US2764048A - Ratchet wrench - Google Patents

Ratchet wrench Download PDF

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Publication number
US2764048A
US2764048A US48650955A US2764048A US 2764048 A US2764048 A US 2764048A US 48650955 A US48650955 A US 48650955A US 2764048 A US2764048 A US 2764048A
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Prior art keywords
wrench
end
recess
member
disposed
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Leslie V Thompson
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Leslie V Thompson
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B13/00Spanners; Wrenches
    • B25B13/46Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle
    • B25B13/461Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member
    • B25B13/467Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member which are gear-operated
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B13/00Spanners; Wrenches
    • B25B13/46Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle
    • B25B13/461Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member
    • B25B13/462Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member the ratchet parts engaging in a direction radial to the tool operating axis
    • B25B13/465Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle with concentric driving and driven member the ratchet parts engaging in a direction radial to the tool operating axis a pawl engaging an internally toothed ring
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B17/00Hand-driven gear-operated wrenches or screwdrivers

Description

SWL 25 i956 L, V. THOMPSON RATCHET WRENCH Filed Feb. "l', 1955 I N VEN TOR L l/ /'fOMPsa/v ATTORNEYS United States PatentA RATCHET WRENCH Leslie V. Thompson, Fullerton, Calif.

Application February 7, 1955, Serial No. 486,509

l 7 Claims. (Cl. 81-57) This invention relates to hand tools, and more specifically, to a manually or mechanically operated ratchet wrench.

One of the primary objects of this invention is to provide a manually or mechanically driven worm wrench, the handle of which may be adapted to lit all standard impact wrench drives and manual drives.

. A further object of this invention is to provide a worm driven wrench which will accommodate all standard types of wrench shafts and sockets.

Another object of this invention is to provide a worm driven wrench with interchangeable means for effecting different driving ratios.

A still further object of this invention is to provide a wrench of the type described wherein the device is provided with an inset to accommodate the heads of bolts and other similar objects of all sizes and shapes, as, for example, a square inset, live-point, six-point, twelvepoint, or any other wrench device which may be necessary or convenient for any particular or specialized job.

Other and further objects and advantages of the instant invention will become more evident from a consideration of the following specification when read in conjunction with the annexed drawings, wherein:

Figure l is an exploded view of a ratchet wrench `constructed in accordance with the present invention.

Figure 2 is a medial, cross-sectional view of the wrench illustrated in Figure l, partly in elevation.

Figure 3 is a cross-sectional view taken on the vertical plane of line 3--3 of Figure 1, looking in the direction of the arrows.

Figure 4 is an enlarged "fragmentary detail tional view illustrating the" ratchet means.

Figure S'is a partial end elevation of the ratchet wrench;

Figure 6 is a perspective view of the wrench shaft.

Reference numeral 10 designates, in general, a worm driven ratchet wrench constructed in accordance with the teachings of the present invention.

The wrench 10 is seen to comprise a substantially annular housing 12 having an enlarged, substantially hollow, elongated and tubular boss 14 integrally formed therewith and projecting laterally away therefrom. One side of the housing 12 is provided with a circular closure plate 16 which is constructed with a substantially centrally positioned aperture 18 extending transversely therethrough. The closure plate 16 is preferably formed integrally with the housing 12.

The hollow boss 14 is constructed with a pair of opposed, aligned, circular passages 20, 22 disposed at opposite ends thereof. An elongated substantially cylindrical worm gear shaft 24, externally threaded at 26 along an interemdiate portion of its length is rotatably journalled in the passages 20 and 22. One end of the shaft 24 is provided with an integrally formed radially extending ange 28 which terminates in an enlarged head 30 having a tool receiving recess 32 formed therein and extending axially inwardly from the outer end thereof. The flange 28 bears against the adjacent end of the boss Vof the boss 14 to prevent longitudinal movement of shaft therein in the other direction. The clip 36 also functions as means releasably securing the shaft 24 in the boss 14.

An annular worm gear member 38 having externally positioned concave worm threads 40 extending circumferentially thereof is disposed within the housing 12 with a side thereof engaging in juxtaposition the closure plate 16. i A cylindrical element 42 having a pair of reduced ends forming shoulders 44, 46 and an integrally formed substantially centrally positioned square wrench shaft 48 is disposed within the worm wheel 38 with the shoulder 46 engaging within the aperture 18.

