Mining or in situ disintegration of hard material – Hard material disintegrating machines – With material-handling means
Patent
1988-08-31
1989-10-03
Novosad, Stephen J.
Mining or in situ disintegration of hard material
Hard material disintegrating machines
With material-handling means
37190, 299 89, E02F 324, E21C 2510
Patent
active
048712132
ABSTRACT:
An excavating apparatus for breaking and removing material away from an upright face of material is disclosed. The apparatus includes a rotary cutting head mounted between the fore ends of a pair of boom arms. The boom arms are pivotally mounted relative to the front end of a vehicular portion of the apparatus. A shroud partially surrounds the cutting head for confining material cut from the face. The shroud includes an edge shoe portion for engaging the face and is pivotally mounted at the fore-end of the boom arms. The shroud is adapted for selective rearward pivotal movement as the boom arms are swung upwardly for maintaining the edge shoe portion against the face. A position adjustable, pivotal breaker bar is provided along the cutting head for selectively sizing material being removed from the upright face being excavated. In the preferred embodiment, the breaker bar is pivotally mounted relative to the shroud.
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Bagnell David J.
Novosad Stephen J.
R. A. Hanson Company, Inc.
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