Manhole assembly with T-shaped hinge

Details Manhole assembly with T-shaped hinge Manhole assembly with T-shaped hinge

1988-04-07

1989-06-20

Novosad, Stephen J.

Road structure, process, or apparatus

Pavement

Vault cover-closure

16260, E02D 2914, E05D 710

Patent

active

048405140

ABSTRACT:
A manhole assembly includes a circular cover 4 seated in a frame 1 and removably hinged thereto by a T-shaped lug 16 extending radially from the cover and lying within a matingly configured receptacle 5 defined in an upper edge of the frame. Lips 9 overhang opposite interior ends of the deepened receptacle trough 7 to restrain the pivot shaft 18 of the lug against vertical removal with the cover closed, in which position the lug has no contact with the receptacle surfaces to avoid clanking noise upon the passage of a vehicle.

REFERENCES:
patent: 780441 (1905-01-01), Von Oven
patent: 1496466 (1924-06-01), Jackson
patent: 3130651 (1964-04-01), Werner
patent: 4372007 (1983-02-01), Lee
patent: 4756055 (1988-07-01), Welsch et al.

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