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. 15, 1991
Filed:
Nov. 01, 1990
Brad N Venetos, Spring Valley, OH (US);
Tomas L Shroyer, Centerville, OH (US);
Kenneth R Hous, Beavercreek, OH (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A dual brake circuit master cylinder with center compensation on the second circuit is provided. The master cylinder has a second piston mounted within a housing bore sealably separating a second reservoir passage from the second brake circuit passage when the pressure within the bore exposed to the second brake circuit passage exceeds the pressure within the bore exposed to the second reservoir passage. The second piston also has a compensating passage with an inclusive valve seat with an inserted compensating valve allowing fluid communication between the second reservoir and second brake circuit passages when the pressure in the second reservoir is greater than the pressure in the brake circuit. An auxiliary piston is provided to insure that the second compensating valve is retained to an open position when ever the second piston is in a retracted position and excessive pressure in the brake second circuit has acted to close the second compensating valve.