Pipes and tubular conduits – Repairing – Patches
Reexamination Certificate
2011-03-15
2011-03-15
Brinson, Patrick F (Department: 3754)
Pipes and tubular conduits
Repairing
Patches
C138S097000, C156S287000, C156S294000, C405S150100, C264S269000
Reexamination Certificate
active
07905255
ABSTRACT:
A method and apparatus for use in repairing an underground conduit, such as a sewer pipe. A tubular bladder is filled within a selected portion of the length a conduit to occupy a large part of the interior while a sealant material in a fluid state is forced into the conduit to flow along the bladder to plug and seal defects in the conduit and at least partially fill voids in adjacent soil. A slender object such as a smaller tubular bladder extends along the bladder to provide a passageway for flow of sealant to defects in the conduit. A special plug may be used to direct the sealant into a selected portion of the conduit.
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Brinson Patrick F
Chernoff Vilhauer McClung & Stenzel LLP
LandOfFree
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