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:
Feb. 02, 2021
Filed:
May. 03, 2019
Ntn Corporation, Osaka, JP;
Yoshinori Ito, Aichi, JP;
Tomonori Yamashita, Aichi, JP;
NTN CORPORATION, Osaka, JP;
Abstract
A sintered bearing () contains as main components iron, copper, a metal having a lower melting point than copper, and a solid lubricant. The sintered bearing () includes a surface layer (S) and a base part (S). The surface layer (S) is formed mainly of flat copper powder arranged so as to be thinned in a thickness direction. In the base part (S), an iron structure () and a copper structure () brought into contact with the iron structure are formed of partially diffusion-alloyed powder in which copper powder is partially diffused in iron powder. Thus, a sintered bearing which achieves a balance between wear resistance of a bearing surface and strength of the bearing, and realizes low cost can be provided.