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:
Oct. 06, 2009
Filed:
Dec. 26, 2007
Masahiro Kobayashi, Fukuroi, JP;
Tsuyoshi Hirayanagi, Fukuroi, JP;
Ritsuo Toya, Fukuroi, JP;
Masahiro Yamada, Fukuroi, JP;
Hirokazu Hino, Fukuroi, JP;
Masahiro Kobayashi, Fukuroi, JP;
Tsuyoshi Hirayanagi, Fukuroi, JP;
Ritsuo Toya, Fukuroi, JP;
Masahiro Yamada, Fukuroi, JP;
Hirokazu Hino, Fukuroi, JP;
NSK-Warner K.K., Tokyo, JP;
Abstract
A friction plate for a wet-type multiplate clutch is provided with a core plate and friction linings bonded on opposite sides of the core plate, respectively. Each of the friction linings is composed of plural segment pieces bonded at angular intervals on the corresponding one of said opposite sides. The segment pieces each have at least one first oil groove and at least one second oil groove. The first oil groove opens to a radially-inner side of its corresponding segment piece and has a closed end portion located in a radially-intermediate part of the corresponding segment piece, and the second oil groove opens to a radially-outer side of the corresponding segment piece and has a closed end portion located in another radially-intermediate part of the corresponding segment piece. The segment pieces are each provided in a friction surface thereof with at least one oil pocket closed at a circumference thereof.