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Class Information
Number: 81/477
Name: Tools > Wrench, screwdriver, or driver therefor > Responsive to torque on work > Work engaging portion attached to and turned by resilient member
Description: Wrench or screwdriver in which the work-engaging portion is attached to a resilient structural member, which either (a) remains rigid and transmits force from the source to the portion when the torque on the work is below the selected value, or (b) bends and prevents or signal the transmittal of excessive force when the torque on the work exceeds the selected value.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7444906 |
Device for identifying clamping tools |
Nov. 4, 2008 |
| 7188556 |
Rotatable hand tool with a torque controller and method |
Mar. 13, 2007 |
| 7107883 |
Screw-driving tool for implant screws |
Sep. 19, 2006 |
| 7093522 |
Torque indicating wrench |
Aug. 22, 2006 |
| 7080582 |
Screwdriver tool |
Jul. 25, 2006 |
| 7055415 |
Screwdriver assembly and method with torque measuring scale |
Jun. 6, 2006 |
| 6640674 |
Screwdriver having a variable torque-limiting in-line drive |
Nov. 4, 2003 |
| 6575042 |
Beam-type torsion applying and measuring tool |
Jun. 10, 2003 |
| 6439086 |
Torque limiting device |
Aug. 27, 2002 |
| 6345560 |
Clamping chuck for bits |
Feb. 12, 2002 |
| 6330846 |
Chuck for bits or the like |
Dec. 18, 2001 |
| 6314846 |
Torque wrench |
Nov. 13, 2001 |
| 6062115 |
Audible signal torque wrench |
May. 16, 2000 |
| 5876158 |
Drive collet assembly for a tap with overdrive protection |
Mar. 2, 1999 |
| 5737983 |
Dynamometric wrench |
Apr. 14, 1998 |
| 5735183 |
Power screwdriver and clutch mechanism used therein |
Apr. 7, 1998 |
| 5704261 |
Torque-transmitting tool |
Jan. 6, 1998 |
| 5535867 |
Torque regulating coupling |
Jul. 16, 1996 |
| 5224403 |
Predetermined torque yielding wrench |
Jul. 6, 1993 |
| 5179617 |
Device for use in connecting optical fibre cables |
Jan. 12, 1993 |
| 5123313 |
Torsion socket |
Jun. 23, 1992 |
| 5057119 |
Apparatus and methods for attaching and detaching an ultrasonic actuated blade/coupler and an acoustical mount therefor |
Oct. 15, 1991 |
| 5048381 |
Torque-indicating screwdriver |
Sep. 17, 1991 |
| 4979408 |
Screw tightening device |
Dec. 25, 1990 |
| 4923047 |
Machine with variable torque setting |
May. 8, 1990 |
| 4881435 |
Power tool for two step tightening of screw joints |
Nov. 21, 1989 |
| 4827813 |
Torque wrench with amplifying gauge |
May. 9, 1989 |
| 4774864 |
Dynamometric screw-driver |
Oct. 4, 1988 |
| 4669319 |
Electronic torque wrench |
Jun. 2, 1987 |
| 4572041 |
Torque limiting wrench |
Feb. 25, 1986 |
| 4535850 |
Power-operated fastener tool |
Aug. 20, 1985 |
| 4526067 |
Automatic mounting appliance for assembling means |
Jul. 2, 1985 |
| 4502549 |
Spring-coupled power screwdriver |
Mar. 5, 1985 |
| 4459882 |
Gear wrench with torque meter |
Jul. 17, 1984 |
| 4327610 |
Open end ratchet wrench |
May. 4, 1982 |
| 4314490 |
Torque wrench with alarm indicator |
Feb. 9, 1982 |
| 4290329 |
Torque release wrench of the preset type |
Sep. 22, 1981 |
| 4249435 |
Workpiece turning hand tool with torque control |
Feb. 10, 1981 |
| 4244434 |
Electronically indicating torque wrench |
Jan. 13, 1981 |
| 3967513 |
Torque signaling attachment for torque wrench |
Jul. 6, 1976 |
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