Hydraulic and earth engineering – Foundation – Columnar structure
Patent
1998-03-31
2000-06-27
Lillis, Eileen Dunn
Hydraulic and earth engineering
Foundation
Columnar structure
405241, 405248, 405249, 405253, 175 21, 175113, 175162, 175203, E21B 726
Patent
active
060799064
ABSTRACT:
A method for making foundation piles in soil with a drilling device having an auger, the auger including two concentric tubes, an outer tube occupying an upper part of the auger and an inner tuber projecting partially as a prolongation of the upper part and occupying a lower part of the auger, the inner tuber having a first screw and the outer having one of a second screw and a plurality of blades, both of said tubes being displaceable with respect to each other, the method including the steps rotating the inner tube in a first direction, simultaneously rotating the outer tube in an opposite direction of the first tube and advancing the auger through said soil whereby the soil is compacted against a wall of a formed hole by the combined action of the first screw and the one of the second screw and plurality of blades of the inner and outer tubes.
REFERENCES:
patent: 3604214 (1971-09-01), Turzillo
patent: 4504173 (1985-03-01), Feklin
patent: 4595059 (1986-06-01), Katagiri et al.
patent: 5002435 (1991-03-01), Dupeuble
patent: 5927905 (1999-07-01), Van Halteren
European Search Report (EP 97 50 0229) (3 pages).
Lillis Eileen Dunn
Mayo Tara L.
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