Apparatus and method for improved pipe to manhole sealing

Details Apparatus and method for improved pipe to manhole sealing Apparatus and method for improved pipe to manhole sealing

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F16L 17/10 (2006.01) E03F 3/04 (2006.01) E03F 5/02 (2006.01) F16J 15/46 (2006.01) F16L 17/025 (2006.01) F16L 41/08 (2006.01)

Patent

CA 2004749

A system and apparatus for sealably and flexibly joining a pipe member and an enclosed body formed with a port hole defined by a circular edge including a seal comprising a double-walled elastic sleeve with an annular cavity. The cavity contains a dry, liquid-activated coagulant material that forms a cellular, gelatinous mass that fills the cavity and supports the sleeve when activated with water. When the seal is properly positioned, water is pumped under pressure through a valve into the cavity to expand the elastic sleeve and to seal the engagement with the pipe and the body having a port hole. Over time, the water and coagulant material form a gel that remains in a viscous state and maintains the seal.

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