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

1989-09-21

1991-02-19

Shoap, Allan N.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277207A, 277226, F16J 1546

Patent

active

049937227

ABSTRACT:
An apparatus for sealably and flexibly joining together a pipe member and an enclosed body in a sewer system having a seal comprising an elastic sleeve with an annular cavity. The cavity contains a coagulant material that forms a cellular, viscous gel 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 into sealing engagement with the pipe and the manhole. In time the water and coagulant material forms the gel that remains in the viscous state.

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