The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 04, 2001
Filed:
Sep. 08, 1999
Exedy Corporation, Osaka, JP;
Abstract
A clutch or damper disk assembly,is provided with a dampening mechanism,that relieves rising of a hysteresis torque, and thereby suppresses generation of noises and vibrations in a dampening mechanism having multi-stage characteristics. The clutch or damper disk assembly,includes an input rotary member,a hub,and a dampening mechanism,The dampening mechanism,is disposed between the input rotary member,and the hub,for transmitting a torque therebetween and dampening torsional vibrations. In the four stage embodiment, the dampening mechanism,includes a set of springs,(first stage), a set of springs,(second stage), a set of springs,(third stage), a set of springs,(fourth stage) and a pair of friction mechanisms,and,The springs,are disposed so as to operate in series with the springs,The springs,have a higher rigidity than the springs,The springs,are disposed so as to operate in series with respect to the springs,The friction mechanisms,and,are disposed so as to operate in series. The friction mechanism,is disposed to operate in parallel with springs,The friction mechanism,is disposed so as to operate in parallel with the springs,The torque generated by the springs,can be larger than a sum of the initial torque of the springs,and the hysteresis torque of the friction mechanism