Laying cables

Details Laying cables Laying cables

1991-07-18

1992-10-20

Swann, J. J.

Implements or apparatus for applying pushing or pulling force

Method or apparatus for placement of conductive wire

By fluid pressure differential in conduit

A61M 2500

Patent

active

051563762

ABSTRACT:
A cable (C) is laid in a pipeline (10) by pushing the cable and (C') through a hydraulically variable diaphragm in an inlet tube (11). The end (C') of the cable has collapsible moulded cups (20) attached which can be pushed through the diaphragm and which erect themselves to act as a drag inducing device so that flowed liquid in the pipeline can be used to pull the cable and (C') towards an exit tube (12) downstream. A cable pusher (13) pushes the cable through the inlet (11). The cable has a specific gravity less than the liquid, preferably 0.7, which is substantially pressure independent.

REFERENCES:
patent: 252956 (1882-01-01), Loane
patent: 2863681 (1958-12-01), Robbins
patent: 3107379 (1963-10-01), Hill
patent: 3179375 (1965-03-01), Hamrick
patent: 3669087 (1972-06-01), Hamrick et al.
patent: 3793732 (1974-02-01), Hamrick
patent: 4372792 (1983-02-01), Dey et al.
patent: 4596381 (1986-06-01), Hamrick

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