Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
May 10, 2016
Patent Application Number
14462935
Date Filed
August 19, 2014
Patent Citations Received
Patent Primary Examiner
Patent abstract
An elongated drill bit has a shank at one end and working end at the other. A flute portion is between the working end and the shank. The flute portion is continuous with the shank and working end and is generally unitarily formed with them. The flute portion has at least one flute with a helix angle between approximately 30° and 35°. The working end has a pilot tip with a cutting portion. A tapered web is formed in the flute portion, a thickness of the web at the tip of the working end is about 9% to 15% of the nominal diameter.
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