the closure member in the closing direction causes the at least one locking member to move from the first position to the second position.

Example 103 - According to example 102, the mounting portion of the surgical end effector comprises an upright mounting column including a plurality of column sides, and wherein the at least one locking member comprises a locking member corresponding to each of the column sides. surgical instruments.

Embodiment 104—The distal end portion of the elongated shaft includes a pivot hole defining an articulation axis, and the upstanding mounting column extends into the pivot hole, whereby each of the locking members is positioned within the pivot hole. 104. The surgical instrument of embodiment 103, movably supported between corresponding column sides and the inner wall of the pivot hole.

Embodiment 105—An upright mounting column is configured to move a plurality of locking members into frictional engagement with the inner wall of the pivot hole and the corresponding column side surface when the closure member is moved in the closing direction , embodiment 104.

Example 106 - A closure member is pivoted to the proximal closure member by a linkage mechanism and a proximal closure member that interfaces with a source of closing and opening motion to move the proximal closure member in the closing and opening directions a distal closure member operably connected, a portion of the linkage mechanism interfacing with the upright mounting column such that when the closure member is initially moved in the closing direction, the upright mounting column engages the plurality of locking members; 106. The surgical instrument of embodiment 105, wherein the . is configured to move into frictional engagement with the inner wall of the pivot hole and the corresponding column sidewall.

Example 107 - A linkage mechanism is an upper dual pivot link pivotally connected to and extending between proximal and distal closure members and proximal and distal closures 107. The surgical instrument of embodiment 106, comprising a lower dual pivot link pivotally connected to and extending between the members. The lower dual pivot link is configured to operatively interface with the upright mounting column to apply a locking motion to the upright mounting column when the lower dual pivot link is initially moved in the closing direction. .

Example 108 - An upright mounting column comprising a first end attached to a mounting base adjacent to the lower double pivot link, the upright column tapering towards the free end and free 108. The surgical instrument of example 107, wherein the cross-sectional area of the end is smaller than another cross-sectional area of the first end of the column.

Example 109 - The first jaw comprises an elongated channel configured to operably support a surgical staple cartridge therein and the second jaw comprises an anvil, Examples 101, 102, 103, 104 , 105, 106, 107, or 108.

Embodiment 110—A means for applying articulation to a surgical end effector includes applying a first articulation to the surgical end effector to move the surgical end effector in a first articulation direction about an articulation axis. means for articulating; and means for applying a second articulation to the surgical end effector to articulate the surgical end effector about the articulation axis in a second articulation direction. , embodiment 101, 102, 103, 104, 105, 106, 107, 108, or 109.

Embodiment 111 - A surgical instrument comprising an elongated shaft having a distal end portion and defining a shaft axis, a surgical end effector, a joint locking mechanism, and an articulating member . The surgical end effector comprises an end effector mounting portion, one of the elongate shaft distal end portion and the end effector mounting portion comprising a pivot hole, the other of the elongate shaft distal end portion and the end effector mounting portion comprising: An articulation pin is pivotally received within the pivot hole to define an articulation axis transverse to the shaft axis, about the shaft axis the surgical end effector provides articulation to the surgical end effector. In addition, it is articulatable with respect to the elongated shaft. An articulation locking mechanism is supported within the pivot hole between the articulation pin and the inner wall of the pivot hole. The articulation locking mechanism is a first locked wherein the articulation locking mechanism frictionally engages the articulation pin and the inner wall of the pivot hole to prevent relative pivotal movement of the articulation pin and the distal end portion of the elongate shaft. and an unlocked configuration in which the articulation pin and distal end portion are pivotable relative to each other. The articulation member interfaces with the surgical end effector such that actuation of the articulation member imparts articulation to the surgical end effector. The articulation member moves the articulation locking mechanism from the locked configuration to the unlocked configuration upon initial actuation of the articulation member and moves the articulation locking mechanism from the unlocked configuration upon deactivation of the articulation member. Interfaces with a joint locking mechanism to move to the locked configuration.

[00113] Embodiment 112 - The surgical instrument of embodiment 111, wherein the articulation locking mechanism comprises a torsion spring supported between the articulation pin and the inner wall of the pivot hole.

Embodiment 113 - The torsion spring is a first wherein the torsion spring frictionally engages the articulation pin and the inner wall of the pivot hole to prevent relative pivotal movement of the distal end portion of the elongated shaft and the surgical end effector. 113. The surgical instrument of embodiment 112, rotatable from a position and a position in which the torsion spring does not prevent relative pivotal movement.

Embodiment 114—The articulation locking mechanism comprises at least one locking ball, wherein at least one locking ball is between the articulation pin and the inner wall of the pivot hole, each locking ball between the articulation pin and the inner wall of the pivot hole and a position in which said locking balls do not prevent relative pivotal movement of said distal end portion of said elongated shaft and said surgical end effector. 114. The surgical instrument of embodiment 111, 112, or 113, comprising at least one locking ball movably supported between and.

[00115] Example 115 - According to Example 111, 112, 113, or 114, the surgical end effector comprises a first jaw and a second jaw supported for movable movement relative to the first jaw surgical instruments.

[00111] Example 116 - The surgical instrument of Example 115, wherein the first jaw comprises an elongated channel configured to operably support a surgical staple cartridge therein and the second jaw comprises an anvil .

Embodiment 117 - The articulation member comprises an axially moveable articulation member pivotally coupled to the surgical end effector, whereby axial movement thereof in a first axis direction comprises: The surgical end effector is articulated about the articulation axis in a first articulation direction, and movement of the axially movable articulation member in a second axial direction causes the surgical end effector to articulate. 117. The surgical instrument of embodiment 111, 112, 113, 114, 115, or 116 articulates about an axis of motion in a second articulation direction.

Embodiment 118—A surgical instrument comprising a surgical end effector, an elongated shaft defining a shaft axis, a closure means, and an articulation joint. a surgical end effector having a first jaw movably coupled to the elongated shaft for selective articulation relative to the elongated shaft about an articulation axis transverse to the shaft axis; a second jaw movably supported on the first jaw for selective movement between an open position and a closed position relative thereto. The closing means is further configured to selectively move the second jaw from the open position to the closed position, and the closing means is further configured to selectively move the second jaw from the closed position to the open position. . The articulation joint couples the surgical end effector to the elongated shaft such that the surgical end effector is selectively articulatable relative to the elongated shaft about an articulation axis transverse to the shaft axis. The articulation joint has a locked configuration in which the surgical end effector is prevented from articulating about the articulation axis, and an unlocked configuration in which the surgical end effector is articulable about the articulation axis. An articulation locking mechanism configured to move out of configuration. The articulation locking mechanism moves from the locked configuration to the unlocked configuration when the closing means moves the second jaw from the open position towards the closed position. The surgical instrument further comprises means for applying articulation to the surgical end effector when the joint locking mechanism is in the unlocked configuration.

[00119] Example 119 - The surgical instrument of Example 118, wherein the first jaw comprises an elongated channel configured to operably support a surgical staple cartridge therein and the second jaw comprises an anvil .

Embodiment 120 - An articulation locking mechanism comprises at least one locking member, the at least one locking member in a first position corresponding to an unlocked configuration, and the at least one locking member mounted in the first jaw 121. The surgical instrument of embodiment 119 or 120, movable between a second position in frictional engagement with the portion and the distal end portion of the elongated shaft. The at least one locking member operatively interfaces with the closure member such that initial movement of the closure member in the closing direction causes the at least one locking member to move from the first position to the second position.

Embodiment 121 - A surgical instrument comprising an elongated shaft defining a shaft axis, a surgical end effector, at least one articulation link, and an articulation locking mechanism. A surgical end effector is coupled to the elongated shaft for selective articulation relative to the elongated shaft about an articulation axis transverse to the shaft axis. At least one articulation link operatively interfaces with the source of articulation and is coupled to the surgical end effector for imparting articulation to the surgical end effector. The articulation locking mechanism includes an articulation locking member corresponding to each articulation link, each articulation locking member laterally moving from an unlocked position laterally adjacent the corresponding articulation link to the corresponding articulation link. configured for locking engagement with the articulation link. A surgical instrument operatively interfaces with each of the articulation locking members to selectively laterally move each articulation locking member from an unlocked position into locking engagement with the corresponding articulation link. A means is further provided.

Embodiment 122—Each at least one articulation link comprises an articulation gear rack, an articulation locking member corresponding to the articulation gear rack corresponds to each articulation gear rack, and a corresponding articulation locking member faces the articulation link. 122. Embodiment 121, comprising a locking gear rack oriented with respect to each articulation gear rack in lateral facing relationship for mating engagement with each articulation gear rack when the gear rack is laterally advanced with the surgical instruments.

