Drill for making a pole in the ground and a method for applying

Details Drill for making a pole in the ground and a method for applying Drill for making a pole in the ground and a method for applying

1997-09-19

1999-03-02

Schoeppel, Roger

Boring or penetrating the earth

With tool shaft detail

Helix or helically arranged structure

175 57, 1753255, 175338, 175391, 175394, E21B 1044

Patent

active

058758607

ABSTRACT:
Drill for making a pole in the ground, whereby this drill (9) is provided with a passage (15) and whereby this drill has at the bottom a screw-shaped displacement part (11) of which the outside increases in radius upwardly, up to a diameter larger than that of the drill tube (8), characterized in that the displacement part (11) passes with its upper extremity into a cylindrical part (12) which is provided on its mantle with at least a screw blade (13) which runs in the shape of a screw in the same direction as the displacement part (11), but of which the pitch (S2) is larger than the pitch (S1) of the displacement part (11).

REFERENCES:
patent: 4402371 (1983-09-01), Rocchetti
patent: 4623025 (1986-11-01), Verstraeten
patent: 4790689 (1988-12-01), Henn et al.

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