Water lock method and apparatus

Details Water lock method and apparatus Water lock method and apparatus

1991-09-10

1994-04-05

Dorner, Kenneth J.

Road structure, process, or apparatus

Pavement

Vault cover-closure

52 20, E02D 2914

Patent

active

052998843

ABSTRACT:
A watertight chimney assembly prevents infiltration of water in the region between a manhole cover support frame and a concrete manhole assembly. The watertight chimney, in one embodiment, is comprised of a pair of tubular telescoping sleeves each provided with a flange for mounting respectively to and between the top lip of a manhole assembly and the bottom surface of a flange on the cover support frame supported a desired distance above the top of the manhole assembly to maintain the cover frame at proper grade. An O-ring seated within an annular groove provided in one of the tubular sleeves provides a sliding watertight seal therebetween. The sleeve flanges are arranged and compressed between the cover support frame and manhole assembly and contribute to the watertight seal. One of the sleeves is reversible to increase the telescoping range between a minimum and a maximum extension. In an alternative embodiment, the internal surface of the manhole opening constitutes one of the telescoping members. A sealing gasket may be arranged on either of the two telescoping members and may be seated within a groove or clamped against the manhole opening. The sealing gasket may be any one of a variety of cross-sectional configurations and can be inflatable, if desired. As another alternative embodiment, an anchoring flange of one of the telescoping sleeves may be embedded into the manhole opening. The cast-in sleeve may be formed of a resilient material and is clamped to the cooperating telescoping member.

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Neenah Foundry Company, 1992 Catalog, p. 70.

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