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| Number | Title | Issue Date |
| 8152467 | Blade with tangential jet generation on the profile A blade of a fluid-flow machine has at least one cavity 2 arranged in the blade 1, with the cavity 2 connecting to a fluid supply, and at least one outlet opening 3 connecting the cavity 2 to a flow path, in which the blade 1 | 04/10/2012 |
| 8133025 | Turbine blade system A turbine blade system relating to a tip device appended to the blade tip of a turbine. The tip device controls the flow of air to ultimately reduce noise signatures while increasing aerodynamic efficiency. Passive or actively controlled configurations also permit t... | 03/13/2012 |
| 8128364 | Wind turbine rotor blade with porous window and controllable cover member A wind turbine blade includes a porous window defined in the suction side of the blade. The porous window is permeable to airflow from within an internal cavity of the blade through the suction side. A deployable cover member is configured with the porous window and... | 03/06/2012 |
| 8029239 | Rotor for a wind energy turbine and method for controlling the temperature inside a rotor hub A rotor for a wind energy turbine includes a hub defining an inner space and at least one rotor blade defining an inner space and having a tip and a root attached to the hub. The inner spaces of the hub and the at least one rotor blade are in fluid communication. Th... | 10/04/2011 |
| 8016560 | Wind turbine rotor blade with actuatable airfoil passages A wind turbine rotor blade includes a pressure side and a suction side. At least one airfoil passage is defined through the blade between the pressure side and suction side. A respective cover is configured over the airfoil passage at each of the pressure and suctio... | 09/13/2011 |
| 7396208 | Divided blade rotor A novel rotor blade is presented with an integral tip portion from which two diverging blade portions extend to separated respective roots. The blade may have conventional airfoil sections, or may be made from flat or curved sheet material. The two rotor blade porti... | 07/08/2008 |
| 7364404 | Turbomachine with fluid removal A turbomachine includes at least one rotor (6), at least one stator (7), and a casing (1), with the rotor (6) comprising several rotor blades (8) attached to a rotating shaft, and with the stator (7) being provided with stat... | 04/29/2008 |
| 7354247 | Blade for a rotor of a wind energy turbine A blade for a rotor of a wind energy turbine includes opposite upper and lower faces, opposite leading and trailing edges connecting the upper and lower and at least one air outlet opening arranged on at least one of the upper face, the lower face and the trailing e... | 04/08/2008 |
| 7322795 | Firm cooling method and hole manufacture A cooled cast part has an exterior surface. A cooling passageway system extends from at least one inlet port to a plurality of outlet ports. The passageway system includes a first passageway to at least a first of the outlets and surrounding at least one post. The s... | 01/29/2008 |
| 7267525 | Rotor for a steam turbine A rotor for a steam turbine for working steam and including at least two rotor parts welded to one another using a circumferential, annular weld zone, which is closed in the circumferential direction. A cooling channel system is formed in the rotor and has at least ... | 09/11/2007 |
| 7134841 | Device for optimizing and adjustment of steam balance hole area A hole diameter adjustment device for changing an existing diameter of a hole formed in a component to a smaller desired diameter includes an outer sleeve adapted for insertion within the existing hole, the first outer sleeve having an inner bore including a first t... | 11/14/2006 |
| 7114844 | Aeration apparatus and method The present invention provides an improved aeration impeller for use in a mixing assembly having an axis of rotation. The aeration impeller includes a hub and a first and second blades that are connected to the hub. Each blade has a first portion positioned at an an... | 10/03/2006 |
| 7070144 | Aircraft and missile afterbody flow control device and method of controlling flow The present invention relates to an afterbody flow control system and more particularly to aircraft or missile flow control system for enhanced maneuverability and stabilization. The present invention further relates to a method of operating the flow control system.... | 07/04/2006 |