Example 123 - At least one articulation link includes a right axially movable articulation link including a right articulation gear rack thereon and a left axially movable articulation link including a left articulation gear rack thereon 123. The surgical instrument of embodiment 121 or 122, comprising a kinematic link. The articulation lock member is in lateral facing relationship with the right articulation gear rack for meshing engagement with the right articulation gear rack when the right articulation lock member is laterally advanced toward the right articulation link. A right articulation locking member including a gear rack and laterally face-to-face relationship with the left articulation gear rack for meshing engagement with the left articulation gear rack when the left articulation locking member is laterally advanced toward the left articulation link. a left articulation locking member including a left locking gear rack located at .

Embodiment 124—The actuating means comprises a lock actuator movably positioned relative to the right joint lock member and the left joint lock member, whereby by axially moving the lock actuator in the first axial direction, moving the right articulation lock member laterally toward the right articulation link, thereby bringing the right locking gear rack into locking engagement with the right articulation gear rack and moving the left articulation lock member laterally toward the left articulation link; 124. The surgical instrument of embodiment 123, wherein the left locking gear rack is moved into locking engagement with the left articulation gear rack.

Embodiment 125 - An articulation source comprises an axially movable firing actuator and an axially movable firing actuator configured to selectively apply a firing motion to corresponding portions of a surgical end effector an articulation transmitter operatively interfacing with the actuator and at least one articulation link, whereby actuation of the axially movable firing actuator in the first axial firing direction is controlled by at least one Movement of the articulation link in a first axial articulation direction and movement of the axially movable firing actuator in a second axial retraction direction moves the at least one articulation link in a second axial direction. 125. The surgical instrument of embodiment 121, 122, 123, or 124, wherein the surgical instrument moves in the articulation direction of .

Embodiment 126 - The articulation source comprises an axially movable firing actuator, a right articulation link and a left joint configured to selectively apply firing motion to corresponding portions of the surgical end effector an articulation transmitter operatively interfacing with the motion link and the axially movable firing member, whereby actuation of the axially movable firing actuator in the first axial firing direction comprises: Movement of the right articulation link in a first axis, movement of the left articulation link in a second axis, and movement of the axially movable firing actuator in the second axis is performed by the right articulation link. 125. The surgical instrument of embodiment 123 or 124, wherein the is moved in the second axis and the left articulation link is moved in the first axis.

Embodiment 127—The joint locking mechanism further comprises a locking actuator movably positioned relative to the joint locking member and the left joint locking member, whereby axial movement of the locking actuator in the first axial direction is to the right moving the articulation lock member laterally toward the right articulation link, thereby bringing the right locking gear rack into locking engagement with the right articulation gear rack and moving the left articulation lock member laterally toward the left articulation link; 127. The surgical instrument of embodiment 126, moving so as to bring the left locking gear into locking engagement with the left articulation gear rack.

Embodiment 128—An articulation transmitter configured for selective meshing engagement with a gear assembly in meshing engagement with the right articulation link and the left articulation link, and with the gear assembly and the axially moveable firing actuator 128. The surgical instrument of embodiment 127, comprising a shifter. The shifter is configured for selective operable engagement with the lock actuator such that when the shifter is operably engaged with the lock actuator, the shifter is moved to provide an axially movable firing. In meshing engagement with the actuator and gear assembly, movement of the shifter out of operable engagement with the lock actuator further moves the shifter into engagement with the gear assembly and the axially movable firing actuator. disengage.

[00129] Example 129 - The surgical instrument of Example 125, wherein a corresponding portion of the surgical end effector comprises a firing member attached to an axially movable firing actuator. A firing member is supported for axial movement through the surgical end effector between a start position and an end position within the surgical end effector.

Embodiment 130 - A surgical instrument comprising an elongated shaft defining a shaft axis, a surgical end effector, a firing actuator, and at least one configured to selectively operatively engage the firing actuator A surgical instrument comprising an articulation link and an articulation locking mechanism. A surgical end effector is coupled to the elongated shaft for selective articulation relative to the elongated shaft about an articulation axis transverse to the shaft axis. A firing actuator is selectively axially moveable along the first and second axes to impart firing motion to a firing member operably supported within the surgical end effector. Axial movement of the firing actuator is transmitted to each of the at least one articulation link. The articulation locking mechanism includes a locked configuration in which each of the at least one articulation link is immovably locked in place; It is configured to move laterally to and from an unlocked configuration that is movable. The articulation locking mechanism operably engages each of the at least one articulation link when the articulation locking mechanism is in the unlocked configuration and at least when the articulation locking mechanism is in the locked configuration. Each of the one articulation links interfaces with the firing actuators such that they are prevented from operably engaging the firing actuators.

[00139] Embodiment 131 - The surgical instrument of embodiment 130, wherein the articulation locking mechanism comprises an articulation locking member corresponding to each articulation link. Each articulation locking member is configured to laterally move from an unlocked position laterally adjacent the corresponding articulation link into locking engagement with the corresponding articulation link.

Embodiment 132—Each at least one articulation link includes an articulation gear rack, and each corresponding articulation locking member provides a corresponding articulation when the articulation locking member is laterally advanced toward the corresponding articulation link. a locking gear rack oriented with respect to the articulation gear rack of the corresponding articulation link in lateral facing relationship thereto for meshing engagement with the articulation gear rack of the corresponding articulation link; , example 131.

Example 133 - At least one articulation link includes a right axially movable articulation link including a right articulation gear rack thereon and a left axially movable articulation link including a left articulation gear rack thereon 133. The surgical instrument of embodiment 132, comprising a kinematic link. The articulation lock member is in lateral facing relationship with the right articulation gear rack for meshing engagement with the right articulation gear rack when the right articulation lock member is laterally advanced toward the right articulation link. A right articulation locking member including a gear rack and laterally face-to-face relationship with the left articulation gear rack for meshing engagement with the left articulation gear rack when the left articulation locking member is laterally advanced toward the left articulation link. a left articulation locking member including a left locking gear rack located at .

Example 134 - to Example 130, 131, 132, or 133, wherein the surgical end effector comprises a firing member coupled to the firing actuator and supported for axial movement through the surgical end effector A surgical instrument as described.

Embodiment 135—A surgical end effector includes an elongated channel configured to operably support a surgical staple cartridge therein and a surgical end effector mounted on the elongated channel for selectively moving between an open position and a closed position. 135. The surgical instrument of embodiment 134, comprising: an anvil movably supported in the . The elongated channel is coupled to the elongated shaft for selective articulation relative to the elongated shaft about the articulation axis. The firing member includes a tissue cutting mechanism.

Embodiment 136 - The surgical instrument further comprises an articulation transmitter operably interfacing with the right articulation link and the left articulation link and the axially movable firing actuator, thereby axially movable Actuation of the firing actuator in a first axial firing direction moves the right articulation link in the first axial direction, moves the left articulation link in the second axial direction, and causes the axially movable firing 134. The surgical instrument of embodiment 133, wherein movement of the actuator in the second axis moves the right articulation link in the second axis and moves the left articulation link in the first axis.

[Embodiment 137 - The joint locking mechanism further comprises a lock actuator movably positioned relative to the right joint locking member and the left joint locking member, whereby axial movement of the lock actuator in the first axial direction comprises: moving the right articulation lock member laterally toward the right articulation link, thereby bringing the right locking gear rack into locking engagement with the right articulation gear rack and moving the left articulation lock member laterally toward the left articulation link; 137. The surgical instrument of embodiment 133 or 136, wherein the left locking gear is moved into locking engagement with the left articulation gear rack.

Embodiment 138—An articulation transmitter configured for selective meshing engagement with a gear assembly in meshing engagement with the right articulation link and the left articulation link, and with the gear assembly and the axially moveable firing actuator 137. The surgical instrument of embodiment 136, comprising: a shifter. The shifter is configured for selective operable engagement with the lock actuator such that when the shifter is operably engaged with the lock actuator, the shifter is moved to provide an axially movable firing. In meshing engagement with the actuator and gear assembly. When the shifter is out of operable engagement with the lock actuator, the shifter is moved out of meshing engagement with the gear assembly and the axially movable firing actuator.

Example 139 - A surgical instrument comprising an elongated shaft defining a shaft axis and coupled to the elongated shaft for selective articulation relative to the elongated shaft about an articulation axis transverse to the shaft axis A surgical instrument comprising a surgical end effector, means for producing an axial firing motion, and articulation means. The articulation means interfaces with the means for generating, the articulation means for imparting articulation to the surgical end effector in response to the axial firing motion generated by the means for generating. is configured to the surgical instrument selectively locking the articulation means in a non-movable configuration and unlocking the articulation means such that the means for generating may apply an axial firing motion to the articulation means; Further comprising means for operably coupling the articulating means and the generating means.

Embodiment 140—A surgical end effector includes an elongated channel configured to operably support a surgical staple cartridge therein and a surgical end effector mounted on the elongated channel for selectively moving between an open position and a closed position. 140. The surgical instrument of Example 139, comprising: an anvil movably supported in the . The elongated channel is coupled to the elongated shaft for selective articulation relative to the elongated shaft about the articulation axis. The firing member includes a tissue cutting mechanism.

