Gasket seal between sewer pipe and manhole opening

Details Gasket seal between sewer pipe and manhole opening Gasket seal between sewer pipe and manhole opening

1977-09-09

1979-07-03

Ward, Jr., Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 343, 277207A, 277165, 277218, 285230, 285231, F16L 2102, F16J 1532

Patent

active

041598296

ABSTRACT:
An improved seal for closing the space between a pipe and the wall of an opening through which it passes, using a linear extrusion of elastomeric material, of predetermined length to form a gasket. The extrusion has a hollow, pear-shaped head formed integrally with a T-shaped anchoring flange. It is curled into the form of a right cylinder, and its mating ends are vulcanized together. The pear-shaped portion is deflected radially inwardly and the T-shaped anchoring flange outwardly, the latter being then embedded in concrete used to wall the opening for the pipe. The pear-shaped portion is free in space and provides a pneumatic cushion for the pipe.

REFERENCES:
patent: 2360731 (1944-10-01), Smith
patent: 2662053 (1953-12-01), Brown
patent: 3661197 (1972-05-01), Peterson
patent: 3787061 (1974-01-01), Yoakum
patent: 3832438 (1974-08-01), Ditcher
patent: 3973783 (1976-08-01), Skinner et al.

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