Ram boring machine

Details Ram boring machine Ram boring machine

1988-07-22

1990-07-03

Dang, Hoang C.

Boring or penetrating the earth

Boring without earth removal

173 91, 173133, 175 73, 175 74, 175 92, 175296, E21B 414, E21B 708

Patent

active

049382977

ABSTRACT:
A pressure-medium driven ram boring machine for boring in the earth, having an impact tip acted on by a percussion piston reciprocating in the machine housing, wherein the impact tip is arranged to be radially adjustable in the housing whereby controlled directional changes of the machine can be effected.

REFERENCES:
patent: 3667556 (1972-06-01), Henderson
patent: 3677354 (1972-07-01), Kostylev et al.
patent: 4319649 (1982-03-01), Jeter
patent: 4396073 (1983-08-01), Reichman et al.
patent: 4655299 (1987-04-01), Schoeffler

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