Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
May 5, 2009
Patent Application Number
11549513
Date Filed
October 13, 2006
Patent Citations Received
Patent Primary Examiner
Patent abstract
A percussive drill bit has a working face opposite a shank end. The working face has a central jack insert and a plurality of peripheral inserts extending from the working face. The ends of the plurality of the peripheral inserts form an impacting plane. The central jack insert is disposed within a recessed portion of the working face and has an end extending between the working face and the impacting plane.
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