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US 12,662,242 B2Granted
System, assemblies and methods for mechanical-thrust power conversion multifans
AssigneeN.M.B. Medical Applications Ltd
InventorsOren Globerman, Mordechay Beyar
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Abstract
A multi-rotor system for providing air thrust is disclosed comprising at least one multi-rotor assembly. The multi-rotor assembly comprising at least two rotors rotatable about a common axis wherein the outer radius of a first rotor is substantially similar to the inner radius of the second rotor. An airborne vehicle is also disclosed that is adapted to perform vertical takeoff and landing (VTOL). The airborne vehicle comprising at least two multi-rotor system disposed substantially symmetrically around the center of gravity of the vehicle.
Claims7
A multi-rotor system comprising:
- at least two concentric rotors rotatable about a common axis and disposed axially with respect to each other;
- wherein blades of different rotors of the at least two concentric rotors have the same inner radius and different outer radiuses;
- wherein the at least two concentric rotors are rotatable at different angular speeds with respect to each other;
- and
- wherein the angular speeds of the at least two concentric rotors are set so as to rotate blade tips of the at least two rotor rotors at substantially the same tangential speed.
2 more elements
Dependencies are inferred from the claim text.