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. 18, 1992
Filed:
Jan. 19, 1990
Chitoshi Morishige, Hiroshima, JP;
Tomoo Sawasaki, Hiroshima, JP;
Mazda Motor Corporation, Hiroshima, JP;
Abstract
A hydraulic control system for a steplessly variable transmission, having primary and secondary pulley assemblies, controls a line pressure for complementarily varying effective diameters of the primary and secondary pulley assemblies so as to steplessly vary a transmission ratio of the steplessly variable transmission. The line pressure is changed according to an engine output transmitted to the primary pulley assembly from an engine and a transmission ratio of the steplessly variable transmission. A decrease of pressure is caused in the line pressure according to a thrust exerted on either one of the primary and secondary pulley assemblies caused by centrifugal force.