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

B - Operations, Transporting

23

P

26/161, 61/2.4

B23P 15/00 (2006.01) B23P 11/02 (2006.01)

Patent

CA 1077692

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.

292374

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