Patents Assigned to Holland Bergen op Zoom B.V. Machinefabriek en/IJzergieterij
  • Butterfly valve
    Patent number: 4313592
    Abstract: A butterfly valve includes an annular valve seat and a disc-like valve member mounted both for rotation about an axis parallel to the valve seat and for axial displacement relative to the seat. The actuating mechanism automatically effects sequential motion of the valve member, first to rotate it to closed position and to shift it into sealed engagement against the valve seat, and vice versa, and includes structure which self-locks in the latter position.
    Type: Grant
    Filed: November 21, 1980
    Date of Patent: February 2, 1982
    Assignee: Holland Bergen op Zoom B.V. Machinefabriek en/IJzergieterij
    Inventor: Hendrik B. Baas