US3835934A - Impact wrench with automatic shut-off - Google Patents

Impact wrench with automatic shut-off Download PDF

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Publication number
US3835934A
US3835934A US00328679A US32867973A US3835934A US 3835934 A US3835934 A US 3835934A US 00328679 A US00328679 A US 00328679A US 32867973 A US32867973 A US 32867973A US 3835934 A US3835934 A US 3835934A
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US
United States
Prior art keywords
shut
slide
valve
passage
impact wrench
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00328679A
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English (en)
Inventor
K Schoeps
T Gustavsson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Atlas Copco AB
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Atlas Copco AB
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Filing date
Publication date
Application filed by Atlas Copco AB filed Critical Atlas Copco AB
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Publication of US3835934A publication Critical patent/US3835934A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
    • B25B23/145—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for fluid operated wrenches or screwdrivers
    • B25B23/1453—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for fluid operated wrenches or screwdrivers for impact wrenches or screwdrivers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C11/00—Pivots; Pivotal connections
    • F16C11/04—Pivotal connections
    • F16C11/10—Arrangements for locking
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/32—Articulated members
    • Y10T403/32254—Lockable at fixed position
    • Y10T403/32262—At selected angle
    • Y10T403/32319—At selected angle including pivot stud
    • Y10T403/32327—At selected angle including pivot stud including radially spaced detent or latch component
    • Y10T403/32336—Engaging notch or recess in outer periphery of component

