Apparatus and method for sealing tubes

Details Apparatus and method for sealing tubes Apparatus and method for sealing tubes

1988-11-17

1990-12-11

Schwadron, Martin P.

Heat exchange

With repair or assembly means

29447, 138 89, 138 97, F28F 1106, F16L 5511

Patent

active

049763075

ABSTRACT:
A plug member adapted for insertion into a tube end seals about its periphery in response to a predetermined activation to prevent fluid flow through the tube. In one embodiment, the plug contains annular rings that expand radially outwardly in response to thermal excitation. In an alternate embodiment, a welding material is forced about the plug periphery to seal with the interior surface of a tube in response to a predetermined activation.

REFERENCES:
patent: 3900939 (1975-08-01), Greacen
patent: 4573248 (1986-03-01), Hackett
patent: 4637436 (1987-01-01), Stewart, Jr. et al.
patent: 4723578 (1988-02-01), Mordarski et al.

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