Process and tool for boring cavity holes, more especially in con

Details Process and tool for boring cavity holes, more especially in con Process and tool for boring cavity holes, more especially in con

1985-06-14

1987-02-03

Novosad, Stephen J.

Boring or penetrating the earth

Processes

Boring curved or redirected bores

175 73, 175273, E21B 1032

Patent

active

046403710

ABSTRACT:
A tool for boring cavity holes in concrete walls and the like comprises a cutting blade pivotally mounted about a transverse pin at the end of an elongate body and having a camming profiled portion. A ball is placed at the bottom of the hole which has first been bored with a conventional drill and the tool cutting blade is brought into contact with the ball while causing rapid rotation of the tool body and exerting an axial pressure. The ball cooperates with the blade camming profiled portion so as progressively to orient the blade in a transverse direction.

REFERENCES:
patent: 2193721 (1940-03-01), Gunderson
patent: 2593035 (1952-04-01), Karbowski
patent: 3960222 (1976-06-01), Leibee et al.

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