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| Number | Title | Issue Date |
| 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 |
| 7281900 | Cascade rotor blade for low noise Low-noise airfoils and methods of reducing noise. One embodiment provides an aerodynamic member that includes two body portions coupled to each other. The second body portion includes a plurality of airfoil members in a fixed relationship with each other. Optionally... | 10/16/2007 |
| 7160084 | Blade of a turbine The invention relates to a turbine blade (31) having a root region (33), a tip region (37) and a blade airfoil (35), a rounded portion (73) being formed between the root region (33) and the blade airfoil (35), and rel... | 01/09/2007 |
| 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 |
| 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 |
| 7014425 | Low pressure fan with Y-shaped blades A fan 10 includes a central hub 14, an outer ring structure 18, and a plurality of fan blades 12. Each blade is of generally Y-shaped configuration having first and second separate branches 12a, 12b, respective... | 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 |
| 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 |
| 6932569 | Active control of multi-element rotor blade airfoils A multi-element rotor blade includes an individually controllable main element and fixed aerodynamic surface in an aerodynamically efficient location relative to the main element. The main element is controlled to locate the fixed aerodynamic surface in a position t... | 08/23/2005 |
| 6923624 | Wooden fan blade A wooden fan blade includes an elongated blade body and a rib strip fitted into the elongated blade body. The blade body is made of a wooden plate having wooden fibers extended substantially in parallel to a longitudinal axis of the blade body. The blade body has an... | 08/02/2005 |
| 6840741 | Leading edge slat airfoil for multi-element rotor blade airfoils A leading edge slat for multi-element rotor blade applications which provide multiple benefits and provide design direction which has heretofore been unexplored. ... | 01/11/2005 |
| 6752594 | Split blade frictional damper An improved frictional damper for a rotor blade is positioned inside a cavity in the airfoil section of the blade. The cavity includes an elongated, generally radially-extending opening that divides the airfoil into two sections and an elongated opening transverse t... | 06/22/2004 |
| 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 |
| 6607359 | Apparatus for passive damping of flexural blade vibration in turbo-machinery A rotor blade for a turbine engine rotor assembly is provided comprising a root, an airfoil, a platform, and a means for damping vibrations in the airfoil. The airfoil includes a pocket formed into a chordwise surface. The damper is received into the pock... | 08/19/2003 |
| 6540476 | Centrifugal fan The centrifugal fan of the present invention comprises a frame, a rotatory means and an impeller. Among these, the frame has a first intake, a second intake, at least one air outlet and a plurality of ribs crossing the second intake. The rotatory means mo... | 04/01/2003 |
| 6474942 | Airfoil configured for moisture removal from steam turbine flow path To remove moisture from the steam flow path of steam turbines, one or more grooves are located on the pressure or concave side of the steam turbine stationary and/or rotating airfoils. The grooves are oriented predominantly radially and are disposed close... | 11/05/2002 |
| 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 |
| 6250797 | Mixing impeller system having blades with slots extending essentially all the way between tip and hub ends thereof which facilitate mass transfer An axial flow mixing impeller system for efficient mass transfer by control of size of the bubbles of the fluid which is being dispersed, especially gases and liquids with viscosities greater than the liquid into which dispersion occurs, is obtained by cr... | 06/26/2001 |
| 6168383 | Rotor blade for rotary-wing aircraft A rotor blade (1) comprises a main blade (2) having a substantially fixed chord length (C), a front tip blade (3) having a chord length (C1) smaller than that of the main blade and connected to the main blade so that a front edge (3a) thereof is continuou... | 01/02/2001 |
| 6086328 | Tapered tip turbine blade A turbine blade includes a hollow airfoil extending from an integral dovetail. The airfoil includes sidewalls extending between leading and trailing edges and longitudinally between a root and a tip. The sidewalls are spaced apart to define a flow channel... | 07/11/2000 |
| 6065938 | Rotor for a turbomachine having blades to be fitted into slots, and blade for a rotor A rotor for a turbomachine has slots formed therein at an angle to an axis of rotation of the rotor. Blades have at least one blade root with at least two regions of different rigidity that are adapted and preferably matched to different regions of rigidi... | 05/23/2000 |
| 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 |
