Patents by Inventor John Eller

John Eller 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 rotor seal assembly
    Patent number: 5641269
    Abstract: A helicopter rotor seal for gas-driven helicopters wherein the rotor is rotatably driven by a compressed air jets at the tips of the rotors directed rearwardly with respect to rotor rotation. A non-rotatable mast extends vertically from the helicopter fuselage including a concentric bore for communication of compressed air therethrough. Positioned at the upper extremity of the mast, above the rotor blades, is a rotatable plenum for distributing compressed gas to the helicopter's respective rotor blades.
    Type: Grant
    Filed: May 30, 1995
    Date of Patent: June 24, 1997
    Assignee: Royal Aviation
    Inventor: John Eller