Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Douglas W. Allen0
Date of Patent
June 13, 2017
Patent Application Number
13945481
Date Filed
July 18, 2013
Patent Citations Received
Patent Primary Examiner
Patent abstract
A power tool accessory includes a shank member having a first hardness. A conically-shaped body is coupled to the shank member and includes a series of stepped shoulders that increase in diameter from a tip portion to a base portion. A flute extends substantially from the tip portion to the base portion, with cutting edges defined at the intersection of the flute and the shoulders. The body has a second hardness greater than the first hardness.
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