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. 16, 1979
Filed:
May. 06, 1977
Kazuo Ishikawa, Ichinomiya, JP;
Aisin Seiki Kabushiki Kaisha, Kariya, JP;
Abstract
Automatic transmissions for automobiles include a hydraulic torque converter and a transmission gear mechanism which has a plurality of friction devices such as a clutch and brakes whereby a plurality of different driving stages can be provided through selective actuation of the friction devices. The automatic transmissions further include an over-drive system comprising at least an OD shift valve and a Low-High shift valve. The OD shift valve is applied through the L-H shift valve with a pressure sufficient to shift gear devices to a high speed position or a low speed position. A kick-down valve is disposed between the engine throttle position valve and the L-H shift valve to enable the pressure in the throttle line to increase when the kick down operation takes place.