초록 ▼

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 th

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.

대표청구항 ▼

A manhole joint gasket assembly for use in joints where pipe is sealingly joined to a manhole through a hole in the wall of the manhole, the assembly including a gasket constructed of rubber-like material and comprising an outer generally radially disposed flange portion of generally ring-like shape

A manhole joint gasket assembly for use in joints where pipe is sealingly joined to a manhole through a hole in the wall of the manhole, the assembly including a gasket constructed of rubber-like material and comprising an outer generally radially disposed flange portion of generally ring-like shape for engagement with a manhole wall, and an inner longitudinally extensive sleeve portion; said sleeve portion being joined at its one end to said flange portion and having a free opposite end remote from said flange portion; with the inner periphery of the opposite end of said sleeve portion being of a smaller dimension than the inner periphery of the said one end of said sleeve portion; with at least said sleeve portion being resiliently stretchable at its said opposite end for receiving a pipe therein of larger periphery than the inner periphery of the said opposite end of said sleeve, and wherein said opposite end of said sleeve is provided with a thickened bead portion around its periphery, substantially thicker than the wall thickness of an adjacent said sleeve portion, and including a separate resiliently stretchable ring constructed of rubber-like material disposed about said sleeve portion adjacent to said bead portion.