Mining or in situ disintegration of hard material – Hard material disintegrating machines – Stepper-type advance-causing means
Patent
1977-12-02
1980-11-04
Leppink, James A.
Mining or in situ disintegration of hard material
Hard material disintegrating machines
Stepper-type advance-causing means
299 33, 299 71, E21C 2568, E21C 2506
Patent
active
042316189
ABSTRACT:
A tunnel-excavating machine in which a chassis carrying a cutting drum is displaceable toward the face of a subterranean structure in which a tunnel is to be formed, the chassis being provided independently from a roof-support unit which is connected to the chassis only by at least one fluid-pressure cylinder arrangement. The cylinder arrangement is connected to the unit and/or the chassis by vibration damping means so that the cylinder arrangement can advance the chassis relative to the roof support unit or vice versa and vibration transmission from the chassis to the roof support unit is damped.
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Leppink James A.
Ross Karl F.
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