Angular Or Offset Patents (Class 416/237)
  • Patent number: 10830203
    Abstract: A wind turbine blade includes a trailing edge flap having a flap part protruding from the trailing edge on the pressure side of the blade. The flap part has a first section and a second section each having an upstream surface arranged to face an oncoming airflow in use. The first section extends from the trailing edge and has a proximal end and a distal end in cross-section. The proximal end is located at or near the trailing edge and the distal end is spaced apart from the trailing edge. The first section is oriented such that an obtuse angle is defined between the upstream surface of the first section and a plane that extends parallel to the local chordal plane and intersects the proximal end of the first section. The second section is oriented such that the upstream surfaces of the first and second sections together define a concave profile in cross section.
    Type: Grant
    Filed: October 9, 2015
    Date of Patent: November 10, 2020
    Assignee: Vestas Wind Systems A/S
    Inventors: Daniel Whitehouse, Jagjit Bhangal
  • Patent number: 10723451
    Abstract: A propeller blade is provided including a leading edge and a trailing edge. The trailing edge is arranged opposite the leading edge to form an airfoil there between. At least one of the leading edge and the trailing edge include at least one facet.
    Type: Grant
    Filed: April 22, 2014
    Date of Patent: July 28, 2020
    Assignee: SIKORSKY AIRCRAFT CORPORATION
    Inventor: Mark R. Alber
  • Patent number: 10718215
    Abstract: An airfoil for a gas turbine engine comprises at least three successive sections defined between a root and a tip. A first decrease of maximum thickness-to-chord ratios defined by a difference between a maximum thickness-to-chord ratio at the root and a maximum thickness-to-chord ratio at a first spanwise position, a second decrease of the maximum thickness-to-chord ratios defined by a difference between the maximum thickness-to-chord ratio at the first spanwise position and a maximum thickness-to-chord ratio at a second spanwise position, a third decrease of the maximum thickness-to-chord ratios defined by a difference between the maximum thickness-to-chord ratio at the second spanwise position and a maximum thickness-to-chord ratio at the tip, the second decrease being greater than the corresponding first and third decreases.
    Type: Grant
    Filed: November 9, 2017
    Date of Patent: July 21, 2020
    Assignee: PRATT & WHITNEY CANADA CORP.
    Inventors: Raman Warikoo, Krishna Prasad Balike, Keegan Lobo, Hien Duong, Thomas Veitch
  • Patent number: 10690112
    Abstract: A family of dual-winglet rotor blades are designed to dissipate the low energy flow in the wake of a turbine rotor. In some embodiments a dual-winglet having a first winglet transitioning from the lift surface of a rotor blade and a second winglet transitioning from the pressure surface of the rotor blade creates two distinct streams in the wake of the rotor. In one embodiment the first winglet curving away from the lift surface turns the lift force toward the center of the rotor plane while a second, smaller, winglet curving away from the pressure surface of the rotor blade turns the lift force away from the center of the rotor plane. In other embodiments winglets create a virtual shroud that expands the wake to dissipate the low-energy flow in the turbine wake. In another embodiment a dual winglet combines the aforementioned mixing effect with the wake expansion effect.
    Type: Grant
    Filed: June 23, 2017
    Date of Patent: June 23, 2020
    Inventor: William Scott Keeley
  • Patent number: 10428831
    Abstract: A fan blade apparatus for use in a high-volume, low-speed fan wherein the fan blade includes a body portion, a leading edge portion and a trailing portion. The fan blade coupled to an electric motor configured to rotate in an intended direction wherein the leading portion of the fan blade is at the forefront of the rotation of the blade. The leading edge portion of the fan blade includes a series of steps extending along the length of the leading edge. The stepped configuration creates turbulent air flow when the electric motor rotates in the intended direction.
    Type: Grant
    Filed: July 30, 2015
    Date of Patent: October 1, 2019
    Assignee: WLC Enterprises, Inc.
    Inventors: Darrin Walter Niemiec, James C. Muth, Patrick Todd Woodzick, William J. Carlson
  • Patent number: 10335912
    Abstract: In a radiating structure for a main spindle having a tapered bore formed at a distal end of the main spindle, into which a tapered portion of a tool holder is mounted, a key fixing member provided with a drive key is fixed to the distal end of the main spindle, and the drive key is fit into a key groove formed in the tool holder. This configuration prevents a phase shift in rotation direction of the tool holder arising from rotation of the main spindle. A radiating member which exchanges heat with an ambient atmosphere is provided to the key fixing member provided with the drive key.
