Valve box cover

Details Valve box cover Valve box cover

1983-04-27

1984-07-24

Purser, Ernest R.

Road structure, process, or apparatus

Pavement

Vault cover-closure

52 20, 137371, 138 89, 220235, 29225667, 292260, 292DIG72, E02D 2914

Patent

active

044615973

ABSTRACT:
A cover capable of being both locked in position within a valve box or manhole cover and lifted upwards to assist in its removal, having a rotating bolt therein which maneuvers a lever base upwards or downwards which lever base causes the rotation of a lock lift lever extending through a slot in the side of the cover and which, when moved downwards, causes the lock member portion of the lock lift lever to tighten against the valve box and which when raised, rotates a lift member portion against the seat of the valve box thereby jacking the cover upwards so that it can be easily removed.

REFERENCES:
patent: 135822 (1873-02-01), LaForge
patent: 289663 (1883-12-01), Langill
patent: 458525 (1891-08-01), Farlow
patent: 969881 (1910-09-01), Klemm
patent: 1229429 (1917-10-01), Farley
patent: 3051200 (1962-08-01), Bevington
patent: 3550635 (1970-12-01), Schroer

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