Definitions

  • a pivotmounted arm forms an outer race for the ball, and the races diverge in the direction of the rotary impacts so that, at its rolling movement created by the rebound of the hammer, the ball forces the arm to swing.
  • the arm forces a trigger for a shut-off valve to release the shutoff valve for movement into its position for shutting off the supply of motive fluid, and the motor stops.
  • a conventional freewheel clutch is connected to the rotor of the sliding vane motor.
  • the clutch catches hold of the rotor and swings an arm which initiates the closing of the valve when the rebound amplitude reaches a predetermined value.
  • it is difficult to provide for a reverse running without negatively influencing the endurance of the rebound measuring device.
  • FIG. 1 is a longitudinal section taken substantially along line 1-1 in FIG. 2 and 3,
  • FIGS. 2-5 are cross sections taken along lines 2-2, 33 and 44, respectively, in FIG. 1,
  • FIGS. 5 and 6 show on an enlarged scale and in other relative positions some details in FIG. 3,
  • FIG. 7 is a section taken along line 77 in FIG. 5,
  • FIG. 8 shows a detail in FIG. 1,
  • FIG. 9 is a section taken along line 99 in FIGS. 1 and 3 but showing a modified form of some details
  • FIG. 10 is a section taken substantially along line 1010 in FIG. 9, and
  • FIG. 11, finally, is a section corresponding to FIG. 9 but some of the details are in another position.
  • the impact wrench in the figures has a housing 11 which in general consists of an intermediate portion 12 with an integral handle 13, a back end portion 14 and a front end portion 15, all held together by three screws.
  • a drive square 16 protrudes from the housing.
  • a nut socket can be attached directly on to the drive square, but usually a torsion bar 17 is inserted between the drive square and the nut socket 18.
  • the drive square is part of a rotatable anvil 19 which extends rearwardly into a hammer 20 adapted to deliver rotary impacts to the anvil so as to rotate the latter.
  • the hammer 20 is connected to a rotor of a pneumatic sliding vane motor 21 which consists of a cylinder 22, two end plates 23,24, and the rotor 25 which is journalled by means of roller bearings 26,27 in the end plates.
  • the rotor 25 has six radial slots for vanes 28.
  • the cylinder 22 has two combined inlet/outlet ports 29,30 which through supply/exhaust passages 31, 32 are connected to a selector valve 33 which is connected to a supply valve 34 in the handle 13 and to two forwardly directed alternative exhaust passages 35,36 as well.
  • the supply valve is supplied with compressed air through a passage 37 which is connected to a non-illustrated air hose.
  • shut-off valve 38 in the form of a slide which is loaded towards its open position by a spring 39. It has an end chamber 40 which is connected to the supply passage 31 through a bore 41 in the slide 38 so that the latter is loaded to the right by the air pressure when the supply passage 31 is pressurized.
  • the spring 39 is weak enough to be overcome by the air pressure.
  • the shut-off slide 38 is normally retained in its open position (shown in FIG. 1) by a retainer slide or trigger 42 which is loaded towards a locking position by a spring 43 as well as by the air pressure in an end chamber 44 which through a passage 45 is connected to a mouth 46 that is controlled by the shut-off slide 38.
  • the retainer slide 42 has a shoulder in the form of a screw 47 which abuts the outer end of an arm 48 so as to force the latter to the left in FIG. 3.
  • the arm is pivot-mounted in the housing on a pin 49 which is eccentric on a turnable axle 50.
  • a cylindrical member 52 is affixed to the rear stub shaft 51 of the rotor 25 by means of a screw 53 and a pin 54.
  • This member 52 has an annular groove 55 which fonns an inner race for a ball 56 to which a recess 57 in the arm 48 forms an outer race.
  • the races 55,57 diverge clockwise somewhat in the figures.
  • a knife 58 loaded by a spring 61, is journalled on a pin 59 and extends into a slot 60 in the arm 48 so as to bias the ball 56 into the position it takes up in FIG. 3.
  • the knife 58 can be lifted to the position shown in FIGS. 5 and 6 by a piston 62 which pushes a pin 63 on the knife.
  • the piston 62 lifts the knife 58 when loaded by compressed air through a passage 64 which, like the passage 45, is connected to the mouth 46.
  • the selector valve 33 shall be in its position shown in FIG. 2. Since the supply valve 34 is closed, the shut-off slide 38 is in its position shown in FIG. 1 owing to the spring 39, and it is retained there by the spring-biased retainer slide 42.
  • the supply valve 34 is opened, the passage 31 is pressurized while the passage 32 is connected as an exhaust passage and the motor starts rotating clockwise so that the hammer 20 will deliver rotary impacts to the anvil 19.
  • the piston 62 will lift the knife 58 to the position shown in FIG. 5 simultaneously with the motor starting its rotation. If the joint has some elasticity, the resistance to rotation will gradually increase and the hammer will start rebounding counter-clockwise after each impact.
