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. 16, 2011
Filed:
Sep. 08, 2008
Toshiyuki Saito, Toyoake, JP;
Takumi Mio, Kariya, JP;
Masahiro Suzuki, Kashiba, JP;
Tomoyoshi Konishi, Hiratsuka, JP;
Arata Suda, Yokohama, JP;
Mikito Toyoshima, Hiratsuka, JP;
Toshiyuki Saito, Toyoake, JP;
Takumi Mio, Kariya, JP;
Masahiro Suzuki, Kashiba, JP;
Tomoyoshi Konishi, Hiratsuka, JP;
Arata Suda, Yokohama, JP;
Mikito Toyoshima, Hiratsuka, JP;
JTEKT Corporation, Osaka-shi, JP;
Nihon Parkerizing Co., Ltd., Tokyo, JP;
Abstract
An oil pump has: a base part having a working chamber; and a rotor provided rotatably in the working chamber. The base part is configured by a plurality of split bodies. At least one of the plurality of split bodies is made of aluminum alloy, and on which an opposed sliding surface made of a ceramic film is formed. The ceramic film of the opposed sliding surface has a hardness of approximately Hv 500 to 1100 and a surface roughness of approximately 2 to 8 micrometers, and contains α-alumina and zirconia.