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| Number | Title | Issue Date |
| 8157533 | Wind turbine blade with variable aerodynamic profile A wind turbine blade comprising an active elastic member arranged with access to the surface of the wind turbine blade is provided. The active elastic member is deformable from a first shape to a second shape and the lift coefficient of the airfoil with the active e... | 04/17/2012 |
| 7857598 | Variable-twist rotor blade controlled by hub pitch angle and rotational speed The twist distribution of torsionally-flexible rotor blades is adjusted by exploiting centrifugal effect on inertial torquers affixed at one or more stations along the blade span. Twist is thereby made to vary passively as a function of rotor speed and hub incidence... | 12/28/2010 |
| 7396207 | Wind turbine A wind turbine comprising: (1) a support portion; (2) a hub that is mounted to rotate adjacent the support portion; and (3) at least one turbine blade mounted adjacent the hub and that comprises both a rotor and a sail that is mounted adjacent the rotor. The rotor m... | 07/08/2008 |
| 7393181 | Expandable impeller pump An impeller according to an example of the present invention comprises a hub, and at least one blade supported by the hub. The impeller has a deployed configuration in which the blade extends away from the hub, and a stored configuration in which the impeller is rad... | 07/01/2008 |
| 7354246 | Electronics cooling fan with collapsible fan blade An electronics cooling fan comprises at least one collapsible fan blade driven by centrifugal force to extend radially as the fan spins and driven by elastic force to retract as spinning slows or stops. ... | 04/08/2008 |
| 7332838 | Motor-fan assembly and combustion-type power tool employing the same To connect a motor shaft to a fan, a connection rod is used that is symmetrical in shape with respect to a longitudinal axis of the connection rod. The connection rod includes a first part formed with a hole in coaxial with the longitudinal axis, and a second part f... | 02/19/2008 |
| 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 turbine operatively carried by the platform for generating power in r... | 09/18/2007 |
| 7267476 | Dual handle immersion blender There is provided an immersion blender essentially having a housing or body portion for containing a drive motor, a shank or drive shaft operatively connected to the drive motor, and a processing tool operatively connected to the drive shaft. The immersion blender a... | 09/11/2007 |
| 7223073 | Boat propeller A boat propeller comprising a central hub member and an inner hub assembly that defines a longitudinally extending bore having an inner surface. The exterior surface of the central hub member is sized and shaped for disposition therein the bore of the inner hub asse... | 05/29/2007 |
| 7204674 | Rotor blade for a wind power installation A rotor for a wind power installation having at least one rotor blade. The smaller the surface area on which the wind acts, that is to say in particular the rotor blade area, the correspondingly lower is the load level for which installation has to be designed and t... | 04/17/2007 |
| 7140265 | Miniature particle and vapor collector An apparatus for collecting particles or vapor from air or surfaces comprising: a housing comprising an inlet open to the air to be sampled and an outlet; and a fan having one or more open areas within the housing capable of being driven at a speed effective to caus... | 11/28/2006 |
| 7129604 | Air cooled type generator that is mounted in easier and quicker manner An air cooled type generator includes a housing, an engine, a cooling fan mounted in the engine, a generator body having a first side juxtaposed to the engine, and a cooling fan rotatably mounted on an opened second side of the generator body and including a plurali... | 10/31/2006 |
| 7118338 | Methods and apparatus for twist bend coupled (TCB) wind turbine blades A method for controlling a wind turbine having twist bend coupled rotor blades on a rotor mechanically coupled to a generator includes determining a speed of a rotor blade tip of the wind turbine, measuring a current twist distribution and current blade loading, and... | 10/10/2006 |
| 7118341 | Self adjusting sail vertical shaft windmill A vertical shaft is provided and supported whereupon are mounted sails that can so self adjust as to interact with the wind in such a way as to power a windmill as well as relieve themselves from winds that are too severe while maintaining continuous operation. ... | 10/10/2006 |
| 7059833 | Method for improvement of the efficiency of a wind turbine rotor A method for the improvement of wind turbine rotor efficiency blades of a wind turbine rotor with serrated trailing edges each having a plurality of span-wise, periodic indentations, in the form of saw teeth having approximately 60 degrees included angles between ad... | 06/13/2006 |
| 7037074 | Lightweight, foldable, and replaceable fabric fan blades A ceiling fan assembly is provided having a frame defining a plurality of fan blades, a replaceable one-piece fabric covering attached to the frame, and a frame holder that supports and positions the frame and attaches it to a fan motor. The fabric covering may be u... | 05/02/2006 |
| 7017871 | Electric appliance stand with simple telescopic support rod Electric appliance stand with simple telescopic support rod, including a telescopic operable arm. A lower end of the operable arm is pivotally disposed on a base seat and an upper end of the operable arm is pivotally connected with a connecting seat. The base seat i... | 03/28/2006 |
| 7014417 | Auto suction hybrid pump A hybrid pump (1) with a housing (2) comprising at least one suction port (10) and at least one pressure port (11). A rotor (5) is eccentrically arranged in the housing chamber (3) which is substantially enclosed in a circul... | 03/21/2006 |
