US Patent 7287909 Wheel supporting rolling bearing unit

Patent 7287909 was granted and assigned to NSK Ltd. on October, 2007 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

NSK Ltd.

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

7287909

Date of Patent

October 30, 2007

Patent Application Number

10526548

Date Filed

August 29, 2003

Patent Primary Examiner

‌

Lenard A. Footland

Patent abstract

In a wheel supporting rolling bearing unit, an inner end opening out of both end openings of a space in which balls 14, 14 are provided is sealed with a cap 17a. An outer end opening is sealed with a seal ring 16c having three seal lips. A rolling resistance that changes based on a preload is regulated in a range of 0.15 to 0.45 N·m, and a running resistance of the seal ring 16c based on a friction between the seal ring and a counter surface is regulated in a range of 0.03 to 0.2 N·m.