    Type: Grant
    Filed: August 17, 2016
    Date of Patent: July 2, 2019
    Assignee: FANUC CORPORATION
    Inventor: Toshifumi Muramatsu
  • Patent number: 10047764
    Abstract: In a blade cross-sectional view, assuming that a tangent at an end of the outer periphery is defined as LQ, an imaginary line orthogonal to the rotation axis is defined as LO, an angle formed by the tangent (LQ) and the imaginary line (LO) is defined as an outer peripheral end tangent angle (?), and a position at which an imaginary plane including a position of an intake-side end portion of the bellmouth and a peripheral edge of the blade cross each other is defined as an overlap starting point, the outer peripheral end tangent angle on a trailing edge portion side with respect to a blade cross section including the overlap starting point is set to be smaller than the outer peripheral end tangent angle on a leading edge portion side with respect to the blade cross section including the overlap starting point.
    Type: Grant
    Filed: July 18, 2013
    Date of Patent: August 14, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takahide Tadokoro, Yasuaki Kato, Atsushi Kono
  • Patent number: 10024167
    Abstract: A turbine blade has a profile including a blade suction side line, a blade pressure side line, and a blade trailing edge positioned between the rear ends of the blade suction side and pressure sidelines. The blade trailing edge of the profile is formed by connecting a pressure side arc-like curve having a constant radius of curvature and extending from the rear end of the blade pressure side line toward the camber line of the profile, and a suction side line portion which extends from the rear end of the blade suction side line toward the camber line while passing through a region closer to the camber line than a symmetric curve portion which is line-symmetric to the pressure side arc-like curve with respect to the camber line. The suction side line portion is represented by curves constituting ellipses which constitute ellipses, and a straight line.
    Type: Grant
    Filed: April 30, 2015
    Date of Patent: July 17, 2018
    Assignee: IHI CORPORATION
    Inventors: Masaaki Hamabe, Ayumi Mamada, Ruriko Yamawaki, Hiroshi Hamazaki, Akira Takahashi
  • Patent number: 9863433
    Abstract: The propeller fan includes a boss including a rotation axis, a plurality of blades formed on an outer periphery of the boss, and a bellmouth arranged so as to surround the plurality of blades at a trailing edge side of each of the blades. Each blade has a bending portion that bulges toward an upstream side of the air current in a cross-sectional shape in a radial direction, and a bend of the bending portion of the blade at an inner side of the bellmouth is set to be gentler than a bend of the bending portion of the blade at an outer side of the bellmouth.
    Type: Grant
    Filed: July 8, 2013
    Date of Patent: January 9, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takahide Tadokoro, Yasuaki Kato, Atsushi Kono
  • Patent number: 9845683
    Abstract: A rotor blade for a gas turbine engine according to an exemplary aspect of the present disclosure includes, among other things, an airfoil extending in span between a root region and a tip region and a tip portion extending at an angle from the tip region of the airfoil.
    Type: Grant
    Filed: January 8, 2013
    Date of Patent: December 19, 2017
    Assignee: United Technology Corporation
    Inventor: Donald William Lamb, Jr.
  • Patent number: 9845684
    Abstract: An airfoil in a gas turbine engine includes opposed pressure and suction sides joined together at chordally opposite leading and trailing edges. The pressure and suction sides extend spanwise from a root to a tip of the airfoil. The airfoil has a spanwise distribution of maximum thicknesses of chordwise cross-sections of the airfoil. The spanwise distribution of maximum thicknesses decreases from the root to the tip. In one aspect, the spanwise distribution is stepped between a first portion extending from the root and a second portion extending to the tip.
    Type: Grant
    Filed: November 25, 2014
    Date of Patent: December 19, 2017
    Assignee: PRATT & WHITNEY CANADA CORP.
    Inventors: Raman Warikoo, Krishna Prasad Balike, Keegan Lobo, Hien Duong, Thomas Veitch
  • Patent number: 9790796
    Abstract: An airfoil is disclosed herein. The airfoil may include a leading edge, a trailing edge, a suction side defined between the leading edge and the trailing edge, and a pressure side defined between the leading edge and the trailing edge opposite the suction side. The pressure side may include a concave profile about the trailing edge that varies from a profile of a remainder of the pressure side.
