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. 03, 1981
Filed:
Nov. 16, 1979
Applicant:
Inventor:
Michael L Duhaime, Detroit, MI (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B60K / ;
U.S. Cl.
CPC ...
192-323 ; 192-327 ; 192-331 ; 192-324 ; 74868 ;
Abstract
An electro-hydraulic control for a power transmission has a solenoid controlled shift valve and a hydraulic controlled shift valve. Preferably, the solenoid controlled valve controls the control clutch while the hydraulic controlled valve controls the clutch or brake which is effective to establish a drive ratio in the transmission. When a ratio change involving the disengagement of the clutch or brake occurs, the exhaust fluid therefrom operates on an electrical switch which is effective to provide momentary disengagement of the torque converter clutch.