Boring and conduit/pipe system

Details Boring and conduit/pipe system Boring and conduit/pipe system

2006-11-07

2006-11-07

Bagnell, David (Department: 3672)

Hydraulic and earth engineering

Subterranean or submarine pipe or cable laying, retrieving,...

Advancing subterranean length of pipe or cable

C175S053000, C175S339000, C408S059000

Reexamination Certificate

active

07131790

ABSTRACT:
An extension rod has an interior end and an exterior end. The exterior end is formed with male screw threads. A primary bit has a cylindrical interior end and a conical exterior. Female threads at the interior end releasably couple with the extension rod. A secondary bit has a cylindrical interior end and a conical exterior end. Female threads at the interior end releasably couple with the extension rod. A length of line is coupled to the exterior end of the secondary bit. A coupler has a rearward end couplable to a linear member. A forward end is couplable to the rearward end of the secondary bit. In this manner the line, secondary bit and linear member may be pulled through the bore hole.

REFERENCES:
patent: 3697188 (1972-10-01), Pope
patent: 3871488 (1975-03-01), Sabre
patent: 4785885 (1988-11-01), Cherrington et al.
patent: 5542486 (1996-08-01), Curlett
patent: 6682264 (2004-01-01), McGillis
patent: 2001/0016148 (2001-08-01), Wentworth et al.

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