  • the rotor 25 and the cylindrical member 52 on the rear stub shaft 51 of the rotor will rebound conjointly with the hammer.
  • the ball 56 will therefore roll counter-clockwise as the hammer rebounds and it will force the arm 48 to swing at every rebound.
  • the arm 48 swings back again as the rotor 25 again starts rotating clockwise and the ball 56 rolls back to its normal position.
  • the rebound will force the arm 48 to move the retainer slide 42 completely out of register with the shut-off slide 38, and because of the air pressure in the end chamber 40 of the shut-off slide 38, this slide 38 will switch over to its closed position so that the impact wrench immediately stops working. Since the passage 31 is oblique to the slide 38, the end chamber 40 will maintain pressurized through the bore 41 in the slide 38 also when the slide has switched over to is closed position.
  • shut-off slide 38 When the supply valve is released, i.e. has taken up its closed position, the end chamber 40 of the shut-off slide 38 is vented by means of leakage in the selector valve 33 so that the shut-off slide 38 moves back to its open position shown in FIG. 1. During this movement, the shutoff slide 38 opens the mouth 46 so that the piston 62 is vented so as to permit the knife 58 to return the ball 56 to its normal position shown in FIG. 3 by the action of the spring 61. As a result of the ball 56, the spring loaded retainer slide 42 again locks the shut-off slide 38 in its open position, and the impact wrench is ready for another operation.
  • the selector valve 33 shall be moved to the left in FIG. 2 so that the passage 32 will be the supply passage and the passage 31 the exhaust passage.
  • the knife 58 Upon actuation of the supply valve 34, the knife 58 will not be lifted since the opening 46 has only exhaust pressure and the knife 58 will therefore positively hold the ball 56 in the normal position.
  • the impact wrench will operate also if the knife 58 is dispensed with, since the shut-off slide 38 will remain in its open position during the reverse rotation due to its end chamber 40 having only exhaust pressure so that the spring 39 is able to retain the shut-off slide 38 open also if the retainer slide 42 is moved out of its locking position by the arm 48.
  • the ball 56 can be in such a position that the shut-off slide 38 is not locked in its open position by the retainer slide 42 and in that case the supply valve 34 must be actuated twice before the wrench starts its operation.
  • FIGS. 9-11 there can be an arrangement to inhibit the movement of the shut-off slide 38 until the retainer slide 42 is in its position for engagement with the shut-off slide 38.
  • FIGS. 9-11 Such a modification is shown in FIGS. 9-11.
  • air is admitted through an axial groove 66 in the slide to a transverse bore 67 that forms a restriction and ends in a wider coaxial bore 68.
  • Another bore 69 leads axially from this bore to the end chamber 40.
  • the bore 68 registers with a vent passage 70 when the shut-off slide 38 is in its open end-position (its left hand position shown in FIG. 9).
  • the retainer slide 42 is arranged to control the vent passage 70, and, unless it is in its position for engagement with the shut-off slide 38, it holds the vent passage open as can be seen in FIG. 9.
  • the vent passage 70 vents through a sintered bronze plate 71.
  • the retainer slide 42 is in its position of FIG. 11 and blocks the vent passage 70.
  • the shut-off slide 38 is in its open end position its left hand position in which it is shown in FIG. 9. Since the vent passage 70 is blocked by the slide 42, the end chamber 40 is being pressurized through the passages 66,67,68,69 and the air pressure forces the shutoff slide 38 to abut against the slide 42 as shown in FIG. 11. In this intermediate position of the shut-off slide, the vent passage 70 is isolated from the air chamber 40 since the bore 68 does not any longer register with the vent passage 70. Thus, the shut-off slide 38 is forced into its closed position its right hand position when the retainer slide 42 is withdrawn by the arm 48 as previously described.
  • the air chamber 40 is not only vented, but it has partial vacuum since the restricted bore 67 forms an injection nozzle that draws air from the air chamber 40.
  • a weak wire spring 72 is preferably inserted to force the arm against the ball 56 and ensure that the ball always contacts both its races 55 and 57. Furthermore, this spring 72 permits a play at 73.
  • the spring 39 ensures that the shut-off slide remains open during the reverse running during which the supply passage 31 is utilized as an exhaust passage as previously described.
  • the operator can adjust the final torque by turning the axle 50 on the eccentric pin 49 of which the arm 48 is journal-mounted.
  • the operator needs greater changes in the final torque, he switches from the torsion bar 17 to a bar with other spring characteristics, or he uses an adjustable torsion bar.
