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:
Dec. 25, 2007
Filed:
Aug. 15, 2005
Hiroto Suma, Shizuoka-ken, JP;
Hiroto Suma, Shizuoka-ken, JP;
NTN Corporation, , JP;
Abstract
A vehicle wheel bearing apparatus which improves the surface run-out of the wheel mounting flange to limit the generation of brake judder and also to increase the strength of the flange has a double row rolling bearing to rotatably support a wheel relative to a body of a vehicle. Double row rolling elements are between an inner member and an outer member. The inner member includes a wheel mounting flange, to secure the wheel via a brake rotor, and a cylindrical brake pilot portion, which extends from the wheel mounting flange to support the brake rotor. A plurality of hub bolts is press-fit into the wheel mounting flange along its circumference. The wheel mounting flange includes an annular recess portion recessed from the side surface of an outboard side at a base of the wheel mounting flange. The annular recess portion includes a corner region crossing the brake pilot portion which is formed with a predetermined hardened layer by high frequency induction quenching. The side surface is cut after the hub bolts are press fit into the wheel mounting flange.