Pipes and tubular conduits – Repairing – Patches
Patent
1992-03-10
1994-10-04
Gerrity, Stephen F.
Pipes and tubular conduits
Repairing
Patches
285 15, 4051501, 405154, F16L 5518
Patent
active
053517202
ABSTRACT:
Method and apparatus for internal repair of conduit system. An inner sleeve is employed which is configured to avoid undue pressure being applied to the inner surface of a damaged conduit section as it is expanded into position. A grouting area is defined between the outer surface of the sleeve and the inner surface of the conduit section or sections being repaired. In one embodiment, a layer of open-celled material is placed around the coiled sleeve, which is thereafter impregnated with a quantity of grout. In this embodiment of the invention, each longitudinal end of the sleeve is flared outwardly for contacting the inner surface of the damaged conduit section and for retaining the grout as it is squeezed out of the gasket upon the expansion of the inner sleeve to its expanded and locked position.
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Gerrity Stephen F.
Link-Pipe, Inc.
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