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:
Aug. 21, 2007
Filed:
Mar. 06, 2006
Hiroyuki Kinpara, Fukuroi, JP;
Hiroyuki Kinpara, Fukuroi, JP;
NSK-Warner K.K., Tokyo, JP;
Abstract
The present invention provides a multi-plate clutch comprising drive plates which are coaxially disposed within a clutch housing and to which friction materials are fixed, driven plates which are alternately arranged with the drive plates and a piston having an urging surface for providing an axial load to engage the drive plates and the driven plates with each other and wherein a plurality of urging portions protruding toward the driven plate are formed on the urging surface of the piston and the urging portions are provided in correspondence to an arrangement of spline projections provided on an outer periphery of the driven plate un-equidistantly along a circumferential direction.