Method and apparatus for installation of underground pipes

Details Method and apparatus for installation of underground pipes Method and apparatus for installation of underground pipes

1997-01-03

1998-07-21

Bagnell, David J.

Boring or penetrating the earth

Enlargement of existing pilot throughbore requiring...

175106, 405154, 405184, F16L 100, F21B 410

Patent

active

057823111

ABSTRACT:
A pipe bursting apparatus includes a directional boring machine capable of simultaneously rotating and pulling a drill string and an impact tool connectable to the drill string. The impact tool includes a tubular housing ending in a front bursting head, an input shaft, bearings supporting the input shaft for rotation within the housing, a striker disposed for reciprocation within the housing to deliver impacts to a front anvil, and a drive mechanism for simultaneously pulling the impact tool forward in response to a pulling force on the input shaft and for reciprocating the striker to drive the tool forward by the action of cyclic impacts on the front anvil. The apparatus can carry out a pipe bursting operation in a manner that eliminates the need to use a separate pneumatic impact tool to burst the existing pipe.

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