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Match Document Document Title
8143740 Apparatus for storing and using wind energy  
An apparatus for storing and using wind energy has a hub, blades extending radially outwardly from the hub, a shaft interconnected to the hub, a generator connected to the shaft, a first coupler...
8043053 Self locking trim tab  
A trim tab assembly includes first and second shape memory alloy (SMA) actuators and a trim tab substrate which provide elastic/plastic locking in response to an induced strain actuation.
8021114 Self-adjusting wind turbine generator blade  
A self-adjusting blade for wind turbine generator or windmill will change width of blades according to wind speed to optimize efficiency. The windmill comprises a brace, rib tubes, cylinders,...
7850429 Helicopter rotor  
There is described a rotor for a helicopter, having a hub rotating about a first axis; a number of blades projecting from the hub in respective longitudinal directions lying in a plane crosswise to...
7841831 Asymmetrically changing rotating blade shape (ACRBS) propeller and its airplane and wind turbine applications  
A propeller includes a plurality of propeller blades. Each blade has an adjustable drag coefficient. A plurality of actuators adjusts the drag coefficients of the propeller blades. A controlling...
7708257 Apparatus for treating solids  
Apparatus for treating solids, in particular mixing, pelletizing or drying, includes a vessel receiving a solid product, and a driveshaft which is arranged in the vessel. Disposed in fixed rotative...
7270513 Apparatus and method for generating power from moving water  
Apparatus for generating power from a water current in a body of water comprises a longitudinally extending flotation platform for maintaining the apparatus afloat in the body of water and a water...
7156612 Spigot arrangement for a split impeller  
A spigot arrangement for split impeller (inducer and exducer) includes a recess of the exducer and means for reducing exducer blade root stresses and localized contact stresses between inducer and...
7083383 Segmented rotor blade trim tab  
A trim tab assembly for a helicopter rotor blade includes a plurality of metal panels that are secured to the trailing edge of a composite material helicopter blade. Each of the metal panels can be...
7008187 Rotor for cooling pumps, in particular for marine engines and relevant manufacturing process  
A rotor for cooling pumps is provided. The rotor is of the type which includes a core to be assembled on a shaft connected with an engine and a body, fitted in the core, provided with a plurality...
6988873 Monodirectional impeller with flexible vanes  
A monodirectional impeller for centrifugal electric pumps having a permanent-magnet synchronous motor, having vanes which are deformable at least along part of their extension so as to change their...
6312223 Marine propeller  
A marine propeller includes a hub defining an axial direction of the propeller, a plurality of adjustable propeller blades disposed around the hub, and a blade setting adjusting arrangement. Each...
6182929 Load carrying structure having variable flexibility  
A load carrying structure having a selectively rigid or flexible characteristic includes a thermoplastic material (7) having a softening temperature above the operating temperature range of the...
6065936 Axial fan, method of manufacturing impeller for axial fan, and mold for manufacturing impeller for axial fan  
This invention provides a compact, flat axial fan which is not limited by the shape of an incorporated rotor magnet and ensures a sufficiently large air flow and wind pressure, wherein the slide...
6015263 Fluid moving device and associated method  
A fluid moving device (100) includes a rotatable assembly (101), and a plurality of fan blades (102-04) disposed circumferentially around and extending outward from rotatable assembly (101), at...
6015258 Wind turbine  
Wind turbine apparatus is described for converting wind energy into electrical energy. The apparatus includes a rotatable central shaft, a plurality of rotor blades attached to the central shaft,...
5993158 Method and apparatus for aeration using flexible blade impeller  
An impeller having flexible impeller blades with a stiffness which allows the blades to flex into a backward-curved impeller configuration at the maximum intended rotational speed of operation, and...
5931639 Helicopter blade assembly adapted to permit rapid forward flight  
A helicopter blade assembly for permitting rapid forward flight in a helicopter having separate means for providing a forward impetus. The assembly has a set of rotatable blades attached to a...
5877566 Submersible magnetic motor having improved rotary blades  
A submersible magnetic motor having improved rotary blades comprising a magnetic motor body, a magnetic rotor and a rotary impeller wherein the rotary impeller comprises a rotary hub provided with...
5784978 Wind energy catchment device  
This invention is a wind energy catchment system using a central vertical shaft, the bottom end of which rotates and is secured to a rigid support fixed to the ground. The lower part of the shaft...
5505589 Controllable variable twist rotor blade assembly  
A controllable variable twist rotor blade assembly wherein the twist along the span of the blade is continuously variable and may be controlled either manually by the pilot or automatically...
5284419 Propeller with blades which can be twisted  
Propeller with twistable blades comprising a spar with ribs which can be rotated in opposite directions about the axis of the spar by an adjusting device. A coupling device in the propeller ensures...
5263846 Self-actuated rotor system  
The present invention discloses a main rotor collective pitch control assly for rotary wing aircraft. The assembly uses segmented rotor blades. The collective pitch of each movable segment may be...
5207558 Thermally actuated vane flow control  
Thermally actuated flow diverters for gas turbine engines are provided which include an arrangement of vanes in spaced overlapping array, which direct, e.g. coolant air flow to rotating engine...
4884948 Deflectable blade assembly for a prop-jet engine and associated method  
A propeller for a prop-jet engine having a propellor blade formed as a hollow shell member whose outer surface has an aerodynamic blade profile, the propellor blade being secured to a rotor via an...
