Mining equipment, mainly for extraction of heavy beds

Details Mining equipment, mainly for extraction of heavy beds Mining equipment, mainly for extraction of heavy beds

1981-05-04

1983-06-07

Byers, Jr., Nile C.

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

405296, E21D 2300

Patent

active

043868789

ABSTRACT:
A mine excavator especially for heavy coal beds comprises a base on which the power loader and conveyor are provided and on which the roof support or shield is pivotally mounted. According to the invention, a back member connected to the roof plate and spaced above the base has a downwardly and forwardly swingable door which deposits caved material onto the conveyor at a forward portion of the main base.

REFERENCES:
patent: 3399927 (1968-09-01), Groetschel
patent: 3902325 (1975-09-01), Sigott
patent: 3949563 (1976-04-01), Wertelewski
patent: 4020640 (1977-05-01), Sigott
patent: 4155675 (1979-05-01), Friedrichs
patent: 4191497 (1980-03-01), Poklekowski
patent: 4269546 (1981-05-01), Saunders

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