Patents by Inventor Ronald L. Kisor

Ronald L. Kisor 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).

  • Publication number: 20130015289
    Abstract: A control system having a first loop configured to provide a longitudinal blowback value of a rotor blade during flight and a second loop associated with the first loop, the second loop being configured to provide a design maximum total flapping value and a lateral flapping value. A method includes calculating a flight control limit from the design maximum total flapping value and the lateral flapping value. An upper longitudinal cyclic control limit is calculated by adding the flight control limit to the longitudinal blowback value. A lower longitudinal cyclic control limit is calculated by subtracting the flight control limit from the longitudinal blowback value.
    Type: Application
    Filed: September 2, 2011
    Publication date: January 17, 2013
    Inventors: Robert L. Fortenbaugh, Jose M. Rodriquez, Ronald L. Kisor, Robert Blyth
  • Patent number: 7004426
    Abstract: A flight control system for a rotorcraft to prevent the adverse effects of the vortex ring state is disclosed. In the flight control system of the present invention, selected control inputs are sent the rotorcraft prior to the onset of the vortex ring state. In the preferred embodiment, the control inputs are transient, do not require input from the pilot, and do not affect the flight path of the rotorcraft.
    Type: Grant
    Filed: March 1, 2005
    Date of Patent: February 28, 2006
    Assignee: Bell Helicopter Textron Inc.
    Inventor: Ronald L. Kisor
  • Patent number: 6880782
    Abstract: A flight control system for a rotorcraft to prevent the adverse effects of the vortex ring state is disclosed. In the flight control system of the present invention, selected control inputs are sent the rotorcraft prior to the onset of the vortex ring state. In the preferred embodiment, the control inputs are transient, do not require input from the pilot, and do not affect the flight path of the rotorcraft.
    Type: Grant
    Filed: May 6, 2003
    Date of Patent: April 19, 2005
    Assignee: Bell Helicopter Textron Inc.
    Inventor: Ronald L. Kisor