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. 19, 2003
Filed:
Jun. 15, 2001
Takahiro Niwa, Nagoya, JP;
Eiji Kato, Nagoya, JP;
Nobutaka Hiramatsu, Nagoya, JP;
Takayuki Shibayama, Nagoya, JP;
Daido Metal Company Ltd., Nagoya, JP;
Abstract
Bush is fabricated by providing porous sintered metal layer of copper on the surface side of back metal layer of steel plate through copper plating layer and coating the inside and the surface of porous sintered metal layer with sliding material by impregnation. Sliding material comprises 1-25 vol.% of tetrafluoroethylene-perfluoroalkylvinyl ether copolymer resin, 1-25 vol.% of at least one member selected from the group consisting of oxybenzoylpolyester resin and polyimide resin and 0.1-10 vol.% of hard particles having a Mohs hardness of 4 or more and average particle sizes of 5 &mgr;m or less such as Al O and SiC, the balance being polytetrafluoroethylene resin (55 vol.% or more of the total siding material) as the main component. 0.5-25 vol.% of a solid lubricant such as graphite and MoS can be further contained in total together with the hard particles. The sliding material containing polytetrafluoroethylene resin as the main component has an improved fretting wear resistance particularly when used as a bearing material.