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:
Jul. 20, 2010
Filed:
Aug. 28, 2006
Applicant:
Hideki Akamatsu, Iwata, JP;
Inventor:
Hideki Akamatsu, Iwata, JP;
Assignee:
NTN Corporation, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16C 33/58 (2006.01); F16C 33/64 (2006.01); F16C 33/72 (2006.01);
U.S. Cl.
CPC ...
Abstract
A drawn cup needle roller bearing comprises a drawn cup having flanges formed by a bending process at both ends, rollers arranged along the inner diameter surface of the drawn cup, and a no-metal cored seal incorporated on the inner diameter side of the drawn cup. The drawn cup in which the rollers are incorporated is heat treated and the no-metal cored seal is elastically deformed and incorporated inside the drawn cup past the flange. Here, the roller has a nitrogen-enriched layer on its surface layer, and the nitrogen-enriched layer contains not less than 20% by volume of retained austenite.