Coal-mining machine

Details Coal-mining machine Coal-mining machine

1981-12-23

1984-05-29

Leppink, James A.

Mining or in situ disintegration of hard material

Hard material disintegrating machines

Sidewall-working

299 81, E21C 3522

Patent

active

044510896

ABSTRACT:
An excavating machine, e.g. for the recovery of coal and its removal from a coal seam comprises a rotary excavating tool which consists of a plurality of neutrally articulated coal augers which are driven and are disposed against the face to be excavated. The coal augers are provided with nozzles for spraying water or some other fast settling and spark-inhibiting liquid, the nozzles being controlled by a valve which opens flow to the nozzles only when at least one auger is disaligned from an adjustive auger as is required for coal cutting operations with such tools.

REFERENCES:
patent: 2690807 (1954-10-01), Moosman
patent: 3071193 (1963-01-01), Raulins
patent: 3747982 (1973-07-01), Agnew et al.
patent: 3887235 (1975-06-01), Koppers
patent: 4049318 (1977-09-01), Fruin
patent: 4068893 (1978-01-01), Weirich
patent: 4095845 (1978-06-01), Paurat
patent: 4118072 (1978-10-01), Kelley et al.
patent: 4274434 (1981-06-01), Hafele

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