Abstract: Improvements in the technique of sliplining a buried pipe, so as to minimize adverse affects of differences in expansion and contraction of the old and new pipe, while maintaining seals at the ends thereof is disclosed employing at each pipe end a sleeve-like pliable gasket, which is expanded outwardly into contact with the inner surface of the old pipe, and somewhat beyond the end of the old pipe, is contracted inwardly into contact with the other surface of the new or sliplined pipe. The sleeve-like gasket can compensate for thermally induced pipe line and liner axial length changes, without breaking the seal between the two, while seal installation is facilitated by the accessability of the sleeve-like gaskets extending beyond the ends of the old pipe.

Abstract: Improvements in the technique of sliplining a buried pipe, so as to minimize adverse affects of differences in expansion and contraction of the old and new pipe, while maintaining seals at the ends thereof is disclosed employing at each pipe end a sleeve-like pliable gasket, which is expanded outwardly into contact with the inner surface of the old pipe, and somewhat beyond the end of the old pipe, is contracted inwardly into contact with the other surface of the new or sliplined pipe. The sleeve-like gasket can compensate for thermally induced pipe line and liner axial length changes, without breaking the seal between the two, while seal installation is facilitated by the accessability of the sleeve-like gaskets extending beyond the ends of the old pipe.

Abstract: This invention relates to a gasket apparatus for providing a fluid tight seal between a pipe and a porthole in the wall of a manhole riser. The gasket is in the form of an elongated sleeve of elastomeric material having at one end an outwardly turned, reflexly curved annular flange. The body portion extends axially beyond the flange. An annular recess is provided in the inner surface of the flange and another annular recess is provided on the outer surface of the body portion at the opposite end thereof. The flange and body portion are made sufficiently flexible that they can be turned inside out to form a tubular shape with the two recesses on the outer circumference thereof.The recess in the flange is so formed as to receive in coaxial relation a rigid reinforcing ring.

Abstract: This invention relates to a gasket apparatus for providing a fluid tight seal between a pipe and a porthole in the wall of a manhole riser. The apparatus includes an elongated sleeve of elastomeric material, the sleeve having at one end an outwardly turned, reflexly curved annular flange. The body portion extends axially beyond the flange. A rigid reinforcing ring coaxially engages the inner surface of the flange, forming said flange to a predetermined outside diameter. This apparatus is inserted into the porthole in coaxial sealing relationship therewith. The flange is radially compressed between the ring and the wall of the porthole thereby providing a seal. The end of the pipe is received by the sleeve which is clamped at the distal end thereof onto the pipe to provide a further seal.The method of forming the seal includes inserting a solid, substantially rigid ring into the end portion of an elastomeric elongated sleeve which thereby determines the outer diameter of the sleeve radially opposite the ring.

Abstract: A two part sleeve gasket is provided for sealing between a pipe and a hole receiving the pipe, such as a porthole in a manhole. The gasket includes a first annular element of resilient elastomeric material having a generally tubular body portion and an outwardly, reflexly curved flange radially spaced therefrom. The flange is generally tubular and shorter in length than the body portion. A second annular element resembling an O-ring of elastomeric material surrounds the body portion in the radial space defined by the flange, the flange being radially flexible into engagement with the wall of the hole and the second annular element being elastically deformable upon being radially compressed between the flange and the body portion. The invention also comprehends the method of installing the aforesaid gasket.

Abstract: This invention relates to a pipe joint sealing device. The device includes an annular resilient body of rubber which is generally V-shaped in cross-section which defines inner and outer annular flanges or body portions. This annular body or rubber ring is fitted into the opening of a rigid concrete structure, such as a manhole, in fluid-type engagement therewith. This engagement is interlocking which prevents the accidental dislodgement of the rubber ring from the opening, and is achieved b casting the concrete into lockingengagement with the outer peripheral surface of the ring, this ring being provided with an annular anchor portion which in cross-section is of keystone shape.