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:
Apr. 10, 1979
Filed:
Apr. 27, 1977
Applicant:
Inventor:
Shigeru Moriya, Toyota, JP;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B60K / ;
U.S. Cl.
CPC ...
74869 ; 74867 ; 74865 ; 7475 / ;
Abstract
An oil pressure control means for operating an automatic transmission for automobiles in a manner to establish various speed shift stages in accordance with the balance of the throttle pressure and the governor pressure, including a combination of a thermo-sensitive control means operable in response to the engine temperature and an oil passage change-over means, said combination being adapted to supply the line pressure in lieu of the throttle pressure to a speed shift valve which establishes the highest speed stage when the engine is not yet warmed up thereby positively shifting the speed shift valve to the lower speed shift position by over-balancing the governor pressure by the line pressure.