Manhole frame

Details Manhole frame Manhole frame

1992-12-07

1994-06-07

Rosenbaum, Mark

Road structure, process, or apparatus

Pavement

Vault cover-closure

404 26, F02D 2914

Patent

active

053183762

ABSTRACT:
A manhole frame having a top with an opening therein defining a cover seat area, a side wall extending downward from the top to an inwardly extending lower flange, the exterior of the side wall being outwardly extending at its top and inwardly extending at its lower portion down to an inwardly extending lower flange. Also disclosed is a method of installing and raising the manhole frame to a new level.

REFERENCES:
patent: 3331295 (1967-07-01), Sorrell
patent: 3611889 (1971-10-01), Levinson
patent: 3712009 (1973-01-01), Campagna
patent: 4203686 (1980-05-01), Bowman
patent: 4337005 (1982-06-01), LeBaron
patent: 4449715 (1984-05-01), Gagas
patent: 4968600 (1976-07-01), Bowman
patent: 5044818 (1991-09-01), Pritchard
patent: 5205668 (1993-04-01), Adams
patent: 5211504 (1993-05-01), Trudel

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