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:
Aug. 07, 2007
Filed:
Mar. 04, 2003
Hideki Tsuchiya, Tokyo, JP;
Yoshiharu Miya, Tokyo, JP;
Hideki Tsuchiya, Tokyo, JP;
Yoshiharu Miya, Tokyo, JP;
Kayaba Industry Co., Ltd., Tokyo, JP;
Abstract
Provided are a hydraulic pump, an electromagnetic flow rate control valvethat controls the flow rate of hydraulic oil supplied from the hydraulic pumpto a power steering device PS, and a pressure compensating valvethat maintains a fixed pressure difference between upstream and downstream sides of the electromagnetic flow rate control valveand bypasses an excess flow rate. The electromagnetic flow rate control valvemaintains a predetermined initial opening when a control current is zero, while an opening of the electromagnetic flow rate control valve decreases to become a minimum opening when the control current increases from zero, and the opening gradually becomes larger toward a maximum opening when a predetermined control current is exceeded.