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. 06, 2010
Filed:
Nov. 16, 2006
Katsuhisa Ishii, Okazaki, JP;
Minoru Todo, Takahama, JP;
Masato Nakano, Hekinan, JP;
Takuya Nakajima, Toyota, JP;
Hirofumi Ota, Toyota, JP;
Atsushi Honda, Seto, JP;
Kazutoshi Nozaki, Aichiken, JP;
Katsuhisa Ishii, Okazaki, JP;
Minoru Todo, Takahama, JP;
Masato Nakano, Hekinan, JP;
Takuya Nakajima, Toyota, JP;
Hirofumi Ota, Toyota, JP;
Atsushi Honda, Seto, JP;
Kazutoshi Nozaki, Aichiken, JP;
Aisin AW Co., Ltd., , JP;
Abstract
A hydraulic servo for a brake in an automatic transmission has a piston secured against rotation without provision of a protrusion on the piston engaging the transmission casing. The piston of the hydraulic servo has an inner cylindrical surface configured to grasp, along their lengths, return springs compressed between the piston and a return plate to which the return springs are fixed. The return plate is bolted to a bulkhead portion of the transmission case and, thus, the piston member is fixed to the bulkhead portion and thereby prevented from rotating.