Core drill

Details Core drill Core drill

1976-03-31

1977-09-13

Husar, Francis S.

Cutting by use of rotating axially moving tool

Tool having crystalline cutting edge

125 30R, 408209, B23B 2720, B28D 502

Patent

active

040478289

ABSTRACT:
Disclosed is a core drill for cutting cylindrical sections from stone, glass, shell and other hard materials, while simultaneously drilling a centered hole in each cylindrical section. The drill comprises an abrasive tipped hollow cylindrical core drill and a drill bit positioned centrally within the core barrel.

REFERENCES:
patent: 2599770 (1952-06-01), Marcerov
patent: 2978846 (1961-04-01), Barron
patent: 3127715 (1964-04-01), Christensen
patent: 3190278 (1965-06-01), Schluchter
patent: 3647310 (1972-03-01), Morse

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