Patents by Inventor Robert E. Hansford

Robert E. Hansford 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).

  • Helicopter rotors
    Patent number: 5100294
    Abstract: A flexible beam type helicopter rotor includes restraining means outboard of a snubber means and connected between the flexible beam and a torque tube to increase the stiffness of the rotor in the lead/lag plane as applied pitch is increased.
    Type: Grant
    Filed: September 24, 1990
    Date of Patent: March 31, 1992
    Assignee: Westland Helicopter Limited
    Inventors: Mark A. Crannage, Robert E. Hansford, Frederick J. Perry