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. 28, 2014
Filed:
Dec. 02, 2010
Tetsuya Shimizu, Anjo, JP;
Kazuhiko Kato, Kariya, JP;
Kazunori Ishikawa, Toyota, JP;
Noriomi Fujii, Anjo, JP;
Tetsuya Shimizu, Anjo, JP;
Kazuhiko Kato, Kariya, JP;
Kazunori Ishikawa, Toyota, JP;
Noriomi Fujii, Anjo, JP;
Aisin AW Co., Ltd., Anjo, JP;
Abstract
A pump apparatus configured with a first pump for pumping working fluid in accordance with a reciprocation of a piston using a space between a first open/close valve for suction and a second open/close valve for discharge as a pump chamber. The pump apparatus is also configured a first flow passage for supplying the working fluid from a supply source to an operation subject via the first open/close valve, the pump chamber, and the second open/close valve in accordance with an operation of the first pump. A second flow passage supplies the working fluid pumped by a second pump, which is different from the first pump, to the pump chamber. A selector is configured to select either the first flow passage or the second flow passage.