Manhole sealing assembly

Details Manhole sealing assembly Manhole sealing assembly

1991-11-07

1993-08-31

Britts, Ramon S.

Road structure, process, or apparatus

Pavement

Vault cover-closure

52 20, E02D 2914

Patent

active

052403459

ABSTRACT:
An external manhole sealing assembly for sealing the joint to a manhole frame and a manhole casing which includes a resilient sleeve mounted on the manhole frame and the manhole casing to span the joint between the frame and casing, the sleeve is secured to a flexible ring which is mounted on the flange of the manhole frame and a second band encircling the sleeve on the manhole casing, the manhole frame being raised above the manhole casing a predetermined distance prior to sealing the sleeve to the manhole casing so that a bulge is created in the sleeve when the manhole frame is seated on the manhole casing, the bulge allowing for heaving of the manhole frame without destroying the joint seal.

REFERENCES:
patent: 4345772 (1982-08-01), Woody et al.
patent: 4387903 (1983-06-01), Smith
patent: 4449715 (1984-05-01), Gagas
patent: 4919564 (1990-04-01), Neatherly et al.
patent: 4927163 (1990-05-01), Gagas
patent: 4995757 (1991-02-01), Prescott
patent: 5046886 (1991-09-01), Muir et al.
patent: 5062735 (1991-11-01), Gaudin
patent: 5094894 (1992-03-01), Schafferus et al.

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