Cutting by use of rotating axially moving tool – Tool or tool with support – Including detailed shank
Patent
1987-05-06
1988-01-05
Spruill, Robert L.
Cutting by use of rotating axially moving tool
Tool or tool with support
Including detailed shank
279 1B, 279 75, B23B 5100
Patent
active
047172924
ABSTRACT:
A tool such as a drill has a cylindrical shank for insertion in a tool holder of a rotary percussive or other rotary machine, such as a drilling machine. The shank has a first surface extending transversely of the shank from a point of intersection with the periphery thereof and a second surface extending from the first surface at the end of the first surface remote from the point of intersection of the first surface with the periphery of the shank to a point of intersection with the periphery spaced from the point of intersection of the first surface with the periphery. There are two sets of first and second surfaces spaced apart on opposite sides of the longitudinal axis of the shank.
The first and second surfaces are flat. The second surfaces are radial and arranged on the same diameter. A plane through the longitudinal axis of the shank at substantially 90.degree. to the first flat surfaces (which are parallel) is intermediate their respective points of intersection with the periphery and the ends from which the respective second flat surfaces extend. Each first flat surface thus provides a large, flat bearing for cooperation with an elongate driving member (a spline or rib) of the tool holder. Each set of first and second surfaces may have a third surface such that the two sets of surfaces define diametrically opposed rib or spline receiving grooves having a flat base and convergent sides.
REFERENCES:
patent: 2652738 (1953-09-01), Carlson
patent: 3637225 (1972-01-01), Schmuck
patent: 3702705 (1972-11-01), Schadlich
patent: 3943986 (1976-03-01), Lejdegard
patent: 4107949 (1978-08-01), Wanner et al.
patent: 4209182 (1980-06-01), Sheldon
patent: 4502824 (1985-03-01), Dohse et al.
Dom Holdings PLC
Spruill Robert L.
Studebaker Donald R.
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