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:
Jan. 06, 1987
Filed:
Oct. 29, 1984
Applicant:
Inventor:
Frederick J Adams, Clevedon, GB;
Assignee:
TRW Cam Gears Limited, Clevedon, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16K / ; F16J / ;
U.S. Cl.
CPC ...
13762522 ; 9137 / ; 277-3 ; 277 27 ; 277177 ; 251900 ;
Abstract
In a sealing arrangement for a rotary fluid pressure control valve, such as a power steering control valve, a resilient sealing ring is located in a ring groove for sealing engagement with an outer cylindrical member. Frictional losses and a tendency for the sealing assembly to jam are reduced by equalization of the fluid pressure on opposite faces of the sealing ring. This is achieved by virtue of a tapered ring cross-sectional profile and other ring profiles disclosed herein, or by provision of a relieved zone in the ring groove for transmission of fluid pressure.