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:
Nov. 09, 1999
Filed:
Mar. 12, 1998
Hisaya Nakagawa, Nagano, JP;
Toru Nakanishi, Nagano, JP;
Michiaki Takizawa, Nagano, JP;
Takehiko Yazawa, Nagano, JP;
Kabushiki Kaisha Sankyo Seiki Seisakusho, Nagano, JP;
Abstract
A sintered oil-impregnated bearing 20 used in a bearing device 30 is made by molding a mixture of a composite fine particles (main material) and a solid lubricant previously added to the main material in a proportion of about one weight percent to about three weight percent, wherein the main material comprises composite fine particles composed of iron powders having surfaces coated with copper, and the solid lubricant comprises fine particles made of an inorganic compound such as molybdenum disulfide and having surfaces coated with copper, sintering the mold at a temperature in a range of 650.degree. C. to 700.degree. C. to form a sintered body 20b, and impregnating the sintered body 20b with lubricant oil. Since the sintered body 20b itself has lubricity, the sintered oil-impregnated bearing is free from abrasion or seizure even if oil is used up.