Cutting by use of rotating axially moving tool – Tool or tool with support – Having peripherally spaced cutting edges
Patent
1997-01-08
1998-03-10
Pitts, Andrea L.
Cutting by use of rotating axially moving tool
Tool or tool with support
Having peripherally spaced cutting edges
407 54, B23B 5100
Patent
active
057253382
ABSTRACT:
The cutting end or head of a helically grooved drill bit is of generally hemispherical shape and has four cutting lips, two of which are disposed in end-to-end relationship at the point S of the bit. The cutting angle of the edge of each lip is evolutive, varying from 0.degree. at the point S to a value, determined experimentally in accordance with the material to be machined, at a position P at the intersection of the cutting edge with the end of the outer diameter d of the bit.
REFERENCES:
patent: 3409965 (1968-11-01), Fisher
patent: 3977807 (1976-08-01), Siddall
patent: 4285618 (1981-08-01), Shanley, Jr.
patent: 4712948 (1987-12-01), Kidani
patent: 4932815 (1990-06-01), Krauss
patent: 5186584 (1993-02-01), Muller et al.
patent: 5193943 (1993-03-01), Kim
DE-U-18 63 075 Gebr. Brasseler, p. 3 line 8, p. 4 line 4, figures 1, 2.
Cabaret Maurice Jean
Daude Christian Thierry
Lavocat Daniel Marcel Eugene
Leboulanger Jean Pierre
Lebrun Michel
Pitts Andrea L.
Societe Nationale D'Etude Et De Construction De Moteurs D'Aviati
Tsai Henry W. H.
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