Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Kevin Martin0
Date of Patent
September 14, 2010
0Patent Application Number
113835180
Date Filed
May 16, 2006
0Patent Primary Examiner
Patent abstract
An end face seal having two thin, opposed faces of a composite PDC/tungsten carbide or like material for example of a thickness of from about 2 to 5 mm to about 10 to 15 mm, brazed or adhesively adhered by an epoxy resin to a substrate of tungsten carbide or silicon carbide/nitride formed in a ring shape. Thereafter, the PDC layer is finish lapped to a flatness of about 1 to about 10 helium lightbands, with a rough lapping to 3 or 4 helium lightbands, and a finish lapping of about 1 helium lightband.
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