Shield tunneling machine

Details Shield tunneling machine Shield tunneling machine

1982-06-14

1984-06-26

Pate, III, William F.

Mining or in situ disintegration of hard material

Hard material disintegrating machines

With mine roof-supporting means

198657, 299 56, 299 58, 299 87, E21D 908

Patent

active

044563051

ABSTRACT:
A shield tunneling machine having incorporated therein an earth removing apparatus which comprises a tubular casing having an earth inlet at one end and a closable earth outlet at the other end, and an earth transport conveyor rotatably provided within the casing and comprising a helically twisted strip. Unlike conventional earth removing apparatus which has a screw conveyor comprising a rotary shaft and a screw blade around the shaft, the apparatus can transport and discharge earth containing large solid fragments and therefore performs the desired function even when small in diameter, i.e. in shield diameter.

REFERENCES:
patent: 1530768 (1925-03-01), Hoag
patent: 2665796 (1954-01-01), Anderson
patent: 2821374 (1958-01-01), Gardner
patent: 2919121 (1959-12-01), Ruth
patent: 3158255 (1964-11-01), Schnyder
patent: 4159149 (1979-06-01), Gastaroli
patent: 4165129 (1979-08-01), Sugimoto
patent: 4171848 (1979-10-01), Ono

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