Road structure – process – or apparatus – Pavement – Vault cover-closure
Patent
1998-04-29
2000-03-14
Lisehora, James A.
Road structure, process, or apparatus
Pavement
Vault cover-closure
52 20, 137370, 137371, E03B 910
Patent
active
060364017
ABSTRACT:
A roadway access device such as manhole cover, a storm drain, or a utility valve box which facilitates road paving and grinding operations. The access device includes a riser assembly having an inverted frustoconical top portion that minimizes frictional engagement between the riser and the paved surface and permits repositioning in an elevated plane with no excavation necessary. There is a tapered upper portion that engages with an internally threaded extension nut with tool-engaging receptors and when the nut extension is rotated, the upper conical portion does not rotate, but displaces vertically. There is a riser member that is externally threaded and fixed in position relative to the rest of the assembly around which the extension nut rotates in order to vertically displace the access device. Additionally, there are separate removable lids constructed of high strength material which can be put in place during paving and grinding operations and easily removed when operations are complete. The riser assembly couples with an extended valve nut adapter which provides a housing for an existing valve nut extension which is capable of responding to an applied vertical load, and climatic changes by axial displacement and will provide protection for the valve nut extension from debris and natural elements.
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Morina John
Ryan Chester
Lisehora James A.
Litman Richard C.
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