Closure device with peripheral double acting inflatable seal

Details Closure device with peripheral double acting inflatable seal Closure device with peripheral double acting inflatable seal

1979-10-03

1981-02-17

Little, Willis

Pipes and tubular conduits

With closures and plugs

Test plugs

138 93, F16L 5512

Patent

active

042509262

ABSTRACT:
A closure device useable as a test plug to block an extremity of a length of pipe for the pressure testing and repair thereof, including a cylindrical body component formed of two cylindrical half sections operationally readily detachably secured together. The assembled body component of such test plug includes a somewhat T-shaped peripheral channel narrowest at the outer periphery of such test plug body component operationally carrying a circular, inflatable, double acting seal element substantially completely positioned therein when uninflated. On inflation, inner and outer walls of such seal element deform to the same extent, while side walls thereof partially move out of such channel to permit such inner and outer wall deformation; each of such seal element side walls carrying a flange to limit the movement thereof out of such channel. One of such test plug body component half sections includes a web extending thereacross to block the passage of fluid therethrough except when a threaded aperture provided in a raised area thereof is utilized for this purpose; such aperture otherwise being closed by a threaded stopper element. The seal element is removable from such test plug body component peripheral channel when the half sections thereof are separated.

REFERENCES:
patent: 1710439 (1929-04-01), Taylor
patent: 2133730 (1938-10-01), Brundred
patent: 3722895 (1973-03-01), Mevissen

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