Manhole adjusting extension ring section

Details Manhole adjusting extension ring section Manhole adjusting extension ring section

1994-06-06

1995-11-28

Britts, Ramon S.

Road structure, process, or apparatus

Pavement

Vault cover-closure

404 26, 52 20, E02D 2914

Patent

active

054701724

ABSTRACT:
A molded plastic extension member for use in increasing the height of manholes, or catch basins when surfacing or resurfacing a roadway is described. A wedge to adjust the angle of the catch basin support frame or the manhole cover support frame is also described. The extension includes a pocket for reducing the total surface area of the molded plastic member. It also includes a shoulder that interlocks with either the manhole cone, the catch basin cone, or with other stackable molded plastic members. The extension also contains a planer support surface which provides rigidity and support, and provides a surface for caulking to be applied to form a watertight seal.

REFERENCES:
patent: 2593918 (1952-04-01), Redman
patent: 4187647 (1980-02-01), Hall
patent: 4188151 (1980-02-01), Hall
patent: 4236358 (1980-12-01), Bowman
patent: 4408421 (1983-10-01), Pai
patent: 4690584 (1987-09-01), LeBaron
patent: 4834574 (1989-05-01), Bowman
patent: 4976568 (1990-12-01), Hess
patent: 5030030 (1991-07-01), Simmonds
patent: 5051022 (1991-09-01), Bowman
patent: 5205668 (1993-04-01), Adams

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