Patent ID: 6089618
Filing Date: 2000-07-18
Classification: B28B,F16L

Abstract:
A sealing device for sealing an annular space between two pipes, one of the pipes (2) consisting of a hardenable material and forming a socket (4) formed with a substantially cylindrical inner surface (6) and the other pipe forming a spigot end axially introducable into the socket and formed with a substantially cylindrical outer surface, the sealing device comprising a sealing ring (10) consisting of elastic material having a sealing portion (18) for sealing the annular space and comprising an annular element (12) connected with the sealing ring and consisting of non-elastic cellular plastic, the sealing device being adapted to be positioned on a substantially cylindrical mould part in a mould for moulding the pipe provided with the socket and for moulding the sealing device into the socket at the cylindrical inner surface thereof with the sealing ring positioned adjacent the free end of the socket and the annular element positioned axially inside the sealing ring, the annular element (12) consisting essentially of non-elastic cellular plastic formed with recesses (22) positioned at the inner surface of the annular element for allowing a radial expansion of the inner surface of the annular element under the influence of the spigot end introduced into the socket under the influence of the deformation of the sealing portion (18) of the sealing ring.