Patents Assigned to Royal Aviation
  • 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