Exhaust and/or condensate port for cured in place liners and installation methods and apparatus
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United States of America Patent
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Dec 27, 2011
Grant Date -
Jan 4, 2007
app pub date -
Feb 8, 2006
filing date -
Feb 9, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
A process for porting air inflated flexible resin impregnated cured in place liner by pulling without loss of pressure is provided. A selectively openable bulkhead fitting is installed at the pull-in end. The filling may be installed in the end of a pull-in liner; on a porting sleeve or secured to an inflated pulled in or inverted liner. A port is formed through the bulkhead fitting by cutting a hole through the valve assembly. A steam fitting with an exhaust hose is coupled to the bulkhead fitting while maintaining pressure in the inflation bladder. Steam for curing the resin is then introduced into the inversion apparatus to cure the resin and is exhausted through the exhaust hose.
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