Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Gregory A. Phillips0
Juergen Wiker0
Date of Patent
September 11, 2007
Patent Application Number
10547642
Date Filed
March 11, 2003
Patent Citations Received
Patent Primary Examiner
Patent abstract
A spade drill bit (202) comprises a shaft (204) having one end (205) configured to be engaged to a driving tool and a cutting head (206) attached at an opposite end of said shaft (204). The cutting head (206) includes a center point (216) having threads (240) defined thereon, including continuous threads (247) adjacent the tip and discontinuous threads (242) thereafter toward the base.
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