Cutting by use of rotating axially moving tool – Tool or tool with support – Having axial – core-receiving central portion
Patent
1988-03-18
1989-10-03
Arnold, Bruce Y.
Cutting by use of rotating axially moving tool
Tool or tool with support
Having axial, core-receiving central portion
408206, 408223, B23B 4102
Patent
active
048712876
ABSTRACT:
The annular cutter of the present invention has a body portion with a plurality of teeth circumferentially spaced about the lower end thereof and a plurality of flutes extending upwardly around the outer periphery of the body portion between the teeth. Each of the teeth has at least two circumferentially stepped cutting edges with the trailing edge being the outermost cutting edge. These two cutting edges are separated by a shoulder which in the preferred embodiment is defined by the bottom wall of the flute. This shoulder has a radial clearance adjacent the outermost cutting edge to accommodate the growth of the outermost chip cut by the outermost cutting edge to facilitate discharge of the chips through the flute.
REFERENCES:
patent: Re28416 (1975-05-01), Hougen
patent: 3765789 (1973-10-01), Hoegen
patent: 4693644 (1987-09-01), Takahashi
Arnold Bruce Y.
Gossett Dykema
Ryan J. P.
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