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. 04, 2003
Filed:
Jul. 05, 2001
Junya Ooitsu, Kashiwara, JP;
Koyo Seiko Co., Ltd., Osaka, JP;
Abstract
A retainer for rolling bearings is made from a phenol resin in which graphite and cotton fabric chips are mixed, and an inner circumferential surface and side surfaces other than inner circumferential surfaces of the pockets of the retainer are made of a skin layer. Therefore, the strength can be ensured with this skin layer, while the skin layer is absent in the inner circumferential surfaces of the pockets serving as sliding surfaces, allowing the graphite and the cotton fabric chips to be exposed, so that the lubricating performance can be ensured. Thus, a retainer for rolling bearings, as well as a manufacturing method therefor, which allows lubricating performance and strength to be ensured at the same time can be provided.