Embodiment 141 - A surgical tool assembly comprising an elongated shaft defining a shaft axis and coupled to the elongated shaft for selective articulation relative to the elongated shaft about an articulation axis transverse to the shaft axis. a surgical end effector, a first articulation link, a second articulation link, and an articulation stroke amplifier. The first articulation link operably interfaces with the articulation source to selectively axially move the first articulation link a first axial distance in a first articulation direction. do. A second articulation link operably interfaces with the surgical end effector to impart articulation to the surgical end effector. The articulation stroke amplifier moves the second articulation link to the first position when the first articulation link is axially moved in the first axis by a first axial distance. It operably interfaces with the first articulation link and the second articulation link for axial movement another first axial distance that is greater than the first axial distance.

Embodiment 142—The articulation source is configured to additionally axially move the first articulation link in the second axial direction a second axial distance, wherein the first articulation link is moved a second axial distance in a second axis, the articulation stroke amplifier moves the second articulation link in the second axis by another distance greater than the second axial distance. 142. The surgical tool assembly of embodiment 141, moved a second axial distance.

Embodiment 143 - The first articulation link comprises a first articulation gear rack, the second articulation link comprises a second articulation gear rack, and the articulation stroke amplifier comprises the first and second articulation 143. The surgical tool assembly according to example 141 or 142, comprising at least one gear set in meshing engagement with the gear rack.

Embodiment 144—Each at least one gear set includes a first gear rotatably supported in meshing engagement with a first articulation gear rack and rotatable in meshing engagement with the first articulation gear rack 144. The surgical tool assembly of embodiment 143, comprising: a first gear supported on the .

[00143] Example 145 - The surgical tool according to example 141, 142, 143, or 144, wherein the second articulation link operably interfaces with an articulation locking assembly operably coupled to the surgical end effector assembly.

Embodiment 146 - A first articulation link comprises a first articulation gear rack and an articulation stroke amplifier is in meshing engagement with the first articulation gear rack and slidably into the second articulation link 146. A surgical tool assembly according to example 141, 142, 143, 144, or 145, comprising a coupled swing gear.

Embodiment 147 - The swing gear is supported for rotational movement about a swing gear mounting axis that traverses the first and second articulation links, embodiment 141, 142, 143, 144, 145, or Surgical tool assembly according to 146.

[00104] [00149] Embodiment 148 - The surgical tool assembly of embodiment 146 or 147, wherein the second articulation link comprises a slotted distal end slidably engaging a portion of the swing gear therein.

[00149] Example 149 - According to Example 146, 147, or 148, wherein the swing gear has a slot therein configured to slidably engage a distal end portion of the second articulation link Surgical tool assembly.

Embodiment 150 - A surgical tool assembly comprising an elongated shaft defining a shaft axis, a surgical end effector, a first articulation link, a second articulation link, and an articulation stroke amplifier surgical tool assembly. The surgical end effector is configured to operably support the surgical staple cartridge therein and is articulated to the elongated shaft for selective articulation relative to the elongated shaft about an articulation axis transverse to the shaft axis. A connected elongated channel and an anvil movably supported on the elongated channel are provided. The first articulation link operably interfaces with the articulation source to selectively axially move the first articulation link a first axial distance in a first articulation direction. do. A second articulation link operably interfaces with the surgical end effector to impart articulation to the surgical end effector. The articulation stroke amplifier converts the second articulation link to the first articulation link when the first articulation link is axially moved a first axial distance in the first axis. is operably interfaced with the first articulation link and the second articulation link for axial movement of the articulation link another first axial distance that is greater than the first axial distance.

Embodiment 151 - The articulation source comprises a firing member assembly operatively interfacing with a firing member supported for axial movement within an elongated channel, a first articulation link and a firing member assembly operatively interfacing between a firing mode in which axial movement of the firing member assembly is applied to the firing member and an articulation mode in which axial movement of the firing member assembly is applied to the first articulation link; 151. The surgical tool assembly according to embodiment 150, comprising a clutch assembly selectively configurable with.

Embodiment 152 - When the clutch assembly is in the articulation mode, the firing member assembly is configured to additionally axially move the first articulation link in the second axial direction a second axial distance and the first articulation link is moved in the second axis by the second axial distance, the articulation stroke amplifier moves the second articulation link in the second axis to the second 152. The surgical tool assembly of Embodiment 151, moved another second axial distance that is greater than the axial distance.

Embodiment 153 - The first articulation link comprises a first articulation gear rack, the second articulation link comprises a second articulation gear rack, and the articulation stroke amplifier comprises the first and second articulation 153. The surgical tool assembly according to embodiment 151 or 152, comprising at least one gear set in meshing engagement with the gear rack.

Embodiment 154—Each at least one gear set includes a first gear rotatably supported in meshing engagement with a first articulation gear rack and attached to the first gear for rotation with the first gear 154. The surgical tool assembly of embodiment 153, comprising an attached second gear. The second gear has a diameter greater than the diameter of the first gear, and the second gear is in meshing engagement with the second articulation gear rack.

[00100] Embodiment 155 - The surgical tool according to embodiments 151, 152, 153, or 154, wherein the second articulation link operably interfaces with an articulation locking assembly operably coupled to the surgical end effector assembly.

Embodiment 156 - The first articulation link comprises a first articulation gear rack and the articulation stroke amplifier is in meshing engagement with the first articulation gear rack and slidably into the second articulation link 156. A surgical tool assembly according to example 151, 152, 153, 154, or 155, comprising a coupled swing gear.

[00150] Embodiment 157 - The surgical tool assembly according to embodiment 156, wherein the swing gear is supported for rotational movement about a swing gear mounting axis that traverses the first and second articulation links.

[00159] [00159] Embodiment 158 - The surgical tool assembly according to embodiment 156 or 157, wherein the second articulation link comprises a slotted distal end slidably engaging a portion of the swing gear therein.

[00101] Example 159 - According to example 156, 157, or 158, wherein the swing gear has a slot therein configured to slidably engage a distal end portion of the second articulation link Surgical tool assembly.

Embodiment 160 - A surgical tool assembly comprising an elongated shaft defining a shaft axis, a surgical end effector, a first articulation link, a second articulation link, an articulation stroke amplifying means; a surgical tool assembly. A surgical end effector is coupled to the elongated shaft for selective articulation relative to the elongated shaft about an articulation axis transverse to the shaft axis. The first articulation link operably interfaces with the articulation source to selectively axially move the first articulation link a first axial distance in a first articulation direction. do. A second articulation link operably interfaces with the surgical end effector to impart articulation to the surgical end effector. The articulation stroke amplifying means increases the second articulation to a second articulation in response to the first articulation link moving a first axial distance that is less than the second axial distance. operably interfaces with the first articulation link and the second articulation link for moving an axial distance of .

Example 161 - A surgical tool assembly comprising an elongated shaft assembly defining a shaft axis, a surgical end effector, and a distal articulation member. A surgical end effector is movably coupled to the elongate shaft assembly by a distal support link, which is pivotally coupled to the surgical end effector to define an articulation axis transverse to the shaft axis. do. The distal support link is pivotally and axially movably coupled to the elongated shaft assembly such that the surgical end effector is aligned with the elongated shaft assembly along the shaft axis in a first non-articulated state. Selective articulation of a surgical end effector about an articulation axis relative to the elongated shaft assembly between positions and articulation positions located on one side of the shaft axis is facilitated. The distal articulation member operatively interfaces with the articulation source and is pivotally coupled to the surgical end effector for imparting articulation to the surgical end effector.

Embodiment 162—The distal articulation member is configured to move axially on one side of the shaft axis in response to applied articulation, and the distal support link is elongated along the shaft axis 162. The surgical tool assembly according to embodiment 161, configured for axial movement relative to the shaft assembly.

Example 163 - A distal support link is attached to the distal end of the elongated shaft assembly with the distal end pivotally coupled to the surgical end effector for pivotal movement about the articulation axis 163. The surgical tool assembly according to embodiment 161 or 162, comprising a proximal end comprising a proximal axial slot configured to receive a corresponding articulation pin therein.

[00100] Embodiment 164 - A surgical tool assembly operably couples a proximal articulation member operably interfacing with an articulation source, a proximal articulation member, and a proximal end of the distal articulation member 164. The surgical tool assembly of embodiment 161, 162, or 163, further comprising an articulation locking assembly for selectively locking the distal articulation member in an axial position.

[00104] Example 165 - The surgical tool assembly according to example 164, wherein the proximal end of the distal articulation member is pivotally coupled to the joint lock assembly.

[00101] Example 166 - The surgical procedure of Example 161, 162, 163, 164, or 165, wherein the distal support link is pivotally and axially movably coupled to the distal spine member of the elongated shaft assembly for tool assembly.