  • An impact wrench comprising an anvil connected to a spindle, a hammer adapted to deliver rotary impacts to the anvil, a fluid motor for rotating the hammer, a motive fluid passage for the motor, a shut-off valve in said motive fluid passage, a member connected to the hammer to rotate conjointly therewith and forming a circular inner race for a rolling member, and a pivotably mounted arm carrying an outer race for said rolling member, said arm being swingable into a position for initiating the shut-off valve to take up a closed position, said outer race diverging relative to said inner race in the direction of the rotary impacts so that, at its rolling movement created by the rebound motion of the hammer, said rolling member forces said arm to swing into its position for initiating said shut-off valve to take up said closed position when the rebound of the hammer from the anvil reaches a pre-determined magnitude.
  • An impact wrench as defined in claim 2 comprising a spring adapted to load the shut-off valve towards said closed position so as to re-set the valve when the drive air is closed off.
  • shut-off valve is a slide which is parallel with the pneumatic motor and the trigger is a slide which is transverse to the shut-off slide and loaded by a spring to register with the shut-off slide.
  • An impact wrench as defined in claim 2 in which the motor is reversible and has an alternative supply passage, and including a selector valve connected upstream of the shut-off valve so as to selectively connect either of the supply passages as an outlet.
  • An impact wrench as defined in claim 6 comprising a piston means connected to either of the supply passages, and a retainer means controlled by said piston means to retain the rolling member when the selector valve is connected for reverse running.
  • An impact wrench as defined in claim 6 comprising a retainer loaded by a spring to bias said rolling member into an inactive position, and a piston means connected to a mouth into the supply passage that includes the shut-off valve, said mouth being located between said selector valve and the shut-off valve, said piston means being adapted to release said retainer from said rolling member when loaded by pressure fluid.
  • An impact wrench as defined in claim 1 comprising a retainer loaded by a spring to bias said rolling member into an inactive position and a piston means adapted to release the retainer from the rolling member when the wrench is started.
  • shut-off valve is a slide arranged in the supply passage of the motor, said shut-off slide being loaded by a spring towards an open end position and having a piston surface in an air chamber in order to be forced towards a closed position by air pressure in said air chamber, a restricted air passage leads from said supply passage to said air chamber, a vent passage is arranged for venting said air chamber whereby to inhibit a movement of said shut-off slide away from its open end position, said shut-off slide isolating said air chamber from said vent passage when out of said open end position, and a trigger is loaded towards a position for retaining said shut-off slide in an intermediate open position when the shut-off slide is forced towards its closed position by the air pressure in said air chamber, said arm being adapted to move said trigger into a position in which it releases the shut-off slide for movement to said closed position, said trigger holding said vent passage closed when in its position for retaining said shut-off slide.
  • An impact wrench comprising an anvil connected to a spindle, a hammer adapted to deliver rotary impacts to the anvil, a fluid motor for rotating the hammer and having a supply passage, a shut-off valve in the form of a shut-off slide arranged in the supply passage of the motor, said shut-off slide being loaded by a spring towards an open end position and having a piston surface in an air chamber in order to be forced towards a closed position by air pressure in said air chamber, a restricted air passage leading from said supply passage to said air chamber, a vent passage for venting said air chamber whereby to inhibit a movement of said shut-off slide away from its open end position, said shut-off slide isolating said air chamber from said vent passage when out of said open end position, a trigger loaded towards a position for retaining said shut-off slide is an intermediate open position when the shut-off slide is forced towards its closed position by the air pressure in said air chamber, said trigger holding said vent passage closed when in its position for retaining said shut-off slide, and means for
  • An impact wrench as defined in claim 14 in which said trigger is a slide arranged transverse of said shutoff slide and loaded by a spring towards said position for retaining the shut-off slide.
  • said restricted passage comprises an ejector nozzle in said shut-off slide and a suction passage from said air chamber to said nozzle, said nozzle being located to be directed into said vent passage when said shut-off slide is in said open end position, whereby to provide for a suction in said air chamber.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Pivots And Pivotal Connections (AREA)
US00328679A 1972-02-04 1973-02-01 Impact wrench with automatic shut-off Expired - Lifetime US3835934A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7201300A SE374505B (ru) 1972-02-04 1972-02-04

