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:
Sep. 12, 2017
Filed:
Nov. 19, 2012
Ntn Corporation, Osaka-shi, JP;
Kazuo Komori, Iwata, JP;
NTN Corporation, Osaka-shi, JP;
Abstract
A wheel bearing apparatus has a double row angular contact ball bearing. A height of a shoulder of a shoulder portion () of an outer member () with respect to a ball diameter of a double ball () row is set in a range of 0.35 to 0.50 mm. A corner () of the shoulder portion () has a relief surface () and a chamfered portion (). The relief surface is on a straight line that is on a tangent line of an outer raceway surface (). The chamfered portion () is round in a circular arc with a predetermined radius of curvature r. The corner () is formed simultaneously by a formed grinding wheel forming the double row outer raceway surface (). The corner is formed smoothly continuous from each outer raceway surface (). A length in the radial direction of the relief surface () is set greater than or equal to 0.2 mm.