Apparatus for drilling holes in the ground

Details Apparatus for drilling holes in the ground Apparatus for drilling holes in the ground

1978-11-13

1980-10-21

Leppink, James A.

Boring or penetrating the earth

With means movable relative to tool below ground to stop...

Stops flow by movement about fixed pivot

175310, 175404, E21B 920

Patent

active

042288622

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.

REFERENCES:
patent: 521175 (1894-06-01), Odewahn et al.
patent: 2730329 (1956-01-01), Jourdain
patent: 2769614 (1956-11-01), Zeni
patent: 2873950 (1959-02-01), Kandle
patent: 2915288 (1959-12-01), Crapez
patent: 3038546 (1962-06-01), Blubaugh et al.
patent: 3232361 (1966-02-01), Haspert
patent: 3817337 (1974-06-01), Panak et al.

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