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Class Information
Number: 74/424.5
Name: Machine element or mechanism > Gearing > Directly cooperating gears > Spiral
Description: Gearings of the spiral type.










Sub-classes under this class:

Class Number Class Name Patents
74/424.6 Driven rack or shaft 36
74/424.71 Screw and nut 119
74/424.7 Screw 20
74/425 Worm 503


Patents under this class:

Patent Number Title Of Patent Date Issued
8567280 Roller transmission and gearing mechanism Oct. 29, 2013
8141447 Spiral-toothed gear wheel for rack and pinion steering Mar. 27, 2012
8057352 Gear and differential apparatus provided therewith for vehicle Nov. 15, 2011
7827879 Webbed spiral bevel gear Nov. 9, 2010
7707721 Modular transmission system May. 4, 2010
7694599 Gearing as well as a rotary encoder equipped with such gearing Apr. 13, 2010
7640778 Servo drive system and continuous working system of press machine Jan. 5, 2010
7552662 Novolute geometry for power gears Jun. 30, 2009
7475584 Servo-drive system and continuous finishing system of press Jan. 13, 2009
7472619 Gear unit Jan. 6, 2009
7464620 Actuator Dec. 16, 2008
7421922 Device for linearly moving a useful mass Sep. 9, 2008
7346992 Hand-held power tool with angle drive Mar. 25, 2008
6991573 Steering actuator of independent steer-by-wire system Jan. 31, 2006
6609440 Structure of a variable transmission device Aug. 26, 2003
6089116 Gearing stage Jul. 18, 2000
5295433 Value selection mechanism including means for weakening a shaft thereof Mar. 22, 1994
5247846 Quick disconnectable screw device Sep. 28, 1993
5129276 Meshing gear members Jul. 14, 1992
5074831 Limited-slip differential with meshing pairs of worms Dec. 24, 1991
5060531 Screw rotor Oct. 29, 1991
4955248 Angular gear for venetian blinds Sep. 11, 1990
4695233 Screw rotor mechanism Sep. 22, 1987
4656884 Power transmission mechanism Apr. 14, 1987
4649814 Rotary value selector device Mar. 17, 1987
4615230 Gear transmission comprising two worms Oct. 7, 1986
4478103 Worm gear mechanism Oct. 23, 1984
4416168 Transmission and sub-transmission with mutually contending helical gears Nov. 22, 1983
4307629 Torque converter Dec. 29, 1981
4297919 Mechanical power transmission method and means Nov. 3, 1981
4164154 Transmission for two-worm press with counter running worms Aug. 14, 1979
4147223 Logging-while-drilling apparatus Apr. 3, 1979
4144775 Transmission for a two-worm press with counter running worms Mar. 20, 1979
4142422 Speed ratio change mechanism Mar. 6, 1979
3969956 Transmission for multiscrew extruder Jul. 20, 1976











 
 
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