The element 42 has a centrally positioned substantially U-shaped radially extending recess 50 formed therein which intersects an axial passage 52. The recess 50 communicates at its outer end with a circumferential cut olf 54 having a pair of arcuately shaped base surfaces 56, 58 constructed on centers so that at the point of their intersection 60 the radial distance between this point and theinner surface of the member 38 is greater than the radial` distance between the inner surface of the member 38 and any other point on either of the base surfaces 56, 58.

An elongated substantially rectangular lever 61 having an ogive projection 62 at one of its ends and its other end bifurcated to provide arms 64, 66 is disposed within the recess 50 with the projection 62 engaging an inverted substantially U-shaped spring elements 58 with the arms of the latter resting on the base 50A of the recess. The lever 61 is slotted at 70 to receive a key 72. As is seen in the drawings, the key 72 is positioned in the passage 52 and comprises a cylindrical shaft 74 having an end portion 76 which is substantially rectangular in transverse cross-section and an enlarged knurled head 78 at its other end. The rectangular portion 76 is received within the slot 70 and has a notch 77 formed therein to receive the lower edge of the slot. t

An elongated cylindrical clutch pin 80 having an vintermediate portion 80A is disposed within the cut out '54 with the reduced portion thereof extending transversely ofthe recess 50 and engaged between the arms 64 and 66.

A side plate 82 having an aperture 84 is mounted on the shoulder `44, and the entire assembly is held in operative position bythe resilient split ring 88 mountedn the circumferential groove 90 formed in the housing 12. '1

ln operation, and withthe lever 61 in the position shown in Figure 2, one end of a wrench handle or driving means (not shown) is inserted in recess 32 and the extension 48.is`then inserted in the socket of the bolt or shaft (not shown) or other device which is to be operated upon. Rotation of the head 30 in the direction of the arrow will cause the member 38 to turn in a counterclockwise direction. This motion is effected by the locking action taken between the annular element and the cylindrical member 42 through the pin 810. However, upon rotation of the head 30 in the opposite direction the annular member 38 escapes past the pin 80 and the locking relation between the annular member and the cylinJ drical member is no longer present.

When the lever 61 is turned to position the pin 80 cen trally of the recess 50 no locking action takes place and the annular member 38 is free to rotate in either direction relative to the cylindrical member 42.

When the lever is moved to the right of center with respect to Figure 2, shaft 48 will be driven in the opposite direction when the head 30 is rotated in a. direction opposite the arrow.

l-In .this Aembodiment of the invention, the gear ratio may be changed as desired and a socket wrench 42' may be substituted for the wrench shaft 42. In this case, the shaft 48 is cylindrical and :has a hexagonal recess 92 formed therein. .In all other respects the two are identical. f

If desired, the wrench may be made as a direct-drive non-ratchet Wrench by omitting the ratchet elements vand making the member 42 integral with the annular member 38.

Having vdescribed and illustrated one embodiment of this invention in detail, it will be understood that the same is offered merely by way of example, and that the invention is to be :limited only bythe scope ofthe appended claims.

What is .claimed is':

1. A ratchet wrench comprising a housing, an annular worm gear disposed in said housing, Vsaid worm gear having exteriorly formed vconvex threads, a worm shaft mounted :in said .housing and meshing with said gear, a cylindrical member having an axial extension of reduced transverse cross-sectional area extending from one end thereof, said cylindrical member having a cut out in the side thereof, and means disposed within said cut out for locking said cylindrical member to turn with the rotation of said annular worm gear in one direction.

2. A ratchet wrench as defined in claim 1, said `means permitting said `annular worm gear to rotate freely about said cylindrical member when said annular worm gear lis turned in the opposite direction.

