Aeronautics and astronautics – Aircraft – heavier-than-air – Helicopter or auto-rotating wing sustained – i.e. – gyroplanes
Reexamination Certificate
2004-11-26
2008-10-21
Dinh, Tien (Department: 3644)
Aeronautics and astronautics
Aircraft, heavier-than-air
Helicopter or auto-rotating wing sustained, i.e., gyroplanes
C244S017110
Reexamination Certificate
active
07438260
ABSTRACT:
A vertical take-off aircraft is disclosed. Looking at the aircraft it can be seen that the aircraft consists of a main rotor assembly1at the top of the aircraft which consists of an assembly of blades2, 3and a rotor4. Rotation of the main rotor assembly1is achieved by using an engine assembly5. The main engine assembly is connected to the main body6of the aircraft by a tilt enabling joint7. The tilt enabling joint7allows tilting of the main engine5relative to the main body6of the aircraft to occur in a controlled manner during flight. A universal joint8is used to allow tilting to occur. The tilt enabling joint7is fitted with a combination of hydraulic actuators9, 10and springs11, 12and13that allow the tilting of the tilt enabling joint7to be controlled. When the main engine5is tilted, the main rotor assembly1is tilted with it. Tilting of the main engine assembly5thus initiates changes in the direction of travel of the aircraft without the need to change the pitch angles of the blades2and3. To counter the rotational force exerted on the main body6of the aircraft by the rotation of the main rotor assembly1, an additional engine assembly15is attached to the main body aircraft, which rotates a secondary rotor assembly16. The secondary rotor assembly consists of blades17and18, and a rotor19. Rotation of the secondary rotor assembly pushes air in a primarliy horizontal direction by way of the pitch of the blades17and18.
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