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:
Jun. 12, 2012
Filed:
May. 23, 2005
Applicants:
Takashi Tsujimoto, Iwata, JP;
Rino Fukami, Iwata, JP;
Inventors:
Takashi Tsujimoto, Iwata, JP;
Rino Fukami, Iwata, JP;
Assignee:
NTN Corporation, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16C 19/00 (2006.01); F16C 33/34 (2006.01);
U.S. Cl.
CPC ...
Abstract
At least on a surface of a rolling element of a rolling bearing, innumerable minute concave recesses are randomly formed. An area percentage of the recesses on the surface having the recesses formed thereon is in a range from 5 to 20%, and a surface roughness parameter Rymax of the surface having the recesses formed thereon is in a range of 0.4 to 1.0.