Patents Assigned to Outotec Ojy
  • Valve for controlling slurry flow
    Patent number: 7461829
    Abstract: The invention relates to a seal to be used as a valve stem seal in a valve for controlling flows containing solid material such as slurry flows with an actuator. The seal is positioned outside of the valve body so that the inside of the seal and the valve body form an essentially closed space for the flow to be controlled.
    Type: Grant
    Filed: June 3, 2004
    Date of Patent: December 9, 2008
    Assignee: Outotec Ojy
    Inventor: Richard Rule