Cover for manhole structures

Details Cover for manhole structures Cover for manhole structures

1975-10-16

1977-03-22

Jaudon, Henry S.

Road structure, process, or apparatus

Pavement

Vault cover-closure

E02D 2908

Patent

active

040133745

ABSTRACT:
A cover for manhole structures embodying a metal portion constructed of high strength material and assembled to provide maximum strength with a minimum of weight. A concrete portion is carried by the metal portion with the weight of the concrete portion being so proportioned relative to the weight of the metal portion that the combined weight thereof provides a manhole cover of a predetermined minimum weight.

REFERENCES:
patent: 680287 (1901-08-01), Steele
patent: 681995 (1901-09-01), Steele
patent: 1689646 (1928-10-01), Tutsch
patent: 3289556 (1966-12-01), Russell

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