Tool bit
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United States of America Patent
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-
Aug 26, 2003
Grant Date -
Oct 3, 2002
app pub date -
Apr 3, 2001
filing date -
Apr 3, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A drill bit has a chuck engaging shank portion having a geometric cross-sectional shape; a plurality of projections formed on at least a part of at least one of said surfaces; said projections (a) varying in height across said surface, and (b) engaging an inner surface of a chuck to prevent slippage of said bit in said chuck.
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