Patents by Inventor Richard G. Dupree

Richard G. Dupree 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).

  • Geyser pump
    Patent number: 8371826
    Abstract: A geyser pump includes an air chamber having an air chamber interior, a generally U-shaped bubble-forming loop external to and disposed in fluid communication with the air chamber and a liquid delivery conduit disposed in fluid communication with the bubble-forming loop. A liquid recirculation/transfer system having an orifice disk assembly and a geyser pump is also disclosed.
    Type: Grant
    Filed: August 27, 2009
    Date of Patent: February 12, 2013
    Inventors: George E. Johnson, Richard G. Dupree
  • High clearance sliding vane pump
    Patent number: 5601423
    Abstract: A sliding vane air pump has a resilient flexible plate secured to the housing adjacent to one end of the rotor so that drawing a high vacuum flexes the plate closer to the rotor to further increase the vacuum attainable by the pump.
    Type: Grant
    Filed: October 2, 1995
    Date of Patent: February 11, 1997
    Assignee: Thomas Industries Inc.
    Inventors: Meredith W. Meece, William T. Thurmon, Richard G. Dupree