Adjustable manhole cover

Details Adjustable manhole cover Adjustable manhole cover

1983-05-18

1984-08-21

Murtagh, John E.

Static structures (e.g., buildings)

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

With additional enclosure structure; e.g., manhole

404 25, 404 26, E02D 2914

Patent

active

044662190

ABSTRACT:
Manhole cover support rings and clips are used to increase the height of an existing manhole cover support frame for raising the height of a manhole cover positioned thereon so as to match or be level with a resurfaced roadway. The support rings are split so as to be adjustable with respect to the diameter are position by clips on the existing manhole cover support frame and are secured thereto by clips to form the elevated support for the manhole cover.

REFERENCES:
patent: 1908909 (1933-05-01), Manz
patent: 2082269 (1937-06-01), Walker
patent: 3217619 (1965-11-01), Driver et al.
patent: 3218943 (1965-11-01), Bowman
patent: 3408778 (1968-11-01), Mason
patent: 3891337 (1975-06-01), McCoy
patent: 4038789 (1977-08-01), Axgarde et al.
patent: 4097171 (1978-06-01), Fier
patent: 4225266 (1980-09-01), Fier
patent: 4302126 (1981-11-01), Fier
patent: 4348281 (1982-09-01), Perry et al.

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