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:
Mar. 30, 1999
Filed:
Jan. 31, 1997
Applicant:
Inventors:
Kazuo Sasaki, Hiroshima, JP;
Minoru Kuriyama, Higashihiroshima, JP;
Assignee:
Mazda Motor Corporation, Hiroshima-ken, JP;
Primary Examiner:
Int. Cl.
CPC ...
F16H / ;
U.S. Cl.
CPC ...
477156 ; 477158 ;
Abstract
A hydraulic control system for shifting an automatic transmission to desired gears by selectively coupling and uncoupling friction coupling elements which controls a shifting pressure necessary to bring a friction coupling element into coupling according to a presumed friction coefficient of the friction coupling element during shifting so as thereby to achieve an intended gear shift over an intended shifting time.