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:
May. 17, 1977
Filed:
Jul. 17, 1974
Applicant:
Inventor:
Noboru Murakami, Nagoya, JA;
Assignee:
Aisin Seiki Kabushiki Kaisha, Kariya, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B60K / ; F16K / ;
U.S. Cl.
CPC ...
74868 ; 192- 032 ; 1921 / ;
Abstract
A pressure control circuit for use in connection with an automatic transmission of a vehicle is disclosed which comprises a pressure regulating valve for regulating a hydraulic pressure discharged from a pressure source and for actuating frictional engaging means, said pressure regulating valve including an accumulator, a valve spool and a spring urging said valve spool in one direction, said accumulator including a hydraulic chamber, into which is supplied the hydraulic pressure which will mechanically impart an additional force to said spring at a given value of the hydraulic pressure.