Boring or penetrating the earth – Bit or bit element – Core forming type
Patent
1991-08-26
1992-08-11
Novosad, Stephen J.
Boring or penetrating the earth
Bit or bit element
Core forming type
51206P, 175434, 407 54, 408 27, 408 59, 4082035, B23B 2720, E21B 1002, E21B 1060
Patent
active
051370980
ABSTRACT:
A diamond tool for combination drilling and routing. The tool has a shaft end and a cutting end with an aperture therein. The cutting end includes abrasive grit on the outer peripheral surface for routing purposes and has abrasive grit on the terminal end and the surfaces forming the aperture for drilling purposes.
REFERENCES:
patent: 2182562 (1939-12-01), Koebel
patent: 2996061 (1961-08-01), Miller
patent: 3243924 (1966-04-01), Peters
patent: 3495359 (1970-02-01), Smith et al.
patent: 4274769 (1981-06-01), Multakh
patent: 4757645 (1988-07-01), Ozer et al.
patent: 4776862 (1988-10-01), Wiand
patent: 4854788 (1989-08-01), Okinaga
Inland Diamond Products Company
Novosad Stephen J.
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