Publications (1)

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US3835934A true US3835934A (en) 1974-09-17

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ID=20257958

Family Applications (2)

Application Number Title Priority Date Filing Date
US00328679A Expired - Lifetime US3835934A (en) 1972-02-04 1973-02-01 Impact wrench with automatic shut-off
US404589A Expired - Lifetime US3904298A (en) 1972-02-04 1973-10-09 Friction joint

Family Applications After (1)

Application Number Title Priority Date Filing Date
US404589A Expired - Lifetime US3904298A (en) 1972-02-04 1973-10-09 Friction joint

Country Status (15)

Country Link
US (2) US3835934A (ru)
JP (1) JPS5623754B2 (ru)
AU (1) AU464994B2 (ru)
BE (1) BE794782A (ru)
BR (1) BR7300833D0 (ru)
CA (1) CA997179A (ru)
CH (1) CH553625A (ru)
DE (1) DE2304610C2 (ru)
FR (1) FR2169974B1 (ru)
GB (1) GB1391574A (ru)
IT (1) IT977178B (ru)
NL (1) NL177091C (ru)
PL (1) PL84774B1 (ru)
SE (1) SE374505B (ru)
ZA (1) ZA73663B (ru)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4185701A (en) * 1975-05-19 1980-01-29 Sps Technologies, Inc. Tightening apparatus
FR2446698A1 (fr) * 1979-01-17 1980-08-14 Dresser Ind Appareil d'arret perfectionne pour outils a commande pneumatique
USH1821H (en) * 1997-07-02 1999-12-07 Caterpillar, Incorporated Method and apparatus for operating a driver and an associated number of work tools
US6158526A (en) * 1999-03-09 2000-12-12 Snap-On Tools Company Reversible impact mechanism with structure limiting hammer travel
US6223834B1 (en) * 1998-05-25 2001-05-01 Ryobi Limited Impact structure for impact power tool
US6234256B1 (en) * 1995-10-31 2001-05-22 Cooper Power Tools Gmbh & Co. Power screw driver with damping device between covered grip and housing
US20030121680A1 (en) * 2000-01-27 2003-07-03 Osamu Izumisawa Pneumatic rotary tools
US20060266537A1 (en) * 2005-05-27 2006-11-30 Osamu Izumisawa Rotary impact tool having a ski-jump clutch mechanism
US20090016918A1 (en) * 2005-06-09 2009-01-15 Atlas Copco Tools Ab Pneumatic vane motor with by- pass means
US9289886B2 (en) 2010-11-04 2016-03-22 Milwaukee Electric Tool Corporation Impact tool with adjustable clutch
US20160354905A1 (en) * 2015-06-05 2016-12-08 Ingersoll-Rand Company Power tools with user-selectable operational modes
US11213934B2 (en) * 2018-07-18 2022-01-04 Milwaukee Electric Tool Corporation Impulse driver
US11260517B2 (en) 2015-06-05 2022-03-01 Ingersoll-Rand Industrial U.S., Inc. Power tool housings
US11602832B2 (en) 2015-06-05 2023-03-14 Ingersoll-Rand Industrial U.S., Inc. Impact tools with ring gear alignment features
US11724368B2 (en) 2020-09-28 2023-08-15 Milwaukee Electric Tool Corporation Impulse driver
US11784538B2 (en) 2015-06-05 2023-10-10 Ingersoll-Rand Industrial U.S., Inc. Power tool user interfaces

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6237647Y2 (ru) * 1981-05-29 1987-09-25
JPS58144082U (ja) * 1982-03-25 1983-09-28 ヤンマーディーゼル株式会社 内燃機関の燃料供給ポンプ
US4822958A (en) * 1982-09-30 1989-04-18 Laere Christiaan G M Electric rotary power tool apparatus holdable by hand during operation, kit comprising the same; and novel switch means therefor
US4773503A (en) * 1987-09-11 1988-09-27 Robert L. Pease Ladder hinge
US4934485A (en) * 1988-02-08 1990-06-19 Robert Pease Combination ladder and hand truck
US6837468B1 (en) * 2003-05-29 2005-01-04 Progeny, Inc. Friction control for articulating arm joint
DE102010053677B4 (de) * 2010-12-07 2012-08-02 Storm Pneumatic Tool Co., Ltd. Druckluft-Schlagschrauber
SE539483C2 (en) 2016-02-23 2017-10-03 Fumex Ab Lockable friction joint

Citations (2)

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US2543979A (en) * 1946-01-31 1951-03-06 Chicago Pneumatic Tool Co Impact wrench torque control
US2768546A (en) * 1954-04-26 1956-10-30 Chicago Pneumatic Tool Co Torque control for impact wrenches

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US367723A (en) * 1887-08-02 Haeey f
US253753A (en) * 1882-02-14 Lifting-jack
US257306A (en) * 1882-05-02 Michael farley
US1140167A (en) * 1914-04-24 1915-05-18 Henry M Kolb Ratchet-wrench.
US1680515A (en) * 1926-12-21 1928-08-14 Buda Co Ratchet mechanism for lifting jacks
US2214901A (en) * 1937-06-26 1940-09-17 Int Projector Corp Power drive clutch
DE853280C (de) * 1946-01-31 1952-10-23 Chicago Pneumatic Tool Co Durch Motor angetriebener Schlagschraubenschluessel mit einem zum Fassen der Schraube od. dgl. dienenden Werkzeugkopf und mit einer Schlagkupplung
CH300382A (fr) * 1952-07-25 1954-10-01 Rolex Montres Dispositif d'accouplement à roue libre, notamment pour l'horlogerie.
US2940283A (en) * 1955-08-29 1960-06-14 Case Co J I Slip clutch
SE350426B (ru) * 1970-04-24 1972-10-30 Atlas Copco Ab
JPS5115636A (ja) * 1974-07-26 1976-02-07 Yamamoto Agricult Chem Jikoseisatsuchusoseibutsu

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2543979A (en) * 1946-01-31 1951-03-06 Chicago Pneumatic Tool Co Impact wrench torque control
US2768546A (en) * 1954-04-26 1956-10-30 Chicago Pneumatic Tool Co Torque control for impact wrenches

