Pipes and tubular conduits – Repairing – Patches
Patent
1997-11-26
1999-06-29
Brinson, Patrick F.
Pipes and tubular conduits
Repairing
Patches
138 97, 156287, 264269, F16L 5516
Patent
active
059154195
ABSTRACT:
A cured in place lateral seal impregnated with a curable resin in the form of a "floppy top hat" for sealing the connection between an existing main conduit and a lateral connection is provided. The seal includes a brim portion bonded to a relatively short tubular section with the resin impregnable surfaces facing each other. The seal is formed by placing an annular ring about an opening in a template in the form of a pipe having a dimension and opening corresponding to the existing conduit and lateral, placing a tubular section of cured in place lining through the ring and the opening and bonding the tubular portion to the brim portion. The seal is impregnated with a resin by sealing the end of the tubular portion and then by placing the seal into a container with resin and drawing a vacuum to wet out the impregnable layer. The lateral seal is then ready for installation using a remote launching device having an expandable bladder which places the brim against the main pipeline about the lateral opening and everts the tubular portion into the beginning of the lateral pipeline.
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Reexamination Certificate (2498.sup.th) for United States Patent No. B1 4,581,247; Issued Mar. 7, 1995.
Murray Kevin P.
Smith Philip M.
Tweedie John
Wells Jeff
Brinson Patrick F.
Buchanan Lloyd G.
Insituform (Netherlands) B.V.
Wolfson Michael I.
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