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Class Information
Number: 254/352
Name: Implements or apparatus for applying pushing or pulling force > Apparatus for hauling or hoisting load, including driven device which contacts and pulls on cable > Device includes rotatably driven, cable contacting drum > Drive includes intermeshing gears > Drive also includes ratchet wheel and driving pawl
Description: Apparatus wherein the drive also includes a rotatable wheel having teeth on its perimeter and a pawl which is reciprocated along a linear or angular path by the power source, the pawl alternately engages the teeth and turns the wheel at least a portion of a revolution around its axis during movement in one of its directions and disengages the teeth during its return movement in the other direction.










Sub-classes under this class:

Class Number Class Name Patents
254/353 Plural driving pawls 17


Patents under this class:

Patent Number Title Of Patent Date Issued
8579259 Two speed winch assembly Nov. 12, 2013
8256745 Portable hoist Sep. 4, 2012
7533869 Ratcheted lift mechanism May. 19, 2009
7401765 Winching and drawing machine Jul. 22, 2008
6938881 Manual marine winch with lead in webbing strap Sep. 6, 2005
6588731 Hoisting and towing device Jul. 8, 2003
6578824 Overload-preventing device for winch Jun. 17, 2003
6517054 Lever hoist with overload preventing device Feb. 11, 2003
6439078 Overload protection device for a lever Aug. 27, 2002
6406001 Chain lever hoist Jun. 18, 2002
6352243 Chain hoist with overload prevent device Mar. 5, 2002
6291845 Fully-dielectric-isolated FET technology Sep. 18, 2001
6224039 Chain block May. 1, 2001
6059267 Lever hoist May. 9, 2000
6019561 Device for erecting a wall Feb. 1, 2000
5954285 Driving arrangement for a motorized fishing reel Sep. 21, 1999
5791579 Overload prevention clutch assembly Aug. 11, 1998
5769398 Lever hoist Jun. 23, 1998
5647576 Chain lever hoist Jul. 15, 1997
5641151 Chain lever hoist Jun. 24, 1997
5586751 Manual chain block Dec. 24, 1996
5575457 Structure for controlling braking action of a mechanical brake of a lever type hoist and traction machine Nov. 19, 1996
5575456 Lever operated hoist Nov. 19, 1996
5538222 Chain lever hoist Jul. 23, 1996
5535988 Lever type hoist having reverse rotation preventive mechanism Jul. 16, 1996
5531651 Differential gear system using the change in input direction to control the output speed ratio Jul. 2, 1996
5511447 Automatic ratchet block Apr. 30, 1996
5472172 Lever stop for a lever operated hoist Dec. 5, 1995
5472171 Free rotation control apparatus for a hoist and traction machine Dec. 5, 1995
5421553 Lever-type winch idler device Jun. 6, 1995
5398912 Hoist including brake cover and operating lever coupling Mar. 21, 1995
5364073 Free-chain device for a lever hoist Nov. 15, 1994
5351937 Hoist and traction machine with free rotation control Oct. 4, 1994
5319997 Automatic ratchet block Jun. 14, 1994
5305989 Hoist and traction machine with free rotation control Apr. 26, 1994
5238226 Lever operated hoist Aug. 24, 1993
5156377 Lever-operated hoist Oct. 20, 1992
5149058 Lever-operated hoist Sep. 22, 1992
5088694 Lever type hoist Feb. 18, 1992
4768754 Manual hoist with overload preventer Sep. 6, 1988
4469308 Lever hoist Sep. 4, 1984
4468005 Lever hoist Aug. 28, 1984
4208036 Winch Jun. 17, 1980
4143855 Winch Mar. 13, 1979
4132322 Silo unloader winch drive Jan. 2, 1979
4106754 Cable hauling winch Aug. 15, 1978
3942762 Winch for sailing ships Mar. 9, 1976











 
 
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