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

1982-12-29

1985-10-15

Leppink, James A.

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

405296, E21D 2300

Patent

active

045470987

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: 3902325 (1975-09-01), Sigoh
patent: 4020640 (1977-05-01), Sigoh

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