Patents by Inventor Francis L. Thornburg

Francis L. Thornburg 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).

  • Patent number: 5538202
    Abstract: A hydraulic actuation system for an aircraft control surface such as an elevon. A pair of spaced pivot points are provided to alternately rotate the control surface either clockwise or counterclockwise.
    Type: Grant
    Filed: November 2, 1993
    Date of Patent: July 23, 1996
    Assignee: Northrop Grumman Corporation
    Inventor: Francis L. Thornburg
  • Patent number: 4852456
    Abstract: A radar decoy ribbon packed within a dispenser body is launched from an aircraft by creating, within a launch tube, gas pressure sufficient to expel a frangible retaining plug from the outer end of the tube, driving the dispenser body into the airstream. The body has a pair of drag vanes which open in the air stream. As the dispenser recedes from the craft, the ribbon, one end of which is attached to the aircraft by a towline, is paid out of the body. Once the ribbon is fully deployed, a drogue maintains tension on the ribbon until the towline is severed.
    Type: Grant
    Filed: October 26, 1988
    Date of Patent: August 1, 1989
    Assignee: Northrop Corporation
    Inventor: Francis L. Thornburg
  • Patent number: 4180222
    Abstract: An improved control system for the aileron segment of a combined flap and aileron (flaperon) wherein the flaperon, supported, extended and retracted by conventional means, is described. It consists of a splined shaft rotatably mounted on an aircraft wing, its longitudinal axis being substantially aligned with the extension and retraction path of the flap. A transfer gear box slidably engages the splined shaft and is supported by a roller assembly engaging a support track which is mounted in the wing and runs substantially parallel to the splined shaft. The transfer gear box incorporates gears to transfer rotation of the splined shaft, via a second angularly adjustable shaft, to an aileron segment rotation mechanism located on the flaperon at the axis of rotation of the aileron segment.
    Type: Grant
    Filed: December 27, 1976
    Date of Patent: December 25, 1979
    Assignee: Lockheed Aircraft Corporation
    Inventor: Francis L. Thornburg
  • Patent number: 4067286
    Abstract: A hydro-ski craft in which load alleviation is attained by reducing the effective wetted area of the planing surfaces at high speeds, and in which elongated flaps extending longitudinally of the craft are mounted to swing about longitudinal axes between generally horizontal planing positions and upwardly swung retracted positions. Spray control dams may be carried by the flaps to themselves automatically swing between inactive and active positions in response to upward swinging movement of the flaps.
    Type: Grant
    Filed: February 18, 1975
    Date of Patent: January 10, 1978
    Assignee: Lockheed Aircraft Corporation
    Inventors: Ernest G. Stout, Francis L. Thornburg
  • Patent number: 3998176
    Abstract: A ski-type water borne craft adapted to plane along the surface of a body of water and having two stabilizing elements spaced laterally apart and mounted for upward and downward movement relative to one another in a relationship providing roll forces and giving lateral stability to the craft, with the stabilizing elements preferably being a pair of swinging flaps hinged to the after ends of two vertically shiftable hydroskis.
    Type: Grant
    Filed: February 18, 1975
    Date of Patent: December 21, 1976
    Assignee: Lockheed Aircraft Corporation
    Inventors: Ernest G. Stout, Francis L. Thornburg
  • Patent number: RE31563
    Abstract: A hydro-ski craft in which load alleviation is attained by reducing the effective wetted area of the planing surfaces at high speeds, and in which elongated flaps extending longitudinally of the craft are mounted to swing about longitudinal axes between generally horizontal planing positions and upwardly swung retracted positions. Spray control dams may be carried by the flaps to themselves automatically swing between inactive and active positions in response to upward swinging movement of the flaps.
    Type: Grant
    Filed: May 4, 1982
    Date of Patent: April 24, 1984
    Assignee: Lockheed Corporation
    Inventors: Ernest G. Stout, Francis L. Thornburg