Patents by Inventor Arthur L. Sivigny

Arthur L. Sivigny 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).

  • Shutdown monitor for a helicopter pitch bias actuator
    Patent number: 4528628
    Abstract: An improved PBA shutdown monitor circuit senses collective pitch control position rate of change magnitude and inhibits PBA shutdown in response to the continuous presence of sensed magnitude within a range of selected collective pitch rate magnitudes bounded by a slow rate limit signal value and a fast rate limit signal value.
    Type: Grant
    Filed: December 6, 1982
    Date of Patent: July 9, 1985
    Assignee: United Technologies Corporation
    Inventors: William C. Fischer, Don L. Adams, Stuart C. Wright, David J. Verzella, Arthur L. Sivigny