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:
Jul. 26, 2011
Filed:
Jan. 16, 2008
Tsuyoshi Hirayanagi, Fukuroi, JP;
Tsuyoshi Hirayanagi, Fukuroi, JP;
NSK-Warner Kabushiki Kaisha, Tokyo, JP;
Abstract
In a friction plate, segment piecesof a friction material are bonded onto a core plateat intervals in a circumferential direction.denotes a spline tooth. On each segment piece, there are formed a first oil groove which is made to open to an inside-diameter side of the segment piece and has its end portion part-way along the segment piece (hereinafter, referred to as a first oil groove) and a second oil groove which is made to open to an outside-diameter side of the segment piece and has its end portion part-way along the segment piece (hereinafter, referred to as a second oil groove). Segment pieces in which a first oil grooveand second oil groovesare pressure molded and segment pieces in which a first oil groovesand second oil groovesare stamped are arranged alternately.