US Patent 7241049 Micropore engagement surfaces for earth boring bit

Patent 7241049 was granted and assigned to Baker Hughes on July, 2007 by the United States Patent and Trademark Office.

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Patent

Patent attributes

Current Assignee

Baker Hughes

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

7241049

Date of Patent

July 10, 2007

Patent Application Number

11003132

Date Filed

December 3, 2004

Patent Primary Examiner

‌

Lenard A. Footland

Patent abstract

An earth boring bit has sliding engaging surfaces between a cone assembly and a bearing pin. Micropores are formed in at least one of the engaging surfaces. Each of the micropores has a leading portion and a trailing portion. The leading portion is at a more gradual slope than the trailing portion. The micropores are located in a pattern of a greater density in a region of the engaging surfaces that operate at higher pressures than in other regions.

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