Rock drill

Details Rock drill Rock drill

1984-03-21

1986-02-25

Novosad, Stephen J.

Boring or penetrating the earth

Bit or bit element

Plural separable cutter elements

175417, E21B 1056

Patent

active

045723079

ABSTRACT:
A rock drill for percussion drilling comprises frontal and gauge button inserts, said frontal button inserts being parallel with the longitudinal axis of the rock drill and said gauge button inserts being inclined at an angle relative to said longitudinal axis and arranged to define the diameter of the hole drilled by the rock drill. The number of the frontal button inserts is two and the number of gauge button inserts is two.

REFERENCES:
patent: 2689109 (1954-09-01), Curtis
patent: 2725216 (1955-11-01), Brown
patent: 3997011 (1976-12-01), Staroba
patent: 4296825 (1981-10-01), Larsson
patent: 4304312 (1981-12-01), Larsson

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