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. 10, 2004
Filed:
Dec. 21, 2001
Applicant:
Inventors:
Masahiro Ozawa, Shizuoka-ken, JP;
Koji Sahashi, Shizuoka-ken, JP;
Kazuhiko Hozumi, Shizuoka-ken, JP;
Keisuke Sone, Shizuoka-ken, JP;
Mitsuru Umekida, Shizuoka-ken, JP;
Assignee:
NTN Corporation, Osaka-fu, JP;
Primary Examiner:
Int. Cl.
CPC ...
F16C 1/300 ;
U.S. Cl.
CPC ...
F16C 1/300 ;
Abstract
A wheel bearing device is provided to prevent loosening of a hub ring and an outer joint ring that are fitted together. An irregular portion treated with hardening is formed on a fit face of the hub ring on an inside periphery of which the outer joint member is fitted. A low hardness portion of the outer joint member formed with hardness lower than that of the irregular portion is expanded in diameter to make it bite into the irregular portion. In this way the hub ring and the outer joint ring are unitized together.