Patents by Inventor Vas H. Brogdon

Vas H. Brogdon 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).

  • Bearingless tail rotor for helicopters
    Patent number: 4306837
    Abstract: A helicopter tail rotor structure includes a thin, flat, tension-bearing strap of fibers extending spanwise, and is to be centrally secured by a hub to a helicopter tail mast. Flex sections are formed inboard of substantially equally divided portions of said fibers which extend as top and bottom blade spars from the outboard margins of the flex sections. Preferably, the planes of the flex sections and the planes of the spars are oriented at predetermined nose-up twist angles, one relative to the other.
    Type: Grant
    Filed: April 24, 1979
    Date of Patent: December 22, 1981
    Assignee: Textron, Inc.
    Inventors: Vas H. Brogdon, Cecil E. Covington, Richard E. Wheelis
  • Laminated composite rotor yoke
    Patent number: 4293276
    Abstract: A rotor yoke (10) for coupling helicopter blades to a rotatable support mast (12) utilizes a novel laminated construction. Layers (30) of unidirectional fibers and layers (32) of bias ply fibers are arranged in alternating sequence to form an elongate loop structure. At least some of the bias ply layers (32) extend between the sides of the loop to form a transverse central section (20). Further, at least some of the bias ply layers (32) include gaps to provide flexure areas (24) in the sides of the yoke (10).
    Type: Grant
    Filed: October 27, 1978
    Date of Patent: October 6, 1981
    Assignee: Textron Inc.
    Inventors: Vas H. Brogdon, David L. Williams