External manhole seal

Details External manhole seal External manhole seal

1982-08-19

1984-05-22

Smith, Robert I.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277212FB, 285226, F16J 1510, E02D 2914

Patent

active

044497156

ABSTRACT:
An external manhole sealing assembly comprising a flexible sleeve spanning the joint between a manhole frame and a manhole casing, a frame adapter for forming a sealing surface for said sleeve, the sleeve being secured to the sealing surface on the adapter and to the manhole casing by mounting bands, the sleeve including sufficient flexibility to allow for heaving of the frame with respect to the casing.

REFERENCES:
patent: 3549176 (1970-12-01), Contresas
patent: 3669470 (1972-06-01), Deurloo
patent: 4278262 (1981-07-01), Mizutani et al.
patent: 4345772 (1982-08-01), Woody et al.
patent: 4368893 (1983-01-01), Gagas

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