Example 167 - A surgical end effector selectively moves relative to an elongated channel configured to operably support a surgical staple cartridge therein and between an open position and a closed position and an anvil movably supported on the elongated channel for squeezing.

[00104] Example 168 - The surgical tool assembly according to example 167, wherein the elongated channel is pivotally coupled to the distal support link by an end effector mounting assembly coupled to the elongated channel.

Embodiment 169 - A distal articulation member is configured for axial movement in first and second axes such that when the distal articulation member is moved in the first axis, a surgical The end effector for the device is articulated in a first articulation direction from a first non-articulated position to any one of the articulated positions and the distal articulation member is axially articulated in a second axial direction. When moved, the surgical end effector has been moved in a second articulation direction from any one of the articulated positions to the first non-articulated position, FIGS. , 164, 165, 166, 167, or 168.

Embodiment 170 - The surgical tool assembly extends surgically in a second articulation direction beyond a first non-articulated position when the distal articulation member is moved in a second axial direction. 169. The surgical tool assembly according to embodiment 169, further comprising means for preventing movement of the end effector.

[00100] Embodiment 171 - A surgical tool assembly comprising an elongated shaft assembly defining a shaft axis, a surgical end effector, a distal support link, and a distal articulation member. The surgical end effector includes an elongated channel configured to operably support a surgical staple cartridge therein and an anvil supported for movably movement relative to the surgical staple cartridge. A distal support link is pivotally coupled to the elongated channel to define an articulation axis transverse to the shaft axis about which the elongated channel articulates relative to the elongated shaft assembly. obtain. A distal support link is attached to the distal end of the elongated shaft assembly for axial and pivotal movement relative to the distal end of the elongated shaft assembly along the shaft axis. A distal articulation member is supported for axial movement on one side of the shaft axis, the distal articulation member pivotally coupled to the elongated channel and operative with the articulation source. interface to

[00100] Embodiment 172 - The proximal end of the distal support link defines a proximal axial slot configured to receive therein a corresponding articulation pin attached to the distal end of the elongated shaft assembly described above. 172. The surgical tool assembly of embodiment 171, comprising:

[00101] Embodiment 173 - A surgical tool assembly operably couples a proximal articulation member operatively interfacing with an articulation source, a proximal articulation member, and a proximal end of the distal articulation member 173. The surgical tool assembly according to Example 171 or 172, further comprising an articulation locking assembly for selectively locking the distal articulation member in an axial position.

[00109] Example 174 - The surgical tool assembly according to Example 173, wherein the proximal end of the distal articulation member is pivotally coupled to the joint lock assembly.

[00104] Example 175 - The surgical tool according to Example 171, 172, 173, or 174, wherein the distal support link is pivotally and axially movably coupled to the distal spine member of the elongated shaft assembly assembly.

Embodiment 176—The distal articulation member is configured to move in first and second axial directions such that when the distal articulation member is moved in the first axial direction, the surgical end When the effector is articulated in a first articulation direction from a first non-articulated position to any one of the articulated positions and the distal articulation member is moved in a second axial direction. 171, 172, 173, 174, or Surgical tool assembly according to 175.

Embodiment 177—The surgical tool assembly extends surgically in a second articulation direction beyond a first non-articulated position when the distal articulation member is moved in a second axial direction. 177. The surgical tool assembly according to embodiment 176, further comprising means for preventing movement of the end effector.

[00100] Embodiment 178 - A surgical tool assembly comprising an elongated shaft assembly defining a shaft axis and means for coupling a surgical end effector to a distal end of the elongated shaft assembly, whereby the surgical end The effector has an articulation axis transverse to the shaft axis, a non-articulated position in which the surgical end effector is aligned with the elongated shaft along the shaft axis, and an articulation located to one side of the shaft axis. means for coupling a surgical end effector to the distal end of the elongated shaft assembly that can be selectively articulated between motion positions; and means for applying articulation to the surgical end effector. surgical tool assembly. A means for coupling is coupled to the elongated shaft assembly for axial and pivotal movement relative to the elongated shaft assembly.

[00104] Embodiment 179 - The surgical tool assembly according to embodiment 178, wherein the means for applying is pivotally coupled to the surgical end effector at a position that is laterally offset from the shaft axis.

[00100] Embodiment 180 - The surgical tool assembly according to embodiment 178 or 179, wherein the means for applying further comprises means for selectively locking the surgical end effector in any one of the articulated positions .

Embodiment 181 - A surgical staple cartridge is configured to be supported in jaws of a surgical end effector, wherein at least one jaw of the surgical end effector is positioned relative to a second jaw of the surgical end effector to: It is movable between an open position and a closed position. The surgical end effector is moved from the unlocked configuration to the locked configuration to prevent axial movement of the firing member through the surgical end effector when the at least one jaw is moved to the closed position. Including locking member. The surgical end effector comprises a cartridge body dimensioned to be seated within the surgical end effector, the cartridge body having therein a plurality of surgical staples disposed within a staple line and a cam assembly. operably support. A cam assembly is moveable between a starting position and an ending position within the cartridge body, the cam assembly defining a central axis and a plurality of cam mechanisms thereon, each cam mechanism corresponding to a staple line. correspond to at least one of The cam assembly is laterally offset from the central axis and is in unlocking engagement with a corresponding portion of the locking member when the cartridge body is seated within the surgical end effector and the cam assembly is in the starting position. and at least one unlocking mechanism on the cam assembly, thereby configured to prevent the locking member from reaching the locked configuration when the at least one jaw is moved to the closed position. Prepare.

Embodiment 182 - The at least one unlocking mechanism includes a first unlocking ramp formed on the proximal end of the cam assembly at a position that is laterally offset to one side of the central axis; and a second unlocking ramp formed on the proximal end of the cam assembly at another location that is laterally offset opposite the axis.

[00183] Embodiment 183 - The surgical staple cartridge of embodiment 181 or 182, wherein each unlocking mechanism is configured to bias the locking member to the unlocked configuration.

Embodiment 184 - The proximal end of the cam assembly is configured to be engaged by the firing member as the firing member is advanced axially through the surgical end effector, the first unlocking ramp 183. The surgical staple cartridge of embodiment 182, defining a central contact area located between the second unlocking ramp and the second unlocking ramp.

[00100] Embodiment 185 - A surgical end effector comprising a first jaw, an anvil, a firing member, a locking member, and a surgical staple cartridge. An anvil is supported relative to the first jaw for selective movement relative to the first jaw between an open position and a closed position relative to each other. The firing member is supported for axial movement within the end effector between a start position and an end position upon application of firing and retraction motions. The locking member has a locked configuration in which the firing member is prevented from moving axially through the surgical end effector and an unlocked configuration in which the firing member is axially advanceable through the surgical end effector. can be moved between different configurations. A surgical staple cartridge includes a cartridge body and a cam assembly. The cartridge body is dimensioned to be seated within the first jaw, the cartridge body operably supporting a plurality of surgical staples disposed within the staple line therein. A cam assembly is moveable between a starting position and an ending position within the cartridge body, the cam assembly defining a central axis and including a plurality of cam mechanisms thereon, each cam mechanism for moving a staple line. correspond to at least one of The cam assembly is laterally offset from the central axis and is in unlocking engagement with a corresponding portion of the locking member when the cartridge body is seated in the first jaw and the cam assembly is in the starting position. and further comprising at least one unlocking mechanism on the cam assembly configured to thereby prevent the locking member from reaching the locked configuration when the anvil is moved to the closed position.

Embodiment 186 - The at least one unlocking mechanism includes a first unlocking ramp formed on the proximal end of the cam assembly at a position that is laterally offset to one side of the central axis; 186. The surgical end effector of embodiment 185, comprising a second unlocking ramp formed on the proximal end of the cam assembly at another location that is laterally offset opposite the axis.

Embodiment 187—The anvil is configured to move the locking member in the first direction into locking engagement with the firing member when the anvil is moved to the closed position, each unlocking mechanism having a corresponding 187. The surgical end effector according to example 185 or 186, configured to bias the flexing portion in a second direction opposite the first direction.

Embodiment 188 - The proximal end of the cam assembly is configured to be engaged by the firing member as the firing member is advanced axially through the surgical end effector, the first unlocking ramp 187. The surgical end effector of embodiment 186, defining a central contact area located between the second unlocking ramp and the second unlocking ramp.

Embodiment 189 - A surgical staple cartridge comprising an elongated slot configured to slidably receive the firing member therein when the firing member is moved between a start position and an end position; 185. The surgical end effector of embodiment 181, 182, 183, or 184, wherein is configured to axially align the firing member with the elongated slot.

Example 190 - The firing member comprises two sides and the locking member is configured to retainably engage each side of the firing member when the locking member is in the locked configuration, Example 185 , 186, 187, or 188.

