Patents by Inventor Paul J. Madej

Paul J. Madej 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).

  • Propulsive anti-torque system for rotorcraft
    Patent number: 7731121
    Abstract: A rotorcraft having an enhanced configuration in which a simple wing and a propulsive anti-torque system are combined is disclosed. The propulsive anti-torque system includes an anti-torque thruster system in which a variable pitch fan is installed internal to the tail boom of the rotorcraft and an anti-torque thruster nozzle is mounted at the extremity of the tail boom. The fan is driven directly from the main rotor drive. The configuration and location of the fan allows the primary exhaust from the engine to be mixed with the compressed air flow from the fan. The mixed air flow from the fan and the engine passes through the tail boom and out the thruster nozzle.
    Type: Grant
    Filed: September 28, 2004
    Date of Patent: June 8, 2010
    Assignee: Bell Helicopter Textron Inc.
    Inventors: Dudley E. Smith, Walter C. Joiner, Paul J. Madej, Charles L. Hollimon, Daniel B. Robertson