Matches 1 - 14 out of 14


Match Document Document Title
7762776 Vortex shedding cyclical propeller  
A propeller having one or more blades eccentrically mounted to a shaft dynamically changes the blade pitch to produce free vortices in a fluid. For extracting energy from a moving fluid, the fluid...
6932296 Cycloidal VTOL UAV  
A system and method for moving an aerial vehicle along a flight path includes rotatable hubs mounted on opposite sides of the vehicle. Elongated airfoils are mounted on the hubs parallel to a...
6227483 Wing movement for ornithopters and apparatus of the like  
The wing movement has a gearbox, a reference gear extending through the gearbox and being movably mounted to the gearbox, an input shaft extending through the reference gear and into the gearbox...
5265827 Paddle wheel rotorcraft  
An aircraft having vertical takeoff and landing capability having at least first and second laterally extending paddle wheels rotatable on a central axis generally perpendicular to the...
4527757 Lift generating mechanism for an aircraft  
A lift generating mechanism includes a plurality of airfoils each having first and second end surfaces, first and second side surfaces, and a centerline extending between the first and second side...
4210299 Propulsive lifting rotors  
A propulsive lifting rotor for an aircraft comprises two wings pivotally mounted about axes parallel to their leading edges. The wings (rotary airfoils) are located at respective sides of a plane...
4166595 Variable lift advancing wing aircraft  
An aircraft comprised of a pair of spaced apart interconnected air-frame members and a cargo compartment supported therewithin is provided with a plurality of expansible airfoils mounted for...
4113205 Aerodynamic lifting mechanisms  
An aerodynamic lift mechanism comprises a plurality of aerofoils mounted on two continuous toothed belts which are driven by toothed pulleys. A lever connects each aerofoil to a continuous member...
3938759 Special aircraft using a novel integrated lift, propulsion and steering system  
An aircraft having a body on which is mounted an integrated lift, propulsion and steeing system inclusive of cycloidal propellers having horizontal axes of rotation capable of developing net...
3321022 Rotary wing assembly  
3291236 Ground effect machine  
3161376 Ornithopter type aircraft  
2990139 Airship with feathering paddle wheels  
2966317 Paddle wheel sustained aircraft  

Matches 1 - 14 out of 14