Cutting by use of rotating axially moving tool – Processes – Bit detachable
Reexamination Certificate
2005-05-02
2008-08-26
Howell, Daniel W (Department: 3726)
Cutting by use of rotating axially moving tool
Processes
Bit detachable
C408S213000, C408S214000
Reexamination Certificate
active
07416371
ABSTRACT:
A wood boring bit for boring holes in wood and other similar work surfaces having a central longitudinal axis, a main body, a pilot screw tip and a partial flute with a cutting edge and a cutting spur. The flute portion may be defined by a partial helical section having a distal end joined to the main body and a lead edge disposed toward said screw tip. The distal end and the lead edge preferably do not overlap along the central axis and are equal to or less than 360° from one another around the axis. The partial flute provides improved waste removal and allows the user to access the cutting edge of the flute for maintenance purposes.
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Scott Gary F.
Trettin David Jackson
Howell Daniel W
Irwin Industrial Tool Company
Moore & Van Allen PLLC
Williamson Dennis J.
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