Hydraulic and earth engineering – Foundation – Columnar structure
Patent
1987-05-20
1990-03-27
Reese, Randolph A.
Hydraulic and earth engineering
Foundation
Columnar structure
405231, 405254, 405256, 175 19, 175121, 173 11, 173 12, E02D 722, E02D 556
Patent
active
049115812
ABSTRACT:
An apparatus for screwing a concrete pile (10) into ground comprises a rotary drive (26, 40, 42) and a linear drive (46, 48) both acting on the pile. An angle indicator (58) is associated to the rotary drive (26, 40, 42) and a linear position indicator cooperates with the linear drive (46, 48). A control unit (60) receives the output signals of the angle indicator (58) and the linear position indicator (56) and provides control signals to the rotary drive (26, 40, 42) and the linear drive (42, 48) corresponding to the pitch of the helical rib (16) formed on the concrete pile (10).
REFERENCES:
patent: 3277968 (1966-10-01), Grimaud
patent: 3327789 (1967-06-01), Furuseth
patent: 4147457 (1979-04-01), Washida
patent: 4614462 (1986-09-01), Itou
patent: 4621950 (1986-11-01), Kinnan
patent: 4708530 (1987-11-01), Faber
Delmag Maschinenfabrik Reinhold Dornfeld GmbH & Co
Philpitt Fred
Reese Randolph A.
Ricci John A.
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