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Class Information
Number: 81/478
Name: Tools > Wrench, screwdriver, or driver therefor > Responsive to torque on work > Work engaging portion pivotally or rotatably connected to handle
Description: Wrench or screwdriver in which the work-engaging portion is pivotally or rotatably connected to a hand-powered structural member which transmits force to it, the portion pivoting or rotating relative to the member when the selected torque is exceeded.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7540220 |
Electronic torque wrench having a trip unit |
Jun. 2, 2009 |
| 7481139 |
Twisting spanner with auto positioning assembly |
Jan. 27, 2009 |
| 7469619 |
Electronic torque wrench with a torque compensation device |
Dec. 30, 2008 |
| 7467576 |
Fixed torque limiting driver |
Dec. 23, 2008 |
| 7430945 |
Ratcheting torque wrench |
Oct. 7, 2008 |
| 7367250 |
Digital beam torque wrench |
May. 6, 2008 |
| 7281457 |
Wrench with adjustable maximum operational torque |
Oct. 16, 2007 |
| 7243581 |
Fixed torque limiting driver |
Jul. 17, 2007 |
| 7222559 |
Screwdriver with torque setting mechanism |
May. 29, 2007 |
| 7185571 |
Omnidirectional twisting tool |
Mar. 6, 2007 |
| 7185570 |
Spanner with enhancing structure for positioning electronic devices installed therein |
Mar. 6, 2007 |
| 7182005 |
Omnidirectional twisting tool |
Feb. 27, 2007 |
| 7182006 |
Torque-controlling wrench |
Feb. 27, 2007 |
| 7174818 |
Click-type torque wrench and improved cam assembly therefor |
Feb. 13, 2007 |
| 7174817 |
Omnidirectional twisting tool |
Feb. 13, 2007 |
| 7168350 |
Omnidirectional twisting tool |
Jan. 30, 2007 |
| 7159494 |
Torque limiting wrench for ultrasonic scaler tip insertion |
Jan. 9, 2007 |
| 7111532 |
Torque wrench |
Sep. 26, 2006 |
| 7069827 |
Torque indication device for hand tools |
Jul. 4, 2006 |
| 7044036 |
Preset torque wrench with multiple setting torque selector mechanism |
May. 16, 2006 |
| 7021179 |
Pressure-operated power screwdriver having a measuring section |
Apr. 4, 2006 |
| 7000508 |
Device for numerically displaying torque of torque wrench having a preset maximum torque |
Feb. 21, 2006 |
| 6978705 |
Torque wrench |
Dec. 27, 2005 |
| 6968759 |
Electronic torque wrench |
Nov. 29, 2005 |
| 6948410 |
Torque wrench with sleeve for locking rotatable handle |
Sep. 27, 2005 |
| 6945144 |
Torque wrench with finite plurality of selectable torque values |
Sep. 20, 2005 |
| 6886434 |
Wrench with a fixed maximum operational torque |
May. 3, 2005 |
| 6807885 |
Torque limiting wrench for an ultrasonic medical device |
Oct. 26, 2004 |
| 6766717 |
Wrench with a fixed maximum operational torque |
Jul. 27, 2004 |
| 6742418 |
Torque wrench |
Jun. 1, 2004 |
| 6722235 |
Torque wrench with a scale |
Apr. 20, 2004 |
| 6666117 |
Wrench with a fixed maximum operational torque |
Dec. 23, 2003 |
| 6662693 |
Wrench with a fixed maximum operational torque |
Dec. 16, 2003 |
| 6575042 |
Beam-type torsion applying and measuring tool |
Jun. 10, 2003 |
| 6334377 |
Adjustable torque wrench having a lock device |
Jan. 1, 2002 |
| 6109150 |
Torque indicating wrench |
Aug. 29, 2000 |
| 6070506 |
Ratchet head electronic torque wrench |
Jun. 6, 2000 |
| 5911801 |
Torque wrench |
Jun. 15, 1999 |
| 5655420 |
Magnetic tightening tool for preventing overtightening and undertightening |
Aug. 12, 1997 |
| 5557994 |
Ratchet handle with torque adjustment |
Sep. 24, 1996 |
| 5546816 |
Lockable spring tightening device |
Aug. 20, 1996 |
| 5503042 |
Antifriction force transmission means for plungers of torque signalling wrenches |
Apr. 2, 1996 |
| 5497682 |
Torsion wrench |
Mar. 12, 1996 |
| 5224403 |
Predetermined torque yielding wrench |
Jul. 6, 1993 |
| 5156072 |
Torque wrench |
Oct. 20, 1992 |
| 5152200 |
Torque signalling wrench |
Oct. 6, 1992 |
| 5129293 |
Torque control mechanism for wrenches and the like |
Jul. 14, 1992 |
| 4898068 |
Torque wrench |
Feb. 6, 1990 |
| 4827813 |
Torque wrench with amplifying gauge |
May. 9, 1989 |
| 4756216 |
Turn-on and turn-off control apparatus for electric screw-drivers |
Jul. 12, 1988 |
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