Shifting device connected with a longwall conveyor for a progres

Details Shifting device connected with a longwall conveyor for a progres Shifting device connected with a longwall conveyor for a progres

1978-01-12

1979-04-03

Stein, Mervin

Hydraulic and earth engineering

Miscellaneous

405291, E21D 2300

Patent

active

041474597

ABSTRACT:
A timbering device connected to a longwall conveyor disposed toward the mining face of an excavation for progressively timbering frames from the gobbing side toward the mining face side comprises first and second skids which are adapted to be shifted over the floor. The guide piece is pivoted to one of the skids adjacent the gobbing side thereof and it has a guide slot extending toward the mining face. A push rod has one end connected to the longwall conveyor and an opposite end having a slide portion which is slidable in the guide piece guide slot. A thrust drive piston has a gobbing side end pivotally connected to the slide piece portion of the push rods and has an opposite mounting face end which is pivotally connected to a bracket carried under one of said skids. The sliding plane control device is carried by the pusher rod.

REFERENCES:
patent: 3952525 (1976-04-01), Walker et al.

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