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

1976-07-30

1978-02-14

Pavelko, Thomas P.

Metal working

Method of mechanical manufacture

Assembling or joining

156122, 264 35, 264 466, 264 469, 264229, 264295, 277 343, B23P 1102

Patent

active

040730484

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: 2292290 (1942-08-01), Robins
patent: 2503882 (1950-04-01), Medford
patent: 3787061 (1974-01-01), Yoakum
patent: 3832438 (1974-08-01), Ditcher
patent: 3973783 (1976-08-01), Skinner

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