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:
Jun. 09, 1992
Filed:
Oct. 23, 1990
Hisaya Nakagawa, Komagane, JP;
Toru Nakanishi, Komagane, JP;
Sankyo Seiki Mfg. Co., Ltd., Nagano, JP;
Abstract
A sintered oil-impregnated bearing is disclosed having a plurality of evenly extending smoothed areas on the inner periphery surface for receiving a rotary shaft, the smoothed areas having a constant angular width of 10.degree. to 90.degree., the remaining surface areas between any adjoining two of said smoothed areas being kept porous. Such a sintered oil-impregnated bearing can be realized without the process of aging and ensures a good oil circulation on the smoothed surface areas, a high precision assembling operation because of the exactly circular and concentric configuration of the inner and outer peripheries and an easy and accurate alignment of the smoothed surface areas and the corresponding contact areas of the rotary shaft. Therefore, a sintered oil-impregnated bearing according to the invention is free from any metallurgical damage and can be manufactured in an existing manufacturing facility without significantly modifying the manufacturing equipment.