METHOD AND APPARATUS FOR FORMING A COATING ON A LINING OF A CONDUIT IN SITU
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United States of America Patent
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Issued Date -
Apr 25, 2013
app pub date -
Oct 19, 2011
filing date -
Oct 19, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention relates to a method and apparatus for repairing the wall of a conduit where a coating is placed onto a conduit lining using a non-absorbent bladder preferably made of polyurethane and material capable of curing and hardening, such as a grout or thermoset resin, preferably an epoxy. The coating is to be formed on the conduit lining after the lining is placed against the walls of the conduit. The non-absorbent bladder and the material capable of curing and hardening should be compatible for adhesion. The material capable of curing and hardening is placed between the wall of the pipe and the non-absorbent bladder by an inversion technique, and the non-absorbent bladder permanently bonds to the material capable of curing and hardening.
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