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4185701A (en) * 1975-05-19 1980-01-29 Sps Technologies, Inc. Tightening apparatus
FR2446698A1 (fr) * 1979-01-17 1980-08-14 Dresser Ind Appareil d'arret perfectionne pour outils a commande pneumatique
US6234256B1 (en) * 1995-10-31 2001-05-22 Cooper Power Tools Gmbh & Co. Power screw driver with damping device between covered grip and housing
USH1821H (en) * 1997-07-02 1999-12-07 Caterpillar, Incorporated Method and apparatus for operating a driver and an associated number of work tools
US6223834B1 (en) * 1998-05-25 2001-05-01 Ryobi Limited Impact structure for impact power tool
US6158526A (en) * 1999-03-09 2000-12-12 Snap-On Tools Company Reversible impact mechanism with structure limiting hammer travel
US6227308B1 (en) 1999-03-09 2001-05-08 Snap-On Tools Company Reversible impact mechanism with structure limiting hammer travel
US7404450B2 (en) * 2000-01-27 2008-07-29 S.P. Air Kabusiki Kaisha Pneumatic rotary tool
US20070151075A1 (en) * 2000-01-27 2007-07-05 Sp Air Kabushiki Kaisha Pneumatic rotary tool
US20030121680A1 (en) * 2000-01-27 2003-07-03 Osamu Izumisawa Pneumatic rotary tools
US20060266537A1 (en) * 2005-05-27 2006-11-30 Osamu Izumisawa Rotary impact tool having a ski-jump clutch mechanism
US20090016918A1 (en) * 2005-06-09 2009-01-15 Atlas Copco Tools Ab Pneumatic vane motor with by- pass means
US7811070B2 (en) * 2005-06-09 2010-10-12 Atlas Copco Tools Ab Pneumatic vane motor with by-pass means
US9289886B2 (en) 2010-11-04 2016-03-22 Milwaukee Electric Tool Corporation Impact tool with adjustable clutch
US20160354905A1 (en) * 2015-06-05 2016-12-08 Ingersoll-Rand Company Power tools with user-selectable operational modes
US11260517B2 (en) 2015-06-05 2022-03-01 Ingersoll-Rand Industrial U.S., Inc. Power tool housings
US11491616B2 (en) * 2015-06-05 2022-11-08 Ingersoll-Rand Industrial U.S., Inc. Power tools with user-selectable operational modes
US11602832B2 (en) 2015-06-05 2023-03-14 Ingersoll-Rand Industrial U.S., Inc. Impact tools with ring gear alignment features
US11707831B2 (en) 2015-06-05 2023-07-25 Ingersoll-Rand Industrial U.S., Inc. Power tool housings
US11784538B2 (en) 2015-06-05 2023-10-10 Ingersoll-Rand Industrial U.S., Inc. Power tool user interfaces
US11213934B2 (en) * 2018-07-18 2022-01-04 Milwaukee Electric Tool Corporation Impulse driver
US11890726B2 (en) 2018-07-18 2024-02-06 Milwaukee Electric Tool Corporation Impulse driver
US11724368B2 (en) 2020-09-28 2023-08-15 Milwaukee Electric Tool Corporation Impulse driver

Also Published As

Publication number Publication date
JPS5623754B2 (ru) 1981-06-02
AU5177873A (en) 1974-08-08
NL177091C (nl) 1985-08-01
FR2169974A1 (ru) 1973-09-14
IT977178B (it) 1974-09-10
NL177091B (nl) 1985-03-01
NL7301377A (ru) 1973-08-07
BE794782A (fr) 1973-05-16
ZA73663B (en) 1973-10-31
PL84774B1 (ru) 1976-04-30
CH553625A (de) 1974-09-13
CA997179A (en) 1976-09-21
DE2304610A1 (de) 1973-08-09
AU464994B2 (en) 1975-09-11
BR7300833D0 (pt) 1973-09-25
US3904298A (en) 1975-09-09
DE2304610C2 (de) 1982-12-30
FR2169974B1 (ru) 1976-05-14
JPS4888600A (ru) 1973-11-20
GB1391574A (en) 1975-04-23
SE374505B (ru) 1975-03-10

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