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:
Oct. 05, 2021
Filed:
Mar. 02, 2018
Applicant:
Ntn Corporation, Osaka, JP;
Inventors:
Masahiro Yamada, Kuwana, JP;
Chikara Ohki, Kuwana, JP;
Assignee:
NTN CORPORATION, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16C 33/62 (2006.01); F16C 19/06 (2006.01);
U.S. Cl.
CPC ...
F16C 33/62 (2013.01); F16C 19/06 (2013.01); F16C 2204/70 (2013.01);
Abstract
A bearing part is composed of a chromium molybdenum steel, and includes a raceway surface or a rolling contact surface. A precipitated compound composed of at least one of a carbide, a nitride, and a carbonitride exist in the raceway surface or the rolling contact surface. An area ratio of the precipitated compound in the raceway surface or the rolling contact surface is more than or equal to 3%. An average grain size of the precipitated compound in the raceway surface or the rolling contact surface is less than or equal to 0.3 μm.