Roof bit

Details Roof bit Roof bit

1984-07-27

1985-01-08

Novosad, Stephen J.

Boring or penetrating the earth

Bit or bit element

Plural separable cutter elements

175418, E21B 1058

Patent

active

044922787

ABSTRACT:
A cutter bit wherein the dust collection openings are formed diametrically opposite each other, on an axis transverse to the longitudinal central axis of the bit body, and at least partly in the tapered dust control surfaces. The junctions of the heel surfaces and dust control surfaces define a pair of crown lines being parallel to one another and in planes which intersect the carbide insert in oblique fashion.

REFERENCES:
patent: 3089552 (1963-05-01), Black
patent: 3434553 (1969-03-01), Weller
patent: 3434554 (1969-03-01), Bower, Jr.
patent: 4313506 (1982-02-01), O'Connell

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