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:
Jun. 04, 2013
Filed:
Oct. 08, 2009
Tetsuya Shimizu, Anjo, JP;
Kazunori Ishikawa, Toyota, JP;
Naoyuki Fukaya, Okazaki, JP;
Kazuhiko Kato, Kariya, JP;
Kenichi Tsuchida, Kazu gun, JP;
Tetsuya Shimizu, Anjo, JP;
Kazunori Ishikawa, Toyota, JP;
Naoyuki Fukaya, Okazaki, JP;
Kazuhiko Kato, Kariya, JP;
Kenichi Tsuchida, Kazu gun, JP;
Aisin AW Co., Ltd., Anjo, JP;
Abstract
A power transmission configured with a mechanical pump that generates and deliver a fluid pressure to a clutch. An electromagnetic pump generates and delivers a fluid pressure to the clutch, and an accumulator connects the clutch and the electromagnetic pump, and accumulates fluid pressure acting there between. A switching valve selectively switches between connecting the mechanical pump side and the clutch in a fluid communicating manner and connecting the electromagnetic pump and the clutch in a fluid communicating manner. A valve drive portion that drives the switching valve so as to connect the mechanical pump side and the clutch when the mechanical pump is driving, and drives the switching valve so as to connect the electromagnetic pump and the clutch when the electromagnetic pump is driving in place of the mechanical pump.