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. 23, 2011
Filed:
Nov. 11, 2009
Kiyotake Shibata, Iwata, JP;
Masahiro Kiuchi, Osaka, JP;
Yoshiaki Kuchiki, Iwata, JP;
NTN Corporation, , JP;
Abstract
A vehicle wheel bearing apparatus has an outer member, an inner member with at least one inner ring, double row rolling elements, and a constant velocity universal joint torque transmittably inserted into a wheel hub and axially separably connected by a securing nut. A shoulder of an outer joint member of the constant velocity universal joint abuts against a larger end face of the inner ring. The larger end face of the inner ring is formed as a ground surface. An end face of the shoulder of the outer joint member abutted against the larger end face is formed as a ground surface or a lathe-turned surface. The surface roughness Ra of at least the larger end face of the inner ring is limited to a range within 0.1˜0.3.