Exhaust and/or condensate port for cured in place liners and...

Plastic and nonmetallic article shaping or treating: processes – Repairing or restoring consumer used articles for reuse – Hollow- or container-type articles

Reexamination Certificate

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Reexamination Certificate

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08083975

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.

REFERENCES:
patent: 5737822 (1998-04-01), Driver et al.
patent: 2003/0192610 (2003-10-01), Driver
patent: 2003/0209823 (2003-11-01), Waring et al.
patent: 2004/0149341 (2004-08-01), Driver
patent: 0290184 (1988-11-01), None
patent: 2335473 (1999-09-01), None
patent: 57178828 (1982-11-01), None
patent: WO 0198061 (2001-12-01), None
patent: WO 2007022232 (2007-02-01), None
Annex to the Communication in counterpart EP1846221, Jun. 10, 2009.
International Search Report for PCT/2006/004508.

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