Patents Assigned to Forval S.A.
  • Valve housings made from steel, especially for gate valves
    Patent number: 4243204
    Abstract: A valve housing made from steel, especially for gate valves, has a central housing part provided in opposite walls with frustoconical openings tapering in outward direction and being aligned along a common axis and a pair of connecting sockets having inner chamfered end faces of the same cone angle as the aforementioned openings and aligned along the common axis with the latter.
    Type: Grant
    Filed: February 21, 1979
    Date of Patent: January 6, 1981
    Assignee: Forval S.A.
    Inventor: Walter Siepmann