Method and apparatus for injecting foam into a pipeline, includi

Pipes and tubular conduits – With closures and plugs – Inflatable

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134 24, 134167C, F16L 5512

Patent

active

040833844

ABSTRACT:
Method and apparatus for injecting foam into a pipeline. Foam is produced and delivered under pressure to the inlet of a flexible foam-conducting tube. An inflatable plug slidably encircles the tube, so that the tube can be adjusted to extend any desired distance beyond the plug. The plug can be enlarged by inflation to bear against the wall of the pipe and also against the wall of the tube, so as to prevent the foam from flowing back beyond the plug.

REFERENCES:
patent: 1506418 (1924-08-01), Evensta et al.
patent: 2273984 (1942-02-01), Osborn
patent: 2976191 (1961-03-01), Weston
patent: 3075535 (1963-01-01), Lasting
patent: 3870085 (1975-03-01), Schneider
patent: 3874926 (1975-04-01), Horne et al.

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