Cutting by use of rotating axially moving tool – With means to apply transient – fluent medium to work or product – Including tool with duct
Patent
1980-06-26
1983-07-26
Bilinsky, Z. R.
Cutting by use of rotating axially moving tool
With means to apply transient, fluent medium to work or product
Including tool with duct
408144, 408211, 408705, B23B 5106
Patent
active
043951694
ABSTRACT:
A drill bit comprises a body of a cylindrical shape having a straight groove of a generally V-shape formed in the circumferential surface thereof and extending along the longitudinal axis thereof. The bit body has a drilling fluid passageway extending longitudinally therethrough. One of the two side faces defining the longitudinal groove has a radially inwardly-disposed convex surface of a semi-cylindrical shape and a flat surface extending radially outwardly from the semi-cylindrical surface of the periphery of the cylindrical bit body. The semi-cylindrical surface terminates at its forward end in an arcuate inward cutting edge while the flat surface terminates at its forward end in a straight outward cutting edge. The arcuate inward cutting edge is offset from the straight outward cutting edge when viewed from the forward end of the bit body.
REFERENCES:
patent: 1513350 (1924-10-01), Stolle
patent: 1661017 (1928-02-01), Stolle
patent: 2188928 (1940-02-01), Stolle
patent: 2325535 (1943-07-01), Nordberg
patent: 2847885 (1958-08-01), Wagner
patent: 3304815 (1967-02-01), Faber
patent: 3572183 (1971-03-01), Mellone
Kashiwagi Takashi
Kasutani Hiroshi
Bilinsky Z. R.
Mitsubishi Kinzoku Kabushiki Kaisha
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