Manhole cover frames

Details Manhole cover frames Manhole cover frames

1996-05-08

1997-12-30

Lisehora, James

Road structure, process, or apparatus

Pavement

Vault cover-closure

404 26, E02D 2914

Patent

active

057022003

ABSTRACT:
A spacer arrangement is provided for use in raising the height of a manhole cover frame, including one or more base spacer elements and one or more upper side extension elements; said one or more base spacer elements are adapted to be located within said manhole cover frame with said one or more side extension elements extending upwardly relative thereto; the spacer arrangement is adapted to receive a manhole cover; at least an underside surface of said one or more base spacer elements includes downwardly directed projections for stabilising at least said one or more base spacer elements.

REFERENCES:
patent: 4553874 (1985-11-01), Thomann et al.
patent: 4592674 (1986-06-01), Baliva
patent: 4759656 (1988-07-01), Wilson
"Rattlefree and Basily Shimmed", Engineering News-Record, Dec. 12, 1957, p. 82.

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