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. 09, 1990
Filed:
Aug. 08, 1988
Toshifumi Maehara, Hanazono, JP;
Akebono Brake Industry Co., Ltd., Tokyo, JP;
Akebono Research, Development Centre Ltd., Tokyo, JP;
Abstract
A hydraulic pump is disclosed, characterized in that, in the hydraulic pump including a cylinder body having a cylinder chamber, a suction port and an ejection port, a cam member and a reciprocatingly movable member are provided, wherein oil in said cylinder chamber is ejected when said movable member is pushed into said cylinder chamber by the cam member, a cylindrical piston is slidably fitted into said cylinder chamber, so that the movable member is engaged with the cylindrical piston when it is pushed into the cylinder chamber so shut off communication between the cylinder chamber and the suction port and a valve provided in the ejection passage communicating to said ejection port is opened due to the pressure rise when said movable member is further pushed into said cylinder chamber to eject the oil in the cylinder chamber outwardly.