Patents by Inventor Donald William Hapke

Donald William Hapke 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).

  • Articulated nozzle for upper surface blown aircraft
    Patent number: 4030687
    Abstract: An exhaust nozzle used in conjunction with an upper surface blown aircraft for directing the exhaust gases from the aircraft engine over the wing and flap surfaces of the aircraft. The nozzle can occupy two positions. The first position, for use in cruise mode, directs the exhaust gases rearwardly in a normal manner. In the second position, used for takeoff and landing, the nozzle outlet area is slightly increased and the nozzle tilted to direct the exhaust gases rearwardly and downwardly across the wing and flap surfaces thereby increasing lift due to the Coanda effect.
    Type: Grant
    Filed: February 23, 1976
    Date of Patent: June 21, 1977
    Assignee: The Boeing Company
    Inventor: Donald William Hapke