Plastic fillable manhole cover with penetrating handles

Details Plastic fillable manhole cover with penetrating handles Plastic fillable manhole cover with penetrating handles

1991-01-31

1992-06-23

Britts, Ramon S.

Road structure, process, or apparatus

Pavement

Vault cover-closure

E02D 2914

Patent

active

051237768

ABSTRACT:
A manhole cover comprises a top having a top surface and an edge portion, a depending portion having a sidewall and a bottom surface, and an interior chamber. The manhole cover is fabricated from a first material, while the interior chamber is at least partially filled with a second material. The manhole cover preferably includes recessed handles which are recessed into the top and extend downwardly through the bottom surface. Cooperative engagement means in the form of inter-fitting indentations and protuberances are provided in the top surface and the bottom surface respectively. The bottom surface includes a first surface portion which includes a peripheral edge portion and a bracing portion. The bracing portion includes a plurality of brace members each of which have a lower brace surface and a brace sidewall.

REFERENCES:
patent: 1014138 (1912-01-01), Ford
patent: 1673145 (1926-06-01), Gschwind
patent: 2356750 (1942-08-01), Walker
patent: 4123184 (1978-10-01), Whitlock
patent: 4762440 (1988-08-01), Argandona
patent: 4861186 (1989-08-01), Fern
patent: 4974992 (1990-12-01), Harter

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