3. .A ratchet Wrench comprising a substantially hollow cylindrical housing having a susbtantially hollow boss extending from the `side thereof, a worm shaft journalled for rotation within said boss, an annular worm gear having concave worin teeth being disposed Within said housing and meshing with said worm shaft, a .cylindrical member disposed -within said annular worm gear, said cylindrical member having a wrench Lshaft projecting from a end thereof, said wrench shaft having a substantially square cross-sectional configuration, said cylindrical member having a recess formed therein extending transversely thereof, said cylindrical .member having a cut out formed in its side, said cutout extending transversely of said recess and substantially parallel to the longitudinal axis of said cylindrical member, an linverted .substantially U-shaped resilient member disposed within said recess with the arms of said resilient member engaging the base of said recess, said cylindrical member having an axial passage extending Ainwardly from the other end thereof and intersecting said recess, a .lever disposed within said recess, said lever .having an vogive end engaging against said resilient member, said .lever having a bifurcated end oppositely disposed with .respect to said one end, an elongated cylindrical pin having a central 'portion of .reduced diameter, said pin being positioned within said cut out por'tion with the reduced portion thereof engaged on opposite sides by the bifurcations, said lever having an elongated substantially rectangular slot formed therein adjacent said ogive end, a key disposed within said passage, said key having a substantially rectangular end adapted to be received within said slot, and the other end of said key having an enlarged head.

4. A ratchet wrench as defined in claim 3, and said extension having a polygonal socket extending inwardly from the outer end thereof.

5. A ratchet wrench as dened in claim 3, said housing having a closure plate iixedly secured thereto adjacent one of its ends, asecon'd closure plate for the oppositely disposed end, said closure plates being disposed on opposite sides of said annular worm gear, a circumferential groove formed .in .said housing adjacent .sa-id second closure plate, and resilient clip means disposed within said groove to detachably secure'togetherthe elements of said wrench.

6. A ratchet Wrench as dened in claim 3, said cut out out portion having the base thereof arcuately shaped and struck :from a pair of spaced centers, said arcuate base intersecting `on a line .substantially parallel to the longitudinal axis of said cylindrical member at a point intermediate .the ends of .said cut out portion.

A7. A ratchet wrench comprising a substantially hollow cylindrical housing having a worm shaft journalled for rotation therein, a 'worm gear Vdisposed within said housing andmeshing with said wormis'haft, a `cylindrical member disposed withinsaid worm gear, `said cylindrical member having work engaging means integral therewith, said cylindrical .member having va recess :formed therein extending .transversely thereof, said cylindrical member having a cut out formed in its side, said cut out extending transversely -of said recess and .substantially parallel to the longitudinal .axis of lsaid cylindrical member, said cylindrical .mem-ber .having an axial passage extending inwardly from ythe other end thereof and intersecting said recess, a lever disposed within said recess, said lever having 'a bifurcated end, :an elongated .cylindrical pin having a central portion of reduced diameter, said pin being positioned within said out out portion with the reduced portion thereof engaged on opposite sides by the bifurcations, said .lever having Van elongated `substantially rectangular slot formed therein y.adjacent .its other end, a key disposed within vsaid passage, said key having `a substantially rectangular end 'adapted to be .received Within said slot, and thetother tend of said key having .an enlarged head.

References Cited in the fiile of this patent UNITED STATES PATENTS 735,134 McLean Aug. 4, 1903 1,352,354- Church Sept. 7, 1920 1,903,514 Merriman et al Apr. 11, 1933 1,970,721 Walton Aug. 21, 1934 2,578,686 FishV DEC. 1 8, 1951 2,654,281 Rasmussen Oct. 6, 1953 2,680,983 Miller June 15, 1954 2,703,030 Marvin Mar. 1, 1955

US2764048A 1955-02-07 1955-02-07 Ratchet wrench Expired - Lifetime US2764048A (en)

