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:
Jul. 04, 1978
Filed:
Nov. 17, 1975
John W Riddel, Fenton, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A vehicle road speed control system having a redundant release valve assembly. A solenoid control actuated control valve energized by application of the vehicle brakes dumps the higher pressure side of the servomotor to the lower pressure side to balance the pressures on the power wall. The power wall return spring and the throttle valve return spring respectively return the power wall and the throttle valve to the closed throttle position. If the effective opposed areas of the power wall are substantially different, a bleed orifice is utilized to offset the difference. The servomotor output rod extends through the higher pressure servomotor chamber in two illustrated embodiments and through the lower servomotor pressure chamber in another embodiment.