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:
Feb. 25, 2003
Filed:
Apr. 25, 2001
Hideo Konishi, Saitama, JP;
Bosch Braking Systems Co., Ltd., Tokyo, JP;
Abstract
A pump including a pump chamber formed in a pump body between a cam ring and a rotor The cam ring is formed so as to move in a direction whereby the pump capacity of the pump chamber increases and decreases. First and second fluid pressure chambers and are formed at opposite sides of the cam ring The pump has a spool that is axially moved by a difference in fluid pressure between upper and lower stream sides of a metering throttle connected to a discharge side passage of the pump chamber. The spool is part of a control valve that controls fluid pressure in at least the first fluid pressure chamber. An electronic driving unit, for example, a solenoid applies axial thrust to the spool of the control valve.