Cutting by use of rotating axially moving tool – Tool or tool with support – Having peripherally spaced cutting edges
Reexamination Certificate
2007-07-03
2007-07-03
Howell, Daniel W. (Department: 3722)
Cutting by use of rotating axially moving tool
Tool or tool with support
Having peripherally spaced cutting edges
C408S227000
Reexamination Certificate
active
10914111
ABSTRACT:
A metal cutting drill bit has a shank portion, a flute portion defining a helix angle and a tip. The tip has a primary cutting edge extending to an outer periphery of the drill bit. The primary cutting edge has a rake face defining a rake angle. The rake angle is different from the helix angle at the tip of the drill bit.
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Anjanappa Muniswamappa
Crosby Stephen R.
Rescigno Gerald
Thomas Rickey J
Timmons Russell M
Black & Decker Inc.
Harness & Dickey & Pierce P.L.C.
Howell Daniel W.
University of Maryland
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