Patents by Inventor Frederic H. Schmitz

Frederic H. Schmitz 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).

  • Rotorcraft blade-vortex interaction controller
    Patent number: 5437419
    Abstract: Blade-vortex interaction noises, sometimes referred to as "blade slap", are avoided by increasing the absolute value of inflow to the rotor system of a rotorcraft. This is accomplished by creating a drag force which causes the angle of the tip-path plane of the rotor system to become more negative or more positive.
    Type: Grant
    Filed: November 6, 1992
    Date of Patent: August 1, 1995
    Assignee: The United States of America as represented by the United States National Aeronautics and Space Administration
    Inventor: Frederic H. Schmitz