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| Number | Title | Issue Date |
| 8105039 | Airfoil tip shroud damper A turbine disk includes a rotor and a plurality of turbine blades, each comprising a root at a proximal end secured to the rotor and a tip having a shroud at a distal end. The shroud includes a inner diameter surface, an outer diameter surface and a segmented sidewa... | 01/31/2012 |
| 7311494 | Fan and scroll design for high efficiency and low noise A centrifugal fan assembly including a housing having a lower surface and a parallel inlet wall that defines an inlet opening. A shaft is supported by the housing for rotating about an axis. A plurality of fan blades are disposed about the shaft and extend radially ... | 12/25/2007 |
| 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 |
| 7168922 | Plastic fans having improved fan ring weld line strength A method to influence material flow during the injection molding of thermoplastic, polymeric ring type fans such that a major portion of the materials flowing in opposite directions preferably flow past one another, or collide at an angle relative to one another, ra... | 01/30/2007 |
| 7156609 | Method of making complex twisted blades with hollow airfoil cross section and the turbines based on such A reactive turbine, each blade of which approximates a helical shape that is constructed with readily available conventional manufacturing techniques. The blades are constructed in discrete straight sections that, when joined, approximate a helix or any other effici... | 01/02/2007 |
| 7132760 | Wind turbine device A hybrid blade wind turbine device formed of at least a pair of straight outer airfoil blades, and a pair of inner helical wing blades, as supported for rotation within a safety protective cage structure, which wind turbine can be mounted in the vertical, horizontal... | 11/07/2006 |
| 7121505 | Method of control for toy aircraft The invention described here offers a low-cost method of remote flight control suitable for use in toy airplanes and ornithopters (flapping-wing aircraft). To accomplish this, the aircraft is powered by a reversible electric motor. The propeller or flapping wing pro... | 10/17/2006 |
| 7118322 | Device for injecting cooling air into a turbine rotor A device for injecting cooling air into a turbo-machine turbine rotor includes a plurality of injectors distributed regularly around a longitudinal axis of the turbomachine and mounted between an inner shroud and an outer shroud. Each injector has a bimetallic struc... | 10/10/2006 |
| 7118329 | Tip sealing for a turbine rotor blade An unshrouded rotor blade 24 comprising an aerofoil 28, said aerofoil 28 having a leading edge 34, a trailing edge 36, a pressure surface 30 and a suction surface 32, there being provided at a radially outer extremity... | 10/10/2006 |
| 7097428 | Integral cover bucket design A bucket for use on a steam turbine rotor wheel, the bucket comprising a shank portion and an airfoil portion, the airfoil portion having a radially outer tip with a tip cover adapted to be engaged, in use, by a similar tip cover on an adjacent bucket, wherein a rad... | 08/29/2006 |
| 7083387 | Axial flow fan An axial flow fan. The axial flow fan includes an impeller, an annular structure, and a plurality of connecting elements. The impeller has a plurality of blades, arranged radially. Each blade has an outer periphery. The outer periphery has a top portion. The annular... | 08/01/2006 |
| 7070388 | Inducer with shrouded rotor for high speed applications An inducer rotor rotatably mountable in an inducer for pressurizing fluid traveling through the inducer. The inducer rotor includes a hub. The hub has a central axis and a plurality of blades extending radially outward from the hub. Each blade extends from a root po... | 07/04/2006 |
| 7037077 | Radiator fan and engine cooling device using the same Whereas for each propeller blade of a radiator fan, an attachment angle θ1 at a propeller blade base portion, projected onto a plane parallel to an attachment surface of the propeller blades with respect to the boss is set in a range of 35 to 45°, an attach... | 05/02/2006 |
| 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 |
| 6905308 | Turbine nozzle segment and method of repairing same A method is provided for repairing a turbine nozzle segment having at least one vane disposed between outer and inner bands. The method includes separating the inner band from the nozzle segment, and joining the inner band to a newly manufactured replacement casting... | 06/14/2005 |
| 6893220 | Centrifugal fan A centrifugal blower impeller includes a central hub and a plurality of impeller blades. The central hub includes a conical section and an outer edge. The conical section is centered with respect to a center axis and extends from the center axis towards the outer ed... | 05/17/2005 |
| 6877956 | Methods and apparatus for integral radial leakage seal A method and apparatus for fabricating a rotor assembly for a turbine is provided. The method includes forming a cover on each bucket radial tip wherein the cover includes a leading edge side in a direction of rotation, and a trailing edge side in the direction of r... | 04/12/2005 |
| 6866482 | High-performance propeller A high-performance propeller has one hub and a plurality of blades, characterized in that a double-side or a single-side arc brim is provided at the tip of each blade. The propeller of the invention can provide a small induced drag and convert the centrifugal force ... | 03/15/2005 |
| 6854960 | Segmented composite impeller/propeller arrangement and manufacturing method In the embodiments described in the specification, an impeller is manufactured by providing a mold for one angular segment containing one vane of an impeller and corresponding hub and rim portions, injection-molding fiber-reinforced polymer composite resin material ... | 02/15/2005 |
| 6851926 | Variable thickness turbine bucket cover and related method A turbine bucket and cover assembly includes a bucket having a shank portion and an airfoil portion separated by a platform portion; and a bucket cover arranged on a sloped radially outer tip of the airfoil portion, the bucket cover having a radially inner surface m... | 02/08/2005 |
