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Class Information
Number: 81/57.11
Name: Tools > Wrench, screwdriver, or driver therefor > Machine > Gear-operated > With motor
Description: Wrench or screwdriver provided with motor means designed to impart motion to the wrench or screwdriver.










Sub-classes under this class:

Class Number Class Name Patents
81/57.12 Oblique angle drive 9
81/57.14 Parallel axis drive 121
81/57.13 Right angle drive 115


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8584554 Torque multiplier Nov. 19, 2013
8505415 Power wrench with swivelling gear casing Aug. 13, 2013
8495807 Retractable prewinder assembly with infinite adjustability for installation of helically coiled wire inserts Jul. 30, 2013
8397831 Rotary tool having a manual ratchet mechanism Mar. 19, 2013
8387488 Reversible rod tong assembly Mar. 5, 2013
8359951 Wrenching tong Jan. 29, 2013
8141459 Powered adjustable pipe wrench Mar. 27, 2012
8109179 Power tong Feb. 7, 2012
8042434 Safety torque intensifying tool Oct. 25, 2011
7966914 Screwdriver handle Jun. 28, 2011
7931660 Powered tacker instrument Apr. 26, 2011
7878090 Handheld power tool, in particular a power drill or screwdriver Feb. 1, 2011
7861618 Wrenching tong Jan. 4, 2011
7836802 Centrifugal electric impact wrench Nov. 23, 2010
7836795 Power tong device Nov. 23, 2010
7735398 Rechargeable motor-driven ratchet wrench having power-off protection Jun. 15, 2010
7707710 Tool for driving wedges or slides May. 4, 2010
7703330 Power tool Apr. 27, 2010
7530294 Powered adjustable pipe wrench May. 12, 2009
7246541 Pipefitting engaging tool assembly Jul. 24, 2007
7171872 Adjustable mechanical screwdriver Feb. 6, 2007
7032482 Tensioning device apparatus for a bottom feed screw driving tool for use with collated screws Apr. 25, 2006
7028585 Wrenching tong Apr. 18, 2006
7011000 Bolt or nut tightening device having reaction force receiving member Mar. 14, 2006
6860173 Power installation tool for helical coil inserts Mar. 1, 2005
6681659 Automatic fastener apparatus and method Jan. 27, 2004
6631659 Vibrating nutrunner Oct. 14, 2003
6497316 Powered, unidirectional output controlling apparatus Dec. 24, 2002
6311787 Power driven rotary device Nov. 6, 2001
6282990 Flat head power ratchets Sep. 4, 2001
6279714 Powered, undirectional output controlling apparatus Aug. 28, 2001
6273200 Screwdriver with manuel spindel lock Aug. 14, 2001
6079742 Tire changing system with frame mounted jacks and lug wrench Jun. 27, 2000
5984022 Automatic shaft lock Nov. 16, 1999
5881612 Finger guard for tubenut tools Mar. 16, 1999
5557990 Actuating device for use in powered screwdriver Sep. 24, 1996
5427002 Power drive unit for hand tools Jun. 27, 1995
5269733 Power tool plastic gear train Dec. 14, 1993
5224803 Router device Jul. 6, 1993
5172613 Power tongs with improved gripping means Dec. 22, 1992
5090273 Adjustable ratchet wrench Feb. 25, 1992
5016501 Automatic shaft lock May. 21, 1991
4901606 Apparatus for inserting and extracting light bulbs Feb. 20, 1990
4878405 Collet lock for power tool Nov. 7, 1989
4856384 Roof bolt drill pot drive Aug. 15, 1989
4828049 Portable handheld power-driven tool May. 9, 1989
4729260 Two speed gearbox Mar. 8, 1988
4729269 Powered pipe wrench Mar. 8, 1988
4679468 Power driven track shoe spike socket wrench Jul. 14, 1987
4635732 Power-driven hand-held tool with a pneumatic motor Jan. 13, 1987

1 2










 
 
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