Embodiment 191 - The locking member comprises a spring arm corresponding to each side of the firing member and a locking notch in each spring arm configured to releasably engage a corresponding locking lug on each side of the firing member. 191. A surgical end effector according to embodiment 190, comprising:

[00119] Embodiment 192 - The surgical end effector of embodiment 185, 186, 187, 188, 190, or 191, wherein the surgical end effector further comprises a tissue cutting surface on the firing member.

Example 193 - The anvil has an anvil body, an axial slot in the anvil body that allows a portion of the firing member to pass axially therethrough, and in the anvil body on each side of the axial slot. 193. The surgical end effector of example 185, 186, 187, 188, 190, 191, or 192, comprising an upper axial passage.

Embodiment 194 - A firing member extends laterally from the top of the firing member body and feet configured to slidably pass through corresponding passages in the first jaw and into the anvil body. a laterally extending anvil engagement mechanism configured to pass through a corresponding one of the axial passages of the first and second engagement mechanisms of the foot and the anvil; 194. A surgical end effector according to embodiment 193, positioned between the engagement mechanism.

Embodiment 195 - A surgical staple cartridge is configured to be supported in jaws of a surgical end effector that define a shaft axis, wherein at least one jaw of the surgical end effector is connected to a second jaw of the surgical end effector. It is movable with respect to the jaws between an open position and a closed position. The surgical end effector has a locked configuration in which the firing member is prevented from moving axially through the surgical end effector and a firing member is axially advanceable through the surgical end effector. A locking member is included that is movable between an unlocked configuration. A surgical staple cartridge is a cartridge body sized to be seated within one jaw of a surgical end effector, the cartridge body having therein a plurality of surgical staples arranged in a staple row. and staple camming means for camming the staples out of the cartridge body as the camming means is moved axially within the cartridge body from a start position to an end position. staple camming means for ejecting. The staple camming means is at least one corresponding portion of the locking member laterally offset from the shaft axis when the cartridge body is seated within the jaws of the surgical end effector and the staple camming means is in the starting position. to thereby prevent the locking member from reaching the locked configuration when the at least one jaw is moved to the closed position.

Example 196 - A method includes obtaining a first staple cartridge having a first row of staples and obtaining a second staple cartridge having a second row of staples, wherein the first staple and the second row of staples have the same length. The method is inserting a first staple cartridge into a channel having a key-shaped shape, wherein fully inserting the first staple cartridge into the channel is caused by interference between the key-shaped shape and the channel. being prevented; and inserting the second staple cartridge into the channel, wherein full insertion of the second staple cartridge into the channel is permitted by the key-shaped configuration; further includes

Example 197 - The method of example 196, wherein inserting the second staple cartridge into the channel further comprises aligning a keying feature on the second staple cartridge with a keying feature on the channel.

Example 198 - The method of example 196 or 197, wherein the method further comprises, when the first staple cartridge is inserted into the channel, the bottom surface of the first staple cartridge is spaced from the channel.

Example 199 - The method of example 198, further comprising positioning a bottom surface of the second staple cartridge in contact with the channel when the second staple cartridge is inserted into the channel .

Embodiment 200 - The method further includes the proximal portion of the first staple cartridge impeding clamping of the anvil against the distal portion of the first staple cartridge when the first staple cartridge is inserted into the channel , Example 196, 197, 198, or 199.

Example 201 - The method further comprises firing lockout of the first staple cartridge prevents a firing stroke when the first staple cartridge is inserted into the channel, Examples 196, 197, 198, 199 , or 200.

Embodiment 202 - A method comprising obtaining a first staple cartridge containing a first quantity of staples and obtaining a second staple cartridge containing the first quantity of staples. The method is inserting a first staple cartridge into a channel having a key-shaped feature, wherein full insertion of the first staple cartridge into the channel is prevented by the key-shaped feature. ., inserting the first staple cartridge into a channel having a key-shaped feature, wherein full insertion of the first staple cartridge into the channel is prevented by the key-shaped feature; Including further.

[00123] Example 203 - The method of example 202, wherein inserting the second staple cartridge into the channel further comprises aligning a keying feature on the second staple cartridge with a keying feature on the channel.

[00103] Example 204 - The method of example 202 or 203, wherein the method further comprises: the bottom surface of the first staple cartridge is spaced from the channel when the first staple cartridge is inserted into the channel.

Example 205 - The method of example 204, wherein the bottom surface of the first staple cartridge is spaced from the channel when the first staple cartridge is inserted into the channel.

Example 206 - The method further comprises preventing the first staple cartridge from clamping the anvil against the first staple cartridge when the first staple cartridge is inserted into the channel, example 202, 203, 204 , or the method of 205.

Example 207 - The method further comprises firing lockout of the first staple cartridge preventing a firing stroke when the first staple cartridge is inserted into the channel , or the method of 206.

Example 208—A method includes obtaining a channel, obtaining a matching staple cartridge including proximal and distal alignment protrusions, and placing the proximal alignment protrusions in corresponding proximal and aligning with the alignment mechanism. The method includes aligning the distal alignment protrusion with a corresponding distal alignment feature in the channel and interlocking the proximal alignment protrusion with the corresponding proximal alignment feature to achieve distal alignment. inserting the matching staple cartridge into the channel such that the projections interlock with the corresponding distal alignment features.

Example 209 - The method of example 208, wherein the bottom surface of the compatible staple cartridge is positioned in contact with the channel when the compatible staple cartridge is inserted into the channel.

[00130] Embodiment 210 - The method of embodiment 208 or 209, wherein the method further comprises a firing lockout of the matched staple cartridge preventing a firing stroke until the matched staple cartridge is inserted into the channel.

Example 211 - The method further comprises attempting to insert a mismatched staple cartridge into the channel, the mismatched staple cartridge further comprising an interference feature to a corresponding proximal alignment feature on the channel, Examples 208, 209, Or the method according to 210.

Example 212 - The method of example 211, wherein the bottom surface of the incompatible staple cartridge is spaced from the channel when the incompatible staple cartridge is inserted in the channel.

Example 213 - The method is described in Example 212, wherein the proximal portion of the non-conforming staple cartridge prevents clamping of the anvil against the distal portion of the non-conforming staple cartridge when the non-conforming staple cartridge is inserted into the channel the method of.

[00104] Example 214 - The method of example 211, 212, or 213, wherein the method further comprises the lockout preventing at least one surgical function when a non-compliant staple cartridge is positioned within the channel.

Example 215 - The channel comprises jaws of the end effector and the method further comprises aligning the sorting indicia on the end effector with the sorting indicia on the compatible staple cartridge, Examples 208, 209, 210, 211, 212 , 213, or 214.

Embodiment 216—A system comprising a replaceable staple cartridge and a channel configured to receive the replaceable staple cartridge. The replaceable staple cartridge includes a plurality of staples, a first downwardly projecting tab, and a second downwardly projecting tab. The channel includes a first container positioned and dimensioned to receive the first downwardly projecting tab and a second container positioned and dimensioned to receive the second downwardly projecting tab. a container;

Embodiment 217—A replaceable staples cartridge further comprising a cartridge body and a pan positioned about a portion of the cartridge body, the pan further comprising a base and having a first downwardly projecting tab and a second tab. 217. The system of embodiment 216, wherein the downwardly projecting tabs project from the base.

[00123] Example 218 - The system of example 217, wherein the first downwardly projecting tab and the second downwardly projecting tab are constructed of metal.

Example 219 - According to example 216, 217, or 218, wherein the replaceable staple cartridge further comprises a first laterally extending lug and a second laterally extending lug system.

Embodiment 220 - A replaceable staple cartridge has a first sidewall comprising a first cutout positioned and positioned to receive a first laterally extending lug. A first sidewall dimensioned and a second sidewall having a second cutout, the second cutout positioned to receive the second laterally extending lug. and a second sidewall that is dimensioned.

Embodiment 221 - A replaceable staple cartridge further comprising a molded cartridge body, wherein the first laterally extending lug and the second laterally extending lug are formed in the molded cartridge body 221. The system of embodiment 220, wherein the feature is

[00123] Example 222 - The system of example 221, wherein the cartridge body is constructed of a plastic material.

Example 223 - The first laterally extending lug and the second laterally extending lug are located distal to the first downwardly projecting tab and the second downwardly projecting tab 223. The system of example 219, 220, 221, or 222, wherein:

Example 224—A system comprising a replaceable staple cartridge and a channel configured to receive the replaceable staple cartridge. A replaceable staple cartridge includes a plurality of staples and an outer surface including a plurality of ribs. The channel includes a plurality of slots, each slot configured to receive one of the ribs.

[00104] Example 225 - The system of example 224, wherein the plurality of ribs includes a first rib and a second rib.

Embodiment 226 - The plurality of slots comprises a first slot and a second slot, and the channel comprises a first sidewall comprising the first slot and a second sidewall comprising the second slot 225. The system of embodiment 225, further comprising.