    Type: Grant
    Filed: September 19, 2013
    Date of Patent: October 17, 2017
    Assignee: General Electric Company
    Inventors: John David Stampfli, Ajay Keshava Rao, Rudolf Konrad Selmeier
  • Patent number: 9732728
    Abstract: A wind turbine assembly comprising a generally cylindrical wind turbine rotor that is supported by a rotor support and operable to rotate about a rotational axis, the rotor comprising a plurality of aerofoil blades with each aerofoil blade having a leading edge, a trailing edge, a suction surface, a pressure surface, and an aerofoil chord having a chord length between the leading edge and the trailing edge, the aerofoil blades being in a generally cylindrical arrangement around the rotational axis with the leading edges at a larger radial separation from the rotational axis than the trailing edges, and the chords being angled relative to radii through the rotational axis such that the suction surfaces and pressure surfaces respectively face generally outwardly and inwardly from and to the rotational axis, wherein the minimum separation (S) between the leading edge of a first aerofoil and the suction surface of an adjacent aerofoil is less than the chord length (LC), and wherein the location of the maximum thi
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: August 15, 2017
    Assignee: The Power Collective Ltd
    Inventor: Winston Donald Keech
  • Patent number: 9334874
    Abstract: The invention relates to dimensioning rules for a blade of an axial flow impeller. The dimensioning rules relate to: (i) the lengthwise dimension from the axis of rotation of the impeller to the tip of the blade; (ii) the widthwise dimension of the blade perpendicularly to the lengthwise direction; and (iii) respective angles for a plurality of folds of the blade. The invention also relates to an axial flow impeller having such blades.
    Type: Grant
    Filed: February 18, 2013
    Date of Patent: May 10, 2016
    Assignee: Outotec (Finland) Oy
    Inventors: Jiliang Xia, Niclas Tylli, Tuomas Hirsi
  • Patent number: 9156153
    Abstract: A rotary tool includes a motor having an output shaft, the output shaft defining an axis of rotation. The motor is configured to rotate the output shaft in a first direction about the axis of rotation. An accessory tool retention mechanism is attached to a distal end portion of the output shaft and configured to releasably retain an accessory tool in alignment with the axis of rotation. A fan mechanism includes a plurality of fan blades attached to the accessory tool retention mechanism and extending radially outwardly therefrom. The plurality of fan blades are configured to move air forwardly in a direction that is generally parallel to the axis of rotation as the accessory tool retention mechanism is rotated in the first direction by the output shaft.
    Type: Grant
    Filed: July 19, 2012
    Date of Patent: October 13, 2015
    Assignee: Robert Bosch GmbH
    Inventors: Christopher Ryan Dvorak, Balazs Nagy, Wayne F. Adolf, Edward G. Ennis, Jie Liu
  • Patent number: 9057359
    Abstract: A blade, for a rotor of a wind turbine has a profiled contour in a radial direction is divided into a root region with a substantially circular or elliptical profile closest to the hub and an airfoil region with a lift generating profile furthest away from the hub. A transition region between the root region and the airfoil region has a profile gradually changing in the radial direction from the circular or elliptical profile of the root region to the lift generating profile of the airfoil region, and the airfoil region comprises at least a first longitudinal segment extending at least 20% of a longitudinal extent of the airfoil region. The first longitudinal segment has a first base part with a cross-sectional profile such that, when impacted by an incident airflow at an angle of attack of 0 degrees has a lift coefficient, which is 0 or less.
    Type: Grant
    Filed: May 18, 2010
    Date of Patent: June 16, 2015
    Assignee: LM GLASFIBER A/S
    Inventors: Peter Fuglsang, Stefano Bove, Lars Fuglsang
  • Patent number: 9033674
    Abstract: Provided is a propeller fan including a hub having an oval shape in an axial direction, a plurality of wings that extend from the hub, and at least one reinforcement rib that extends from the hub and is formed closer to a leading edge of each of the plurality of wings. Through this configuration, the propeller fan has blowing efficiency and stiffness, and the weight and material cost of the propeller fan can be reduced.
