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:
Mar. 11, 2003
Filed:
May. 25, 2001
Applicant:
Inventors:
Hisashi Kawamura, Kanagawa, JP;
Yukio Ohura, Kanagawa, JP;
Manabu Ohori, Kanagawa, JP;
Susumu Tanaka, Kanagawa, JP;
Assignee:
NSK Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16C 3/362 ;
U.S. Cl.
CPC ...
F16C 3/362 ;
Abstract
A fine nitride layer comprising a compound layer and a diffusion hardened layer of hardness being Hv900 or higher is formed, through a low temperature nitriding method at temperature in the range of 300 to 400° C., in a guiding part. The guiding part guides the circumferential surfaces of retainers to and is formed at any one part of inner ring raceways to and outer ring raceways to as well as the inner circumferential surfaces of the outer rings to , to thereby realize such rolling bearings at low cost, having excellent abrasion resistance, and good corrosion resistance, if needed.