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:
Aug. 09, 2011
Filed:
Nov. 28, 2008
Tetsuya Shimizu, Anjo, JP;
Kenichi Tsuchida, Anjo, JP;
Akitomo Suzuki, Anjo, JP;
Kazunori Ishikawa, Anjo, JP;
Masamichi Yamaguchi, Anjo, JP;
Satoshi Nishio, Hekinan, JP;
Tetsuya Shimizu, Anjo, JP;
Kenichi Tsuchida, Anjo, JP;
Akitomo Suzuki, Anjo, JP;
Kazunori Ishikawa, Anjo, JP;
Masamichi Yamaguchi, Anjo, JP;
Satoshi Nishio, Hekinan, JP;
Aisin AW Co., Ltd., Anjo, JP;
Abstract
A hydraulic control device for an automatic transmission includes a first solenoid valve, a second solenoid valve, a third solenoid valve, a preliminary shift speed switching valve, and a hydraulic pressure supply switching valve. A second friction engagement element is engaged at high speed side shift speeds, a low speed that is one of low speed side shift speeds is achieved by engagement of a first friction engagement element and a third friction engagement element, and a high speed that is one of the high speed side shift speeds is achieved by engagement of a second friction engagement element and the third friction engagement element.