US3832916A - Impact wrench - Google Patents
Impact wrench Download PDFInfo
- Publication number
- US3832916A US3832916A US00326526A US32652673A US3832916A US 3832916 A US3832916 A US 3832916A US 00326526 A US00326526 A US 00326526A US 32652673 A US32652673 A US 32652673A US 3832916 A US3832916 A US 3832916A
- Authority
- US
- United States
- Prior art keywords
- sleeve
- torsion bar
- wrench according
- torsion
- anvil
- 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
Links
Images
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
- B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
- B25B21/02—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose with means for imparting impact to screwdriver blade or nut socket
-
- 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
- B25B23/0007—Connections or joints between tool parts
- B25B23/0021—Prolongations interposed between handle and tool
Definitions
- the torsion bar is axially fixedly mounted in the sleeve and protrudes from the sleeve only with a drive square.
- the torque is transmitted from the sleeve to the bar through a member which is non-rotatable to but in sliding connection with the sleeve as well as with the bar.
- This design gives relatively large losses in impact energy as compared with a design with a non-adjustable torsion bar.
- FIG. 1 is a longitudinal section through the forward portion of a wrench
- FIG. 2 is a cross section at an enlarged scale taken along lines 2-2 in FIG. 1,
- FIG. 3 is a longitudinal section through the forward portion of another wrench
- FIG. 4 is a cross section at an enlarged scale taken along line 4-4 in FIG. 3.
- the housing of the impact wrench is generally denoted by 11.
- a drive square 12 protrudes from the housing 11 and it is an integral part of an anvil 13 which has radial anvil surfaces 14.
- a rotating hammer 15 has impact dogs 16, and it is rotated by a pneumatic sliding vane motor or any other suitable type of motor. The hammer or a part of the hammer has besides its rotating movement also a simultaneous axial movement so that the impact dogs 16 will repeatedly strike (apply intermittent torque to) the anvil surfaces 14 of the anvil at a rate of for instance 2,000 impacts per minute.
- the drive square 12 is inserted in the rearward end of a sleeve 17 and is axially locked by means of a resiliently mounted pin 18 which protrudes radially from the drive square.
- the sleeve 17 has through interior axial splines 19 which register with corresponding external splines 20 on the torsion bar 21.
- the free end of the torsion bar 21 is formed as a drive square 22 on which a nut socket 23 is attached by means of a resiliently mounted pin 24.
- the bar 21 has a radial hole 25 which canalign with any of four holes 26 in the sleeve 17 since the rodis axially slidable in the sleeve.
- the bar and the sleeve can be axially interlocked by means of a pin 27 as shown in the figures.
- the pin 27 is retained by means of a spring plate 28.
- the pin 27 should have a clearance to the holes 25,26 so that it cannot be subjected to the torque that is transmitted by the spline connection 19,20.
- the torsion unit 17,21 can be divided into three portions, namely: the protruding part of the torsion bar 21, the stiff portion of the spline connection 19,20, and the part of the sleeve 17 which is above the end of the bar 21 and has an elasticity of for instance one tenth of the elasticity of the bar.
- the operator can vary the total spring characteristics of the torsion unit 17,21 within wide limits.
- FIGS. 3 and 4 details which correspond to details in FIGS. 1 and 2 have been given the same reference numerals as in the latter figures.
- the anvil 13 ends in this modification with a hexagonal recess 30, and the bar 21 has a corresponding hexagonal cross section.
- the bar is inserted in the hexagonal recess with one end and it is axially retained by a ball 31 which register with an annular recess 32 in the bar.
- the ball 31 is held in place by a spring loaded axially movable retainer sleeve 33.
- the sleeve 17 has also hexagonal interior cross section which registers with the exterior hexagonal form of the bar, and the bar 21 and the sleeve 17 can be moved axially relative to each other and interlocked by means of a pin 27 in the same way as described with reference to FIGS. 1 and 2.
- the lower end of the sleeve 17 is formed as a socket 34 for anut, but, of course, it can instead be formed as a drive square for a nut socket of the type shown in FIG. 1.
- An impact wrench comprising:
- a power rotated hammer adapted to apply rotary impacts to the anvil
- a torsion unit coupled to said anvil for transmitting from said anvil said rotary impacts as intermittent torque to a nut or the like, said torsion unit comprising:
- a wrench according to claim 1 in which said sleeve is affixed to said anvil, and said torsion bar has a free end protruding from said sleeve.
- a wrench according to claim 3 in which the free end of said sleeve is formed as a socket for a nut.
