US Patent 7909517 Wheel support bearing assembly and manufacturing method thereof

Patent 7909517 was granted and assigned to NTN Corporation on March, 2011 by the United States Patent and Trademark Office.

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Patent

Patent attributes

Current Assignee

NTN Corporation

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

7909517

Date of Patent

March 22, 2011

Patent Application Number

12068866

Date Filed

February 12, 2008

Patent Primary Examiner

‌

Thomas R. Hannon

Patent abstract

A wheel support bearing assembly with a hub axle of enhanced strength and a durability under a rotational bending condition as well as weight reduction, and without changing a shape and a dimension of a wheel mounting flange nor deteriorating a surface runout, and a manufacturing method thereof. A surface hardness is set to 20 HRC or more and than 35 HRC or less by applying an air cooling or a thermal refinement after hot forging a raw material of the hub axle, and a shot peening treatment is applied to an inner diameter portion of the hub axle.

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