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. 02, 2016
Filed:
Jul. 26, 2007
Applicants:
Kikuo Maeda, Kuwana, JP;
Hisashi Ohtsuki, Iwata, JP;
Inventors:
Kikuo Maeda, Kuwana, JP;
Hisashi Ohtsuki, Iwata, JP;
Assignee:
NTN CORPORATION, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16C 13/00 (2006.01); F16C 19/38 (2006.01); B60B 27/00 (2006.01); F16C 33/64 (2006.01); F16C 35/063 (2006.01);
U.S. Cl.
CPC ...
F16C 19/386 (2013.01); B60B 27/001 (2013.01); F16C 33/64 (2013.01); F16C 35/063 (2013.01);
Abstract
A bearing apparatus for wheel with ensured high durability by including a part with improved fatigue strength in a non-hardened portion includes an outer member, an inner member, and a roller. The inner member includes a hub ring made of steel and having a wheel attachment flange formed. The hub ring has a hardened portion hardened to attain at least 50 HRC as a result of quench hardening and a non-hardened portion which is a portion other than the hardened portion. Compressive stress in a range from at least 50 MPa to at most 500 MPa remains in the surface of the non-hardened portion.