Aircraft with a ducted fan in a circular wing
Patent 5303879 Issued on April 19, 1994. Estimated Expiration Date: 
January 26, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
January 26, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 1959270 2717131 2843339 2989269 3049320 3282534 3335977 Flight vehicle Aircraft Vertical/short take-off and landing aircraft InventorAssigneeApplicationNo. 009246 filed on 01/26/1993US Classes:244/23C, Circular configuration244/12.2, Circular244/23B, Dual propulsion means, horizontal and vertical244/23D, Thrust diverters244/45A, Canard244/82, Vane operatedD12/319AIRCRAFT, SPACECRAFT, OR FUSELAGEExaminersPrimary: Bucci, David A.Assistant: Ansley, Virna Lissi Attorney, Agent or FirmInternational ClassesB64C 029/00B64C 039/06 Foreign Application Priority Data1992-01-29 CHAbstractThe aircraft comprises a rotor with a vertical axis arranged in a housing for generating a lift exceeding the weight of the aircraft. The housing is essentially shaped as a circular wing. A first way of guiding air is provided for controlling the air stream generated by the rotor, by means of which the position of the aircraft can be controlled in hovering flight. From hovering flight, the aircraft can be moved into a cruise flight, where the lift of the aircraft is generated aerodynamically by the circular wing of the housing and its forward thrust by a propeller. For the transition between hovering flight and cruise flight, a second way of guiding air is provided for controlling the pitch of the aircraft. The structure for the second way of guiding air is arranged outside a zone defined by the air stream of the rotor.Field of SearchAirplane and helicopter sustainedTail sitters Rotary wing Airplane and cylindrical rotor sustained Airplane and fluid sustained Circular Thrust tilting With thrust diverting Channel wing Dual propulsion means, horizontal and vertical Circular configuration Thrust diverters Body encircling Vane operated Canard | |
