Class 244/34A - Annular airfoils

Subclass of Class 244 - Aeronautics and astronautics
No. of patents: 38
Last issue date: 12/06/2011

Number	Title	Issue Date
8070092	Noise-suppressing strut support system for an unmanned aerial vehicle A strut support system for a ducted fan unmanned aerial vehicle to suppress noise comprising: a ducted fan fuselage that defines an opening; an engine that extends longitudinally through the opening in the fuselage; a drive mechanism rotatably mounted to the engine,...	12/06/2011
7294036	Flying disc A circular planform wing includes a contiguous thin central plate having top and bottom surfaces. An outer annular rim encompasses the central plate. The rim has a lower edge defining a lower plane of the wing, and the central plate has an upper zone defining an upp...	11/13/2007
7267299	Aircraft An aircraft includes a fuselage with a circular airfoil body supported thereabove on a vertical drive shaft mechanism. The airfoil body includes an upper disk forming an upper surface of the body and a lower disk forming a lower surface of the body in which the uppe...	09/11/2007
7147183	Lift system for an aerial crane and propulsion system for a vehicle The present invention provides an improved lift system for an aerial crane incorporating a wing, coanda and curved surface. The arrangement of the wing, coanda and curved surface use and induce airflow to create additional lift through an increase in airflow mass, d...	12/12/2006
7100867	Lifting foil A lifting foil for an aircraft, a hydrofoil or the like having a pair of courses or wings. Vortex losses due to spanwise fluid flow are substantially reduced by joining the tips of the courses with flow guides configured for jointly terminating the undesired flows. ...	09/05/2006
7077358	Helicopter with torque-correcting thruster device A helicopter having a torque-correcting thruster device. The helicopter has an aerodynamic body which has opposite side portions, a top portion and a bottom portion. The aerodynamic body has a cockpit and a pilot seat in the cockpit. The helicopter includes landing ...	07/18/2006
6976653	VTOL micro-aircraft VTOL micro-aircraft comprising a first and a second ducted rotor mutually aligned and distanced according to a common axis and whose propellers are driven in rotation in mutually opposite directions. Between the two ducted rotors are positioned a fuselage and a wing...	12/20/2005
6691949	Vertical takeoff and landing aerial vehicle An aerial vehicle including a toroidal fuselage having a longitudinal axis, and a duct extending along the longitudinal axis between a leading edge and a trailing edge of the fuselage, first and second counter-rotating, variable pitch rotor assemblies coa...	02/17/2004
6669138	Rotary aeronautical lifting cell A rotary aeronautical lifting cell having an annular airfoil, airfoil dividers, and a propulsion mechanism. The airfoil dividers separate the annular airfoil into airfoil sections arranged in circular relationship. Upon rotation of the present aeronautica...	12/30/2003
6607162	Ring-wing aircraft A ring-wing aircraft suited particularly, although not exclusively, to use in micro-unmanned air vehicles (UAV's) with ring-wings. An aircraft (10) according to the invention comprises a ring-wing (11) defining a duct (16) with a longitudinally-extending ...	08/19/2003
6450446	Counter rotating circular wing for aircraft The present invention herein is a disc shaped wing comprised two disc segments, an inner disc assembly and an outer disc assembly, that counter-rotate to enable vertical take off and landing. The inner disc assembly has a plurality of flap blades that ope...	09/17/2002
6071363	Single-cast, high-temperature, thin wall structures and methods of making the same A single-cast, thin wall structure capable of withstanding impinging gases at temperatures of 4300° F. and higher, and method of making the same....	06/06/2000
5839690	Inertial acceleration aircraft An aircraft structured particularly, as a whole to improve its capacity for accelerating by the means of transforming stored motion of mass into translocational motion of the aircraft; the aircraft is structured particularly, as a whole, to improve its ca...	11/24/1998
5503352	Light-duty box-wing aeroplane A light-duty multipurpose aeroplane has a fuselage having a cabin at its center, a tail portion with a pusher propeller in a ring and a front portion with an all-swiveling horizontal "canard" type empennage. The wings of the aeroplane are articulated with...	04/02/1996
5503351	Circular wing aircraft A circular wing aircraft in the form of a helicopter comprising a fuselage and a circular wing assembly. A structure is for mounting the circular wing assembly above the fuselage in a stationary manner. An air impeller unit is rotatively carried within th...	04/02/1996
5351913	Coaxial transmission/center hub subassembly for a rotor assembly having ducted, coaxial counter-rotating rotors One embodiment of a coaxial transmission/center hub subassembly for a rotor assembly having ducted, coaxial counter-rotating rotors includes a single stage transmission, a transmission housing, and a center hub support structure that are structurally and ...	10/04/1994
5332177	Aircraft An aircraft capable of sustained flight including a fuselage and a spiral-formed flat-section right hand and left hand wing positioned in generally horizontally opposing relation along either side of the fuselage. Each wing is formed of an elongated flat ...	07/26/1994
5190242	Model jet helicopter with solid-circular rotor blade An elongate helicopter body including an orthogonally mounted rotatable and pivotally positionable rotor shaft fixedly mounting a solid, annular, convex blade member defined by a parabolic convex curve and terminating in an annular rim, wherein the rim is...	03/02/1993
