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:
Feb. 13, 1990
Filed:
Apr. 19, 1988
Applicant:
Inventors:
Keiji Bota, Hiroshima, JP;
Tomoo Sawasaki, Hiroshima, JP;
Assignee:
Mazda Motor Corporation, Hiroshima, JP;
Primary Examiner:
Int. Cl.
CPC ...
B60K / ;
U.S. Cl.
CPC ...
74868 ; 74862 ;
Abstract
A hydraulic control system for an automatic transmission including a pressure regulating valve responsive to a pilot pressure to produce a regulated line pressure which is applied through a switching valve to an actuator of a clutch. The switching valve is also responsive to the pilot pressure to allow the pilot pressure to be introduced to the actuator when the pilot pressure is below the predetermined value and passes the line pressure to the actuator when the pilot pressure is above the predetermined value.