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:
Jul. 27, 2010
Filed:
Jan. 17, 2006
Teruo Shimizu, Tokyo, JP;
Tsuneo Maruyama, Niigata, JP;
Hideki Narisako, Kariya, JP;
Tadashi Hazama, Chita-gun, JP;
Teruo Shimizu, Tokyo, JP;
Tsuneo Maruyama, Niigata, JP;
Hideki Narisako, Kariya, JP;
Tadashi Hazama, Chita-gun, JP;
Denso Corporation, Aichi-ken, JP;
Diamet Corporation, Niigata-Ken, JP;
Abstract
A bearing for a motorized fuel pump is made of a Cu—Ni based sintered alloy, composed of: 21 to 35% by mass of Ni, 5 to 12% by mass of Sn, 3 to 7% by mass of C, 0.1 to 0.8% by mass of P, and the balance of Cu and inevitable impurities. A matrix of the bearing is formed with pores with a porosity of 8 to 18%, and the P component is predominantly included at the grain boundary, and free graphite is distributed along the insides of open pores that are open to the surface and extending into the bearing. In this bearing, a Sn rich alloy layer containing equal to or more than 50% by mass of Sn is formed on the insides of the open pores and near openings of the open pores.