| 6007300 | Centrifugal multiblade fan A centrifugal multiblade fan comprises a plurality of curved blades which are circularly arranged about a common rotation axis at evenly spaced intervals defining a curved air flow passage between every neighboring blades. Each curved blade has concave fr... | 12/28/1999 |
| 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 |
| 5562412 | Fan blade with filter A fan apparatus with a filter affixed to one or more of its fan blades such that the rotating fan blades carry the filter or filters through a medium to extract pollutants.... | 10/08/1996 |
| 5403160 | Fan blade configuration A fan blade includes a plate and a board fixed on the plate, an opening is formed in the fan blade for facilitating air circulation when the fan blade is operated. The plate and the board each includes a notch, the notches form the opening when the board ... | 04/04/1995 |
| 5343826 | Fluid indicator assemblies for sight flow apparatus A sight flow apparatus includes a body designed to be connected in-line to fluid pipes within a manufacturing plant or other facility. One or more window assemblies are removably mounted on the sides or ends of the body to allow visual inspection of fluid... | 09/06/1994 |
| 5328330 | Extruded aluminum fan blade A fan blade comprising a body having a tip end and an in-board end is configured with first and second fin portions that extend along the trailing edge of the body of the fan blade. The first fin portion extends from the in-board end of the fan blade alon... | 07/12/1994 |
| 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 |
| 5277550 | Agitating vane A plurality of flat plates are laterally disposed at an outer circumference of a hub and auxiliary vanes are disposed in parallel to at least side edges of each of said flat plates while being spaced apart from the side edges. Accordingly, an occurrence o... | 01/11/1994 |
| 4929152 | Method and apparatus for maintaining a mixture of products at a certain temperature When maintaining a flow of a mixture of products consisting of a liquid of low to medium viscosity incorporating solid particles at a certain temperature and for a certain period of time the mixture remains for some time in a vessel of a substantially cyl... | 05/29/1990 |
| 4913670 | Blade-like profiled device for acting on a gaseous or liquid fluid flow The invention relates to a profiled device configured as a slotted blade head to improve the efficiency in blade-like structural elements that have a gas or a fluid flowing around them such as foils, vanes of jet engines, propellers, keels of ships or the... | 04/03/1990 |
| 4802825 | Method and apparatus for maintaining a mixture of products at a certain temperature When maintaining a flow of a mixture of products consisting of a liquid of low to medium viscosity incorporating solid particles at a certain temperature and for a certain period of time the mixture remains for some time in a vessel of a substantially cyl... | 02/07/1989 |
| 4758129 | Power frame A rotor stage disposed within an annular fluid flowpath in a turbomachine is disclosed. The rotor stage includes outer and inner rings and a plurality of first and second airfoils. The outer and inner rings define flowpath surfaces for said flowpath. The ... | 07/19/1988 |
| 4636143 | Propeller for gaseous and fluidic media A propeller for gaseous and fluidic media, particularly an air propeller which is formed with at least one vane mounted to a hub of the propeller and rotatable about a central axis of the propeller. The vane includes two blades extended in the radial dire... | 01/13/1987 |
| 4615659 | Offset centrifugal compressor An offset centrifugal compressor having a plurality of curved blades associated with a rotor and defining, respectively, inducer and exducer sections with a plurality of the blades being formed of at least three blade parts extending generally end-to-end.... | 10/07/1986 |
| 4599041 | Variable camber tandem blade bow for turbomachines Multiple flat-plate blade rows of pitch adjustable blades are offset mounted in a manner such that when flat-plate blades in adjacent rows are aligned at a specific pitch setting, respective flat-plate blades of the adjacent rows nearly mate. The offset b... | 07/08/1986 |
| 4585392 | Bladed rotor system and pitch controls therefor A rotor system for a helicopter having a power shaft carrying at least one pair of diametrically opposite frames for rocking motion about an axis radially of said shaft. Sets of lift blades carried by the frames, respectively, for rocking motion about rad... | 04/29/1986 |
| 4550259 | Device for converting wind energy into another form of energy The invention relates to a device for converting wind energy into another form of energy comprising a plurality of propellers having equidirectional shafts, being arranged in a matrix and driving associated energy converters. The invention generally propo... | 10/29/1985 |
| 4512718 | Tandem fan stage for gas turbine engines A fan rotor assembly having decreased susceptibility to vibratory damage is disclosed. In one embodiment described the rotor assembly includes a plurality of principal fan blades 22 and a plurality of secondary fan blades 36 associated therewith. The seco... | 04/23/1985 |
