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:
Nov. 14, 2000
Filed:
Mar. 23, 1998
Hirotaka Fukushima, Neyagawa, JP;
Exedy Corporation, Osaka, JP;
Abstract
The present invention relates to a clutch disk assembly having a dampening mechanism which includes a hub and a pair of plates joined together at a radial outer portion thereof. The hub and the plates define a generally annular fluid chamber therebetween. An undulated flat-spring is disposed in the annular fluid chamber. The undulated flat-spring is compressible between the hub and a portion of one of the pair of plates in response to relative rotary displacement between the hub and the pair of plates. A viscous fluid is disposed in the annular fluid chamber and has a kinematic viscosity within a range of 500-50,000 cSt at 60.degree. C. A gap is defined between radially extending inner sides of the annular fluid chamber and corresponding sides of the undulated flat-spring. The gap is within a range of 0.1 to 0.6 mm.