Spade bit
Number of patents in Portfolio can not be more than 2000
United States of America
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Sep 14, 2010
Issued Date -
N/A
app pub date -
Jun 17, 2008
filing date -
Jun 17, 2008
priority date (Note) -
Withdrawn
status (Latency Note)
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Abstract
The drill bit comprises a cutting blade formed at one end of a shank. The cutting blade has a pair of cutting shoulders that extend inwardly from the outer sides of the blade toward the bit axis. A tip having converging sides that create a point extends from the shoulders. The cutting edge of each shoulder is beveled with respect to the plane of the face of the blade. A flute is provided on the leading portion of each blade face adjacent the cutting edges. Each flute is a smooth curve that creates a substantially uninterrupted recess on each face of the blade that facilitates chip removal, increases the drill rate and lowers the power required to drill a hole. A non-stick coating may be applied to the blade to further facilitate chip removal.
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