Flexible seal

A composite flexible seal for providing a leak-proof joint within an annular space between the outer surface of a cylindrical pipe and the continuous unbroken surface of a circular opening passing axially into a pipe receiving member through one wall thereof, said seal including

• an annular body section fully contained within said opening that is formed of an elastomeric material, said body section having an outer surface having a diameter that is slightly greater than the diameter of the circular opening passing into said pipe receiving member and an inner surface having a diameter that is greater than the outside diameter of said pipe,
• a cylindrical ring encapsulated within the said body section that has an outside diameter that is less than the diameter of the opening in the pipe receiving member, said ring being formed of a spring-like material which permits the body section to be collapsed inwardly so that the body can be inserted axially into said circular opening and then snapped back into a circular condition to deform the body section into locking contact around the entire wall periphery of the opening to secure the body therein, and
• at least one circular deflectable fin depending inwardly from the body in a radial direction to encircle in sealing contact the outside surface of a pipe that is passed into the seal to form a leak-proof joint between the pipe and the receiving member.