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Class Information
Number: 464/68.9
Name: Rotary shafts, gudgeons, housings, and flexible couplings for rotary shafts > Torque transmitted via flexible element > Coil spring > Plural > Perpendicular to shaft > Between axially spaced plates > Spring detail
Description: Subject matter wherein axially spaced plates have particular structure, e.g. configuration, material, etc., of the resilient or elastic elements.

Sub-classes under this class:

Class Number Class Name Patents
464/68.91 Non-coiled or non-metallic 37
464/68.92 With particular seat 109

Patents under this class:

Patent Number Title Of Patent Date Issued
8608577 Damper device Dec. 17, 2013
8602901 Damper for coupling rotation of motor vehicle driving shafts Dec. 10, 2013
8523685 Torque fluctuation absorber Sep. 3, 2013
8328646 Torsional vibration damper Dec. 11, 2012
8287391 Torsional vibration damper Oct. 16, 2012
8210951 Dual-mass flywheel Jul. 3, 2012
8006589 Engine flywheel Aug. 30, 2011
7651399 Torsional vibration damper Jan. 26, 2010
7297064 Torsional vibration damper Nov. 20, 2007
7241224 Torsional vibration damper Jul. 10, 2007
7241225 Torsional vibration insulator Jul. 10, 2007
7207888 Torsional vibration damping device for motor vehicle clutch Apr. 24, 2007
7166030 Torsional vibration damper Jan. 23, 2007
6699131 Torsional vibration damping apparatus Mar. 2, 2004
6416417 Dual mass vibration damping flywheel for vehicles Jul. 9, 2002
6227976 Torsional vibration damper May. 8, 2001
6171193 Torsional vibration damper Jan. 9, 2001
6168526 Damper disk assembly having integral retaining plate connecting means Jan. 2, 2001
5868623 Resilient element having an elastic portion and seat portions for use in a vibration damping device Feb. 9, 1999
5769722 Trapezoidal shaped coil spring for a damper disc apparatus Jun. 23, 1998
5690554 Torsion damper for a clutch disk Nov. 25, 1997
5657845 Vibration dampening clutch driven disc Aug. 19, 1997
5562543 Torsion damper, especially for a motor vehicle Oct. 8, 1996
5289737 Elastic clutch Mar. 1, 1994
5080215 Torsion vibration damper Jan. 14, 1992
4947700 Continuously variable transmission system and long travel torsion damper therefor Aug. 14, 1990
4884996 Elastic coupling with spring guides Dec. 5, 1989
4813295 Fly-wheel unit with disengageable friction device Mar. 21, 1989
4499981 Damper disc with concentric springs including hourglass-shaped springs to reduce the effect of centrifugal forces Feb. 19, 1985
4014423 Clutch plate for a friction clutch Mar. 29, 1977

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