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. 17, 2012
Filed:
Aug. 25, 2009
Yuhei Yoshioka, Anjo, JP;
Kazuyuki Noda, Anjo, JP;
Naoki Itazu, Nagoya, JP;
Yoshinobu Nozaki, Anjo, JP;
Yuhei Yoshioka, Anjo, JP;
Kazuyuki Noda, Anjo, JP;
Naoki Itazu, Nagoya, JP;
Yoshinobu Nozaki, Anjo, JP;
Aisin AW Co., Ltd., Aichi-Ken, JP;
Toyota Jidosha Kabushiki Kaisha, Aichi-Ken, JP;
Abstract
A hydraulic control device for an automatic transmission that includes a fail-safe function to establish a fail-safe traveling state where a predetermined shift speed is established, and a fail-safe stopping state where the primary pressure to all of the hydraulic servos is cut-off when a failure occurs. The hydraulic control device is able to switch between the fail-safe traveling state and the fail-safe stopping state even after a failure occurs, thereby enhancing a limp-mode function.