Roof drill bit

Details Roof drill bit Roof drill bit

1984-08-21

1985-05-07

Novosad, Stephen J.

Boring or penetrating the earth

Bit or bit element

Plural separable cutter elements

175418, E21B 1046

Patent

active

045152306

ABSTRACT:
A drill bit for use in mining, and in particular in rotative and percussion drilling action which includes a generally cylindrical body with a driving shank at one end and a transverse cutting insert at the other end. The body is hollow to conduct a suction force to the drilling area and side ports are formed in the body connected to the hollow center to draw in dust, chips and cuttings resulting from the drilling action. The shape and extent of the side ports is disclosed as 1/4 to 1/3 of the axial length of the body of the bit and circumferentially significantly increased with a shape which provides circumferential access to the ports as well as radial.

REFERENCES:
patent: 4190128 (1980-02-01), Emmerich
patent: 4313506 (1982-02-01), O'Connell
patent: 4330044 (1982-05-01), Orr et al.

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