Drill

Details Drill Drill

1987-08-28

1989-08-08

Bishop, Steven C.

Cutting by use of rotating axially moving tool

With means to apply transient, fluent medium to work or product

Including tool with duct

175329, 175404, 279 99, 408 57, 408144, 408145, 408204, 408226, B23B 5104, B23B 5106

Patent

active

048547883

ABSTRACT:
A drill comprising a drill shank having a taper portion adjacent to a threaded portion provided on the rear or basal portion of the shank. When the drill is screwed into an axial hole in a drill holder of a drilling machine, the opening edge or inner tapered wall of the axial hole of the drill holder bites into the taper portion of the drill shank, consequently to bring the drill into firm connection with the drill holder of the drilling machine.

REFERENCES:
patent: 1156336 (1915-10-01), Wegland
patent: 1979325 (1934-11-01), Goldberg
patent: 2264440 (1941-12-01), Havlick
patent: 2558415 (1951-06-01), Bonsall
patent: 2731236 (1956-01-01), Bruce
patent: 2870993 (1959-01-01), Jahnke
patent: 2998088 (1961-08-01), Pennington, II
patent: 3318400 (1967-05-01), Hildebrandt
patent: 3421392 (1969-01-01), Bangerter et al.
patent: 3833077 (1974-09-01), Lavallee
patent: 3884120 (1975-05-01), Diferdinando
Tool and Manufacturing Engineers Handbook, 4th Ed., vol. 1, Drozda et al, eds. (Society of Manufacturing Engineers; Dearborn, MI, 1983), pp. 9-27.

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