Flexible standpipe and subsurface pressure seal

Details Flexible standpipe and subsurface pressure seal Flexible standpipe and subsurface pressure seal

1981-08-26

1984-01-24

Cohan, Alan

Fluid handling

With casing, support, protector or static constructional...

Static constructional installations

137403, 137593, 285158, 141287, F16L 500

Patent

active

044270240

ABSTRACT:
An expansible, resilient receptacle positionable about a standpipe installed for the relief of subsurface water pressure occasioned specifically by sewer backup. The receptacle surrounds the standpipe and communicates with the inner portion thereof through strategically located openings in the walls of the standpipe. The water introduced to the receptacle bulges its walls and urges a watertight engagement between the walls and floor about the base of the standpipe. The seal contains any water leaking upwardly around the base of the standpipe and prevents the floor from failing. In the event the excessive subsurface water pressure is encountered, the water is permitted to escape into the room to avoid possible rupture of the floor surface. The water is releaseable from the receptacle when the subsurface pressure diminishes.

REFERENCES:
patent: 576945 (1897-02-01), Brenneman
patent: 1762190 (1930-06-01), Noe et al.
patent: 1893979 (1933-01-01), Barrere

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