Road structure – process – or apparatus – Pavement – Vault cover-closure
Patent
1997-08-27
1998-08-04
Lisehora, James
Road structure, process, or apparatus
Pavement
Vault cover-closure
49387, 52 19, E02D 2914
Patent
active
057884064
ABSTRACT:
A device to assist in the opening of a manhole cover has a biasing member such as a spring and a pivot rod or rods. The rods and spring are each pivotably attached to first and second mounting brackets. The first mounting bracket is attached to a skirt for seating the manhole cover and the second mounting bracket is attached to the underside of the cover. The spring acts to rotate the manhole cover in a reverse direction to which the cover is intended to be opened until the cover contacts the rod or rods. Then, the cover is rotated in an opposite direction, preferably with manual assistance, using the rods as pivot arms.
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Hoffman David L.
Lisehora James
S. Bravo Systems, Inc.
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