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:
Sep. 20, 2011
Filed:
Jun. 16, 2006
Masakazu Kurata, Yokohama, JP;
Takumi Hisazumi, Kanagawa, JP;
Yasuhito Nakakuki, Kanagawa, JP;
Mitsuaki Nakada, Kanagawa, JP;
Masakazu Kurata, Yokohama, JP;
Takumi Hisazumi, Kanagawa, JP;
Yasuhito Nakakuki, Kanagawa, JP;
Mitsuaki Nakada, Kanagawa, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In a pump device applicable to a power steering apparatus, a pump element is housed within a pump housing and is configured to drain a working oil, an electric motor is configured to drive the pump element, a reservoir tank is installed on the housing and is configured to reserve the working oil supplied to the oil element, a passage is formed within the pump housing and is connected to the pump element, and a control valve is installed in the pump housing, is configured to communicate with the passage, and is configured to control a flow of the working oil caused to flow through the passage.