Apparatus for removing piping from the ground

Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,...

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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).

REFERENCES:
patent: 1508417 (1924-09-01), Spitler
patent: 1572983 (1926-02-01), Barrier
patent: 1694953 (1928-12-01), Smoot
patent: 1775291 (1930-09-01), Niles
patent: 1805280 (1931-05-01), Gill
patent: 2650129 (1953-08-01), Axelsen
patent: 4006521 (1977-02-01), Pedone
patent: 4287953 (1981-09-01), Mazza
patent: 4637756 (1987-01-01), Boles
patent: 5029924 (1991-07-01), Stuckey

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