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. 09, 1979
Filed:
Oct. 27, 1977
Applicant:
Inventor:
John W Riddel, Fenton, MI (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B60K / ;
U.S. Cl.
CPC ...
180108 ; 1231 / ; 192 / ;
Abstract
A vehicle vacuum operated road speed control system has a flow amplifier valve in the circuit. The system uses a very low flow controlled by a system control valve and applied to the amplifier valve. The amplifier valve receives vacuum directly from a vacuum source and provides an output to the vehicle road speed control servomotor which is proportional to the control flow but is at a much higher flow level. This leads to the improved system performance.