Drilling mast with movable and fixed unscrewing vice

Details Drilling mast with movable and fixed unscrewing vice Drilling mast with movable and fixed unscrewing vice

2005-10-04

2005-10-04

Neuder, William (Department: 3672)

Boring or penetrating the earth

With magazine for successively moving unconnected, oriented...

C175S162000, C173S185000

Reexamination Certificate

active

06951257

ABSTRACT:
The invention is a new drill for making micropiles, equipped with a mast on which the head-carrying trolley slides and having at the bottom of the mast two pairs of vices, a lower fixed vice and a upper unscrewing vice. Besides being able to rotate around the drilling axis, the unscrewing vice is able to move along said mast with respect to the lower fixed vice. The advantages are considerable, since it is no longer necessary to dismantle the rod and the covering during the extraction stages.

REFERENCES:
patent: 4403666 (1983-09-01), Willis
patent: 4703811 (1987-11-01), Lam
patent: 4821814 (1989-04-01), Willis et al.
patent: 5575344 (1996-11-01), Wireman
patent: 6138776 (2000-10-01), Hart et al.
patent: 2002/0157870 (2002-10-01), Bischel et al.
patent: 2003/0056986 (2003-03-01), De Lille
patent: 0 379 187 (1990-07-01), None
patent: 2 610 363 (1988-08-01), None
patent: 2 625 239 (1989-06-01), None

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