Inflatable plug for interiorly cylindrical conduits

Details Inflatable plug for interiorly cylindrical conduits Inflatable plug for interiorly cylindrical conduits

1983-02-15

1985-07-02

Bryant, III, James E.

Pipes and tubular conduits

With closures and plugs

Inflatable

138 89, F16L 5512

Patent

active

045262071

ABSTRACT:
A fluid inflatable plug for interiorly cylindrical conduits includes a rigid cylindrical mandrel having an elastomeric tubular sleeve about the outer curved surface of the mandrel. The sleeve includes reinforcements which extend in opposite sense helical paths throughout the longitudinal extent of the sleeve. The sleeve is folded back over one of its ends to form a loop region upon assembly to the mandrel. The ends of the sleeve are sealingly retained to the outer surface of the mandrel. A passage are provided for admitting and exhausting pressurized fluid between the sleeve and the outer curved surface of the mandrel. The plug may include a fluid passage therethrough independent of the passage for admitting an exhausting pressurized fluid between the sleeve and the surface of the mandrel.

REFERENCES:
patent: 2324520 (1943-07-01), Lamson
patent: 3858441 (1975-01-01), Comeau
patent: 3870085 (1975-03-01), Schneider
patent: 4144908 (1979-03-01), Dunn
patent: 4291727 (1981-09-01), Yie et al.

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