Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Patent
1987-02-09
1988-08-09
Novosad, Stephen J.
Boring or penetrating the earth
Bit or bit element
Rolling cutter bit or rolling cutter bit element
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.
Dang Hoang C.
Novosad Stephen J.
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