    Type: Grant
    Filed: June 28, 2013
    Date of Patent: May 19, 2015
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Keun Jeong Jang, Byung Ghun Kim, Jong Moon Kim, Young Jae Kim, Hyeong Joon Seo
  • Publication number: 20150044057
    Abstract: An impeller blade formed of a central base portion having a center axis. At least a pair of impeller blades is extended outwardly from the central base portion, with each impeller blade further including an extension. A leading edge is formed on each of the impeller blades, with each leading edge being defined by an outer periphery of the central base portion, and each leading edge having at least a portion that forms a continuous curve with a radius decreasing outwardly toward a radial tip of the corresponding impeller blade, wherein the continuous decreasing radius curve of each leading edge is formed by a portion of an ellipse centered on the center axis, a short axis of the ellipse being equal to a long axis thereof divided by approximately three and one-half. Each blade extension is projected from the corresponding impeller blade opposite of the leading edge.
    Type: Application
    Filed: August 12, 2013
    Publication date: February 12, 2015
    Inventor: Jay G. Dinnison
  • Patent number: 8944775
    Abstract: A wind turbine blade with a flow guiding device attached to a profiled contour on a pressure side of the blade is described. The flow guiding device extends along at least a longitudinal part of a transition region of the blade and is arranged so as to generate a separation of airflow along at least a central longitudinal portion of the flow guiding device from the pressure side of the blade at a point between the flow guiding device and a trailing edge of the blade, when the blade is impacted by an incident airflow. The inflow surface, in at least the central longitudinal portion, is formed so that, for each transverse cross-section, a end point tangent to the inflow surface at the end point crosses the profiled contour at a crossing point, where the profiled contour has a profile tangent to the profiled contour, and wherein an angle between the profile tangent and the end point tangent is at least 45 degrees.
    Type: Grant
    Filed: October 26, 2009
    Date of Patent: February 3, 2015
    Assignee: LM Glasfiber A/S
    Inventors: Peter Fuglsang, Kaja Lenz
  • Patent number: 8944776
    Abstract: A wind turbine blade with a flow guiding device attached to a profiled contour on a pressure side of the blade is described. The flow guiding device extends along at least a longitudinal part of a transition region of the blade and is arranged so as to generate a separation of airflow along at least a central longitudinal portion of the flow guiding device from the pressure side of the blade at a point between the flow guiding device and a trailing edge of the blade, when the blade is impacted by an incident airflow. The flow guiding device is arranged at a relative chordal position, seen from the leading edge of the blade, lying in an interval between 40% and 92%. The relative height of the flow guiding device is at least 10% of a maximum thickness of the profiled contour.
    Type: Grant
    Filed: October 26, 2009
    Date of Patent: February 3, 2015
    Assignee: LM Glasfiber A/S
    Inventors: Kaja Lenz, Peter Fuglsang, Sudhakar Piragalathalwar
  • Patent number: 8939708
    Abstract: A universal spherical reaction turbine for any flowing fluid at any depths or elevation that is capable of unidirectional rotation under reversible flow conditions. The turbine includes a rotatable shaft that is adapted to rotate about an axis of rotation; turbine blade support members that are fixedly attached to the rotatable shaft and a plurality of meridian turbine blades. The meridian turbine blades are fixedly attached to diametrically-opposite points that define a geometrical north-south meridian axis that is oriented at a skew angle to the axis of rotation of the rotatable shaft. The skew angle is greater than zero and less than 180 degrees, and, more preferably, between 25 and 35 degrees. The skewing ensures that those turbine blades that are attached to the diametrically-opposite points move on a helical trajectory with respect to the axis of rotation.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: January 27, 2015
    Assignee: Northeastern University
    Inventor: Alexander M. Gorlov
  • Publication number: 20150003994
    Abstract: A wind turbine blade is provided. The wind turbine blade includes a root region, a tip region, and a body extending from the root region to the tip region. The tip region includes a first winglet and a second winglet that extend arcuately away from one another.
    Type: Application
    Filed: June 27, 2013
    Publication date: January 1, 2015
    Inventors: Mark Edward Braaten, Anurag Gupta, Arathi Kamath Gopinath
  • Patent number: 8882470
    Abstract: A rotor according to a preferred embodiment of the invention has at least one blade arranged at a hub of the rotor, wherein the blade has a curvature between its leading edge and its trailing edge which curvature has a first convex surface and an opposite second concave surface, wherein the first surface is to be arranged against the direction of the wind striking the blades. The convex profile of the first surface and the concave profile of the opposite second surface are spaced by the thickness of the blade which is preferably constant. The hub is arranged at the rotational axis.
