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Class Information
Number: 81/473
Name: Tools > Wrench, screwdriver, or driver therefor > Responsive to torque on work > Rotatable, coaxial, clutching components
Description: Wrench or screwdriver in which a portion of the tool-transmitting force from an input source to the work-contacting portion includes at least two coacting rotatable components, one of the components either (a) impels the other component to rotate about the same axis of rotation with it when force is transmitted to the work below the selected value of torque, or (b) allows the other component to rotate relative to it preventing the transmittal of force from the source to the work when the selected torque is exceeded.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7383756 |
Torque screwdriver structure |
Jun. 10, 2008 |
| 7334509 |
Torque limiting driver and assembly |
Feb. 26, 2008 |
| 7334647 |
Rotary tool |
Feb. 26, 2008 |
| 7311027 |
Electric screwdriver |
Dec. 25, 2007 |
| 7272998 |
Torque-limiting mechanism |
Sep. 25, 2007 |
| 7243581 |
Fixed torque limiting driver |
Jul. 17, 2007 |
| 7219583 |
Pneumatic screwdriver having an adjustable clockwise torque and a maximum counterclockwise torque |
May. 22, 2007 |
| 7216723 |
Pulse torque generator and power tool having the same |
May. 15, 2007 |
| 7197968 |
Screwdriver with adjustable device to limit transmitted torque |
Apr. 3, 2007 |
| 7150212 |
Torque screwdriver |
Dec. 19, 2006 |
| 7137324 |
Hand-held power screwdriver with a low-noise torque clutch |
Nov. 21, 2006 |
| 7100482 |
Electrically powered hand-held screw driver |
Sep. 5, 2006 |
| 7100476 |
Torque wrench for dental implants |
Sep. 5, 2006 |
| 7055415 |
Screwdriver assembly and method with torque measuring scale |
Jun. 6, 2006 |
| 7032476 |
Torque adjustable tool |
Apr. 25, 2006 |
| 7013769 |
Torque adjustable screw driver |
Mar. 21, 2006 |
| 6948410 |
Torque wrench with sleeve for locking rotatable handle |
Sep. 27, 2005 |
| 6892611 |
Screwdriver |
May. 17, 2005 |
| 6851343 |
Screwdriver |
Feb. 8, 2005 |
| 6832533 |
Torque convertible adapter for driving tools |
Dec. 21, 2004 |
| 6752050 |
Wrench with a fixed maximum operational torque |
Jun. 22, 2004 |
| 6701813 |
Wrench with a fixed maximum operational torque |
Mar. 9, 2004 |
| 6668690 |
Screwdriver |
Dec. 30, 2003 |
| 6644450 |
Safety clutch for electrical hand-held tool |
Nov. 11, 2003 |
| 6640674 |
Screwdriver having a variable torque-limiting in-line drive |
Nov. 4, 2003 |
| 6523442 |
Torque tool assembly |
Feb. 25, 2003 |
| 6439086 |
Torque limiting device |
Aug. 27, 2002 |
| 6349625 |
Tool socket |
Feb. 26, 2002 |
| 6345436 |
Combination torque tool and method of adjusting valves and injectors |
Feb. 12, 2002 |
| 6176162 |
Power-driven screwdriver with removable depth stop |
Jan. 23, 2001 |
| 6155147 |
Torque screwdriver with indexing means lock |
Dec. 5, 2000 |
| 6131489 |
Reversible wrench |
Oct. 17, 2000 |
| 6128984 |
Micro-torque limiting, shock limiting tool and subassembly |
Oct. 10, 2000 |
| 6076438 |
Power nutrunner with torque release clutch and a setting tool |
Jun. 20, 2000 |
| 6076439 |
Torque screwdriver with indexing means |
Jun. 20, 2000 |
| 6062114 |
Power nutrunner |
May. 16, 2000 |
| 6053080 |
Device for tightening bolt and/or nut |
Apr. 25, 2000 |
| 5970824 |
Wrench with high inertia torque system and method for using same |
Oct. 26, 1999 |
| 5950509 |
Fastener coupler for power tool |
Sep. 14, 1999 |
| 5870938 |
Bevel locking system for a sliding compound miter saw |
Feb. 16, 1999 |
| 5738469 |
Torque adjustment control mechanism of a hand drill |
Apr. 14, 1998 |
| 5735183 |
Power screwdriver and clutch mechanism used therein |
Apr. 7, 1998 |
| RE35617 |
Torque limiting device for air impact tool |
Sep. 30, 1997 |
| 5655421 |
Micro-torque limiting, shock limiting production tool |
Aug. 12, 1997 |
| 5576501 |
Torque-controlling ratchet connector structure |
Nov. 19, 1996 |
| 5372206 |
Tightening tool |
Dec. 13, 1994 |
| 5356350 |
Motor-driven screwdriver with variable torque setting for equal torques regardless or countertorques by fasteners |
Oct. 18, 1994 |
| 5346022 |
Torque limiting device for air impact tool |
Sep. 13, 1994 |
| 5179617 |
Device for use in connecting optical fibre cables |
Jan. 12, 1993 |
| 5156221 |
Method of and arrangement for controlling the operation of a hand-held electrical device |
Oct. 20, 1992 |
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