Cutting by use of rotating axially moving tool – Tool or tool with support – Having peripherally spaced cutting edges
Reexamination Certificate
2006-03-14
2006-03-14
Howell, Daniel W. (Department: 3722)
Cutting by use of rotating axially moving tool
Tool or tool with support
Having peripherally spaced cutting edges
C408S233000, C408S713000
Reexamination Certificate
active
07011478
ABSTRACT:
A spade drill insert and drilling tool assembly is provided wherein the lands of the spade drill insert have helical margins which provide increased stability during cutting operations. The margin may have a helical trailing side or leading side, a parallel helical margin, or may also include a gullet or flute adjacent the helical margin.
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Tool and Manufacturing Engineers Handbook, Fourth Edition, vol. I, Machining, Society of Manufacturing Engineers, 1983, Chapter 9, pp. 14-15.
Fiegl Greg
Mast Wendell E.
Nuzzi Joseph P.
Stokey Timothy G.
Allied Machine & Engineering Corp.
Clark Robert J.
Hahn Loeser & Parks LLP
Howell Daniel W.
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