Wells – Means for perforating – weakening – bending or separating pipe... – Perforating or splitting cutter
Patent
1998-03-30
2000-08-08
Neuder, William
Wells
Means for perforating, weakening, bending or separating pipe...
Perforating or splitting cutter
175 53, 405154, F16L 100
Patent
active
060987081
ABSTRACT:
An apparatus for pulling a pipe (12) into an earth bore, especially for replacing a breakable supply conductor laid in the earth, includes an approximately conical displacement head having a cylindrical tubular shaft (18) connected to its large diametered rear end, the outer diameter of which shaft corresponds to the large diameter of the displacement head and the inner diameter of which shaft is larger than the outer diameter of the pipe (12) to be pulled in. Means are provided for connecting the pipe (12) to be pulled in with the shaft (18) and is in the form of at least two clips extending parallel to the axis of the shaft (18) and fixed to the end of the shaft remote from the displacement head and angularly spaced from one another. Each of the connecting clips has a radial bore for receiving a headless connecting bolt (60), and the bore and the connecting bolt are so designed that when the connecting bolt is in its inserted condition with respect to the clip, it does not extend outwardly beyond the radial outer surface (54) of the clip (52).
REFERENCES:
patent: 3888519 (1975-06-01), Smith et al.
patent: 4507019 (1985-03-01), Thompson
patent: 5302053 (1994-04-01), Moriarty
patent: 5782311 (1998-07-01), Wentworth
patent: 5785458 (1998-07-01), Handford
Neuder William
Terra AG fuer Tiefbautechnik
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