Patents by Inventor Dana Duffin

Dana Duffin has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Irrigation systems including flush valves, and methods for flushing debris from irrigation systems
    Patent number: 7766262
    Abstract: Valves for use in irrigation systems include a moveable sealing member disposed within a valve body. The moveable sealing member is configured to close automatically the valve when the magnitude of a pressure differential between the inlet and the outlet of the valve body reaches a predetermined threshold value and to open automatically the valve when the magnitude of the pressure differential falls below the predetermined threshold value. Irrigation systems include such valves and methods for flushing debris out of the irrigation systems using such valves.
    Type: Grant
    Filed: May 14, 2007
    Date of Patent: August 3, 2010
    Inventors: Barton W. Gillespie, Dana Duffin
  • FLUSH VALVES, IRRIGATION SYSTEMS INCLUDING FLUSH VALVES, AND METHODS FOR FLUSHING DEBRIS FROM IRRIGATION SYSTEMS
    Publication number: 20080283637
    Abstract: Valves for use in irrigation systems include a moveable sealing member disposed within a valve body. The moveable sealing member is configured to close automatically the valve when the magnitude of a pressure differential between the inlet and the outlet of the valve body reaches a predetermined threshold value and to open automatically the valve when the magnitude of the pressure differential falls below the predetermined threshold value. Irrigation systems include such valves and methods for flushing debris out of the irrigation systems using such valves.
    Type: Application
    Filed: May 14, 2007
    Publication date: November 20, 2008
    Inventors: Bart Gillespie, Dana Duffin