[00104] Example 227 - The system of example 224, 225, or 226, wherein the replaceable staple cartridge further comprises a molded cartridge body, and wherein the rib is a molded feature of the molded cartridge body.

[00103] Embodiment 228 - To embodiment 224, 225, 226, or 227, wherein the replaceable staple cartridge further comprises a first laterally extending lug and a second laterally extending lug System as described.

Example 229 - The channel is a first sidewall comprising a first cutout, the first cutout positioned and dimensioned to receive the first laterally extending lug and a second sidewall having a second cutout, the second cutout positioned and dimensioned to receive the second laterally extending lug. 229. The system of example 224, 225, 226, 227, or 228, further comprising: a second sidewall.

Embodiment 230—The replaceable staple cartridge further comprises a molded cartridge body, wherein the first laterally extending lug and the second laterally extending lug are within the molded cartridge body The system of example 229, which is molded.

[00133] Example 231 - The system of example 230, wherein the molded cartridge body is constructed of a plastic material.

[00139] Example 232 - The system of example 231, wherein the first laterally extending lug and the second laterally extending lug are located distal to the rubs.

Example 233 - A system comprising an adapted staple cartridge comprising a plurality of staples and a channel. The system is a means for allowing full insertion of the compatible staple cartridge and preventing full insertion of the non-compatible staple cartridge into the channel, wherein the non-compatible staple cartridge and the compatible staple cartridge are of the same length. means having the same length and width.

[00139] Example 234 - The system of example 233, wherein the means comprises a proximal alignment key and a distal alignment key.

[00104] Embodiment 235 - The system of embodiment 233 or 234, wherein the system further comprises a second channel, and wherein the non-conforming staple cartridge is adapted to the second channel.

Example 236 - A system comprising a replaceable staple cartridge and a channel configured to receive the replaceable staple cartridge. The replaceable staple cartridge comprises a plurality of staples, a proximal laterally projecting lug, and a distal laterally projecting lug. The channel includes a proximal reservoir positioned and dimensioned to receive the proximal laterally projecting lugs and a distal container positioned and dimensioned to receive the distal laterally projecting lugs. and a sidewall comprising a container.

Example 237 - The channel further comprises an obstruction and the replaceable staple cartridge further comprises a complementary anti-obstruction positioned and dimensioned to overcome the obstruction, Example 236 The system described in .

[00109] Embodiment 238 - The system of embodiment 237, wherein the system further comprises a second replaceable staple cartridge comprising a non-complementary obstruction stop positioned and dimensioned to interfere with the obstruction.

[00139] Example 239 - The system of example 236, 237, or 238, wherein the proximal container defines a cutout in the sidewall, the cutout including the recess and the protrusion.

[00103] Example 240 - The system of example 239, wherein the projection is positioned within the recess.

Example 241 - A second exchange, the system comprising a second plurality of staples, a second proximal laterally projecting lug, and a second distal laterally projecting lug 241. The system of example 236, 237, 238, 239, or 240, further comprising a staple cartridge.

Embodiment 242—The second distal laterally projecting lug is spaced a distance from the second proximal laterally projecting lug, the distance being the proximity of the replaceable staple cartridge. 242. The system of embodiment 241, wherein the first distance between the proximal laterally projecting lug and the distal laterally projecting lug is different.

Example 243 - The second distal laterally projecting lug coincides with the distal laterally projecting lug and the second proximal laterally projecting lug is proximal laterally projecting 243. The system of embodiment 241 or 242, wherein the lug is different.

Embodiment 244 - The second replaceable staple cartridge further comprises a deck, the channel further comprises a bottom surface, the deck against the bottom surface when the second replaceable staple cartridge is positioned within the channel The system of example 241, 242, or 243, which is obliquely oriented.

[00103] Example 245 - The system of example 241, 242, 243, or 244, wherein the replaceable staple cartridge and the second replaceable staple cartridge have the same width and the same length.

[00103] Example 246 - The system of example 241, 242, 243, 244, or 245, wherein the plurality of staples and the second plurality of staples comprise the same amount of staples.

Example 247 - Examples 236, 237, 238, 239, 240, 241, 242, 243 wherein the distal laterally projecting lugs have a different geometry than the proximal laterally projecting lugs , 244, 245, or 246.

[00109] Example 248 - The system of example 247, wherein the proximal laterally projecting lugs comprise wedges.

[00149] Example 249 - The system of example 247 or 248, wherein the proximal laterally projecting lugs comprise cutouts that mate with protrusions in the proximal container.

Embodiment 250—A proximal laterally projecting lug projects from a first side of the replaceable staple cartridge and a distal laterally projecting lug projects from a second side of the replaceable staple cartridge , Examples 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, or 249.

Embodiment 251 - An embodiment wherein the replaceable staple cartridge further comprises a deck, the channel further comprises a bottom surface, the deck being parallel to the bottom surface when the replaceable staple cartridge is positioned within the channel 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 249, or 250.

Example 252 - A system comprising a channel with an obstruction and a complementary obstruction stop positioned and dimensioned to complement the obstruction when a compatible staple cartridge is received within said channel and a non-compatible staple cartridge comprising a non-complementary obstruction stop positioned and dimensioned to interfere with the obstruction when the non-compatible staple cartridge is received within the channel; system.

[00104] Example 253 - The system of Example 252, wherein the conforming staple cartridge and the non-conforming staple cartridge comprise rows of staples of the same length.

[00103] Embodiment 254 - The system of embodiment 252 or 253, wherein the conforming staple cartridge and the non-conforming staple cartridge comprise the same amount of staples.

[00133] Example 255 - The system of example 252, 253, or 254, wherein the obstacle further comprises a cutout comprising a recess and a protrusion.

Example 256 - A conforming staple cartridge comprising a first quantity of staples, a nonconforming staple cartridge comprising a first quantity of staples, and a channel permitting complete insertion of the conforming staple cartridge, the nonconforming staple cartridge a channel comprising means for preventing full insertion into the channel.

Embodiment 257—A system, an end effector configured to receive a compatible replaceable staple cartridge, the end effector comprising a first outer surface, wherein the end effector's classifying identification is a first A matching replaceable staple cartridge comprising an end effector imprinted on one outer surface has a second outer surface and a matching replaceable staple cartridge classification identification on the second outer surface. The system wherein the classification identification on the compatible replaceable staple cartridge corresponds to the classification identification on the end effector.

Embodiment 258—The system further comprises a mismatched replaceable staple cartridge, the mismatched replaceable staple cartridge comprising a third outer surface, and the mismatched replaceable staple cartridge classification identification indicia on the third outer surface 258. The system of example 257, wherein the classification identification of the matching replaceable staple cartridge positioned on the surface is different than the classification identification of the end effector.

[00104] 259 - The system of embodiment 257 or 258, wherein the end effector further comprises a distal portion and the end effector's classification identification is positioned on the distal portion.

[00104] 260 - The system of embodiment 259, wherein the end effector further comprises an anvil, and the end effector's classification identification is positioned on the distal end of the anvil.

Embodiment 261 - The end effector further comprises an anvil comprising a pair of tissue stops, and wherein the end effector's secondary classification identification is positioned on each of the tissue stops, embodiment 257, 258, 259, or 260 The system described in .

Example 262 - A conforming replaceable staple cartridge further comprising a wedge-shaped distal nose, wherein the classification identification of the conforming replaceable staple cartridge is on the wedge-shaped distal nose 262. The system of example 257, 258, 259, 260, or 261, wherein the system is positioned at

[00104] Example 263 - The system of Example 257, 258, 259, 260, 261, or 262, wherein the end effector classification identification and the matching replaceable staple cartridge classification identification include the same alphanumeric characters.

[00109] Example 264 - The system of Example 263, wherein the same alphanumeric characters indicate the length of the resulting staple line fired from the matching replaceable staple cartridge.

[00104] Example 265 - The system of Example 264, wherein the same alphanumeric characters indicate the type of end effector.

Example 266—To Example 257, 258, 259, 260, 261, 262, 263, 264, or 265, wherein the end effector classification identification and the matching replaceable staple cartridge classification identification include the same shape System as described.

Embodiment 267 - The classification identification on the end effector and the classification identification on the matching replaceable staple cartridge comprise the same color, or 266. The system according to H.266.

[00101] [00400] Embodiment 268 - The system further comprises a lockout configured to prevent at least one surgical function unless a compatible replaceable staple cartridge is positioned within the end effector, embodiments 257, 258, 259, 260, 261, 262, 263, 264, 265, 266, or 267.

[00101] Embodiment 269 - A system comprising an end effector configured to receive a compatible replaceable staple cartridge, the end effector comprising a first distal end comprising a cartridge compatibility indicator , a compatible replaceable staple cartridge comprising a plurality of staples, the compatible replaceable staple cartridge comprising a second distal end comprising an end effector compatibility indicator.

