Fluid handling – Processes – Cleaning – repairing – or assembling
Patent
1992-12-30
1994-02-15
Walton, George L.
Fluid handling
Processes
Cleaning, repairing, or assembling
1510416, 151042, 137245, 1372455, 137318, 138 97, F16K 710, F16L 55124
Patent
active
052858065
ABSTRACT:
A method and apparatus for sealing off flow in a pipeline for the purpose of repairing the line includes a combination of a restraining rod and inflation bag which can be installed on either or both sides of the intended site of repair; and a flexible sleeve is provided for use in association with the entry ports and any associated valve members for insertion of the restraining rod and bag to prevent the escape of gas from the line during the insertion procedures. Once the line is repaired, the restraining rod and inflation bag can be removed and the entry ports completely sealed off.
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Public Service Company of Colorado
Reilly John E.
Walton George L.
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