Apparatus for drilling holes in the ground
OwnerAntoine Causseinventor
Life of this patent
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Abstract
The present invention relates to an apparatus for drilling holes in the ground. The apparatus comprises a cylindrical drilling tool having one end coupled to a motor assembly for rotating the tool by way of an elongate rotatable sleeve. A hydraulic jack is disposed in the sleeve for rotation therewith. The piston rod of the jack extends longitudinally of the drilling tool and carries a valve-action member arranged to allow drilled material to enter the drilling tool and to retain the material therein. The piston rod is movable longitudinally relative to said tool for the discharge of said material. The apparatus of the invention is able to drill holes rapidly in a large variety of soils.
Claims7
Apparatus for drilling holes in the ground comprising a cylindrical drilling tool having an upper end and a lower end, a drilling edge being provided at the lower end of said drilling tool, a motor assembly for rotating said drilling tool, a rotatable elongate sleeve coupling said motor assembly to said drilling tool, said sleeve being interposed between the motor assembly and the drilling tool and being keyed to the upper end of said drilling tool, a hydraulic jack disposed for rotation with said sleeve, the hydraulic jack having a piston rod which extends through the upper end of the drilling tool into the drilling tool said piston rod being longitudinally movable relative to said drilling tool, and means for closing and filling the drilling tool provided on the free end of said piston rod.
Dependencies are inferred from the claim text.