Soil-displacement drill and method for manufacturing a pile

Details Soil-displacement drill and method for manufacturing a pile Soil-displacement drill and method for manufacturing a pile

1984-10-11

1986-11-18

Levy, Stuart S.

Boring or penetrating the earth

Boring without earth removal

Fluid passage to exterior of drive point

175171, 175388, 175394, 405236, 405242, 405253, E02D 536, E21B 1044

Patent

active

046230254

ABSTRACT:
To the drill pipe connects a head comprising a cylinder-shaped portion and a cone-shaped point. Three spiral ribs are regularly distributed over the head. Each rib has a downwardly-extending rib portion standing on the point and having an outer side making an angle between 0.degree. and 5.degree. with the drill axis and an inner side making with the outer side of the point an angle which is smaller than 90.degree. increased by half the apex of the point, and has a outwardly-extending rib portion standing on the cylinder-shaped head portion and having a top side making an angle between 85.degree. and 95.degree. with the outer side of this head portion. The lowermost edge of the rib portion standing on the point merges into the outermost edge of the other rib portion. The apex of the point lies between 85.degree. and 95.degree..

REFERENCES:
patent: 4193461 (1980-03-01), Lamberton et al.
patent: 4458765 (1984-07-01), Feklin et al.
patent: 4484640 (1984-11-01), Feklin et al.
patent: 4496011 (1985-01-01), Mazo et al.

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