| 6997676 | Bifurcated outlet guide vanes A turbine rear frame includes a row of outlet guide vanes extending between outer and inner bands. Each of the vanes is bifurcated into a forward prow integrally joined to an aft stern by a septum therebetween. The prow and stern collectively define the aerodynamic ... | 02/14/2006 |
| 6948906 | Rotor blade system with reduced blade-vortex interaction noise A rotor blade system with reduced blade-vortex interaction noise includes a plurality of tube members embedded in proximity to a tip of each rotor blade. The inlets of the tube members are arrayed at the leading edge of the blade slightly above the chord plane, whil... | 09/27/2005 |
| 6942461 | Rotor blade hub The present invention concerns a rotor blade hub for a wind power installation. Such a hub represents a mechanical connection between the (horizontal) rotor shaft (rotor spindle) and the rotor blades. This means that all forces which occur at the rotor blades, insof... | 09/13/2005 |
| 6942445 | Gas turbine cooled shroud assembly with hot gas ingestion suppression A cooled shroud assembly includes an angled slot and a plurality of dilution jet openings. The shroud forward cavity is modified such that at least one recirculation zone is produced. The angled slot forces an axial change in momentum of the hot gas flow and increas... | 09/13/2005 |
| 6940185 | Advanced aerodynamic control system for a high output wind turbine An advanced aerodynamic control system for a wind turbine including a drive shaft and blade. The control system includes an air control system coupled to a duct that extends from a first end toward a second end of the blade. A slot extends along a portion of a surfa... | 09/06/2005 |
| 6921194 | Device for mixing a flowable or pourable medium, especially a highly viscous medium A device for mixing a flowable or pourable medium has a container for receiving the medium and a rotatable shaft having radially projecting support arms and rotatable in a direction of rotation. Mixing elements are connected to the radially projecting support arms. ... | 07/26/2005 |
| 6881034 | Leaf rotor A rotor which has a cone shaped tube with a large air input end and a smaller air output end. The cone shaped tube increases air pressure as the air passes through the tube and provides more lift. ... | 04/19/2005 |
| 6821090 | Gust alleviation/flutter suppression device An active control device is disclosed comprising an array of actively controlled oscillating air jets disposed on an aircraft structure. In a preferred embodiment, the device senses parameters associated with incipient unsteady aerodynamic excitation, such as free s... | 11/23/2004 |
| 6733239 | Fan blade with an active carbon filter bed A fan blade provided with an active carbon filter bed, wherein, an opening is provided in the center of the fan blade, and said opening is covered with an active carbon filter bed. And said active carbon filter bed can be in the form of powder, grain or fiber attach... | 05/11/2004 |
| 6435815 | Aerofoil for an axial flow turbo machine An aerofoil (22,24), preferably of a high lift, highly loaded design, for an axial flow turbo machine (10). The aerofoil having a span, a leading edge (LE), a trailing edge (TE) and a cambered sectional profile comprising a pressure surface (30,72) and a ... | 08/20/2002 |
| 6368059 | Controlled passive porosity systems to mitigate cavitation A controlled passive porosity system includes a lifting device for operation in a multi-phase liquid, the lifting device having a low pressure surface with a plurality of holes and a high pressure surface with a plurality of holes. A common plenum is disp... | 04/09/2002 |
| 6234751 | Oscillating air jets for reducing HSI noise Porous surfaces on an aerodynamic structure driven with positive and negative pressures are used in an active control system for attenuating shock waves responsible for high-speed impulsive (HSI) noise. The control system includes an array of apertures in... | 05/22/2001 |
| 6203269 | Centrifugal air flow control Blades, including helicopter rotor blades, gas turbine engine fan blades, air moving machinery fan blades, and the like, have an air inlet near the hub of the blade, which may be on the pressure side of the blade and/or near the leading edge or trailing e... | 03/20/2001 |
