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:
Apr. 08, 2008
Filed:
Jun. 11, 2003
Kentaro Yamauchi, Aichi-ken, JP;
Satoshi Kondo, Aichi-ken, JP;
Nobuyuki Kawabata, Aichi-ken, JP;
Takashi Imanishi, Aichi-ken, JP;
Hiromichi Suemoto, Tokyo, JP;
Kentaro Yamauchi, Aichi-ken, JP;
Satoshi Kondo, Aichi-ken, JP;
Nobuyuki Kawabata, Aichi-ken, JP;
Takashi Imanishi, Aichi-ken, JP;
Hiromichi Suemoto, Tokyo, JP;
Toyoda Koki Kabushiki Kaisha, Kariya-shi, JP;
JTEKT Corporation, Osaka, JP;
Abstract
An oil pump includes: a rotorfor actuating a pump action to suck oil in a suction passagefrom a suction portto supply oil to a delivery passage by way of a delivery portand a flow control valve for returning an excessive oil from the delivery passage to the suction passageas a returning flow of oil by way of a bypass passagewhen a flow amount of oil is excessive in the delivery passage. A corrosion-proof memberhaving corrosion resistance is disposed at the position which faces to the returning flow of oil in the inner wall surface of at least one of the suction passageand the bypass passageThe corrosion-proof memberhas a discontinuous shape (for example a V-shape or a U-shape) in a circumferrencial direction of center line Pin a cross section which intersects the center line Pat right angles.