Plug

Details Plug Plug

1980-11-06

1983-03-22

Bryant, III, James E.

Pipes and tubular conduits

With closures and plugs

Inflation stem type

138 93, F16L 5512

Patent

active

043771840

ABSTRACT:
A plug includes an elongated tubular casing of elastomeric material having two open ends longitudinally spaced from each other. Two upper caps are inserted in respective open ends of the casing so as to bound with the same an interior of the plug. Each of the caps has a circumferentially elongated wall extending inside the interior in surface contact with the corresponding portion of the inner surface of the casing. Each of the mentioned walls is vulcanized to the corresponding portion of the inner surface of the casing so as to sealingly close the latter from both ends thereof.

REFERENCES:
patent: 2678666 (1954-05-01), Theis et al.
patent: 3276481 (1966-10-01), McNulty
patent: 3459230 (1969-08-01), Smith

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