Abstract: The rotor of a hybrid aerodyne for producing lift by rotating during a stage of vertical flight and then for being held stationary and stored longitudinally during a stage of cruising flight has at least one single-blade with a counterweight. The length of the active blade that generates lift of the rotor while rotating is significantly shorter than the length of the radius of the rotor. The portion that carries the active blade that makes the connection between the active blade and rotor mast is structurally rigid. The rigid portion that carries the active blade presents a cross-section optimized to provide zero or almost zero lift and very little aerodynamic drag while the rotor is rotating. The assembly is hinged about a transverse axis perpendicular to the vertical axis of the rotor and substantially on the vertical axis of the rotor mast.

Abstract: An asymmetric propulsion mechanism capable of providing both axial thrust as well as lateral maneuverability from a single axis of rotation is described. The mechanism may be used on aquatic vehicles to minimize cost and maximize reliability and endurance. The mechanism comprises one or more propeller blades disposed asymmetrically around a rotating hub under the guidance of a control system including a motor capable of driving the propeller at various radial speeds throughout the course of a single revolution.

Abstract: A self-contained water generation system is disclosed. The present system allows for the generation of water using only wind power and standard air conditioning components. A wind turbine drives, directly or indirectly, a compressor that compresses refrigerant and provides the refrigerant to a condenser and evaporator. During the evaporation of the refrigerant, water is condensed and collected for use. The components of the water generation system may be configured in a housing and movably mounted atop a column so that the housing can rotate about the column, allowing the wind turbine maximize the use of wind forces.

Abstract: A turbine wheel with optimal-mass dampers to dampen a predetermined resonance in context of vibration of a turbine, particularly a low-speed turbine, while assisting in flexibility of adapting to bearing surfaces of recesses of the dampers, by separating mass and flexibility functions by a flexible portion for clamping against the platform, and a mass portion for controlling frictional forces. A damper includes a plate and a counterweight. The plate is stamped from a metal sheet that is substantially thinner than that of the counterweight. The plate includes a wall configured to flexibly contact a platform of the blade of the wheel, while at least partially surrounding a surface of the counterweight. The damper can be used in particular for a wheel of a turbine of a turbine engine, of a fan, or of a BP compressor having mounted blades.

Abstract: An arrangement and a method of rotating a hub of a wind turbine are provided. A wind turbine includes a hub mounted to a nacelle, whereby the hub is rotatable around an axis of rotation in respect to the nacelle. A rotor blade is arranged at the hub that leads to a torque around the axis of rotation of the hub. A counter weight is attached to the hub, whereby the counter weight has a mass that leads to a counter-torque around the axis of rotation. The counter-torque interacts with the torque during the installation of a second rotor blade to the hub. The counter weight is mounted to the hub by a mechanical arrangement that is rotatable in respect to the hub around the axis of rotation of the hub. The mechanical arrangement and the counter weight are rotatable in respect to the hub into a certain predetermined position.

Abstract: A system and method for a vertical axis wind turbine (VAWT) is described which can provide the basis for a new and improved wind turbine design suitable for a range of different power classes such as from 4 kilowatts to 10 megawatts. A vertical blade of chord length C is attached to a central hub via a main support strut of chord length C. The main support strut comprises two sections: a blade-support-section and a counterweight-support-section. Both the blade-support-section and the counter-weight-support-section have a blunt leading edge and a tapered trailing edge with the profile reversing either side of the hub axis. Two control struts comprising aerodynamic profiles support the blade wherein one control strut connects to the upper surface of the main support strut and the other control strut connects to the lower surface of the main support strut hub. The main support strut and the control struts provide lift to the wind turbine and reduce drag.

Abstract: Micro/nano mono-wing aircraft with the wing configured as a winged seed (Samara) is uniquely suited for autonomous or remotely controlled operation in confined environments for surrounding images acquisition. The aircraft is capable of effective autorotation and steady hovering. The wing is flexibly connected to a fuselage via a servo-mechanism which is controlled to change the wing's orientation to control the flight trajectory and characteristics. A propeller on the fuselage rotates about the axis oriented to oppose a torque created about the longitudinal axis of the fuselage and is controlled to contribute in the aircraft maneuvers. A controller, either ON-board or OFF-board, creates input command signals to control the operation of the aircraft based on a linear control model identified as a result of extensive experimentations with a number of models.

