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:
Jul. 10, 1979
Filed:
Feb. 18, 1977
Applicant:
Inventors:
Yoshio Sunohara, Yokohama, JP;
Kunio Ohtsuka, Yokohama, JP;
Wataru Ishimaru, Fujisawa, JP;
Takahiro Yamamori, Tokyo, JP;
Toshio Shibuya, Yokosuka, JP;
Assignee:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16H / ;
U.S. Cl.
CPC ...
74732 ; 74733 ;
Abstract
In an automatic power transmission including hydrodynamic torque transmitting means such as a torque converter or a fluid coupling and fluid-operated direct-drive clutch means combined with the torque converter or fluid coupling, control valve means is provided so that the direct-drive condition is achieved from the top-gear condition at a retarded timing after the top gear has been attained under low-load conditions of the engine although direct-drive condition is established simultaneously when an upshift is made to the top gear under high-load operating conditions of the engine.