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:
May. 08, 1989
Applicant:
Inventor:
Wataru Ishimaru, Ebina, JP;
Assignee:
Nissan Motor Co., Ltd., Yokohama, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16H / ; F16H / ;
U.S. Cl.
CPC ...
74867 ; 7466 / ; 74868 ; 474 28 ;
Abstract
An automatic transmission includes a gear power train and a V-belt type continuously variable power train which are connected in parallel between input and output shafts. A relatively low hydraulic fluid pressure is supplied to a follower pulley cylinder chamber when the V-belt type continuously variable power train is rendered inoperable, whereas a sufficiently high hydraulic fluid pressure is supplied to the follower pulley cylinder chamber when the V-belt type continuously variable power train is rendered operable, inducing a sufficiently high force which the follower pulley grips the V-belt with.