Internal obturators for pipes

Details Internal obturators for pipes Internal obturators for pipes

1983-04-15

1984-04-17

Marcus, Stephen

Pipes and tubular conduits

With closures and plugs

Inflatable

F16L 5512

Patent

active

044428677

ABSTRACT:
The invention relates to an internal obturator for a pipe for use in separating two spaces inside a pipe. The obturator comprises a rigid hollow body comprising two end plates connected by a cylinder having a lesser diameter than the end plates between which an annular inflatable bladder of a jack is provided extending around the cylinder. The jack is inflated to apply a cylindrical wall against the inner surface of the wall of the pipe. The wall which is independent of the bladder of the jack may be connected by its ends to the end plates or may simply be inserted therebetween.

REFERENCES:
patent: 1710439 (1929-04-01), Taylor
patent: 3034522 (1962-05-01), Lithun
patent: 3259192 (1966-07-01), Hyde
patent: 3294121 (1966-12-01), Powell et al.
patent: 3604732 (1971-09-01), Malone
patent: 3690348 (1972-09-01), Patterson
patent: 3971437 (1976-07-01), Clay et al.

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