Patents by Inventor James A. Loundagin

James A. Loundagin 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).

  • Digital flow control system
    Patent number: 4030523
    Abstract: A digital flow control system for testing ramjet engines that permits conl of fuel in steps, or percentages, of full flow rate. Four cavitating venturis connected to four valves control the flow rate through the valves such that the fuel flow rate is regulated in 10% increments of full flow rate depending upon the combination of valves which are open.
    Type: Grant
    Filed: April 19, 1976
    Date of Patent: June 21, 1977
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Robert E. Cram, Walter Gill, James A. Loundagin