Flexible seal member for non-metallic conduit to concrete manhole junction

Abstract

A sealing member for sealing a joint between a pipe and a wall defining an opening is provided. The sealing member has an annular base, a projection, and preferably first and second annular flanges. The annular base has a bottom and first and second sidewalls. The projection is attached to the base for anchoring the sealing member within the wall. In some embodiments it extends radially outwardly from the base. The first and second annular flanges extend from opposite sidewalls of the base. The first and second flanges each have a top and a bottom surface. The top surfaces of each can have an annular depressed portion, and each of the bottom surfaces can have a plurality of grooves formed therein. Preferably, the base includes at least one cavity extending completely around the circumference of the sealing member. There is also disclosed the use of the sealing member in a concrete manhole structure having a wall defining an annular opening through which a pipe having an outer surface can pass so that a joint is defined between the wall and the outer surface, with the sealing member being encased in appropriate grout to secure the sealing member to the concrete structure. The sealing member thus effectuates sealing of the joint between the pipe and the wall defining the opening.

Dependencies are inferred from the claim text.