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. 31, 1978
Filed:
Nov. 21, 1977
Applicant:
Inventor:
Jack H Van Gorder, Chelsea, MI (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16J / ;
U.S. Cl.
CPC ...
277 27 ; 277 29 ; 277 70 ; 277152 ; 277165 ; 277215 ;
Abstract
A lip type oil seal for a cylinder and piston arrangement, such as in a fluid clutch, wherein the seal separates two working chambers formed by the piston and cylinder. The seal has radial grooves formed in an annular surface facing one chamber, a flat annular sealing surface facing toward the other chamber, and a radial lip portion sealing on the circumference of the piston. The radial grooves permit fluid flow between the chambers when both chambers are exhausted after being pressurized. The flat annular sealing surface prevents fluid flow between the chambers when only the one chamber is pressurized and not exhausted.