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:
May. 28, 1991
Filed:
Apr. 03, 1989
Applicant:
Inventor:
Cecil C Pugh, Kettering, OH (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B60T / ;
U.S. Cl.
CPC ...
60562 ; 60589 ; 60592 ;
Abstract
A dual chamber master cylinder has a center compensating valve for bypass compensation of the secondary pressurizing chamber, eliminating lip seal damage to the secondary piston seal that can occur when a bypass port is provided in the wall of the secondary pressurizing chamber.