Aircraft, having a pair of counter rotating rotors
Patent 5064143 Issued on November 12, 1991. Estimated Expiration Date: 
April 6, 2010. 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.
April 6, 2010. 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 2461435 2777649 2863621 2880945 3395876 3397852 3437290 3599901 InventorAssigneeApplicationNo. 505787 filed on 04/06/1990US Classes:244/23C, Circular configuration244/12.2, Circular244/12.3, Dual propulsion244/23BDual propulsion means, horizontal and verticalExaminersPrimary: Peters, Joseph F. Jr.Assistant: Ellis, Christopher P. Attorney, Agent or FirmForeign Patent References
International ClassB64C 029/00Foreign Application Priority Data1989-04-19 CHAbstractThe aircraft has a pair of rotors driven to counter-rotate within a housing. The housing has adjustable air guiding discuss for the rotor stream and a airfoil-like outer shape to generate lift at horizontal flight. The air guiding devices include a circular arrangement of a plurality of individual sectors having tangentially extending blades arranged in a zone below the rotors. In each sector the blades are adjustable in their position relative to the rotor stream. In at least some of the sectors, the blades are arranged in pairs for an adjusting movement in opposite relative sense. The air guiding devices allow precise and easy control of the aircraft maneuvers. | |
