Sealing manhole cover for use on existing unsealed sanitary sewe

Details Sealing manhole cover for use on existing unsealed sanitary sewe Sealing manhole cover for use on existing unsealed sanitary sewe

1977-06-29

1978-07-18

Byers, Nile C.

Road structure, process, or apparatus

Pavement

Vault cover-closure

210163, E02D 2914

Patent

active

041012364

ABSTRACT:
A manhole cover having no openings is provided with a blind pocket for insertion of a lifting tool and has a rectangular O-ring groove in the lower surface to receive a circular O-ring. The groove is so located as to cause the O-ring to engage the flat bearing surface of a conventional manhole cover frame. A complete seal against storm water is afforded.

REFERENCES:
patent: 134062 (1872-12-01), Ingalls
patent: 2488796 (1949-11-01), Baier
patent: 2791792 (1957-05-01), Shearer
patent: 3294000 (1966-12-01), Pelsue
patent: 3308727 (1967-03-01), Hurt
patent: 3920347 (1975-11-01), Sauriol

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