4802823 Stress relief support structures and assemblies  
An improved design for a structure such as a turbine vane or blade subjected to extreme temperature levels and/or gradients resulting in extreme deformation stresses within the structure. The...
4720242 Centrifugal pump impeller  
An impeller for a centrifugal pump is disclosed for attenuating the effects of pressure and flow surges experienced by the pump. The impeller includes a rotatable impeller shaft to which a...
4650400 Helicopter blade pitch adjusting system  
A helicopter blade positioning mechanism provides collective and cyclic pitch angle adjustment of the blades independently. This mechanism is all enclosed within the blade driving axle. The pitch...
4627791 Aeroelastically responsive composite propeller  
A propeller blade made of an advanced composite of uniaxial fibers laminated in crossplies to take advantage of their high axial strength. The thinness and strength of the plies are exploited in...
4547125 Wind turbine  
A wind turbine, having (a) at least one pair of sail means, each said sail means having upper and lower portions hingedly connected together to permit said portions to move away from and towards...
4537143 Apparatus for the stabilizing of the direction of travel of watercraft, specifically a sword or fin for sailboards  
The present invention relates to an apparatus for the stabilizing of the direction of travel of watercraft. The invention relates specifically to a sword or fin for sailboards. In order to allow...
4533849 Ceramic bistable deflection element  
A bistable ceramic deflection element includes an assembly of two ceramic plates of a ferroelectric ceramic material which can be easily polarized and which has a low coercive field strength, one...
4480956 Turbine rotor blade for a turbomachine especially a gas turbine engine  
A high-temperature, extremely high-speed ceramet composite blade comprising a ceramic blade jacket seated from above on a metallic core having a crossweb near its upper end for securing the jacket...
4462755 Anvil-strap rotor  
An aerodynamic rotor having a flexible blade comprising a plurality of planar layers and an anvil having configured bearing areas engagable with the flexed blade is presented. The plurality of...
4393650 Gas turbine engine having an automatic ice shedding spinner  
A gas turbine propulsion engine for aircraft of the type in which thrust is provided only from flow of exhaust gases or a combination of flow of exhaust gases and by-pass air, the engine having a...
4334824 Flexible fan device  
A flexible fan device includes a power driven boss and a plurality of fan blades, each secured on the boss at an attached angle. The fan blade has a root portion secured to the boss and a tip...
4197057 Fan assembly  
The fan assembly for a motor vehicle includes a plurality of radially extending blades each having a first rearwardly facing concave curvature extending along the entire length of the blade...
4143536 Method of correcting rotational speed of screw propeller  
The rotational speed of a screw propeller mounted on a propeller shaft of a ship is correctively increased or decreased by locally heating the back or face side of each blade of the propeller along...
4137010 Constant lift rotor for a heavier than air craft  
A rotor blade extended radially from a hub, characterized by an elongated spar and a plurality of axially aligned shells pivotally mounted on the spar, each having an aerodynamic center located in...
4130377 Helicopter blade and rotor  
A torsionally compliant helicopter blade having its aerodynamic center axis positioned selectively forward of its center of gravity and elastic axes throughout a selected portion of the blade span...
4028003 Torsionally compliant helicopter rotor blade with improved stability and performance characteristics  
A torsionally compliant helicopter rotor blade with maximum blade torsional flexibility at the blade tip portion and so shaped at the blade root portion that the locus of shear centers and the...
3958905 Centrifugal compressor with indexed inducer section and pads for damping vibrations therein  
A centrifugal compressor assembly for a gas turbine engine includes an inducer section and an impeller section mounted for rotation about an axis. Because leading edges of the impeller blades are...
3914068 Fan for motor vehicles  
A fan, particularly for use in motor vehicles which has a hub and a plurality of radially deployed blades is disclosed. The blades, made of flexible plastic or spring steel, have a pitch angle at...
3914069 Axial flow fan having fully streamlining flexible blades  
An axial flow fan for use on variable speed engines for pulling a cooling fluid past a cooling coil, particularly at low speeds, responsive to rotation of a rotary part driven by the engine...
3910718 Limited deflection flexible bladed fan for use with viscous shear clutch  
For use with a viscous shear clutch, a flexible bladed fan having a rigid reinforcement member overlying the upstream side of each flexible blade thereof and extending rearward at an acute angle to...
3902821 Helicopter rotor  
A helicopter rotor having a plurality of fully articulated rotor blades with each blade having a fully cambered airfoil surface, a relatively stiff inboard portion, and a relatively flexible...
3901625 Self-adjusting fan vane  
A self-adjusting fan vane of synthetic resin has a narrow, thickened, inflexible portion at the leading edge attached to the periphery of the fan hub and an elastically flexible vane flap attached...
3891349 Cooling fan construction and method of making same  
A cooling fan formed of two sheet metal layers joined to a centrally contained spider arm. The configuration of the resulting blade is streamlined or an airfoil in cross section. In constructing...
3874816 Windmill blade  
A windmill blade that has a rigid leading edge, a rigid root portion and a movable blade tip. Control of the geometric twist of the windmill blade is accomplished through proper selection of the...
3860362 FLEXIBLE BLADED FAN  
A flexible blade fan assembly suitable for use as an automobile radiator cooling fan. The leading edges of the flexible blades are riveted between the fan spider arms and reinforcement strips or...
Matches 1 - 50 out of 109 1 2 3 >