Boring machine

Details Boring machine Boring machine

1998-06-11

2000-10-31

Tsay, Frank S.

Boring or penetrating the earth

Processes

Boring with specific fluid

175417, E21B 112

Patent

active

061387754

ABSTRACT:
In a percussion boring machine for producing or widening earth boreholes, the housing is equipped with nozzles and houses a striking piston caused to reciprocate axially by means of compressed air and means of generating pressure which supplies the nozzles with a flushing, cutting, lubricating and/or steering liquid. Since the liquid pressure required for the excavation of the ground surrounding the machine and/or for causing the machine to travel on a curved path is generated in the machine itself, the machine only needs to be supplied through a supply line with a liquid at a slightly raised pressure.

REFERENCES:
patent: 3865200 (1975-02-01), Schmidt
patent: 4290496 (1981-09-01), Briggs
patent: 4819745 (1989-04-01), Walter
patent: 5040621 (1991-08-01), Lof
patent: 5301758 (1994-04-01), Jenne
patent: 5332048 (1994-07-01), Underwood et al.
patent: 5435401 (1995-07-01), Hedlund et al.
patent: 5833017 (1998-11-01), Woods et al.

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