Method and apparatus for replacing old underground conduits

Details Method and apparatus for replacing old underground conduits Method and apparatus for replacing old underground conduits

2011-08-16

2011-08-16

Wilson, Lee D (Department: 3727)

Implements or apparatus for applying pushing or pulling force

Method or apparatus for placement of conductive wire

Conduit snakes

C254S13430R

Reexamination Certificate

active

07997559

ABSTRACT:
In a method and an apparatus for replacing old underground conduits (4), the old conduit (4) is first laid bare with the aid of a ground drilling device (8) with an overdrilling head and then, in turn, a new conduit (5) is drawn in with the aid of the drill rods (7) and at the same time—in a uniform operating step—the old conduit is pulled out of the ground.

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