| 6092990 | Oscillating air jets for helicopter rotor aerodynamic control and BVI noise reduction An active control system for reducing blade-vortex-interaction (BVI) noise generated by a rotor blade. The active control system includes a pressure sensor assembly, a device for changing a lift generated by the rotor blade, and a controller for activatin... | 07/25/2000 |
| 5938404 | Oscillating air jets on aerodynamic surfaces An active control device for use on an aerodynamic structure is provided. The aerodynamic structure includes an outer aerodynamic skin and an interior volume, wherein the outer aerodynamic skin surrounds the interior volume. The active control device incl... | 08/17/1999 |
| 5795131 | Fan air cleaner A ceiling fan for cleaning air in a room wherein each blade of the ceiling fan has a cavity open to the top and bottom surfaces of each fan blade and a filter unit in each of the cavities but within the confines of the fan blade such that, when the ceilin... | 08/18/1998 |
| 5564901 | Low noise fan A large air moving fan has a number of hollow airfoil blades extending generally radially from a rotatable hub. The tips of the blades are surrounded by a circumferential shroud leaving a narrow gap between the tips of the blades and the shroud. A fin on ... | 10/15/1996 |
| 5503527 | Turbine blade having tip slot A gas turbine engine rotor blade includes an airfoil having first and second sidewalls joined together at leading and trailing edges. First and second tip walls extend from adjacent the leading edge along the respective first and second sidewalls to adjac... | 04/02/1996 |
| 5480284 | Self bleeding rotor blade A self bleeding rotor blade and method of operation are disclosed for reducing boundary layer thickness for improved performance. The rotor blade includes an outer surface configured for pressurizing air flowable thereover with bleed apertures being dispo... | 01/02/1996 |
| 5341565 | Method of securing a filter element to a blade of a fan A method of securing a filter element to a blade of a fan includes firstly, forming a cavity within a fan blade so that the cavity has a tip end oriented toward a tip of the fan blade and a root end oriented toward a root of the fan blade. Secondly, form ... | 08/30/1994 |
| 5314308 | System for controlling higher harmonic vibrations in helicopter rotor blades Higher harmonic control (hereinafter HHC) of helicopter rotor blade vibrations is provided by an actively controlled, rotatable, slotted cylinder which is mounted at an outboard section of each blade. Continuous rotation of each cylinder about its longitu... | 05/24/1994 |
| 5256034 | Variable pitch propeller for use in conjunction with a vertical axis wind turbine A variable pitch propeller mechanism includes a plurality of airfoil-shaped blades on three spaced apart blade arms. The airfoil-shaped blades are pivotally connected to the blade arms and are interconnected to each other by rigid connecting rods so these... | 10/26/1993 |
| 5217349 | System and method for suppressing noise produced by rotors Disclosed is a system and method for suppressing rotor noise by distributing mass and momentum sources and sinks on the rotor blade. A source is located on the blade, and therefore has the directivity of moving, as opposed to a stationary source. Moreover... | 06/08/1993 |
| 5176447 | Turbomixer with rotating injector for mixing liquid A mixer is disclosed for absorbing and mixing gases in liquids, or for mixing a liquid with another liquid and/or atomizing a liquid in a gas. The mixer includes an impeller with blades which are bent backward, the blades being surrounded on both sides by... | 01/05/1993 |
| 5037209 | Apparatus for the mixing of fluids, in particular pasty media and a process for its operation A stirring mechanism, with a plurality of hollow, at least partially conically shaped stirring elements, which are provided with two openings, are symmetrically offset and are fixed on the stirring shaft (2) at least approximately tangential to an imagina... | 08/06/1991 |
| 4793771 | Impeller for spherical pumps An impeller forming a unit with the spherical rotor of a sphero-pump consists of a disc with vanes and an inlet member, both made by injection molding from resin. A rotor plate made from a thick gauge sheet metal covers the vanes and is held in position b... | 12/27/1988 |
| 4714408 | Radiator fan A radiator fan is disclosed which comprises a plurality of blades, each having formed therethrough a number of passages each of which extends in such a direction as not to be influenced by dynamic pressure which the blade is subject to.... | 12/22/1987 |
