Two-prong rotary bit, especially for use with roof drills, and i

Details Two-prong rotary bit, especially for use with roof drills, and i Two-prong rotary bit, especially for use with roof drills, and i

1985-04-03

1985-11-05

Novosad, Stephen J.

Boring or penetrating the earth

Bit or bit element

Plural separable cutter elements

175392, E21B 1054

Patent

active

045507910

ABSTRACT:
Disclosed according to the present invention is a two-prong rotary drill bit, especially for use with roof drills. The two-prong bit has a supporting body having an axis of rotation. The two-prong bit has a pair of inserts, one insert on each of the prongs. Each of the inserts has a cutting portion facing in the direction of rotation and a mounting portion. When viewed in a direction parallel to the axis of rotation, each of the inserts will have a cross sectional configuration which is generally wedge-shaped. Also disclosed are wedge-shaped inserts especially for use with roof drill bits.

REFERENCES:
patent: 2650071 (1953-08-01), Rassieur
patent: 4373593 (1983-02-01), Phaal et al.

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