Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1980-12-17
1982-09-21
Ward, Jr., Robert S.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277 343, 277153, 277166, 285110, 285230, 285345, F16J 1510, F16J 1546
Patent
active
043503519
ABSTRACT:
A connection between a pipe (principally sewer pipe) and the wall of a manhole or like structure, whereby a hole passing through the wall of the manhole is provided with an embedded gasket which, without the presence of a pipe, is more closed in inner circumference inwardly of the manhole than at the location of its embedment in the manhole wall, such that when a pipe is inserted into the gasket, its opening stretches, and in stretching does so at a location along the inwardly-extending sleeve of the gasket that is farthest into the manhole, for tight sealing engagement around the pipe. An integral bead, comprising part of the gasket forms a pressure ring, for increased sealing engagement with the pipe. An additional ring is provided outwardly of the gasket sleeve, also disposed against the integral bead, and optionally adhesively secured thereto, for additional sealing engagement with the pipe, and the additional ring is compressible for compressed engagement between the gasket sleeve and the manhole wall, for further tight sealing against the pipe. The compressible ring is originally hollow, and may optionally be provided with a preferrably liquid-like sealant therein, that provides an additional pressure inwardly of the ring, for further sealing engagement.
REFERENCES:
patent: 3084944 (1963-04-01), Stucke
patent: 3744806 (1973-07-01), Keyser
patent: 3787061 (1974-01-01), Yoakum
patent: 3973783 (1976-08-01), Skinner et al.
patent: 3982777 (1976-09-01), Martin
patent: 4018461 (1977-04-01), Bram
patent: 4044443 (1977-08-01), Chartet
patent: 4073048 (1978-02-01), Ditcher
patent: 4103901 (1978-08-01), Ditcher
patent: 4202555 (1980-05-01), Becker et al.
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