    Type: Grant
    Filed: July 12, 2011
    Date of Patent: November 11, 2014
    Inventor: Fritz Unger
  • Patent number: 8827649
    Abstract: A fan assembly according to an exemplary embodiment of the present invention includes: a hub; and a plurality of blades including a leading edge corresponding to a side hit by air and a trailing edge corresponding to an opposite side of the leading ledge, the plurality of blades configured to be extended radially from an outer peripheral surface of the hub, wherein each of the plurality of blades includes a first part extended radially from the outer peripheral surface of the hub, a bent part stepped on the end of the first part, and a second part further extended radially on the end of the bent part.
    Type: Grant
    Filed: July 12, 2011
    Date of Patent: September 9, 2014
    Assignee: LG Electronics Inc.
    Inventors: Myoungju Kang, Jindong Kim, Hosan Kim
  • Publication number: 20140205459
    Abstract: A high output bent fin type of fan wheel for use in appliances such as but not limited to microwave ovens. The fan wheel is made by single 90-degree bends for each fan blade relative to the flat mounting plate. Unique to fan wheel is the large fan blade surface area in relation to the total area of the metal used in wheel.
    Type: Application
    Filed: January 16, 2014
    Publication date: July 24, 2014
    Applicant: STANDEX INTERNATIONAL CORPORATION
    Inventor: Michael J. Dobie
  • Publication number: 20140127030
    Abstract: A wind turbine blade system having a main blade having a root and a tip, and at least one secondary blade secured to or formed integrally with the main blade about the tip, the at least one secondary blade being shaped and dimensioned to form, when the main blade is rotated, a shroud circumscribing a swept area of the main blade in order to improve the airflow past the main blade during operation of the wind turbine.
    Type: Application
    Filed: October 22, 2013
    Publication date: May 8, 2014
    Inventors: James SMYTH, Gerard SMYTH, Andrew SMYTH, David SMYTH, Peter SMYTH
  • Publication number: 20140086754
    Abstract: A propeller fan may strongly draw the flow toward the inner circumferential side and greatly improve the pressure efficiency by degrading the tendency of the flow near the pressure surface to be inclined toward the outer circumferential side at the trailing edge of the blade. The blade is provided with a recessed portion raised toward a suction surface at a central portion of a trailing edge of the blade in a radial direction such that the recessed portion is open at least on a pressure surface of the blade, the recessed portion extending from the trailing edge toward a leading edge of the blade, and a cross section of the recessed portion taken in a radial direction is provided with a pair of lateral portions rising at a predetermined angle with respect to the suction surface and facing each other. The span-wise width of the recessed portion between the lateral portions increases as the recessed portion extends from an upstream side to a downstream side.
    Type: Application
    Filed: September 23, 2013
    Publication date: March 27, 2014
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sato Seiji, Suguru Nakagawa
  • Patent number: 8668459
    Abstract: A turbine assembly has a casing, a turbine ring and a blade. The blade has a root portion having an axially extending first shape, an airfoil attaching to the root portion and having a trailing edge and a radially outward tip. The tip has a first portion disposed in parallel to the axis of rotation for minimizing escape of air between the tip and the casing and a second portion extending aft from the first portion at an inward angle. The ring has a cut-out having a second shape mating with the first shape.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: March 11, 2014
    Assignee: Hamilton Sundstrand Corporation
    Inventor: Shihming Jan
  • Patent number: 8668446
    Abstract: A supersonic compressor rotor. The supersonic compressor rotor includes a rotor disk that includes an upstream surface, a downstream surface, and a radially outer surface that extends generally axially between the upstream surface and the downstream surface. The radially outer surface includes an inlet surface, an outlet surface, and a transition surface that extends between the inlet surface and the outlet surface. A plurality of vanes are coupled to the radially outer surface. Adjacent vanes form a pair and are oriented such that a flow channel is defined between each pair of adjacent vanes. The flow channel extends between an inlet opening and an outlet opening. The inlet surface defines an inlet plane that extends between the inlet opening and the transition surface. The outlet surface defines an outlet plane that extends between the outlet opening and the transition surface that is not parallel to the inlet plane.
