Structures for supporting manhole covers, grates and the like pr

Details Structures for supporting manhole covers, grates and the like pr Structures for supporting manhole covers, grates and the like pr

1981-02-17

1982-06-29

Byers, Jr., Nile C.

Road structure, process, or apparatus

Pavement

Vault cover-closure

52 20, 210165, E02D 2914

Patent

active

043370055

ABSTRACT:
This disclosure is concerned with apparatus for enabling extension or other leveling adjustment of manhole cover supporting structures and the like comprising extension spacer rings resiliently compressed in self-storing fashion adjacent a support sleeve portion of the supporting structure, and adapted to be forced downward from storage to expand into position below the sleeve to extend or adjust the level of the same.

REFERENCES:
patent: 638692 (1899-04-01), Banwell
patent: 2930295 (1960-10-01), Hale
patent: 3237538 (1966-03-01), McPheeters
patent: 3240133 (1966-08-01), Ross
patent: 3331295 (1967-02-01), Sorrell
patent: 3408778 (1968-11-01), Mason
patent: 3629981 (1971-07-01), McCaffery
patent: 3858998 (1975-07-01), Larsson et al.
patent: 3891337 (1975-06-01), McCoy
patent: 3926533 (1975-05-01), Binette
patent: 4075796 (1978-09-01), Cuozzo

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