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:
Sep. 21, 2004
Filed:
Feb. 28, 2002
Kazuo Ojima, Hitachinaka, JP;
Noboru Baba, Hitachioota, JP;
Toshikatsu Akiyama, Higashiibaraki, JP;
Katsuhiro Komuro, Hitachi, JP;
Tetsuo Udagawa, Hitachinaka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A turbocharger for an internal combustion engine, in which a bearing having excellent abrasion resistance without generating a black corrosion product in a high-temperature oil environment is provided. As bearing materials of a turbocharger, a copper alloy material containing, as main components, Cu, Zn, Al, Mn, and Si is employed. The elongating direction of an Mn—Si compound crystallized in the alloy material is set to the axial direction of a rotary shaft with respect to a radial bearing and is set to the direction perpendicular to the rotary shaft with respect to a thrust bearing.