Abstract: An impeller includes an impeller body which rotates about a rotation axis, and a vane which is provided at the impeller body. The impeller body receives force asymmetric with respect to the rotation axis in driving and rotation in a fluid in a manner that radially inward fluid force, which is generated due to arrangement of the vane, acts on a predetermined point in a peripheral direction. In the impeller body, a filled space filled, in a fluid, with the fluid is formed.

Abstract: Described is a fan with a blade suitable for use as a ceiling fan. The blade may be regarded as a single blade, although shaft is not attached to blade at one end thereof; rather, shaft is attached to blade at a point between first end and second end. Blade is balanced by counterweights located in blade. In one embodiment, blade is connected to shaft by means that permit angular movement, such as a teeter hinge.

Abstract: Described is a fan with a blade suitable for use as a ceiling fan. The blade may be regarded as a single blade, although shaft is not attached to blade at one end thereof; rather, shaft is attached to blade at a point between first end and second end. Blade is balanced by counterweights located in blade. In one embodiment, blade is connected to shaft by means that permit angular movement, such as a teeter hinge.

Abstract: Process for determination of properties, particularly, the integrity, of an integrated circuit by calculation, wherein a calculation-simulated image of the circuit is compared with a design of the circuit, and deviations between the image and design are detected.

Abstract: A control system for a wind power plant that includes a damage module and a control module. The damage module compares existing stress conditions on one or more component parts of the wind power plant to current energy generating costs. The control module alters electric power generated by the wind power plant based upon the comparison.

Abstract: A mounting arrangement for a ceiling fan has one or more blades located in the same semicircle of rotation so as to produce a center of rotational gravity that lies outside the vertical axis of the rotating fan. A ceiling fan has a counter balancing stabilizing member located in another semicircle of rotation to stabilize the rotating weight of the blade(s) so that during operation of the fan, the center of rotational gravity lies on the fan's axis. A single bladed ceiling fan has a blade with an elongated arcuate body that tapers from one end to its other end. A stabilizing member depends from the blade. There is an opening in the stabilizing member for creating drag when the blade rotates. A cover is provided for covering the opening.

Abstract: A single or multi-bladed rotor for use with a fluid flow generator or reactor, the rotor comprising a central hub which is adapted to be mounted to a rotatable shaft, the rotor further comprises at least one radial blade mounted at one end to the hub, wherein the at least one blade has a fluid reactive face which has the configuration of a logarithmic curve substantially conforming to the golden section, i.e. the order of growth of the radius of the curve which is measured at equiangular radii is constant and conforms to the ratio of 5:8.

Abstract: A mounting arrangement for a ceiling fan has one or more blades located in the same semicircle of rotation so as to produce a center of rotational gravity that lies outside the vertical axis of the rotating fan. A ceiling fan has a counter balancing stabilizing member located in another semicircle of rotation to stabilize the rotating weight of the blade(s) so that during operation of the fan, the center of rotational gravity lies on the fan's axis. A single bladed ceiling fan has a blade with an elongated arcuate body that tapers from one end to its other end. A stabilizing member depends from the blade. There is an opening in the stabilizing member for creating drag when the blade rotates. A cover is provided for covering the opening.

Abstract: A single-blade fan apparatus includes a blade assembly having a hub presenting a longitudinal aperture adapted for receipt on the fan apparatus, a single blade protruding radially from the hub in a first direction, and a counterweight body protruding radially from the hub in a second direction opposite the first direction. The hub, blade and counterweight body are formed of a unitary piece of aluminum, zinc or synthetic resin material. A method of constructing the blade assembly includes providing a mold including a hub cavity, a blade cavity protruding from the hub cavity in a first direction, and a counterweight-body cavity protruding radially from the hub in a second direction opposite the first direction, and fitting a removable mold insert in the blade cavity. The first mold insert fills a portion of the blade cavity remote from the hub cavity.

Abstract: A single-blade fan apparatus includes a blade assembly having a hub presenting a longitudinal aperture adapted for receipt on the fan apparatus, a single blade protruding radially from the hub in a first direction, and a counterweight body protruding radially from the hub in a second direction opposite the first direction. The hub, blade and counterweight body are formed of a unitary piece of aluminum, zinc or synthetic resin material. A method of constructing the blade assembly includes providing a mold including a hub cavity, a blade cavity protruding from the hub cavity in a first direction, and a counterweight-body cavity protruding radially from the hub in a second direction opposite the first direction, and fitting a removable mold insert in the blade cavity. The first mold insert fills a portion of the blade cavity remote from the hub cavity.