[00104] Example 270 - The system of example 269, wherein the cartridge compatibility indicator is embossed on the outer surface of the end effector.

[00104] Example 271 - The system of Example 270, wherein the end effector compatibility indicator is embossed on the outer surface of the compatible replaceable staple cartridge.

[00103] Example 272 - According to example 269, 270, or 271, wherein the cartridge compatibility indicator longitudinally overlaps the end effector compatibility indicator when a compatible replaceable staple cartridge is positioned within the end effector system.

Example 273 - A system comprising an end effector configured to receive a compatible replaceable staple cartridge, the end effector comprising a first outer surface comprising a first cord, a replaceable staple cartridge comprising a plurality of staples and a second outer surface, the second outer surface comprising a second code, the second code matching the first code.

[00104] Example 274 - The system of Example 273, wherein the first code is embossed on the first outer surface and the second code is embossed on the second outer surface.

[00104] Embodiment 275 - The system of embodiment 273 or 274, wherein the first code and the second code indicate the length of the compatible replaceable staple cartridge.

[00104] Example 276 - The system of example 273, 274, or 275, wherein the first code and the second code comprise at least one number and at least one letter.

Although many of the surgical tool systems described herein operate with electric motors, the surgical tool systems described herein can operate in any suitable manner. In various instances, the surgical instrument systems described herein can be operated by, for example, manually operated triggers. In certain examples, the motors disclosed herein may comprise part of a robotic control system. Additionally, any of the end effectors and/or tool assemblies disclosed herein can be utilized with robotic surgical instrument systems. U.S. patent application Ser. disclosed in detail.

Although the surgical instrument systems described herein are described in connection with the deployment and deformation of staples, the embodiments described herein are not so limited. Various embodiments are also envisioned that deploy fasteners other than staples, such as clamps or tacks. Further, various embodiments are envisioned utilizing any suitable means for sealing tissue. For example, an end effector according to various embodiments may include electrodes configured to heat and seal tissue. Also for example, an end effector according to certain embodiments can apply vibrational energy to seal tissue.

The entire disclosure of the following is incorporated herein by reference.
- U.S. Patent No. 5,403,312, issued Apr. 4, 1995, entitled "ELECTROSURGICAL HEMOSTATIC DEVICE";
- U.S. Patent No. 7,000,818, issued Feb. 21, 2006, entitled "SURGICAL STAPLING INSTRUMENT HAVING SEPARATE DISTINCT CLOSING AND FIRING SYSTEMS";
- U.S. Patent No. 7,422,139, issued September 9, 2008, entitled "MOTOR-DRIVEN SURGICAL CUTTING AND FASTENING INSTRUMENT WITH TACTILE POSITION FEEDBACK";
- U.S. Patent No. 7,464,849, issued December 16, 2008, entitled "ELECTRO-MECHANICAL SURGICAL INSTRUMENT WITH CLOSURE SYSTEM AND ANVIL ALIGNMENT COMPONENTS";
- U.S. Patent No. 7,670,334, issued March 2, 2010, entitled "SURGICAL INSTRUMENT HAVING AN ARTICULATING END EFFECTOR";
- U.S. Patent No. 7,753,245, issued July 13, 2010, entitled "SURGICAL STAPLING INSTRUMENTS";
- U.S. Patent No. 8,393,514, issued March 12, 2013, entitled "SELECTIVELY ORIENTABLE IMPLANTABLE FASTENER CARTRIDGE";
- U.S. patent application Ser.
- US patent application Ser.
- U.S. Patent Application No. 12/031,873, filed February 15, 2008, entitled "END EFFECTORS FOR A SURGICAL CUTTING AND STAPLING INSTRUMENT", now U.S. Patent No. 7,980,443;
- US patent application Ser.
- U.S. patent application Ser.
- U.S. patent application Ser.
- US patent application Ser.
- US patent application Ser.
- U.S. patent application Ser.
- US patent application Ser.
- U.S. Patent Application No. 13/800,025, filed March 13, 2013, entitled "STAPLE CARTRIDGE TISSUE THICKNESS SENSOR SYSTEM," now U.S. Patent Application Publication No. 2014/0263551;
- U.S. Patent Application No. 13/800,067, filed March 13, 2013, entitled "STAPLE CARTRIDGE TISSUE THICKNESS SENSOR SYSTEM", now U.S. Patent Application Publication No. 2014/0263552;
- U.S. Patent Application Publication No. 2007/0175955, filed January 31, 2006, entitled "SURGICAL CUTTING AND FASTENING INSTRUMENT WITH CLOSURE TRIGGER LOCKING MECHANISM," and
- U.S. Patent Application Publication No. 2010/0264194, filed April 22, 2010, entitled "SURGICAL STAPLING INSTRUMENT WITH AN ARTICULATABLE END EFFECTOR," now U.S. Patent No. 8,308,040.

Although various instruments have been described herein with particular embodiments, modifications and changes may be made to those embodiments. The particular features, structures or characteristics may be combined in any suitable manner in one or more embodiments. Thus, any particular feature, structure, or characteristic illustrated or described with respect to one embodiment may be combined, in whole or in part, without limitation with the features, structures, or characteristics of one or more other embodiments. may Also, although materials are disclosed for particular components, other materials may be used. Further, according to various embodiments, single components may be replaced with multiple components, and multiple components may be replaced with a single component to perform a given function(s). may be replaced. The foregoing description and the following claims are intended to cover all such modifications and variations.

The devices disclosed herein can be designed to be discarded after a single use, or can be designed to be used multiple times. In either case, however, the device can be reconditioned for reuse after at least one use. Reconditioning can include, but is not limited to, any combination of disassembly of the device, followed by cleaning or replacement of particular parts of the device, and subsequent reassembly of the device. Specifically, the reconditioning facility and/or surgical team can disassemble the device, clean and/or replace certain parts of the device, and then reassemble the device for subsequent use. can be done. Those skilled in the art will appreciate that reconditioning of the device can utilize a variety of techniques for disassembly, cleaning/replacement, and reassembly. Use of such techniques, and the resulting reconditioned device, are all within the scope of the present application.

The devices disclosed herein can be processed pre-operatively. Initially, a new or used instrument may be obtained and cleaned as necessary. The instruments can then be sterilized. In one sterilization technique, the instrument is placed in a closed and sealed container, such as a plastic bag or TYVEK bag. The container and instrument can then be placed in a radiation field that can penetrate the container, such as gamma rays, X-rays, and/or high-energy electrons. Radiation can kill bacteria on the device and in the container. The sterilized instrument can then be stored in the sterile container. The sealed container can keep the instrument sterile until it is opened in the medical facility. The device may also be sterilized using any other technique known in the art including, but not limited to, beta radiation, gamma radiation, ethylene oxide, hydrogen peroxide plasma, and/or water vapor.

While this invention has been described as having an exemplary design, the present invention may be further modified within the spirit and scope of this disclosure. This application is therefore intended to cover any variations, uses, or adaptations of the invention using its general principles.

All patents, publications, or other disclosures that are incorporated herein in whole or in part by reference to any existing definitions, statements, or other disclosures in which the incorporated material is set forth in this disclosure. It is incorporated herein only to the extent not inconsistent with its content. As such, and to the extent necessary, the disclosure as explicitly set forth herein supersedes any conflicting statements incorporated herein by reference. Any content, or portion thereof, that is inconsistent with the current definitions, opinions, or other disclosures set forth herein, is hereby incorporated by reference, but the reference content and the current disclosure are hereby incorporated by reference. References shall be made only to the extent that there is no inconsistency between

[Mode of implementation]
(1) A surgical tool assembly comprising:
a first jaw;
a second jaw movably supported on said first jaw for selective movement relative to said first jaw between an open position and a closed position about a fixed pivot axis; and wherein the surgical tool assembly further comprises a shaft assembly defining a shaft axis, the shaft assembly comprising an axially movable closure member, the axially movable closure member comprising: an initial closing movement relative to said cam surface in a first closing direction perpendicular to said cam surface when said closing member is axially advanced over a cam surface on said second jaw; and an additional closing motion in a second closing direction parallel to the shaft axis against the surface.
(2) said cam surfaces are formed on second jaw mounting portions, said second jaws each pivoting to said first jaw for selective pivotal movement about said pivot axis; Embodiment 1. The surgical tool assembly of Embodiment 1, further comprising first and second mounting walls movably attached.
(3) the axially movable closure member includes a distal end surface and a distal camming surface configured to cammingly engage the camming surface on the second jaw; Clause 1. The surgical tool assembly of Clause 1, comprising a closed tube.
(4) the distal end surface is configured to apply the initial closing motion to the camming surface, and the distal camming surface is configured to apply the additional closing motion to the camming surface; 4. A surgical tool assembly according to claim 3.
(5) the distal end surface includes a portion of the cross-sectional thickness of the obturator tube, and the camming surface extends from the distal end surface and includes another portion of the cross-sectional thickness of the obturator tube; 5. A surgical tool assembly according to embodiment 4.

