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US 4,059,163 AGranted
Mine drilling apparatus and method
AssigneeCaterpillar Tractor Co.
InventorRobert N. Stedman
Life of this patent
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AssigneeCaterpillar Tractor Co.
InventorRobert N. Stedman
Estimating the term…
A drilling apparatus comprises a support structure adapted to be moved on rails to position a drilling assembly mounted thereon adjacent to a selected drilling site. The drilling assembly includes a carriage movably mounted on the support structure for longitudinal movements thereon and a shroud secured on the carriage and having an auger rotatably mounted therein. A cutting edge, having a square configuration, is disposed adjacent to a forward end of the auger and at least one double-acting hydraulic cylinder is interconnected between the support structure and the carriage to aid in pushing the auger and cutting edge through material to form an opening having a square cross section. Upon full extension of the auger and cutting edge, a second drilling assembly may be attached rearwardly on the first-mentioned drilling assembly to increase the overall penetration capabilities of the drilling apparatus.
A drilling apparatus comprising a support, an auger assembly including a carriage mounted on said support for longitudinal movements thereon, a rotatable auger, first motor means for selectively rotating said auger, a cutting edge disposed adjacent to a forward end of said auger to cooperate therewith for drilling purposes, a tubular shroud disposed around said auger, a plurality of circumferentially disposed fastening means releasably connecting a rearward end of said shroud to said carriage and an annular collar means adjustably mounted on said carriage for movement between a first position for permitting removal of said fastening means and a second position for preventing removal of said fastening means, and second motor means interconnected between said support and the carriage of said drilling assembly for selectively moving said drilling assembly longitudinally on said support.
Dependencies are inferred from the claim text.