Abstract: The invention is related to air flight vehicles, such as vertical take-off and landing (VTOL) airplanes, helicopters and covercraft. The goal of this invention is to create an air rotor designed so that while after vertical take off or cover regime, one can be stopped, fixed in a specific position and hidden into the fuselage (gondola) thus eliminating of air resistance when the rotor is not in working state. On landing this rotor can be extended out, brought into rotation and used for creation of lift force and vertical landing. The indicated goal is achieved by means of the rotor made as single blade (uniblade). The author solved the problem of force and moment balance of single blade. The center of gravity of the counterweight is located below the horizontal plane, and the blade has the horizontal sway axle, that crosses the vertical rotor rotation axis. The author offer this rotor on single axis, on co-axis, and on different exiles.

Abstract: An improved saddle stitching apparatus has dual scoring disks which cooperate with a scoring drum to create a flat spine on a cover. In one embodiment, a split ring is provided with two clamp arms, so that the ring can be releasably secured to the scoring drum. The ring includes a pair of annular grooves, with the distance between the grooves being of the desired spine width. The scoring disks are positioned adjacent the grooves so as to form the scoring lines. A folding assembly is also disclosed, which utilizes a flat carrying belt and a V-belt for purposes of folding the cover and moving the cover toward a stitching station. A gathering chain is also utilized to deliver the cover and signatures to the stitching station. The station includes a guide to assist in directing the preassembled covers and signatures toward a stitching head. Also provided is a block guide and an anvil for assistance in centering the spine beneath the stitching head.

Abstract: A V-twin, two stage compressor has valve plates disposed between the head and cylinder of each stage and mounting free-floating flexible reed intake and exhaust valves therein. The flexible reeds are movably captured between the floors of respective reed recesses, and separate, non-fixed keeper bars are disposed over, but slightly spaced from, the reeds. Keeper bars over the exhaust reed extend above the valve plate for engagement by the head. A restrictor plate lies within a valve plate recess on keeper bars over the intake valve. A cored crankshaft providing motor drive shaft lubrication, and a removable counter-weight providing crankshaft use with one-piece connecting rods is disclosed. A cooling fan is driven by the removable counterweight and V-shaped fan shroud projections direct cooling air over the cylinders and heads while another cooling air port directs air over an intercooler.

Abstract: A rotorcraft having four symmetrically disposed intermeshing rotors coupled to a common drive unit, each rotor having a single blade which is formed with a lifting surface and an oppositely projecting balance arm. The four rotors are coupled to the drive unit by respective rotor shafts and the shafts are inclined with respect to one another such that the path surface traced by each blade is inclined with respect to the path surface traced by each other blade. Each rotor is connected to its associated rotor shaft by way of a universal joint which provides for torque transmission and which permits blade flapping and blade pitch adjustment, and actuators are provided for applying differential collective pitch to the rotors by way of pitch control shafts.

Abstract: The invention shows a rotary positionable installation, such as a wind power, having a tower (11), and an apparatus carrier supported on the tower so as to be rotatable about its axis and rotary positionable by means of an azimuth drive unit, particularly a housing (2), including a frequency adjusting unit (18, 19 27; 40, 42, 46; 66, 74) for the natural yawing frequency of the swinging system of the following components: apparatus carrier (2), azimuth drive unit and tower (1) by adjusting the torsion (rotation) spring constant by means of one of the components and/or the connection between at least two of the components of the swinging system. In this manner, the adjustment of the natural yawing frequency is made possible in a simple manner in respect to construction as well as operation.

Abstract: The invention relates to a wind-driven generating plant for utilizing the energy contained in land and sea winds with at least one blade rotatable about a rotation axis, which is arranged in oblique-angled manner to the horizontal and is optionally connected to a pylon arranged so as to rotate coaxially to the rotation axis of the blade or blades, whereby the hub thereof used for receiving the blade base with associated energy transmission means is connected to a supporting member. Each rotor blade is at an angle .beta. of approximately 40.degree. to 80.degree. to the rotation axis of the rotor, which is oriented at an angle .alpha. of approximately 30.degree. to 70.degree. to the horizontal. The supporting member is arranged on a frame so as to rotate about a vertical axis or at an axis arranged in oblique-angled manner to the vertical.

