Cutting by use of rotating axially moving tool – Tool or tool with support – Having stepped cutting edges
Reexamination Certificate
2006-12-12
2006-12-12
Howell, Daniel W. (Department: 3722)
Cutting by use of rotating axially moving tool
Tool or tool with support
Having stepped cutting edges
C408S227000, C408S233000, C408S713000
Reexamination Certificate
active
07147414
ABSTRACT:
A cutting tool insert having a specialized spur point geometry at the center of the insert. The insert comprises a spur point cutting portion and a blade cutting portion wherein the spur point provides stability by providing a spot and allowing a flexible workpiece to partially spring back when the spur breaks through. The spur point insert facilitates the cutting of relatively thinner workpieces and workpieces requiring the tool to have a longer reach to the hole, while minimizing the burr resulting from the drilling operation.
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Keim Brian
Mast Wendell E.
Allied Machine & Engineering Corp.
Clark Robert J.
Hahn Loeser & Parks LLP
Howell Daniel W.
Talbot Michael W.
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