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. 30, 1992
Filed:
Apr. 12, 1990
Akihiko Sekiguchi, Saitama, JP;
Akebono Brake Industry Co., Ltd., Tokyo, JP;
Abstract
A hydraulic pump apparatus which is provided with a sleeve member sealingly accommodated in a housing, a cam member driven by a motor and slidably mounted in the sleeve member, a plunger abutting against the cam member, a plunger chamber housed in the sleeve member, a capacity of which varies in accordance with a slide movement of the plunger, a suction passage and an ejection passage formed in the housing, a fluid introducing passage communicating with the suction passage of the housing, a suction valve disposed between the fluid introducing passage and the plunger chamber, an ejection valve disposed between the plunger chamber and the ejection passage of the housing, a hollow engaging member for preventing the plunger from rotating with respect to the housing, the engaging member is disposed at a position bridging the suction passage of the housing and the fluid introducing passage of the sleeve member.