- a wrench according to claim 1 in which said torsion bar has a generally circular cross section and is provided with a number of axial splines, and said sleeve has a number of axial splines which register with said axial splines in said torsion bar to prevent relative rotation of said torsion bar and sleeve.
- said axially interlocking means includes recesses formed in said sleeve and said torsion bar, said recesses being adapted to receive a locking element therein so as to axially interlock said sleeve and said torsion bar.
- a wrench according to claim 6 in which said recesses are radial holes in said sleeve and said torsion bar, and said locking element comprises a locking pin adapted to be radially inserted in said radial holes in said sleeve and said torsion bar.
- a wrench according to claim 1 in which said torsion bar has a recess at the end thereof that is disposed inside said sleeve, and said axially interlocking means includes means for engaging with said recess in said torsion bar to axially lock said torsion bar in said sleeve in selectively variable axial positions therebetween.
- a wrench according to claim 6 in which a clearance is provided between said locking pin and said radial holes.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
- Dowels (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE01047/72A SE360034B (de) | 1972-01-31 | 1972-01-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3832916A true US3832916A (en) | 1974-09-03 |
Family
ID=20257515
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00326526A Expired - Lifetime US3832916A (en) | 1972-01-31 | 1973-01-24 | Impact wrench |
Country Status (15)
Country | Link |
---|---|
US (1) | US3832916A (de) |
JP (1) | JPS4884398A (de) |
AU (1) | AU464792B2 (de) |
BE (1) | BE794484A (de) |
BR (1) | BR7300704D0 (de) |
CA (1) | CA977590A (de) |
CH (1) | CH553626A (de) |
DE (1) | DE2302080A1 (de) |
FR (1) | FR2169939B1 (de) |
GB (1) | GB1394403A (de) |
IT (1) | IT976835B (de) |
NL (1) | NL7300495A (de) |
SE (1) | SE360034B (de) |
SU (1) | SU542455A3 (de) |
ZA (1) | ZA73433B (de) |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4477096A (en) * | 1982-08-02 | 1984-10-16 | Chicago Pneumatic Tool Company | Socket retainer |
US6345560B1 (en) * | 1997-06-02 | 2002-02-12 | Wera-Werk Hermann Werner Gmbh & Co. | Clamping chuck for bits |
US20020150422A1 (en) * | 2001-04-04 | 2002-10-17 | Masahiro Shimada | Method for forming key-engaging part of axial-hole member, and key-engaging part structure |
US6581697B1 (en) * | 2002-01-28 | 2003-06-24 | Chicago Pneumatic Tool Company | Power impact tool torque apparatus |
US20040237730A1 (en) * | 2001-10-03 | 2004-12-02 | Yuji Hirakata | Socket wrench for power tool |
US20050160882A1 (en) * | 2004-01-22 | 2005-07-28 | Crow Wesley L. | Variable length socket |
US7017678B1 (en) * | 2002-09-09 | 2006-03-28 | Agilent Technologies, Inc. | Threaded stud insertion tool |
US7296502B1 (en) * | 2006-08-30 | 2007-11-20 | Chih-Ching Hsieh | Spanner with a bending section |
US20090311061A1 (en) * | 2008-06-06 | 2009-12-17 | Black & Decker Inc. | Impact Resistant Tool Bit and Tool Bit Holder |
US8438956B1 (en) * | 2007-10-24 | 2013-05-14 | Holmed Corporation | Torque indicating driver |
US8641536B2 (en) | 2009-08-12 | 2014-02-04 | Black & Decker Inc. | Tool bit or tool holder for power tool |
US20150336259A1 (en) * | 2014-05-21 | 2015-11-26 | Chad Hartman | Adjustable tool extender |
US9289886B2 (en) | 2010-11-04 | 2016-03-22 | Milwaukee Electric Tool Corporation | Impact tool with adjustable clutch |
US20160263730A1 (en) * | 2012-10-05 | 2016-09-15 | Lowell Corporation | Impact Socket |
US20170239790A1 (en) * | 2016-02-22 | 2017-08-24 | Malco Products, Inc. | Cleanable reversible socket and driver |
