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:
Jan. 30, 1979
Filed:
May. 06, 1977
Kazuo Ishikawa, Ichinomiya, JP;
Aisin Seiki Kabushiki Kaisha, Kariya, JP;
Abstract
Automatic transmission for automobiles including a hydraulic torque converter and a transmission gear mechanism which has a plurality of friction devices such as clutch and brakes whereby a plurality of different driving stages can be provided through selective actuation of the friction devices. Trimmer valve is provided for each actuator of the friction device to provide a supply of gradually increasing hydraulic pressure. The trimmer valve is applied at its return port with a pressure corresponding to the engine throttle valve position so that the initial pressure to be applied to the actuator is determined in accordance with the engine throttle valve position.