| 7011503 | Fan blade for allowing airflow with fan in failure condition A fan and a fan blade are provided for allowing airflow through the fan blade in a fan failure condition. The fan blade includes a peripheral member defining an opening. A flexible cover member is attached to the peripheral member for covering the fan blade opening ... | 03/14/2006 |
| 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 of radial tabs in flexible material. The core and the body with the ta... | 03/07/2006 |
| 6994518 | Pre-whirl generator for radial compressor A pre-whirl generating apparatus (26) is provided that employs deformable air deflecting vanes (46) adjacent the inlet (18) of a radial air compressor (12-22), which vanes (46) can be mechanically deformed to generate positi... | 02/07/2006 |
| 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 curvature, when loaded, in one direction of rotation, so that the po... | 01/24/2006 |
| 6960112 | Airfoil blade with cushioned edge for powered toy aircraft An airfoil blade in a powered toy aircraft has a body with a cushioned edge. The body has a first end adjoining a hub, a second opposing end, a forward edge, and an opposing trailing edge. The cushioned leading edge is attached mechanically to the body and extends a... | 11/01/2005 |
| 6811377 | Ceiling fan blade A ceiling fan blade comprises a cloth blade, a plurality of springs and an arctuated frame. The arctuated frame is provided with a protrusive shaft for cooperating with the springs. The cloth blade forms an inclined angle for pushing air. Meanwhile, by taking advant... | 11/02/2004 |
| 6769873 | Dynamically reconfigurable wind turbine blade assembly A dynamically reconfigurable wind turbine blade assembly includes a plurality of reconfigurable blades mounted on a hub, an actuator fixed to each of the blades and adapted to effect the reconfiguration thereof, and an actuator power regulator for regulating electri... | 08/03/2004 |
| 6755609 | Radial pump A radial-flow pump (1), and especially a coolant pump for an internal combustion engine, comprising an impeller (2) provided with vanes (5) and a directing device (4) including at least one temperature- and/or speed-sensitive element for ... | 06/29/2004 |
| 6659065 | Flexible vane rotary engine An internal combustion rotary engine that employs resilient, flexible vanes attached to a rotor that spins within an oval cavity in a housing. The vanes, which are long enough to extend slightly radially from the rotor by a distance beyond the interior su... | 12/09/2003 |
| 6582196 | Windmill rotor and wind blades therefor A windmill rotor of the front-runner type and airfoil type wind blades therefor in which the blade tips have a longitudinally forwardly curved configuration. The curvature solves the problem of inward flexure of the blade in strong wind conditions, withou... | 06/24/2003 |
| 6402472 | Sail-type windmill wheel A sail-type windmill wheel is provided in which the area of the wheel facing into the wind is adjusted by an automatic variation of the blade angle of the sails. The wind wheel comprises a hub (22) with a plurality of radially extending spars (18), substa... | 06/11/2002 |
| 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 blade includes a blade-part and a root-part, the root-part ... | 11/06/2001 |
| 6283710 | Vertical axis wind turbine rotor having self-fairing vanes A vertical axis wind turbine rotor having self-fairing vanes wherein the center of pressure on each vane is coplanar with the journal for the hub of the turbine rotor.... | 09/04/2001 |
| 6264450 | Flexible vane pump A pump has a rotor with two or more flexible vanes forming one or more compartments between adjacent vanes. The rotor is mounted offset relative to a rotor sleeve such that the volume of the compartments varies as the rotor rotates in the sleeve. Incoming... | 07/24/2001 |
| 6116855 | Flexible impeller removal system A flexible impeller has an insert design incorporating a threaded end within its insert that cooperates with a threaded removal tool for jacking the impeller from the shaft by rotation of the threaded removal tool.... | 09/12/2000 |
| 6109874 | Portable fan device There is disclosed an elongate style portable fan device having an elongate body portion including a fan device mounted on the top end of the body portion. The elongate body portion is designed to lay flat on an underlying flat surface in a manner which m... | 08/29/2000 |
| 6106235 | Co-molded fan vane Co-molded fan vanes on a propeller. The vanes provide a soft, flexible material guard along the leading edge of each vane. This obviates the use of a propeller edge guard without concern for injury.... | 08/22/2000 |
| 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 least one of plurality of fan blades (102-04) includes shape ... | 01/18/2000 |
| 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 to return to a more radial blade configuration at lower r... | 11/30/1999 |
| 5961288 | Process for manufacturing a composite component capable of flexing and twisting This process consists in making separately a set of individual plies consisting of rods impregnated with thermoplastic resin, in assembling several individual plies in order to form a rod bundle, in encasing at least the rods in at least one elastomer and... | 10/05/1999 |
| 5938325 | Stirring rod with flexible extensions for mixing materials An elongate rod having a first end or end area and an oppositely disposed second end or end area, the first end suitably structured for connecting to a rotary drive such as the chuck of a hand held drill type motor, food blender drive or the like for exam... | 08/17/1999 |
| 5937644 | Device for extracting energy from moving fluid An energy conversion apparatus for extracting useful energy from moving fluids such as water, the apparatus including a shaft and a plurality of integrally formed blade modules which are coupled together to form the shaft, a plurality of blades is integra... | 08/17/1999 |
