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Class Information
Number: 81/57
Name: Tools > Wrench, screwdriver, or driver therefor > Machine > Gear-operated
Description: The wrench or screwdriver is operated by gearing.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7530294 |
Powered adjustable pipe wrench |
May. 12, 2009 |
| 7430849 |
Conveyor chain pin remover |
Oct. 7, 2008 |
| 7418890 |
Wrench with split ring |
Sep. 2, 2008 |
| 7331259 |
Ratchet wrench |
Feb. 19, 2008 |
| 7237621 |
Driving device |
Jul. 3, 2007 |
| 7225707 |
Torque wrench with quick-release gear set |
Jun. 5, 2007 |
| 7171873 |
Tensionless power ratchet wrench assembly |
Feb. 6, 2007 |
| 7114824 |
Multi-functional tool with interchangeable adjustable wrench head unit |
Oct. 3, 2006 |
| 7111528 |
Multipurpose grasping part holder |
Sep. 26, 2006 |
| 7100476 |
Torque wrench for dental implants |
Sep. 5, 2006 |
| 7080578 |
Hand tool with impact drive and speed reducing mechanism |
Jul. 25, 2006 |
| 7059217 |
Tensionless power ratchet wrench assembly |
Jun. 13, 2006 |
| 7013759 |
Apparatus for handling tubulars and method |
Mar. 21, 2006 |
| 6923095 |
Tensionless power ratchet wrench assembly |
Aug. 2, 2005 |
| 6786114 |
Gripwheel driver and method of attachment to obtain unique properties |
Sep. 7, 2004 |
| 6776068 |
Valve operator |
Aug. 17, 2004 |
| 6722232 |
Manually-powered drive device and assembly |
Apr. 20, 2004 |
| 6681659 |
Automatic fastener apparatus and method |
Jan. 27, 2004 |
| 6536311 |
Mechanical hand tool called the swing arm |
Mar. 25, 2003 |
| 6318199 |
Load equalizing power tong gear train |
Nov. 20, 2001 |
| 6253644 |
Torque wrench |
Jul. 3, 2001 |
| 6223925 |
Stud tensioning device for flange cover |
May. 1, 2001 |
| 6125721 |
Torque transmitting device for power tool |
Oct. 3, 2000 |
| 5953965 |
Device for tightening bolt and nut |
Sep. 21, 1999 |
| 5881609 |
Reversing-input bidirectional-output longitudinally-slideable-shaft |
Mar. 16, 1999 |
| 5427002 |
Power drive unit for hand tools |
Jun. 27, 1995 |
| 5231901 |
Ratchet tool |
Aug. 3, 1993 |
| 5142952 |
Ratchet tool |
Sep. 1, 1992 |
| 5129290 |
Tool to aid in loosening and/or tightening threaded fastners, particularly in vehicle wheels |
Jul. 14, 1992 |
| 5070749 |
Tool for use in loosening or tightening vehicle wheel fasteners |
Dec. 10, 1991 |
| 5044233 |
Depth adjuster for rotary tools such as screwdrivers |
Sep. 3, 1991 |
| 4756215 |
Torque multiplier wrench |
Jul. 12, 1988 |
| 3979965 |
Torque multiplier tool |
Sep. 14, 1976 |
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