Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,...
Patent
1994-11-10
1997-08-05
Dang, Hoang C.
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
294 8625, F16L 1028
Patent
active
056535546
ABSTRACT:
Apparatus for removing piping from the ground comprises a cable (1) which has pipe engaging means (2) disposed along its length. The pipe engaging means (2) are arranged such that the cable (1) is insertable into a pipe (3) in one direction but that attempted withdrawal of the cable (1) in the opposite direction relative to the pipe (3) causes the pipe engaging means (2) to jam the cable (1) in the pipe (3). The pipe (3) can then be pulled from the ground, the pulling force being distributed along the length of the pipe (3).
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Austin Graham Arthur
Preston Nicholas Jason John
Dang Hoang C.
North West Water Group PLC
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