    Type: Grant
    Filed: August 31, 2010
    Date of Patent: March 11, 2014
    Assignee: General Electric Company
    Inventors: Douglas Carl Hofer, Zachary William Nagel, David Graham Holmes
  • Patent number: 8641382
    Abstract: A turbocharger includes a plurality of blades (7; 7?) which are arranged in a turbine casing (2). Each blade has the following: a profile underside (8; 8?) and a profile top side (9; 9?) which determine the blade thickness, a blade leading edge (10; 10?) at a first intersection of the blade underside (8; 8?) and the blade top side (9; 9?), a blade trailing edge (11; 11?) at a second intersection of the blade underside (8; 8?) and the blade top side (9; 9?), a profile center line (12; 12?) which is defined by the blade underside (8; 8?) and the blade top side (9; 9?) and runs between them from the blade leading edge (10; 11?) to the blade trailing edge (11; 11?), and in which the profile center line (12; 12?) runs in a wave-like manner.
    Type: Grant
    Filed: November 24, 2006
    Date of Patent: February 4, 2014
    Assignee: BorgWarner Inc.
    Inventors: Mathias Weber, Jochen Zuck, Dietmar Metz
  • Patent number: 8591195
    Abstract: A turbine blade adapted for mounting to a turbine rotor includes a root portion, and an airfoil portion extending outward from the root portion and defining a blade tip at an outermost end thereof. The airfoil portion having a pressure side and a suction side opposite the pressure side, and including a stiffening rib disposed at the blade tip. The stiffening rib projects from the pressure side of the airfoil portion of the turbine blade.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: November 26, 2013
    Assignee: Pratt & Whitney Canada Corp.
    Inventors: Domenico Di Florio, Aldo Abate
  • Patent number: 8480372
    Abstract: A system including an airfoil portion of an unshrouded turbine bucket, which includes a pressure-side surface and suction-side surface each extending from a root surface to a tip surface and joined at a leading edge and a trailing edge, the pressure-side surface having a generally concave shape and the suction-side surface having a generally convex shape; the airfoil portion having an increasing stagger angle in a span-wise direction from the root surface to the tip surface and an increasingly loaded suction-side surface as the suction-side surface approaches the tip surface and the tip surface approaches the leading edge, the airfoil portion having a resultant lean in a direction of the suction-side surface as the leading edge approaches the tip surface, and the pressure-side surface and the suction-side surface each having a locally reduced or reversed curvature in a direction of the pressure-side surface at their intersection with the tip surface.
    Type: Grant
    Filed: November 6, 2008
    Date of Patent: July 9, 2013
    Assignee: General Electric Company
    Inventor: Scott Matthew Sparks
  • Patent number: 8469663
    Abstract: Method and apparatus for converting the kinetic energy of a moving fluid stream into useful work by using a parallel cascade of aerofoils or hydrofoils positioned therein. The foils may be provided with at least two degrees of freedom and adjacent foils move in antiphase. The foils are subjected to resonant oscillations, known as flutter, induced by the fluid flow. Profiled inflow and outflow ducts may be positioned upstream and downstream, and the apparatus may be enclosed in a profiled duct, to increase efficiency by altering the fluid velocity and pressure. The foils are cantilevered, supported by vertical rods but are otherwise unattached. A cascade comprised of independent foil modules, each including a foil, a power conversion module and a motion control module, may be programmed to (1) receive energy from a fluid stream to generate power, or (2) transfer energy into a fluid stream to create propulsion or pumping.
    Type: Grant
    Filed: June 1, 2006
    Date of Patent: June 25, 2013
    Assignee: ResHydro LLC
    Inventor: Colin C. Kerr
  • Publication number: 20130149108
    Abstract: A blade having a root portion and an aerofoil portion, wherein the aerofoil portion has a tip remote from the root portion, and a leading edge and a trailing edge, and wherein the tip of the aerofoil portion has a set-back portion extending from the leading edge or the trailing edge of the aerofoil portion part way towards the respective other edge and set back from the remainder of the tip of the aerofoil portion towards the root portion.
