Patents by Inventor Alvin R. Womac

Alvin R. Womac 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).

  • Variable flow control device for precision application
    Patent number: 5908161
    Abstract: The present invention relates to an apparatus for variable flow control for precision applications, such as agrochemical applications. The invention is directed towards a flow control device comprising a metering rod moveably mounted within a housing. The position of the metering rod is controllable so as to control the flow rate, flow angle and/or droplet size of fluid passing through the flow control device of the present invention.
    Type: Grant
    Filed: November 18, 1997
    Date of Patent: June 1, 1999
    Assignee: The University of Tennessee Research Corporation
    Inventors: Alvin R. Womac, Quy Duc Bui
  • Liquid injection system for sprayers
    Patent number: 5881919
    Abstract: The present invention is directed to a system for direct injection of chemicals or other additives in a liquid solution into a spray nozzle. The injection system of the present invention may be mounted adjacent, or in close proximity, to the spray nozzles of a sprayer. The present invention comprises a variable speed/stroke diaphragm pump capable of providing a double pumping action such that a liquid solution may be continuously pumped at a controllable rate to one or more spray nozzles of a sprayer.
    Type: Grant
    Filed: October 28, 1997
    Date of Patent: March 16, 1999
    Assignee: The University of Tennessee Research Corporation
    Inventors: Alvin R. Womac, Ray A. Maynard, II