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Cited By (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2933961A (en) * 1957-10-28 1960-04-26 Orville A Adams Power operated pipe wrench
US2949654A (en) * 1957-01-08 1960-08-23 Us Electrical Motors Inc Hoist cable retainer
US3630106A (en) * 1969-11-19 1971-12-28 Oliver D Olinger Socket wrench
US4240310A (en) * 1979-03-28 1980-12-23 Roth Edmund H Socket wrench
US4322989A (en) * 1977-12-27 1982-04-06 Garolis Joseph J Power-operated gear-driven box wrench
US4903554A (en) * 1988-06-02 1990-02-27 Colvin David S Reversible ratchet wrench with thin head construction
US4914987A (en) * 1988-09-20 1990-04-10 Grumman Aerospace Corporation Tube coupling tightening tool
US5178047A (en) * 1991-08-08 1993-01-12 Easco Hand Tools, Inc. Reversible ratchet wrench
US5542322A (en) * 1993-08-27 1996-08-06 J. H. Williams Company Compact folding wrench
US5557991A (en) * 1995-03-24 1996-09-24 Brodbeck; James L. Calibration hand tool
WO1998056539A1 (en) * 1997-06-09 1998-12-17 Hand Tool Design Corporation Ratchet type ring spanner
US5988022A (en) * 1998-07-01 1999-11-23 Wang; Yen-Yu Ratchet wrench
US6148695A (en) * 1999-08-03 2000-11-21 Hu; Bobby Ratchet wheel with asymmetric arcuate concave teeth or non-arcuate concave teeth and ratcheting tools with such ratchet wheel
US6431031B1 (en) 1999-12-16 2002-08-13 Bobby Hu Reversible ratcheting tool with a smaller head
US6450066B1 (en) 2001-10-19 2002-09-17 Bobby Hu Head of a wrench handle
US6453779B2 (en) 2000-07-21 2002-09-24 Bobby Hu Positioning device for a switch member of a reversible ratchet-type wrench
US6457389B1 (en) 2000-08-22 2002-10-01 Bobby Hu Switching arrangement for a reversible ratchet type wrench
US6457387B1 (en) 2000-01-11 2002-10-01 Bobby Hu Reversible ratcheting tool with a smaller head and improved driving torque
US6488136B2 (en) * 2000-06-26 2002-12-03 Chih-Ming Chang Ratchet wheel structure of ratcheting wrench
US6490953B2 (en) 2001-04-12 2002-12-10 Mechanics Custom Tools Corp. Externally captured ratchet head and housing assembly
US6520051B1 (en) 2001-12-27 2003-02-18 Bobby Hu Head of a wrench handle
US6539825B1 (en) 2001-09-20 2003-04-01 Yen-Wen Lin Single direction ratcheting wrench with stuck prevention and ratcheting direction indication
US6568299B2 (en) 1999-12-16 2003-05-27 Bobby Hu Reversible ratcheting tool with a smaller head
US6644148B2 (en) 2002-02-08 2003-11-11 Bobby Hu Reversible ratchet-type wrench
US6647832B2 (en) 2001-07-27 2003-11-18 Bobby Hu Wrench having two rigid supporting areas for a pawl
US6666117B2 (en) 2001-07-13 2003-12-23 Bobby Hu Wrench with a fixed maximum operational torque
US6666112B2 (en) 2000-09-01 2003-12-23 Bobby Hu Switching arrangement for a reversible ratchet type wrench
US6722234B2 (en) 2001-05-14 2004-04-20 Bobby Hu Easy-to-operate and easy-to-assemble ratcheting-type wrench
US6732614B2 (en) 2001-02-19 2004-05-11 Bobby Hu Easy-to-manufacture and easy-to-assemble ratcheting-type wrench
US6745647B2 (en) 2000-11-29 2004-06-08 Mei-Chen Wang Wrench having a universal-joint ratchet wheel
US6758641B2 (en) 2001-07-13 2004-07-06 Bobby Hu Method for manufacturing a ratchet type ring spanner having a larger cavity for receiving a larger pawl
US20040139823A1 (en) * 2000-02-03 2004-07-22 Bobby Hu Biasing arrangement for a pawl of a reversible ratchet-type wrench
US6807882B2 (en) 2001-05-07 2004-10-26 Bobby Hu Wrench with a simplified structure
US6945141B2 (en) 2002-04-22 2005-09-20 Bobby Hu Reversible ratchet type wrench
US6955104B2 (en) 2000-03-13 2005-10-18 Bobby Hu Reversible ratcheting tool with a smaller head
US6971286B2 (en) 2002-07-22 2005-12-06 Bobby Hu Ratcheting wrench with quick tightening/loosening functions and fine adjusting functions
US7017453B2 (en) 2001-10-17 2006-03-28 Bobby Hu Reversible ratchet-type wrench
US20090025516A1 (en) * 2007-07-27 2009-01-29 Vincent Samudosky Powered wrench
US20090229421A1 (en) * 2008-03-12 2009-09-17 Jamie Bass Tool assembly, system and method, for driving threaded members
US20150174741A1 (en) * 2013-12-19 2015-06-25 Joshua W. Frank Adjustable wrenches, pliers, and shears
US9120213B2 (en) 2011-01-21 2015-09-01 Milwaukee Electric Tool Corporation Powered ratchet wrench

