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. 13, 2002
Filed:
Jul. 20, 2000
Applicant:
Inventors:
Assignee:
NSK Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16C 3/356 ;
U.S. Cl.
CPC ...
F16C 3/356 ;
Abstract
In a steel cage for rolling bearing which is nitrided to form a compound layer on the surface thereof, when the thickness of a dense layer in the compound layer is predetermined to a range of from 3 &mgr;m to 20 &mgr;m, the abrasion can be inhibited, improving the abrasion resistance. Further, when a porous layer which acts as a lubricant reservoir is predetermined to a range of from 2 &mgr;m to 25 &mgr;m, the exhaustion of lubricant can be inhibited, improving the seizing resistance.