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Class Information
Number: 254/103
Name: Implements or apparatus for applying pushing or pulling force > Screw > Geared
Description: Screw pushing and pulling implement comprising rotary gears for actuating the screw or the screw-actuating nut.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8690127 Vehicle lift system accessory Apr. 8, 2014
8602391 Telescopically collapsible scissor car jack Dec. 10, 2013
8485508 Mechanically operated hand-held forcible entry device Jul. 16, 2013
8413962 Device and method for moving a working means in the ground Apr. 9, 2013
8377140 Expandable spinal implant device Feb. 19, 2013
8365331 Auto powered jack apparatus Feb. 5, 2013
8360397 Ball screw device Jan. 29, 2013
8308151 Elevator assembly for robotic positioning of a workpiece Nov. 13, 2012
8292040 Double screw elevator Oct. 23, 2012
8162289 Modular jack apparatus for lifting floors and other structures Apr. 24, 2012
8052125 Motor drive for a camper jack Nov. 8, 2011
7997846 Drywall panel lifter Aug. 16, 2011
7503531 Height adjusting mechanism Mar. 17, 2009
7472889 Vehicle lift system Jan. 6, 2009
7458562 Extendible and retractable actuator Dec. 2, 2008
7401764 Electronic jack Jul. 22, 2008
7264226 Remotely-adjustable support apparatus and methods Sep. 4, 2007
6988712 Screw jack Jan. 24, 2006
6910677 Portable power jack device Jun. 28, 2005
6874764 Mechanical screw jack having stroke limiting nut Apr. 5, 2005
6764065 Trailer jack assistance apparatus Jul. 20, 2004
6746142 Headlamp for automobile with aiming screw having locking portion Jun. 8, 2004
6739580 Electrically operable vehicle jacks May. 25, 2004
6722635 Multiple screw jack Apr. 20, 2004
6685169 Motor operated jack for vehicles Feb. 3, 2004
6659428 Jack for automobile Dec. 9, 2003
6513790 Electromotive adjustment assembly Feb. 4, 2003
6499722 Screw jack Dec. 31, 2002
6446937 Removable gear drive for mechanical jack Sep. 10, 2002
6299138 Directly driving electromotive jack device for releasing torsional force Oct. 9, 2001
6250170 Load directing trunnion mount for linear actuator Jun. 26, 2001
6158720 Anti-backlash nut assembly Dec. 12, 2000
6145812 Jack Nov. 14, 2000
6109594 Disengageable force regulator for linear electric screwjack Aug. 29, 2000
6082207 Vertically operating ball screw and nut actuator system for synchronously moving multiple elements in load balanced opposed directions, and methods of constructing and operating ball screw Jul. 4, 2000
5992826 Motorized jack Nov. 30, 1999
5906356 Adjustable lifting apparatus May. 25, 1999
5758867 Lifting device for the controlled vertical transfer of objects Jun. 2, 1998
5722304 Linear actuator Mar. 3, 1998
5687953 Jack apparatus Nov. 18, 1997
5664762 Automotive screw jack Sep. 9, 1997
5636705 Apparatus for moving a work platform along a rail Jun. 10, 1997
5609332 Device for lifting and holding cabinets Mar. 11, 1997
5542647 Two-speed jack Aug. 6, 1996
5496014 Motorized screw jack assembly Mar. 5, 1996
5492436 Apparatus and method for moving rig structures Feb. 20, 1996
5488880 Two-speed linear actuator driven by two motors Feb. 6, 1996
5398780 Linear actuator with speed controlling brake Mar. 21, 1995
5393036 Continuously engaged tangential driving tool Feb. 28, 1995
5343581 Housing and drive mechanism for screw lift of hospital bed Sep. 6, 1994

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