| 6682306 | Moving blades for steam turbine The moving blades are configured so as to meet a condition: (L+3D)×fࣙ14,500 or L×(L+D)×f2ࣙ1.55×10.sup.7, where L is an effective length of the moving blade measured in inches, D is a blade root circle diameter of the moving blades ... | 01/27/2004 |
| 6561765 | Fuel pumps with reduced contamination effects A vehicle regenerative-type fuel pump which reduces the possible accumulation and effects of contamination relative to impellers with outer ring members. The impellers for the pump have outer ring members with non-uniform configurations (slanted, curved, ... | 05/13/2003 |
| 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 |
| 6481963 | Axial-flow fan having an air gap generation member An axial-flow fan device includes a fan frame having an intake opening and an outlet opening, and an impelling apparatus mounted in the fan frame and having fan blades and an air gap generation member surrounding the fan blade. The air gap generation memb... | 11/19/2002 |
| 6406263 | Gas turbine shaft pilot system with separate pilot rings A turbine assembly comprising a first rotatable component having a first lip with a first axial facing surface and a second rotatable component having a second lip with a second axial facing surface. The components are held together by an axial load so th... | 06/18/2002 |
| 6402474 | Moving turbine blade apparatus A moving turbine blade apparatus has a plurality of moving blades (5) adapted to be mounted on a rotor shaft, a plurality of snubber covers (6) formed on outer ends of the moving blades (5), respectively, so as to be arranged successively in a circle havi... | 06/11/2002 |
| 6230792 | Device for attaching an accessory to a heat exchanger The invention relates to a unit comprising an accessory fixed to a heat exchanger comprising fins made of aluminum, this accessory being equipped with bearing surfaces designed to come to rest on the fins. The bearing surfaces are formed on an accessory suppor... | 05/15/2001 |
| 6203278 | Blower wheel with center disc having roughened blade engaging surface A centrifugal blower wheel including a center disc assembly and a blade assembly. The blade assembly includes a plurality of blades, each blade including a notch which is engaged over a peripheral edge of the disc assembly in frictional engagement. The pe... | 03/20/2001 |
| 6102661 | Propeller with annular connecting element interconnecting tips of blades A propeller (10) including a hub (11), a plurality of blades (13) extending outwardly from the hub (11) and part annular connecting elements (17) which interconnect tips (16) of adjacent blades (13). The trailing edges (21) of the elements (17) extend fro... | 08/15/2000 |
| 6095752 | Centrifugal blower impeller, especially for a heating and ventilating, and/or air conditioning, system for a motor vehicle A centrifugal blower impeller for a vehicle heating and ventilation system has a central hub, a peripheral crown having a set of vanes for drawing the air axially through the crown, to deliver the air radially towards the outside, and a set of arms, space... | 08/01/2000 |
| 6053700 | Ducted turbine A turbine 400 has a central duct 410 which accelerates fluid passing through it and a blade configuration which retards the flow of fluid near the tips of the turbine. This structure results in a vortex having a higher fluid pressure behind the tips of th... | 04/25/2000 |
| 6042335 | Centrifugal flow fan and fan/orifice assembly A centrifugal fan including a fan hub lying generally in a plane normal to the axis of fan rotation and having a central opening for receiving a motor housing, and a plurality of fan blades of substantially identical construction spaced circumferentially ... | 03/28/2000 |
| 6027307 | Fan and shroud assembly adopting the fan A fan includes a hub coupled to a driving shaft of a motor, a plurality of blades installed on the outer circumferential surface of the hub to be spaced from each other at a predetermined interval, and a band connecting free ends of the blades. An axial d... | 02/22/2000 |
| 6024536 | Device for introducing and discharging cooling air The object of the invention is to prevent the quantity of airflow by a fan from decreasing in dependence on the distance between the fan and obstacles such as an engine in a device for introducing and discharging cooling air having a shroud with a high co... | 02/15/2000 |
| 5984638 | Turbomachine radial impeller vibration constraining and damping mechanism A compressor blade vibration reduction mechanism for a high-speed radial impeller for minimizing fatigue failures from various excitation sources. The vibration reduction mechanism includes a plurality of loose-fitting lashing pins coupling each impeller ... | 11/16/1999 |
| 5984632 | Motor fan for a cleaning apparatus A motor fan for a cleaning apparatus that creates the suction caused by a rotor in a suction device mounted in the cleaning apparatus such that foreign materials are drawn therein has a fan member coupled to the rotor and is provided with a plurality of c... | 11/16/1999 |
| 5895206 | Fan and heat exchanger assembly A mixed flow fan and heat exchanger assembly is "blow through" in that the fan discharges air into the upstream face of the heat exchanger which provides a flow resistance. The fan is mixed flow so that there are both axial and significant radial componen... | 04/20/1999 |
| 5771961 | Fan module A fan for an automotive radiator has a hub with a group of blades extending radially outwardly from the hub. A support member joins together the outward extensions of the blades in the first group. A second group of blades extend radially outwardly from t... | 06/30/1998 |
| 5437541 | Blade for axial fan A blade for use in an axial fan includes a plurality of vanes which each have a winglet formed on their front face to increase the air flow of the fan at a given blade velocity.... | 08/01/1995 |
| 5413465 | Propulsion device having circular array of inclined airfoil elements with radially-outwardly directed vacuum-inducing surfaces A propulsion device comprises a circular series of inclined airfoil elements. Each airfoil element is connected along its upper side to a rigid plate member, which is adapted to be rotated at high speed via a motor output shaft. The airfoil elements are o... | 05/09/1995 |
