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Surface textures for earth boring bits
   
Document Number
US Patent 7559381
Issued Date
July 14, 2009
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Abstract
A texture pattern is applied to bearing surfaces of earth-boring bits, especially the bearings of earth boring bits of the roller cutter variety. The textured surface that may be applied to either or both sides of the thrust washer faces, bearing faces, inlays, or thrust shoulders, or a combination thereof.
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Number of Claims:
22
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Published
July 14, 2009
Application Number
11/760,892
Filed
June 11, 2007
US Classification
175/372   384/93
Int'l Classification
E21B   10/22   (20060101)  
Attorney/Law Firm
Parent Case
CROSS-REFERENCE TO RELATED APPLICATION This application claims priority to provisional application 60/812,539, filed Jun. 9, 2006.
USPTO Field of Search
175/371   175/372   384/93  
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