Mining or in situ disintegration of hard material – Hard material disintegrating machines – Percussive-type cutter
Patent
1992-10-14
1994-08-02
Bagnell, David J.
Mining or in situ disintegration of hard material
Hard material disintegrating machines
Percussive-type cutter
173 4, 173192, E21C 2502, E21C 2728
Patent
active
053339371
ABSTRACT:
An excavating machine having a cutter head which is provided with both reciprocating impact hammers and a static pick. The impact hammers are mounted on either side of the static pick so as to flank this, and the tip of this can be extended or retracted relative to the tips of the hammers. The ripper pick can thus scarf out a mound of earth left between the two impact hammers, or can be extended to cut a channel into which the impact hammers then drive the adjacent material. The impact hammers can be tilted relative to the axis of the ripper pick so that their tips either precede or follow that of the pick as they are moved across the working face. The cutter assembly may be mounted to a tracked vehicle so as to extend forwardly from this for continuous mining, or laterally from this for long wall mining.
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