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:
Nov. 21, 1989
Filed:
Jun. 27, 1988
Applicant:
Inventor:
James A Redelman, Indianapolis, IN (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16D / ; B60K / ;
U.S. Cl.
CPC ...
188290 ; 60337 ; 192 / ; 1882 / ; 188296 ;
Abstract
A control system for a hydraulic retarder includes an inlet regulator valve and an outlet regulator valve. The inlet regulator valve admits fluid to the retarder at a predetermined pressure. The outlet regulator valve prevents fluid flow from the retarder unless the main system pressure is greater than a predetermined value.