(6) The closed tube is
an outer surface;
an inner surface;
a distal end defining said distal end surface, said distal camming surface extending from said distal end surface to said inner surface at an obtuse angle to said distal end surface. A surgical tool assembly as described in .
(7) said shaft assembly is axially movable between said first mounting wall and said second mounting wall and is selectively axially movable between a start position and an end position; Clause 3. The surgical tool assembly of Clause 2, further comprising a moveable firing member.
Clause 8. The surgical tool assembly of clause 7, wherein at least a portion of the firing member is proximal to the cam surface when the firing member is in the starting position.
(9) a surgical tool assembly comprising:
an end effector,
an elongated channel configured to operably support a surgical staple cartridge therein;
an anvil comprising an anvil mounting portion movably supported on said elongated channel for selective movement relative to said elongated channel between open and closed positions about a fixed pivot axis; The surgical tool assembly comprises an end effector comprising:
Further comprising a shaft assembly defining a shaft axis, the shaft assembly comprising an axially moveable closure member, said axially moveable closure member having said closure member contacting a camming surface on said anvil mounting portion. When axially advanced above, an initial closing movement relative to the cam surface in a first closing direction perpendicular to the cam surface and a second closing movement relative to the cam surface parallel to the shaft axis. an additional closing motion in two closing directions.
(10) the anvil further comprises first and second anvil mounting walls each pivotally attached to the elongated channel for selective pivotal movement about the pivot axis; 10. A surgical tool assembly according to claim 9.

(11) the axially movable closure member includes a distal end surface and a distal camming surface configured to cammingly engage the camming surface on the anvil mounting portion; 10. A surgical tool assembly according to embodiment 9, comprising a tube.
(12) the distal end surface is configured to apply the initial closing motion to the camming surface, and the distal camming surface is configured to apply the additional closing motion to the camming surface; 12. A surgical tool assembly according to claim 11.
(13) the distal end surface includes a portion of the cross-sectional thickness of the obturator tube, and the camming surface extends from the distal end surface and includes another portion of the cross-sectional thickness of the obturator tube; 13. A surgical tool assembly according to embodiment 12.
(14) the shaft assembly is selectively axially movable between the first anvil mounting wall and the second anvil mounting wall between a start position and an end position; 11. The surgical tool assembly according to embodiment 10, further comprising a directionally movable firing member.
Clause 15. The surgical tool assembly of clause 14, wherein at least a portion of the firing member is proximal to the cam surface when the firing member is in the starting position.

(16) A surgical tool assembly comprising:
an end effector,
an elongated channel configured to operably support a surgical staple cartridge therein;
an anvil movably comprising an anvil mounting portion supported on said elongated channel for selectively moving between an open position and a closed position relative to said elongated channel. , the surgical tool assembly comprising:
a shaft assembly defining a shaft axis and comprising an axially movable closure member;
first closing means on said closure member for applying an initial closing motion to a cam surface on said anvil mounting portion in a first closing direction perpendicular to said cam surface;
on the closure member for applying an additional closing motion in a second closing direction parallel to the shaft axis to the cam surface when the closure member is axially advanced over the cam surface; a second closure means for the surgical tool assembly.
(17) said first closure means includes a distal camming surface on a portion of the distal end of said closure member and said second closure means comprises a distal cam surface on another portion of said distal end; 17. The surgical tool assembly of embodiment 16, including a distal camming surface extending from said distal camming surface at an obtuse angle to said distal camming surface.
(18) said cam surfaces are formed on anvil mounting portions, said anvils being pivotally mounted respectively in said elongated channels for selective pivotal movement about said pivot axis; 17. The surgical tool assembly according to embodiment 16, further comprising first and second mounting walls.
(19) said shaft assembly is axially movable between said first mounting wall and said second mounting wall and is selectively axially movable between a start position and an end position; 19. The surgical tool assembly according to embodiment 18, further comprising a moveable firing member.
Clause 20. The surgical tool assembly of clause 19, wherein at least a portion of the firing member is proximal to the cam surface when the firing member is in the starting position.

Claims (15)

A surgical tool assembly comprising:
a first jaw;
a second jaw movably supported on said first jaw for selective movement relative to said first jaw between an open position and a closed position about a fixed pivot axis; and wherein the second jaw has a proximal camming surface oriented at a first camming angle with respect to the outer surface of the second jaw and a camming surface with respect to the outer surface of the second jaw and a distal cam surface oriented at a second cam angle, the first cam angle being steeper than the second cam angle, the surgical tool assembly defining a shaft axis. further comprising a shaft assembly, said shaft assembly comprising an axially movable closure member, said axially movable closure member comprising:
a distal end surface;
a distal camming surface;
the distal camming surface extends from the distal end surface;
As the closure member is advanced axially distally, at least one of the distal end surface and a line or point of intersection between the distal end surface and the distal camming surface aligns with the second camming surface. configured to apply an initial closing force against the proximal camming surface on the jaws, such that as the closure member is further axially advanced distally, the distal camming surface engages the distal cam; A surgical tool assembly configured to apply an additional closing force against a surface. said second jaw comprising a second jaw body portion and a second jaw mounting portion extending proximally from said second jaw body portion, said proximal camming surface and said distal camming surface; are formed on said second jaw mounting portions, said second jaws each pivotally attached to said first jaw for selective pivotal movement about said fixed pivot axis. The surgical tool assembly of claim 1, further comprising first and second mounting walls that are mounted. The surgical tool assembly according to claim 1, wherein the axially movable closure member comprises a closure tube including the distal end surface and the distal camming surface. As the closure member is advanced axially and distally to initiate the closure process, the distal end surface and the line of intersection or intersection between the distal end surface and the distal camming surface. at least one first contacting the proximal cam surface on the second jaw;
The surgical tool assembly according to claim 1, wherein the additional closing force moves the second jaw to the closed position. The surgical tool assembly of claim 3, wherein the distal end surface includes a portion of the cross-sectional thickness of the obturator tube and the distal camming surface includes another portion of the cross-sectional thickness of the obturator tube. The closed tube is
an outer surface;
an inner surface;
a distal end defining said distal end surface, said distal camming surface extending from said distal end surface to said inner surface at an obtuse angle to said distal end surface. A surgical tool assembly as described in . The shaft assembly is axially movable between the first mounting wall and the second mounting wall and is selectively axially movable between a start position and an end position. The surgical tool assembly according to claim 2, further comprising a firing member. The surgical tool assembly of claim 7, wherein at least a portion of the firing member is proximal of the proximal camming surface when the firing member is in the starting position. A surgical tool assembly comprising:
an end effector,
an elongated channel configured to operably support a surgical staple cartridge therein;
an anvil comprising an anvil mounting portion movably supported on said elongated channel for selective movement relative to said elongated channel between open and closed positions about a fixed pivot axis; wherein the anvil mounting portion has a proximal camming surface oriented at a first cam angle with respect to the outer surface of the anvil mounting portion, and with respect to the outer surface of the anvil mounting portion a distal cam surface oriented at a second cam angle, the first cam angle being steeper than the second cam angle, the surgical tool assembly comprising:
further comprising a shaft assembly defining a shaft axis, said shaft assembly comprising an axially movable closure member, said axially movable closure member comprising:
a distal end surface;
a distal camming surface extending from the distal end surface;
As the closure member is advanced axially distally, at least one of the distal end surface and a line or point of intersection between the distal end surface and the distal camming surface aligns with the anvil mounting portion. configured to apply an initial closing force against the proximal camming surface above such that when the closure member is further axially advanced distally, the distal camming surface is adapted to contact the distal camming surface; a surgical tool assembly configured to apply an additional closing force to the The anvil further comprises first and second anvil mounting walls each pivotally attached to the elongated channel for selective pivotal movement about the fixed pivot axis. 10. The surgical tool assembly of paragraph 9. The surgical tool assembly according to claim 9, wherein the axially movable closure member comprises a closure tube including the distal end surface and the distal camming surface. As the closure member is advanced axially distally to initiate the closure process, the distal end surface and the line of intersection or intersection between the distal end surface and the distal camming surface. at least one first contacting the proximal cam surface on the anvil mounting portion;
The surgical tool assembly according to claim 9, wherein the additional closing force moves the anvil to the closed position. The surgical tool assembly of claim 11, wherein the distal end surface includes a portion of the cross-sectional thickness of the obturator tube and the distal camming surface includes another portion of the cross-sectional thickness of the obturator tube. . The shaft assembly is axially movable between the first anvil mounting wall and the second anvil mounting wall and is selectively axially movable between a start position and an end position. The surgical tool assembly of Claim 10, further comprising a capable firing member. The surgical tool assembly according to claim 14, wherein at least a portion of the firing member is proximal to the proximal camming surface when the firing member is in the starting position.

Images