Boring or penetrating the earth – Means traveling with tool to constrain tool to bore along...
Patent
1976-08-16
1977-11-22
Purser, Ernest R.
Boring or penetrating the earth
Means traveling with tool to constrain tool to bore along...
173152, 175 61, 175 62, 175 88, 175 91, 299 18, 299 56, E21C 2558
Patent
active
040591638
ABSTRACT:
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.
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patent: 3856093 (1974-12-01), Case
patent: 3910358 (1975-10-01), Martinek
Caterpillar Tractor Co.
Purser Ernest R.
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