Mining or in situ disintegration of hard material – Hard material disintegrating machines – With mine roof-supporting means
Patent
1979-02-21
1980-05-20
Purser, Ernest R.
Mining or in situ disintegration of hard material
Hard material disintegrating machines
With mine roof-supporting means
299 18, 299 67, 405144, E21D 908
Patent
active
042036267
ABSTRACT:
The articulated boom-dipper-bucket assembly is utilized in a tunnel boring machine of the type which includes a hollow cylindrical body with a front circular cutting edge and a central axis on which an excavator including the assembly is positioned. The assembly includes a base having a front face facing axially of the machine and being mounted on a bulkhead having siderails which are received in channels fixed to the body and extending parallel to the central axis. A piston and cylinder mechanism is associated with the bulkhead for reciprocating same in a direction parallel to the central axis. The assembly further includes a boom having one end pivotally mounted to the front face of the base at one side thereof and a second end positioned outwardly from the base, an elongate dipper member pivotally mounted at a first inner end to the second outer end of the boom, and a bucket-scoop having an inner edge and an outer cutting edge and being pivotally mounted to a second outer end of the dipper member. The assembly also includes a mechanism for rotating the base on the bulkhead, a first reciprocal power mechanism pivotally connected at one end to the front face of the base at the other side thereof and pivotally connected at the other end to the boom at a point spaced from the first end thereof, a second reciprocal power mechanism pivotally connected at one end to the first end of the boom and at the other end to the first end of the dipper member and a third reciprocal power mechanism pivotally connected at one end to the first end of the dipper member and at the other end to the inner edge of the bucket-scoop.
REFERENCES:
patent: 3332721 (1967-07-01), Samoilov et al.
patent: 3404920 (1968-10-01), Tabor
patent: 3556599 (1971-01-01), Fikse
patent: 3612609 (1971-10-01), Reuls
patent: 3966256 (1976-06-01), Fikse
Brezina John C.
Purser Ernest R.
Zokor Corporation
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