Abstract: An impeller in a pump, in particular a sewage pump, the passage of which is required to have a given transmission capacity for transmitting the impurities present in the sewage water. When small volumetric flows are being pumped at great delivery lift, it would be advantageous, with a view to achieving good efficiency, to make the passage narrower than the inlet aperture, but up to date it has not been possible to do this without impairing the transmission capacity. In the impeller of the invention, this has been solved in that for achieving sufficient transmission capacity one wider point has been provided in the passage, located between the inlet and outlet margins of the impeller blade.

Abstract: A machine for economical recovery of wind power employs a self-adjusting mass-balanced aerodynamic blade weathervaning freely around a lengthwise pitching axis forward of its aerodynamic center, and an aerodynamic roller in its leading edge, spun at high RPM by a motor. The roller controls aerodynamic performance to high levels of efficiency at high lift coefficients, employing novel roller/airfoil profiles. For ship propulsion, the self-adjusting blade with roller stopped is like a furled sail, and with the blade held angling to the wind with roller spinning is like a large, efficient, easily controlled sail. On a horizontal axis wind turbine, the self-adjusting blade is continuously held to an efficient angle of attack by centrifugal lift-increasing pitching moments balancing aerodynamic lift-decreasing pitching moments. The blade whirls steadily despite fluctuations of wind speed and direction, reducing stresses, and preventing structural damage or loss of efficiency.

Abstract: A vertical axis wind turbine has one or more blades (10) mounted in cantilever manner on a hub (12) on a short tower (14). The or each blade (10) is unsupported above the level of the hub (12) and extends freely upwards. The hub (12) may be a rigid mounting or a pivot mounting. If two blades (10) are used, they are desirably arranged in a crossed configuration so as to extend along a common axis. The upward arm of the blade (10) can be straight and rigid, or flexible, or cranked, or curved. The wind turbine is suitable both for land-based use and on water-going craft.

Abstract: A pump impeller to be used when pumping liquid containing solid bodies. The impeller is provided with one single vane designed with a hollow for balancing the impeller. The hollow is connected to the surroundings via a slot at a point where the vane has its maximum diameter. The impeller is then perfectly balanced when rotating in liquid as well as in air.

Abstract: A wind turbine with a single rotor blade drives an alternator whose output is connected to an a-c network to supply same with power when the alternator acts as a generator under the driving force of the wind. The network establishes a synchronous speed for the alternator which corresponds to a rotor speed so chosen that a certain laminar flow along the blade will be maintained even at high wind velocities. Changing the pitch of the blade allows a wide range of wind velocities to be accommodated.

Abstract: Wind turbine of cross-flow type with constant or cyclically adjustable blade angle. The vanes (2) consist of one or more sets of blades with arched or, in sections, straight extension in longitudinal direction, comprising several substantially parallelly extending blades (3, 4 8), the spacing of which from one another is fixed by means of a number of spacing elements (5, 9) having aerodynamic profiling and providing a spacing of the order of magnitude of between 1/2 and 3 times the blade chord.

Abstract: Wind turbine of cross-flow type with curved or in sections straight vanes (1,2,9). Two vanes or sets of blades are formed in planes parallel to the rotor axis (3) and with the blade planes disposed approximately perpendicularly to one another.

Abstract: The wind powered mechanical and electric power generator, is a process and apparatus which uses the mechanical advantage of a lever arm to multiply the energy of a moving or mobile weight which is wind powered from a propeller drive, and converts by gravity and mechanical advantage said energy to useful work. The unit consists in its simplest form of a counter balanced wheel on one side of a centerline shaft and a concentrated weight on the opposite side, both kept rigid by a connecting structure beam, the entire unit made to revolve around the centerline shaft by moving a mobil weight around the wheel perimeter in concert with the units rotation so as to continually produce an off-balance of weights, which then uses gravity to cause the total unit to rotate. The mobile weight is driven around the wheel by a wind powered small propeller.

Abstract: A wind driven blade is pivotally carried by a rotatable crank arm. The blade rotates relative the crank arm from a position perpendicular to the wind during the power stroke to a position parallel to the wind during the return stroke. The moving mass is dynamically balanced to provide a self-contained single blade modular unit. A selected number of the modular units are adjoinable to form a multi-blade wind motor in which any given module may be functionally disconnected.