Cutting appliances for use in tunnel driving operations

Details Cutting appliances for use in tunnel driving operations Cutting appliances for use in tunnel driving operations

1983-08-01

1985-12-03

Leppink, James A.

Mining or in situ disintegration of hard material

Hard material disintegrating machines

With mine roof-supporting means

299 11, 299 17, 299 55, E21D 908

Patent

active

045562563

ABSTRACT:
In a tunnel driving apparatus, and particularly such apparatus where a work face is supported by fluid, a cutting appliance is employed which is composed of a swinging arm carrying a cutter head. The arm can range over the face to detach material therefrom with the cutter head. Means for driving the cutter head is accommodated entirely within the arm itself and a conduit or the like extends through the arm and serves optionally to remove debris by suction or to convey pressure fluid to the face to assist the cutter head.

REFERENCES:
patent: 1530768 (1925-03-01), Haag
patent: 3778107 (1973-12-01), Haspert
patent: 4121673 (1978-10-01), Cherrington
patent: 4298230 (1981-11-01), Krabbe
patent: 4368924 (1983-01-01), Nussbaumer
patent: 4456305 (1984-06-01), Yoshikawa

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