Patents by Inventor Gordon E. Atkinson

Gordon E. Atkinson 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).

  • Drip irrigation system
    Patent number: 4190206
    Abstract: A drip irrigation system which includes a flow control valve having an inlet opening which constricts in response to pressure increases to provide a uniform flow despite pressure variations. The inlet opening of the valve has a rectangularly cross-sectioned central section and end sections which are non-rectangular, such as triangular or semi-circular, in cross section. During normal flow conditions the rectangular central section of the inlet opening is pressed closed and irrigation liquid flows at a constant rate through the two end sections.
    Type: Grant
    Filed: June 30, 1978
    Date of Patent: February 26, 1980
    Assignee: Vernay Laboratories, Inc.
    Inventors: Gordon E. Atkinson, Kenneth C. Tregillus