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:
Apr. 27, 2010
Filed:
Mar. 03, 2006
Applicants:
Yasuyuki Watanabe, Iwata, JP;
Naoki Shibamoto, Iwata, JP;
Akihiko Katayama, Iwata, JP;
Inventors:
Assignee:
NTN Corporation, Osaka-Fu, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16C 33/34 (2006.01); F16C 33/62 (2006.01);
U.S. Cl.
CPC ...
Abstract
A rolling bearing comprises a roller, a roller shaft provided inwardly of the roller, and rolling elements provided between the roller and the roller shaft, the roller shaft having a nitrogen-rich layer and is configured such that its race surface, on which the rolling elements run, has not smaller than 11 in the JIS austenite grain size number and not smaller than HV653 in the Vickers hardness number, at both ends not greater than HV300, and at its core beneath a widthwise midpoint of the race surface not smaller than HV550.