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Class Information
Number: 81/57.39
Name: Tools > Wrench, screwdriver, or driver therefor > Machine > Step by step
Description: Wrench or screwdriver comprising a clutching element so arranged that the movement of the wrench handle in one direction will drive the work engaging means while movement in the opposite direction permits relative movement between the handle and work engaging means.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7392726 |
Ratchet wrench and method of assembling the same |
Jul. 1, 2008 |
| 7306050 |
Toothed ring connecting structure of a power tool |
Dec. 11, 2007 |
| 7261018 |
Power tool |
Aug. 28, 2007 |
| 7171873 |
Tensionless power ratchet wrench assembly |
Feb. 6, 2007 |
| 7168341 |
Torque wrench |
Jan. 30, 2007 |
| 7146880 |
Torque wrench system |
Dec. 12, 2006 |
| 7137318 |
Ratchet-based, torqued-enhanced fastener tool |
Nov. 21, 2006 |
| 7121167 |
Flat head reversible power ratchets |
Oct. 17, 2006 |
| 7117764 |
Screwed device tightening/untightening tool |
Oct. 10, 2006 |
| 7086311 |
Pneumatic ratchet wrench |
Aug. 8, 2006 |
| 7082858 |
Hydraulic torque wrench system |
Aug. 1, 2006 |
| 7080578 |
Hand tool with impact drive and speed reducing mechanism |
Jul. 25, 2006 |
| 7069819 |
Air motor socket wrench with quick socket release and muffler |
Jul. 4, 2006 |
| 7062992 |
Constant rotation rotary torque multiplier |
Jun. 20, 2006 |
| 7062993 |
Torque wrench |
Jun. 20, 2006 |
| 7059217 |
Tensionless power ratchet wrench assembly |
Jun. 13, 2006 |
| 7021179 |
Pressure-operated power screwdriver having a measuring section |
Apr. 4, 2006 |
| 6997083 |
Motorized conduit linking device and method |
Feb. 14, 2006 |
| 6993997 |
Ratchet wrench |
Feb. 7, 2006 |
| 6966239 |
Driving shaft for a ratchet spanner |
Nov. 22, 2005 |
| 6931965 |
Portable pipe tong and method of use |
Aug. 23, 2005 |
| 6925911 |
Fluid-operated power tool |
Aug. 9, 2005 |
| 6923095 |
Tensionless power ratchet wrench assembly |
Aug. 2, 2005 |
| 6912933 |
Hydraulic torque wrench system |
Jul. 5, 2005 |
| 6883401 |
Power tool for fastening objects |
Apr. 26, 2005 |
| 6871569 |
Tool having rotatable driving head |
Mar. 29, 2005 |
| 6860174 |
Hand-held power tool |
Mar. 1, 2005 |
| 6851335 |
Tong with composite belt and methods for making and using same |
Feb. 8, 2005 |
| 6810773 |
Open end ratchet wrench |
Nov. 2, 2004 |
| 6802235 |
Fluid-operated torque wrench |
Oct. 12, 2004 |
| 6789448 |
Power ratchet wrench |
Sep. 14, 2004 |
| 6752045 |
Adjustable wrench |
Jun. 22, 2004 |
| 6742418 |
Torque wrench |
Jun. 1, 2004 |
| 6722232 |
Manually-powered drive device and assembly |
Apr. 20, 2004 |
| 6715381 |
Adjustable reaction arm for torque power tool, and torque power tool provided therewith |
Apr. 6, 2004 |
| 6640669 |
Ratchet wrench |
Nov. 4, 2003 |
| 6598502 |
Multi-swivel connector for a fluid operated tool |
Jul. 29, 2003 |
| 6553873 |
Hydraulic wrench control valve systems |
Apr. 29, 2003 |
| 6532845 |
Method of and an apparatus for tightening threaded connectors |
Mar. 18, 2003 |
| 6490953 |
Externally captured ratchet head and housing assembly |
Dec. 10, 2002 |
| 6490952 |
Fastening device |
Dec. 10, 2002 |
| 6481105 |
Pipe cutter |
Nov. 19, 2002 |
| 6435060 |
Ratchet wrench |
Aug. 20, 2002 |
| 6427559 |
Universal power tool |
Aug. 6, 2002 |
| 6408720 |
Offset hydraulic runner apparatus |
Jun. 25, 2002 |
| 6382059 |
Torque wrench system |
May. 7, 2002 |
| 6370987 |
Apparatus and method for precisely controlling angular displacement of a socket |
Apr. 16, 2002 |
| 6367354 |
Dual analog and ratchet wrench |
Apr. 9, 2002 |
| 6343530 |
Fast adjustable wrench |
Feb. 5, 2002 |
| 6330842 |
Compact head power driven ratchet tool |
Dec. 18, 2001 |
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