Mining or in situ disintegration of hard material – Hard material disintegrating machines – Stepper-type advance-causing means
Patent
1983-01-27
1985-07-09
Novosad, Stephen J.
Mining or in situ disintegration of hard material
Hard material disintegrating machines
Stepper-type advance-causing means
175 61, 299 56, E21C 2902
Patent
active
045278377
ABSTRACT:
A tunnel boring machine for controlled boring of a curvilinear tunnel including a rotating cutter wheel mounted on the forward end of a thrust cylinder assembly having a central longitudinal axis aligned with the cutter wheel axis of rotation; the thrust cylinder assembly comprising a cylinder barrel and an extendable and retractable thrust arm received therein. An anchoring assembly is pivotally attached to the rear end of the cylinder barrel for anchoring the machine during a cutting stroke and providing a rear end pivot axis during curved cutting strokes. A pair of laterally extending, extendable and retractable arms are fixedly mounted at a forward portion of the cylinder barrel for providing lateral displacement in a laterally curved cutting mode and for anchoring the machine between cutting strokes and during straight line boring. Forward and rear transverse displacement and support assemblies are provided to facilitate cutting in a transversely curved cutting mode and to facilitate machine movement between cutting strokes.
REFERENCES:
patent: 3061288 (1962-10-01), Robbins
patent: 3345108 (1967-10-01), Newman et al.
patent: 3920277 (1975-11-01), Winberg et al.
patent: 3963080 (1926-06-01), Walker
patent: 4185873 (1980-01-01), Bohnes et al.
patent: 4312541 (1982-01-01), Spurgeon
DelSignore Mark J.
Harrison Western Corporation
Novosad Stephen J.
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