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. 17, 1998
Filed:
Jul. 30, 1997
Applicant:
Inventor:
Tatsuei Sakata, Kashiwazaki, JP;
Assignee:
Kabushiki Kaisha Riken, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16J / ;
U.S. Cl.
CPC ...
277407 ; 277496 ; 277944 ; 277938 ; 277936 ; 428 345 ; 428 357 ; 428328 ;
Abstract
A sliding member used as a sealing ring for a rotary shaft made of a lightweight aluminum alloy in an automatic transmission instead of a conventional cast iron sealing ring in order to prevent leakage of oil and reduce abrasion of the shaft consists of a PEEK resin composition which includes, as binder, 15.about.20 percent by weight of amorphous alumina powder having an average particle diameter of 5.mu. or less, 3.about.8 percent by weight of graphite powder having an average particle diameter of 5.mu. or less and 6.about.9 percent by weight of carbon powder having an average particle diameter of 30.mu. or less.