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Class Information
Number: 81/429
Name: Tools > Wrench, screwdriver, or driver therefor > Responsive to movement of work
Description: Wrench or screwdriver wherein the operation of the wrench or screwdriver is stopped or it signals when either the distance traveled by or the number of rotations of the work exceed a selected amount.










Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
5457866 Bolt-tightening method using an impact wrench Oct. 17, 1995
5431660 Spring loaded screw and driver/extractor therefor Jul. 11, 1995
5380132 Depth adjusting system for a power tool Jan. 10, 1995
5341708 Fastener support apparatus Aug. 30, 1994
5341704 Depth adjustment assembly for power tool Aug. 30, 1994
5271471 Power driven screwdriver Dec. 21, 1993
5226327 Screwing device with means for measuring the tightening strain in a bolt Jul. 13, 1993
5209308 Power driven screwdriver May. 11, 1993
5207127 Fastener support apparatus May. 4, 1993
5182973 Depth locator apparatus for insert bit holders Feb. 2, 1993
5172616 Torque wrench Dec. 22, 1992
5142954 Masonry anchor installation tool Sep. 1, 1992
5067567 Remote handling apparatus Nov. 26, 1991
5044233 Depth adjuster for rotary tools such as screwdrivers Sep. 3, 1991
5012708 Depth locator apparatus for insert bit holders May. 7, 1991
4906980 Detector of false rotation of power screwdriver Mar. 6, 1990
4899591 Ultrasonic load indicating member, apparatus and method Feb. 13, 1990
4856389 Device for setting fastener elements and pins Aug. 15, 1989
4809572 Power driven screwdriver Mar. 7, 1989
4762035 Depth adjusting device for screwdrivers Aug. 9, 1988
4760746 Torque to yield indicator and method Aug. 2, 1988
4753142 Power-driven screwing head Jun. 28, 1988
4653358 Tools for use in tightening or removing screw-threaded fasteners Mar. 31, 1987
4647260 Depth-adjusting system for a power tool Mar. 3, 1987
4630512 Adjustable motor-operated screw driving device Dec. 23, 1986
4625597 Screw driving apparatus Dec. 2, 1986
4617843 Electrically-operated driver Oct. 21, 1986
4613000 Apparatus for fastening misaligned structural members Sep. 23, 1986
4608872 Hand-operated ratchet spanner for tightening screws Sep. 2, 1986
4604921 Adjustable control assemblies Aug. 12, 1986
4603464 Stand jumping and stabbing guide device and method Aug. 5, 1986
4592257 Hand-held screw driving device with adjustable depth stop Jun. 3, 1986
4545270 Device for assuring predetermined joint loading in roof insulation assemblies Oct. 8, 1985
4515045 Automatic wrench for screwing a pipe string together and apart May. 7, 1985
4507817 Connector and insertion tool Apr. 2, 1985
4302991 Fastener plunging apparatus Dec. 1, 1981
4296656 Driver bit attachment Oct. 27, 1981
4287923 Screwing heads Sep. 8, 1981
4237946 Chuck for holding and driving fasteners, such as screws or nails Dec. 9, 1980
4176436 Method and apparatus for counting turns when making threaded joints Dec. 4, 1979
4162639 Load indicating nut wrench Jul. 31, 1979
4125040 Power tong apparatus Nov. 14, 1978
4107800 Combination drilling and wrenching tool Aug. 22, 1978
4095325 Method for tightening bolts Jun. 20, 1978
4083270 Air motor having angular displacement control means Apr. 11, 1978
4043365 Automatic screw driver having brake responsive ball clutch means Aug. 23, 1977
4030383 Nose piece for screwguns Jun. 21, 1977
3973858 Pneumatic control device for terminating the machining operation of a spindle machine Aug. 10, 1976
3934629 Screw driver Jan. 27, 1976

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