US20220324087A1 (en) * | 2021-03-31 | 2022-10-13 | Stanley Black & Decker Mea Fze | Torque wrench |
USD1000236S1 (en) | 2021-01-11 | 2023-10-03 | Diversitech Corporation | Driver for reversible socket |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61117674U (de) * | 1984-12-28 | 1986-07-24 | ||
DE4445813C2 (de) * | 1994-12-21 | 1996-12-05 | Sfs Ind Holding Ag | Vorsatz für eine mit axialer Schlagwirkung arbeitende Maschine |
JP2007301658A (ja) * | 2006-05-10 | 2007-11-22 | Koto Sangyo Kk | 連結用工具、これを用いたインパクトレンチ |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2438633A (en) * | 1944-11-17 | 1948-03-30 | Condor John | Extensible tool shank |
US2654234A (en) * | 1950-04-15 | 1953-10-06 | Niels A Christensen | Coupling |
US2822677A (en) * | 1955-12-27 | 1958-02-11 | Ingersoll Rand Co | Spring holder |
US2893765A (en) * | 1955-08-18 | 1959-07-07 | Chester S Lyon | Extensible torque rod |
US2964981A (en) * | 1959-02-27 | 1960-12-20 | Ford Motor Co | Wrench having an extension handle associated with measuring indicia |
US3129571A (en) * | 1962-01-03 | 1964-04-21 | Ingersoll Rand Co | Impact tool torque limiting control |
US3306639A (en) * | 1964-10-02 | 1967-02-28 | Chester S Lyon | Extensible torque rod |
-
0
- BE BE794484D patent/BE794484A/xx unknown
-
1972
- 1972-01-31 SE SE01047/72A patent/SE360034B/xx unknown
-
1973
- 1973-01-10 JP JP48005323A patent/JPS4884398A/ja active Pending
- 1973-01-11 IT IT47627/73A patent/IT976835B/it active
- 1973-01-12 NL NL7300495A patent/NL7300495A/xx unknown
- 1973-01-17 DE DE2302080A patent/DE2302080A1/de active Pending
- 1973-01-19 FR FR7301878A patent/FR2169939B1/fr not_active Expired
- 1973-01-19 ZA ZA730433A patent/ZA73433B/xx unknown
- 1973-01-22 GB GB312273A patent/GB1394403A/en not_active Expired
- 1973-01-24 AU AU51388/73A patent/AU464792B2/en not_active Expired
- 1973-01-24 US US00326526A patent/US3832916A/en not_active Expired - Lifetime
- 1973-01-25 CA CA162,101A patent/CA977590A/en not_active Expired
- 1973-01-26 CH CH113773A patent/CH553626A/de not_active IP Right Cessation
- 1973-01-30 BR BR73704A patent/BR7300704D0/pt unknown
- 1973-01-30 SU SU1876647A patent/SU542455A3/ru active
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2438633A (en) * | 1944-11-17 | 1948-03-30 | Condor John | Extensible tool shank |
US2654234A (en) * | 1950-04-15 | 1953-10-06 | Niels A Christensen | Coupling |
US2893765A (en) * | 1955-08-18 | 1959-07-07 | Chester S Lyon | Extensible torque rod |
US2822677A (en) * | 1955-12-27 | 1958-02-11 | Ingersoll Rand Co | Spring holder |
US2964981A (en) * | 1959-02-27 | 1960-12-20 | Ford Motor Co | Wrench having an extension handle associated with measuring indicia |
US3129571A (en) * | 1962-01-03 | 1964-04-21 | Ingersoll Rand Co | Impact tool torque limiting control |
US3306639A (en) * | 1964-10-02 | 1967-02-28 | Chester S Lyon | Extensible torque rod |
Cited By (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4477096A (en) * | 1982-08-02 | 1984-10-16 | Chicago Pneumatic Tool Company | Socket retainer |
US6345560B1 (en) * | 1997-06-02 | 2002-02-12 | Wera-Werk Hermann Werner Gmbh & Co. | Clamping chuck for bits |
US20020150422A1 (en) * | 2001-04-04 | 2002-10-17 | Masahiro Shimada | Method for forming key-engaging part of axial-hole member, and key-engaging part structure |
US7237976B2 (en) * | 2001-04-04 | 2007-07-03 | Sumitomo Heavy Industries, Ltd. | Key-engaging part structure |
US20040237730A1 (en) * | 2001-10-03 | 2004-12-02 | Yuji Hirakata | Socket wrench for power tool |
US7077033B2 (en) * | 2001-10-03 | 2006-07-18 | Kyoto Tool Co., Ltd. | Socket wrench for power tool |
EP1469974A4 (de) * | 2002-01-28 | 2008-03-12 | Chicago Pneumatic Tool Co | Drehmomentvorrichtung für kraftangetriebenes werkzeug |
