Patents Assigned to Georg Fischer N.V.
  • Patent number: 5314213
    Abstract: A pipe coupling, comprising a sleeve having at least one end adapted for the insertion of a pipe and being provided with a substantially conically shaped supporting surface for a sealing ring. A compression ring is provided by which the sealing ring may be compressed around the pipe. The sealing ring is composed of a circumferentially compressible, but in cross section rather undeformable annular core, which is more particularly bent of a helical body having substantially circular windings, and a sheath of elastomeric material which forms the actual seal. The sheath completely encloses the annular core both cross sectionally and circumferentially. The supporting surface has a progressively decreasing diameter in the pressing direction.
    Type: Grant
    Filed: February 1, 1993
    Date of Patent: May 24, 1994
    Assignee: Georg Fischer N.V.
    Inventors: Aloisius H. M. Heister, Andreas J. L. Nijsen