5155992	Method and means for generating a force A method and means for generating a force. A flared body is enclosed in a shroud to form one or more ducts of axially diminishing cross-section for accelerating and directing the discharge of a fluid introduced into the ducts under pressure. A cambered va...	10/20/1992
5150857	Shroud geometry for unmanned aerial vehicles An unmanned aerial vehicle having a toroidal fuselage that surrounds a pair of coaxial, multi-bladed, counter-rotating rotors. The toroidal fuselage has an airfoil profile that is optimized to provide high hover efficiency and produce a pressure distribut...	09/29/1992
5119748	Sailing system employing radial force sail A radial force sail (22) for propelling land or water craft includes a continuously curved anhedral section (24) having its tip portions interconnected with substantially rigid, dihedrally disposed struts (26) and (28) that converge towards each other and...	06/09/1992
5086993	Airplane with variable-incidence wing The craft is for hovering flight, vertical takeoff and landing, and horizontal forward flight. It has a tail-sitting fuselage and a ducted fan mounted to the fuselage aft to provide propulsion in both (a) hovering and vertical flight and (b) horizontal fo...	02/11/1992
4967983	Airship A rigid airship is disclosed herein having an annular or toroidal airfoil fuselage in front elevation for housing several elongated gas cells containing a buoyant gas such as helium. The fuselage includes at least two longitudinal and a plurality of trans...	11/06/1990
4854907	"ESU" flying ring A flying ring of symmetrical cross section featuring a normal leading edge with triangular cross section. The triangle is isosceles and the sides of the triangle may be concave. As the ring is symmetrical, it may be used with "either side up"....	08/08/1989
4804155	VTOL aircraft A VTOL aircraft having a fuselage with fixed ring wings on either side thereof. Each ring wing has a rearwardly extending nacelle associated with it. Each nacelle has a ring tail empennage at its after end and a propulsor fan in its nose operating in the ...	02/14/1989
4790788	Aerial toy An aerial toy comprising a body having a leading edge and a trailing edge, and comprising a flexible, resilient, thin wall sail or airfoil extending forward from the trailing edge; a relatively thick, relatively rigid peripheral ring at the leading edge, ...	12/13/1988
4718320	Towed decoy system A towed decoy system is disclosed characterized by use of a rotating tow line spool having an axial bore therethrough adapted to receive a pyrotechnic charge adjacent one end thereof and communicate gas pressure upon detonation of the charge to the decoy ...	01/12/1988
4677928	Circular linked rotating foil assembly for vessels A sailing craft has a circular linked rotating structure mounted on a vertical support or mast and within the circular structure are a plurality of parallel thin foils. The entire circular structure may be rotated in two axes to achieve directional contro...	07/07/1987
4560358	Gliding ring A gliding ring toy comprised of a closed-figure airfoil with a narrow separator lip on the outer perimeter of the upper surface in order to balance the aerodynamic lift, fore and aft, over a wide range of velocities in gliding flight....	12/24/1985
4531323	Toy glider system A hand propelled air glider type aerodynamic toy. The toy includes an elongated fuselage, a nosepiece which acts as a balance weight, a flat plastic or styrofoam member with an offset cutout which acts as the wings of the device, and a wing adjuster which...	07/30/1985
4456265	Gliding ring A gliding ring toy comprised of an annular airfoil angled in order to compensate for air downwash effects and to balance the aerodynamic lift, fore and aft, in gliding flight....	06/26/1984
4436264	Flying device A kite or flying device comprising a substantially ring-shaped body member formed of foam plastic, the normally upper surface of said body member being flat, the normally lower surface of said body member being part of the surface of a sphere, the ring-sh...	03/13/1984
4390148	Rotary wing device A rotary wing device adapted to be rotated about its longitudinal axis and to be propelled forwardly with its longitudinal axis having a small upward pitch angle relative to the forward flight direction in order to generate an upward lifting force on the ...	06/28/1983
4307856	Annular wing An annular wing particularly suited for use in supporting in flight an aircraft characterized by the absence of directional stabilizing surfaces. The wing comprises a rigid annular body of a substantially uniformly symmetrical configuration characterized ...	12/29/1981
4248007	Flying toy A toss-type flying toy has at least one tubular aerodynamic member positioned adjacent the plane of a mid fuselage planar generally circular horizontal wing. The flying toy also includes a forwardly positioned horizontal circular lifter, upper and lower v...	02/03/1981
4037807	Flight vehicle A flight vehicle comprises a vehicle body with a duct having a longitudinal axis extending through the body, and a fan for inducing a flow of ambient air through the duct from an inlet end to an outlet end to provide a thrust acting along the axis of the ...	07/26/1977
3987981	Roll control for aircraft, particularly flying barrels, adapted to be driven by means of ducted fans This invention relates to an improvement in an aircraft driven by a ducted fan and having a displaceable louver at the end of the flow channel for vertical flight, hovering flight, transition, and high-speed flight, the improvement comprising a vertical s...	10/26/1976
3968944	Aircraft with shrouded propeller drive This invention relates to an improvement in an aircraft having a tail-mounted, shrouded pusher-type propeller and an engine mounted in front of the shroud, the improvement comprising exhaust pipe running from the engine to the shroud....	07/13/1976

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Class 244/34A - Annular airfoils