Mechanical plug device

Details Mechanical plug device Mechanical plug device

1983-04-13

1985-01-15

Shepperd, John W.

Pipes and tubular conduits

With closures and plugs

Inflation stem type

411 34, B65D 3912

Patent

active

044933444

ABSTRACT:
The mechanically operable plug device is for use with the end of a pipe or conduit. The plug device is for removably sealing the conduit end so that the conduit can be tested for leaks. The mechanically operable plug device is comprised of two spacially parallel plate members, a narrow, elastomeric, and radially expandable O-ring member which is disposed between the plate members, and adjustable lateral force means which is operable on the parallel plate members. The radially expandable O-ring member has a circumferentially disposed surface for engaging the interior surface of a conduit to be sealed, and a generally V-shaped cross section having inclined surfaces of a predetermined slope. The plate members have interiorly facing tapered shoulders of generally the same predetermined slope to engage the inclined surfaces of the O-ring. Subsequent to the placement of the plug device into a conduit end, the positive adjustment of the lateral force means causes the sloped opposing shoulders to impart lateral forces to the inclined surfaces of the O-ring to, thereby, cause it to expand outwardly to seal a conduit.

REFERENCES:
patent: 1919666 (1933-07-01), Patterson
patent: 2154498 (1939-04-01), Eagar
patent: 2720893 (1955-10-01), Foreman
patent: 3291156 (1966-12-01), Corsano
patent: 3613936 (1971-10-01), Kaiser

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