US6581697B1 (en) * | 2002-01-28 | 2003-06-24 | Chicago Pneumatic Tool Company | Power impact tool torque apparatus |
EP1469974A1 (de) * | 2002-01-28 | 2004-10-27 | Chicago Pneumatic Tool Company | Drehmomentvorrichtung für kraftangetriebenes werkzeug |
CN1318184C (zh) * | 2002-01-28 | 2007-05-30 | 芝加哥气动工具公司 | 用于动力冲击工具的扭矩装置 |
US7017678B1 (en) * | 2002-09-09 | 2006-03-28 | Agilent Technologies, Inc. | Threaded stud insertion tool |
US20050160882A1 (en) * | 2004-01-22 | 2005-07-28 | Crow Wesley L. | Variable length socket |
US7296502B1 (en) * | 2006-08-30 | 2007-11-20 | Chih-Ching Hsieh | Spanner with a bending section |
US8438956B1 (en) * | 2007-10-24 | 2013-05-14 | Holmed Corporation | Torque indicating driver |
US20090311061A1 (en) * | 2008-06-06 | 2009-12-17 | Black & Decker Inc. | Impact Resistant Tool Bit and Tool Bit Holder |
US8109183B2 (en) * | 2008-06-06 | 2012-02-07 | Black & Decker Inc. | Impact resistant tool bit and tool bit holder |
US8641536B2 (en) | 2009-08-12 | 2014-02-04 | Black & Decker Inc. | Tool bit or tool holder for power tool |
US9289886B2 (en) | 2010-11-04 | 2016-03-22 | Milwaukee Electric Tool Corporation | Impact tool with adjustable clutch |
US20160263730A1 (en) * | 2012-10-05 | 2016-09-15 | Lowell Corporation | Impact Socket |
US10166657B2 (en) * | 2012-10-05 | 2019-01-01 | Lowell Corporation | Impact socket |
US20150336259A1 (en) * | 2014-05-21 | 2015-11-26 | Chad Hartman | Adjustable tool extender |
US9669537B2 (en) * | 2014-05-21 | 2017-06-06 | Chad Hartman | Adjustable tool extender |
US20170239790A1 (en) * | 2016-02-22 | 2017-08-24 | Malco Products, Inc. | Cleanable reversible socket and driver |
US9981366B2 (en) * | 2016-02-22 | 2018-05-29 | Malco Products, Inc. | Cleanable reversible socket and driver |
USD1000236S1 (en) | 2021-01-11 | 2023-10-03 | Diversitech Corporation | Driver for reversible socket |
US20220324087A1 (en) * | 2021-03-31 | 2022-10-13 | Stanley Black & Decker Mea Fze | Torque wrench |
Also Published As
Publication number | Publication date |
---|---|
GB1394403A (en) | 1975-05-14 |
NL7300495A (de) | 1973-08-02 |
ZA73433B (en) | 1973-10-31 |
DE2302080A1 (de) | 1973-08-16 |
IT976835B (it) | 1974-09-10 |
FR2169939A1 (de) | 1973-09-14 |
FR2169939B1 (de) | 1977-04-22 |
JPS4884398A (de) | 1973-11-09 |
SU542455A3 (ru) | 1977-01-05 |
AU464792B2 (en) | 1975-09-04 |
SE360034B (de) | 1973-09-17 |
CH553626A (de) | 1974-09-13 |
CA977590A (en) | 1975-11-11 |
AU5138873A (en) | 1974-07-25 |
BE794484A (fr) | 1973-05-16 |
BR7300704D0 (pt) | 1973-09-25 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3832916A (en) | Impact wrench | |
US5992538A (en) | Impact tool driver | |
US4272087A (en) | Nonloosening drill chuck | |
US7861797B2 (en) | Hand-held machine tool with slip clutch | |
GB1576795A (en) | Hammer drill | |
US6227308B1 (en) | Reversible impact mechanism with structure limiting hammer travel | |
GB1230539A (de) | ||
US4586859A (en) | Autolocking hammer-drill chuck | |
ES8107080A1 (es) | Perfeccionamientos en las herramientas manuales de percusion | |
US3592087A (en) | Impact wrench drive | |
US3584527A (en) | Tools and attachments therefor | |
US4098354A (en) | Impact driver for electric drill | |
US3606931A (en) | Rotary impact motor | |
US3561543A (en) | Rotary impact wrench mechanism | |
US3943986A (en) | Screw driver bit | |
US6581697B1 (en) | Power impact tool torque apparatus | |
US3392793A (en) | Impact tool torque limiting control | |
WO1999007521A1 (en) | Impact tool driver | |
US3276524A (en) | Drive adapter for torque responsive control | |
JP3761209B2 (ja) | 作孔ハンマ | |
US3414065A (en) | Rotary impact tool | |
GB973333A (en) | Improvements in impact clutches | |
US3166168A (en) | Impact tool torsion bar | |
US2464372A (en) | Torque measuring screw driver | |
US3789934A (en) | Rotary impact motor |