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| Number | Title | Issue Date |
| 8070453 | Centrifugal impeller having forward and reverse flow paths A centrifugal impeller having an inlet and a plurality of outlets, the outlets including at least one outlet in a forward direction of the impeller and at least one outlet in a rearward direction of the impeller. A flow path distance of the outlet in the forward dir... | 12/06/2011 |
| 8016567 | Separation resistant aerodynamic article An airfoil disclosed herein comprises a pressure surface 42 exposed to a stream of fluid, a suction surface 40 exposed to the stream of fluid and a passage 56 extending from a passage intake end 60 to a passage discharge end 66. Th... | 09/13/2011 |
| 7959412 | Wind turbine rotor blade with acoustic lining A rotor blade for a wind turbine is provided, the rotor blade comprising an acoustically porous surface layer at least partially covering at least one surface of the rotor blade, at least one reactive acoustic element located below said acoustically porous surface l... | 06/14/2011 |
| 7942640 | Method and apparatus for use in protecting wind turbine blades from lightning damage A method and apparatus to facilitate protecting wind turbine blades from lightning damage include a turbine blade for use with a wind turbine, wherein the turbine blade includes a first sidewall and a second sidewall. The second sidewall is coupled to the first side... | 05/17/2011 |
| 7942639 | Hybrid bucket dovetail pocket design for mechanical retainment A method for mechanically attaching a composite or polymeric material to a bucket in a radial airfoil includes creating at least one dovetail shape pocket in the bucket having inclined interfaces with respect to the radial airfoil, and filling the pocket with the co... | 05/17/2011 |
| 7931445 | Apparatus and method for cleaning an active flow control (AFC) system of a wind turbine An active flow control (AFC) system for use with a wind turbine is provided. The wind turbine includes at least one rotor blade. The AFC system includes at least two manifolds at least partially defined within the at least one rotor blade, at least one aperture in f... | 04/26/2011 |
| 7896620 | Integral gas turbine compressor and rotary fuel injector An integral impeller and fuel pump for a small gas turbine engine, the impeller being a centrifugal impeller to supply compressed air to the combustor, the rotor disk of the centrifugal compressor having at least one radial fuel passage connecting a central bore of ... | 03/01/2011 |
| 7607894 | Wind turbine blade A wind turbine blade includes a drain comprising at least one bore formed on the surface of the blade and communicating with the interior of the blade, the bore being located at the root area. The bore is preferably from 8 mm to 15 mm wide. In blades having an inter... | 10/27/2009 |
| 7435057 | Blade for wind turbine A blade for a wind turbine includes a device for causing air at an increased velocity and/or pressure to escape from exit openings in the blade, thereby to apply a force. Pressure and diameter adjustable valves may be provided at each exit opening or orifice to allo... | 10/14/2008 |
| 7416394 | Gas turbine and rotor blade for a turbomachine The invention relates to a rotating blade for a turbomachine which can be cross flown by a flow medium, especially for a gas turbine which can be cross flown by a working fluid. The gas turbine comprises a rotating blade base, a platform region which extends in a pe... | 08/26/2008 |
| 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 |
| 7281896 | Fan and impeller thereof An impeller includes a hub and at least one blade. In this case, the hub has at least one balancing portion disposed on hub and arranged with respect to a center of the hub. The balancing portion has at least one corner. The blades are disposed around the hub. In ad... | 10/16/2007 |
| 7186091 | Methods and apparatus for cooling gas turbine engine components A method of cooling a gas turbine engine component having a perforate metal wall includes providing a plurality of pores in the wall, wherein the pores extend substantially perpendicularly through the wall, and wherein the pores are covered and sealed closed at firs... | 03/06/2007 |
| 7144220 | Investment casting An article may be manufactured by providing a reticulate core element in a mold shell having a shape at least partially corresponding to a shape of the article. The molten metallic material is introduced to the shell so as to at least partially infiltrate into the r... | 12/05/2006 |
| 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 |
| 7070390 | Component with internal damping A component such as a blade for use in a gas turbine engine comprises a body 2 formed from outer panels 8, 10 defining an internal cavity 12. A damping element 14 is provided in the cavity 12 and is secured at one end between the p... | 07/04/2006 |
| 7037080 | Method of constructing a fan blade An improved fan blade is constructed from a series of wooden slats. Holes are drilled through the wooden slats and a dowel is placed through each of the holes. The dowel is preferably a wooden rod that is secured in the hole with wood glue. Alternatively, the dowels... | 05/02/2006 |
| 7025569 | Axial flow fan with multiple segment blades An axial flow fan with a plurality of segment blades is described. The axial flow fan has a base, a hub and a plurality of blade units. The hub is mounted on, or pivots on, the base and supports the blade units. Each of the blade units is connected to a periphery of... | 04/11/2006 |
| 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 |
| 7008176 | Molecular speed and direction selection A technique of generating a flow from a gas. The technique includes the steps of selecting molecules from the gas on a nanoscopic or microscopic scale, and generating the flow from the selected molecules. The gas can be air. In one embodiment, the molecules are sele... | 03/07/2006 |
