Manhole cover sealing and locking arrangement

Details Manhole cover sealing and locking arrangement Manhole cover sealing and locking arrangement

1987-10-20

1988-08-16

Friedman, Carl D.

Static structures (e.g., buildings)

With entrance for persons or objects in horizontal or...

With additional enclosure structure; e.g., manhole

404 25, 220301, E02D 2914

Patent

active

047634499

ABSTRACT:
A manhole for an urban sanitary system comprises a cover 2, a frame 1 for receiving the cover, a toric elastomeric sealing ring G1 interposed between the frame and the cover, and a soundproofing ring G2 on which the cover seats. The locking of the cover on the frame and the support of the cover on the rings G1and G2 are implemented by a plurality of flanges 4 recessed in the frame and bolted thereto.

REFERENCES:
patent: 175725 (1876-04-01), Mecklenberg
patent: 794661 (1905-07-01), Clark
patent: 1384712 (1921-07-01), Shanley
patent: 3102660 (1963-09-01), Bowden
patent: 4203686 (1980-05-01), Bowman

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