Patents by Inventor James R. Aaron

James R. Aaron 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).

  • Low-noise nozzle valve
    Patent number: 4957139
    Abstract: A low-noise, variable discharge area, valve (10) is constructed having opposed recesses (46, 48) within which a pair of gates (42, 44) are slidably disposed. Each of the gates (42, 44) is provided with upstream edges (50) having a radius thereon, the radius enabling smooth, accelerated, low-noise flow therebetween. The gates (42, 44) are further provided with tracks (62, 64) along each side, which in turn slide along splines (66) set in side walls (54, 55) of the valve (10). A threaded rod (80) which rotates in a threaded insert (82) in a rear wall of each of the gates (42, 44) serves to move the gates within their respective recesses.
    Type: Grant
    Filed: September 7, 1989
    Date of Patent: September 18, 1990
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: Hal S. Gwin, James R. Aaron