Adjustable manhole cover assembly

Details Adjustable manhole cover assembly Adjustable manhole cover assembly

1990-07-24

1991-09-03

Britts, Ramon S.

Road structure, process, or apparatus

Pavement

Vault cover-closure

404 25, E02D 2914

Patent

active

050448188

ABSTRACT:
A vertically adjustable manhole cover assembly providing for ease of vertical adjustment and stable support of the manhole cover subsequent to roadway resurfacing. The manhole cover assembly utilizes annular adjustment rings at both the bottom and top of a vertically adjusted annular sleeve positioned within the annular frame of the manhole cover assembly for support of the manhole cover. The upper annular support ring includes an annular flange extending radially outwardly beyond the annular frame which is captured by the roadway resurfacing material so as to provide additional support to the vertically adjustable manhole cover assembly after road resurfacing.

REFERENCES:
patent: 599457 (1898-02-01), Sanborn
patent: 1257324 (1918-02-01), Daniels
patent: 3237538 (1966-03-01), McPheeters et al.
patent: 3240133 (1966-03-01), Binette
patent: 3331295 (1967-07-01), Sorrell
patent: 3926533 (1975-12-01), Binette
patent: 4143988 (1979-03-01), Arment
patent: 4158515 (1979-06-01), Helms
patent: 4197031 (1980-04-01), Hild
patent: 4337005 (1982-06-01), LeBaron

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