Drill bit

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element

Patent

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Details

175376, 175378, 175414, E21B 1010, E21B 1016, E21B 1036

Patent

active

047621885

ABSTRACT:
A drill bit for use with a reciprocating device, wherein the bit is in the form of a rotatable corrugated frusto-conical roller, supported by a U-shaped member, attached to a mounting post. The corrugations are the cutting edges of the bit.

REFERENCES:
patent: 223230 (1880-01-01), Jenkins
patent: 1868348 (1932-07-01), De Costa
patent: 4167980 (1979-09-01), Saxman
patent: 4682819 (1987-07-01), Masse
TRW Distributors Catalogue (undated),--p. 13 and another unnumbered page.

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