| 7001150 | Hollow turbine blade stiffening An apparatus and method for at least one of stiffening a rotor blade of a gas turbine engine and raising a natural vibration frequency of the blade. The blade has a recess extending radially and inwardly into the blade. A reinforcing element is provided in the reces... | 02/21/2006 |
| 6979179 | Wind turbine rotor blade with combined lighting receptor and drain passage and lighting receptor with drain passage The invention relates to a wind turbine rotor blade which in its tip (1) is provided with a lightning receptor (2) and a drain passage (6; 16; 26; 36; 46; 56) connecting the blade interior (11, 12) with the blade exterior, the drain passa... | 12/27/2005 |
| 6969237 | Turbine airfoil cooling flow particle separator A vane assembly for a turbine engine comprising a plurality of vanes each comprising a pressure side wherein the pressure side of at least one of the plurality of vanes comprises at least one opening extending through the pressure side into an interior portion of th... | 11/29/2005 |
| 6960063 | Vortex attractor without a backplate A vortex generating apparatus has the capability of attracting and removably adhering one or more solid objects. The apparatus comprises an impeller housed within a shell. The vortex attractor generates a vortical fluid flow generally in the form of a helical or spi... | 11/01/2005 |
| 6932564 | Heteroscopic turbine A heteroscopic turbine with a Knudsen number of less than ten. In one embodiment, the heteroscopic turbine generates a flow from a gas. The turbine includes at least a moving surface and a plurality of turbine blades on or in said surface. Each of the blades has a h... | 08/23/2005 |
| 6857919 | Impeller for marine propulsion device An impeller for a jet propulsion device includes at least one fluid channel formed on each impeller blade. During impeller rotation, a fluid back-flow is generated through the fluid channels. The back-flow advantageously sweeps cavitation bubbles away from the impel... | 02/22/2005 |
| 6802693 | Vortex attractor with vanes attached to containing ring and backplate A vortex generating apparatus has the capability of attracting and removably adhering one or more solid objects. The apparatus comprises an impeller housed within a shell. The vortex attractor generates a vortical fluid flow generally in the form of a helical or spi... | 10/12/2004 |
| 6692232 | Rotor assembly for disc turbine A disc turbine rotor assembly comprised of spaced-apart discs includes means of spacing apart disc members of said rotor assembly, which allow for local variation and radial expansion under various local operating temperatures, without allowing axial defl... | 02/17/2004 |
| 6629674 | Method and apparatus for modulating airfoil lift An apparatus comprising: an airfoil adapted for generating a lift force; and a first pulse detonation actuator disposed inside the airfoil and adapted for impulsively detonating a fuel/air mixture to produce a pressure rise and velocity increase of combus... | 10/07/2003 |
| 6520741 | Turbomachine blade The object of the invention is to improve the efficiency of a turbomachine blade provided with a reinforced hole for accommodating a damping element. To this end, the raised end faces (12, 13) of the marginal region (11), reinforced toward the hole (10), ... | 02/18/2003 |
| 6454533 | Hollow blade for hydraulic turbine or pump A runner for a hydraulic turbine or pump includes a hub and a plurality of blades extending from the hub at spaced intervals therearound. Each blade includes an inner edge secured to the hub and a distal outer edge, a leading edge and an opposed trailing ... | 09/24/2002 |
| 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 |
| 6354804 | Fluid displacing blade A propeller with five blades is supported from a hub. A series of apertures is distributed relatively evenly across faces of the blades, the apertures extending from one face of a blade to an opposite face of the blade. The axial extent of the apertures i... | 03/12/2002 |
| 6334753 | Streamlined bodies with counter-flow fluid injection A streamlined body has oppositely facing external pressure and suction surfaces that meet to form a leading edge region. Passageways within the body direct pressurized fluid from passageway outlets over the pressure surface toward the leading edge region ... | 01/01/2002 |
| 6155784 | Variable pitch aircraft propeller A propeller for aircraft has a tip-to-tip flex-beam spar and torsionally stiff hollow blades bonded to the spar throughout an outer portion of the blades. The spar has two end caps which are separated from each other at the hub and converge in the outer p... | 12/05/2000 |
| 6155783 | Hollow blade for hydraulic turbine or pump A runner for a hydraulic turbine or pump includes a hub and a plurality of blades extending from the hub at spaced intervals therearound. Each blade includes an inner edge secured to the hub and a distal outer edge, a leading edge and an opposed trailing ... | 12/05/2000 |
| 6135715 | Tip insulated airfoil A turbine airfoil includes a squealer rib extending outwardly from a tip cap to define a tip cavity thereatop. A thermal insulator is disposed in the tip cavity atop the tip cap.... | 10/24/2000 |
| 6123507 | Single port impeller A single port pump impeller includes two pump vanes diverging arcuately and radially from a suction eye to form one open expanding chamber, and includes a blocking wall for closing the remaining, opposite expanding chamber. The two vanes are contained wit... | 09/26/2000 |
| 6007296 | Guide blade for steam turbines A guide blade for steam turbines, having in the blade interior a cavity (18) to which a vacuum is applied, is provided with an opening (3) for drawing off fluid in the region of the trailing blade edge (4). This opening is provided with a porous cover (7)... | 12/28/1999 |
