Control apparatus for inclination of longwall guide

Details Control apparatus for inclination of longwall guide Control apparatus for inclination of longwall guide

1981-12-11

1984-07-31

Purser, Ernest R.

Mining or in situ disintegration of hard material

Hard material disintegrating machines

Stepper-type advance-causing means

299 43, 405295, E21C 3508, E21D 2304

Patent

active

044626371

ABSTRACT:
Apparatus for controlling the cutting horizon of a mineral winning plough comprises means for pivoting the guide along which the plough moves. The guide is fixed to the face side of the conveyor, and said means acts on the goaf side of the conveyor. Said means comprises a plurality of control devices, each of which has an upstanding plate fixed to the goaf side of the conveyor, an abutment member pivotally connected to the base of the upstanding plate, and an actuator arranged between the abutment member and the upstanding plate. The actuators are effective to pivot the conveyor relative to the abutment members. Each actuator comprises a hydraulic ram and a toggle linkage which magnifies the working stroke of the ram.

REFERENCES:
patent: 3649078 (1972-03-01), Grebe
patent: 3874734 (1975-04-01), Plevak
patent: 3915500 (1975-10-01), Schlusener
patent: 4243268 (1981-01-01), Lobbe

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