Stabilizer for an in situ column drilling apparatus

Details Stabilizer for an in situ column drilling apparatus Stabilizer for an in situ column drilling apparatus

1992-06-26

1994-03-22

Reese, Randolph A.

Hydraulic and earth engineering

Foundation

Columnar structure

405232, 405254, 405253, E02D 700

Patent

active

052957675

ABSTRACT:
A stabilizer for an in situ column drilling apparatus comprises a first and second mounting arms, a first and second stabilizing members, and a first and second stabilizing tabs. The mounting arms are adapted for rotatable coupling to the shaft of column drilling systems. The first and second mounting arms are preferably positioned spaced apart along the shaft near the drilling auger. The mounting arms are coupled together by two stabilizing members at opposite ends of the arms distal the shaft. The stabilizing members are advantageously shaped to fit closely against the wall of the column to prevent changes in the auger's drilling course. The first and second stabilizing tabs are attached to the first and second stabilizing members, respectively. The first and second tabs are mounted to extend radially outward from the shaft and also prevent changes in the auger's drilling course.

REFERENCES:
patent: 4397588 (1983-08-01), Goughnour
patent: 4637758 (1987-01-01), Tamaki et al.
patent: 4793740 (1988-12-01), Schellhorn
patent: 4886400 (1989-12-01), Taki et al.
patent: 4906142 (1990-03-01), Taki et al.
patent: 4909675 (1990-03-01), Taki
patent: 5006016 (1991-04-01), Fukuda
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patent: 5013185 (1991-05-01), Taki
patent: 5013191 (1991-05-01), Kitanaka
patent: 5118223 (1992-06-01), Taki

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