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US735134A (en) * 1903-02-04 1903-08-04 Andrew R Mclean Ratchet-wrench.
US1352354A (en) * 1919-12-17 1920-09-07 Lottie Sanford Ratchet and clutch mechanism
US1903514A (en) * 1932-04-11 1933-04-11 Henry H Merriman Wrench
US1970721A (en) * 1933-01-20 1934-08-21 Walton Allen Ratchet wrench
US2578686A (en) * 1945-04-27 1951-12-18 Tubing Appliance Co Inc Open-sided-socket ratchet wrench
US2654281A (en) * 1950-07-07 1953-10-06 Svend A Rasmussen Ratchet wrench for use with turnbuckles
US2680983A (en) * 1953-06-23 1954-06-15 Jerry T Miller Geared ratchet wrench
US2703030A (en) * 1951-02-13 1955-03-01 Stead Rail Anchor Company Ltd Gear operated ratchet wrench

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US735134A (en) * 1903-02-04 1903-08-04 Andrew R Mclean Ratchet-wrench.
US1352354A (en) * 1919-12-17 1920-09-07 Lottie Sanford Ratchet and clutch mechanism
US1903514A (en) * 1932-04-11 1933-04-11 Henry H Merriman Wrench
US1970721A (en) * 1933-01-20 1934-08-21 Walton Allen Ratchet wrench
US2578686A (en) * 1945-04-27 1951-12-18 Tubing Appliance Co Inc Open-sided-socket ratchet wrench
US2654281A (en) * 1950-07-07 1953-10-06 Svend A Rasmussen Ratchet wrench for use with turnbuckles
US2703030A (en) * 1951-02-13 1955-03-01 Stead Rail Anchor Company Ltd Gear operated ratchet wrench
US2680983A (en) * 1953-06-23 1954-06-15 Jerry T Miller Geared ratchet wrench

