Cutter drum assembly for longwall mining machines

Details Cutter drum assembly for longwall mining machines Cutter drum assembly for longwall mining machines

1982-09-13

1984-09-18

Leppink, James A.

Mining or in situ disintegration of hard material

Cutter tooth or tooth head

Cleansing fluid passage

13762413, 239225, 239447, E21C 3520, E21C 3522

Patent

active

044719981

ABSTRACT:
A cutter drum assembly for longwall mining machines incorporating means for spraying trickle water onto the face area being mined as the cutter drum rotates. This requires valving for supplying high-pressure liquid to only those nozzles adjacent the face area as the drum rotates. In accordance with the invention, the valving takes the form of individual valves spaced around the drum, the valves being actuated by a relatively low-pressure control medium (i.e., a liquid) which obviates the necessity for the close tolerances and rigid sealing requirements of prior art devices where high-pressure liquid valve assemblies were built into the rotary connection between a support shaft and the drum which rotates about it.

REFERENCES:
patent: 1763154 (1930-06-01), Holzwarth
patent: 3374033 (1968-03-01), Arentzen
patent: 3747982 (1973-07-01), Agnew et al.
patent: 4049318 (1977-09-01), Fruin
patent: 4368925 (1983-01-01), Honke

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