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. 03, 1992
Filed:
Dec. 19, 1990
Applicant:
Inventors:
Chitoshi Morishige, Hiroshima, JP;
Tomoo Sawasaki, Hiroshima, JP;
Assignee:
Mazda Motor Corporation, Hiroshima, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B60K / ; B60K / ;
U.S. Cl.
CPC ...
74866 ; 74867 ; 74868 ; 3644241 ;
Abstract
A control apparatus for a transmission apparatus which controls the change ratio by varying, by hydraulic pressure, the effective radius of a drive pulley (primary pulley) and that of a follower pulley (secondary pulley) with a belt arranged therebetween. The apparatus a change ratio control valve for controlling the change ratio and a change ratio fixing valve for forcibly fixing the change ratio if the engine is about to rotate excessively so that the excessive rotation of the engine is prevented.