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. 07, 1991
Filed:
Oct. 18, 1989
Applicant:
Inventors:
Satoshi Machida, Osaka, JP;
Akio Hattori, Osaka, JP;
Assignee:
Kubota Ltd., Osaka, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16D / ;
U.S. Cl.
CPC ...
192-357 ; 192-008 ;
Abstract
A vehicle change-speed control construction for selectively engaging and disengaging a hydraulic clutch of a propelling transmission system according to a change-speed operation. Through maximum simplification and rationalization, the construction has a hydraulic control system comprised of minimized number of components consisting essentially of one pilot pressure controlled selector valve and a plurality of check valves operable in response to a change-speed operation. The improved construction is extremely simple and economical, yet achieves higher operational efficiency without transmission delay.