Patents Assigned to Dobson Park Industries P/C
  • Valves
    Patent number: 4583709
    Abstract: An electrically operated valve assembly comprises a valve, an electrical device 18 to operate the valve in one direction, and means 19 to prevent reverse current flow if the valve should drive the electrical device in reverse when the valve moves in a direction opposite to the said one direction. In the embodiment shown the valve has a plunger controlled by a cam, the cam being driven by a motor 18. The valve may however also be controlled by a solenoid.
    Type: Grant
    Filed: June 14, 1984
    Date of Patent: April 22, 1986
    Assignee: Dobson Park Industries P/C
    Inventor: Richard Ward