Cited By (48)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2949654A (en) * 1957-01-08 1960-08-23 Us Electrical Motors Inc Hoist cable retainer
US2933961A (en) * 1957-10-28 1960-04-26 Orville A Adams Power operated pipe wrench
US3630106A (en) * 1969-11-19 1971-12-28 Oliver D Olinger Socket wrench
US4322989A (en) * 1977-12-27 1982-04-06 Garolis Joseph J Power-operated gear-driven box wrench
US4240310A (en) * 1979-03-28 1980-12-23 Roth Edmund H Socket wrench
US4903554A (en) * 1988-06-02 1990-02-27 Colvin David S Reversible ratchet wrench with thin head construction
US4914987A (en) * 1988-09-20 1990-04-10 Grumman Aerospace Corporation Tube coupling tightening tool
US5178047A (en) * 1991-08-08 1993-01-12 Easco Hand Tools, Inc. Reversible ratchet wrench
US5542322A (en) * 1993-08-27 1996-08-06 J. H. Williams Company Compact folding wrench
US5557991A (en) * 1995-03-24 1996-09-24 Brodbeck; James L. Calibration hand tool
WO1998056539A1 (en) * 1997-06-09 1998-12-17 Hand Tool Design Corporation Ratchet type ring spanner
US5988022A (en) * 1998-07-01 1999-11-23 Wang; Yen-Yu Ratchet wrench
US6148695A (en) * 1999-08-03 2000-11-21 Hu; Bobby Ratchet wheel with asymmetric arcuate concave teeth or non-arcuate concave teeth and ratcheting tools with such ratchet wheel
US6301998B1 (en) * 1999-08-03 2001-10-16 Bobby Hu Ratchet wheel with asymmetric arcuate concave teeth or non-arcuate concave teeth and socket wrench with such ratchet wheel
USRE43286E1 (en) 1999-08-03 2012-04-03 Bobby Hu Ratchet wheel with asymmetric arcuate concave teeth or non-arcuate concave teeth ratcheting tools with such ratchet wheel and combination of such ratchet wheel and a pawl
US6431031B1 (en) 1999-12-16 2002-08-13 Bobby Hu Reversible ratcheting tool with a smaller head
US6568299B2 (en) 1999-12-16 2003-05-27 Bobby Hu Reversible ratcheting tool with a smaller head
US7234372B2 (en) 2000-01-11 2007-06-26 Bobby Hu Reversible ratcheting tool with a smaller head and improved driving torque
US6457387B1 (en) 2000-01-11 2002-10-01 Bobby Hu Reversible ratcheting tool with a smaller head and improved driving torque
US20040055423A1 (en) * 2000-01-11 2004-03-25 Bobby Hu Reversible ratcheting tool with a smaller head and improved driving torque
US7237460B2 (en) 2000-02-03 2007-07-03 Bobby Hu Biasing arrangement for a pawl of a reversible ratchet-type wrench
US20040139823A1 (en) * 2000-02-03 2004-07-22 Bobby Hu Biasing arrangement for a pawl of a reversible ratchet-type wrench
US6955104B2 (en) 2000-03-13 2005-10-18 Bobby Hu Reversible ratcheting tool with a smaller head
US6488136B2 (en) * 2000-06-26 2002-12-03 Chih-Ming Chang Ratchet wheel structure of ratcheting wrench
US6453779B2 (en) 2000-07-21 2002-09-24 Bobby Hu Positioning device for a switch member of a reversible ratchet-type wrench
US6457389B1 (en) 2000-08-22 2002-10-01 Bobby Hu Switching arrangement for a reversible ratchet type wrench
US6666112B2 (en) 2000-09-01 2003-12-23 Bobby Hu Switching arrangement for a reversible ratchet type wrench
US6745647B2 (en) 2000-11-29 2004-06-08 Mei-Chen Wang Wrench having a universal-joint ratchet wheel
US6732614B2 (en) 2001-02-19 2004-05-11 Bobby Hu Easy-to-manufacture and easy-to-assemble ratcheting-type wrench
US6490953B2 (en) 2001-04-12 2002-12-10 Mechanics Custom Tools Corp. Externally captured ratchet head and housing assembly
US6807882B2 (en) 2001-05-07 2004-10-26 Bobby Hu Wrench with a simplified structure
US6722234B2 (en) 2001-05-14 2004-04-20 Bobby Hu Easy-to-operate and easy-to-assemble ratcheting-type wrench
US6666117B2 (en) 2001-07-13 2003-12-23 Bobby Hu Wrench with a fixed maximum operational torque
US6758641B2 (en) 2001-07-13 2004-07-06 Bobby Hu Method for manufacturing a ratchet type ring spanner having a larger cavity for receiving a larger pawl
US6647832B2 (en) 2001-07-27 2003-11-18 Bobby Hu Wrench having two rigid supporting areas for a pawl
US6539825B1 (en) 2001-09-20 2003-04-01 Yen-Wen Lin Single direction ratcheting wrench with stuck prevention and ratcheting direction indication
US7017453B2 (en) 2001-10-17 2006-03-28 Bobby Hu Reversible ratchet-type wrench
US6450066B1 (en) 2001-10-19 2002-09-17 Bobby Hu Head of a wrench handle
US6520051B1 (en) 2001-12-27 2003-02-18 Bobby Hu Head of a wrench handle
US6644148B2 (en) 2002-02-08 2003-11-11 Bobby Hu Reversible ratchet-type wrench
US6945141B2 (en) 2002-04-22 2005-09-20 Bobby Hu Reversible ratchet type wrench
US6971286B2 (en) 2002-07-22 2005-12-06 Bobby Hu Ratcheting wrench with quick tightening/loosening functions and fine adjusting functions
US7032478B2 (en) 2002-07-22 2006-04-25 Bobby Hu Ratcheting wrench with quick tightening/loosening functions and fine adjusting functions
US20090025516A1 (en) * 2007-07-27 2009-01-29 Vincent Samudosky Powered wrench
US7703356B2 (en) 2008-03-12 2010-04-27 Jamie Bass Tool assembly, system and method, for driving threaded members
US20090229421A1 (en) * 2008-03-12 2009-09-17 Jamie Bass Tool assembly, system and method, for driving threaded members
US9120213B2 (en) 2011-01-21 2015-09-01 Milwaukee Electric Tool Corporation Powered ratchet wrench
US20150174741A1 (en) * 2013-12-19 2015-06-25 Joshua W. Frank Adjustable wrenches, pliers, and shears

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