    Type: Application
    Filed: August 4, 2011
    Publication date: June 13, 2013
    Applicant: ROLLS-ROYCE PLC
    Inventor: John R. Webster
  • Patent number: 8430638
    Abstract: A noise reducer for a rotor blade of a wind turbine and a rotor blade assembly are disclosed. The rotor blade assembly includes a rotor blade having exterior surfaces defining a pressure side, a suction side, a leading edge and a trailing edge each extending between a tip and a root. The rotor blade further defines a span and a chord. The rotor blade assembly further includes a noise reducer configured on the rotor blade. The noise reducer includes a plurality of rods each having a body extending between a first end and a second end. The body of each of the plurality of rods contacts and extends parallel to the body of a neighboring rod of the plurality of rods when the noise reducer is in a stable position.
    Type: Grant
    Filed: December 19, 2011
    Date of Patent: April 30, 2013
    Assignee: General Electric Company
    Inventors: Roger Drobietz, Ariane Frere, Andreas Herrig, Wendy Wen-Ling Lin
  • Publication number: 20130045106
    Abstract: An article is disclosed that includes a substrate having a first surface and a second surface and a coating disposed on the second surface. In addition, the article includes an angled trench at least partially defined in the coating. The angled trench may include a bottom surface, a first sidewall and a second sidewall disposed downstream of the first sidewall. The first and second sidewalls may extend from the bottom surface at an angle of less than about 60 degrees. Moreover, the article may include a plurality of holes defined between the first surface and the bottom surface.
    Type: Application
    Filed: August 15, 2011
    Publication date: February 21, 2013
    Applicant: GENERAL ELECTRIC COMPANY
    Inventor: Benjamin Paul Lacy
  • Patent number: 8371819
    Abstract: Provided is a quiet propeller including a propeller blade having such a pitch angle not at its root portion but at its blade end edge portion with respect to a relative flow in the rotational direction, as to raise the internal pressure of a liquid thereby to eliminate a cavity, a water bubble or a cavitation at the blade root portion at the time of a high-speed rotation so that the propeller is rotated at a high speed by a small prime mover and by a prime mover capable of moving much fluid backward. In the quiet propeller, a propeller blade is curved backward at its leading end portion to form a slope portion, and a rotational front side end portion in the slope portion is formed into an arcuate shape in the side view whereas a rotational rear side end portion is so gradually extended backward from the rotational front side end portion as to become straight from the blade root to the blade end, thereby to form a deflecting slope face.
    Type: Grant
    Filed: October 31, 2006
    Date of Patent: February 12, 2013
    Assignee: Kabushiki Kaisha Bellsion
    Inventor: Masahiko Suzuki
  • Patent number: 8251663
    Abstract: An impeller is provided for a pump unit, in particular for a waste water pump unit, having two cover plates (2, 4), which are spaced apart from one another in the axial direction (X) and are connected to one another by at least one connecting element (8). The impeller has at least one blade (12, 14) which is arranged between the two cover plates (2, 4) and extends from an inner diameter of the impeller to an outer diameter of the impeller. The blade (12, 14) has a continuous slot (16), which extends from the edge (22, 24) of the blade (12, 14) which is situated at the inner diameter to the edge (26, 28) of the blade (12, 14) which is situated at the outer diameter. A pump unit is also provided having an impeller of this type.
    Type: Grant
    Filed: December 13, 2006
    Date of Patent: August 28, 2012
    Assignee: Grundfos Management A/S
    Inventors: Lasse Ilves, Heikki Yli-Korpela
  • Fan
    Patent number: 8235672
    Abstract: A fan includes a hub and a plurality of blades formed on the hub with a rake angle. In an axial direction of the hub, no part of a trailing edge of any of the blades is disposed past an air outlet end of the hub at more than a distance approximately equal to 25% of a diameter of the hub.
    Type: Grant
    Filed: July 21, 2008
    Date of Patent: August 7, 2012
    Assignee: LG Electronics Inc.
    Inventors: Seok Ho Choi, Deok Huh
  • Patent number: 8231343
    Abstract: Provided is an axial fan apparatus including a housing and an axial-flow impeller. The axial-flow impeller is capable of rotating inside the housing and includes a plurality of axial-flow wings each having a negative pressure generation surface for generating a negative pressure, and an auxiliary vane standing on the negative pressure generation surface at an end portion of each of the plurality of axial-flow wings.
    Type: Grant
    Filed: March 10, 2008
    Date of Patent: July 31, 2012
    Assignee: Sony Corporation
    Inventors: Shun Kayama, Yukiko Shimizu, Kazutoshi Yamamoto
  • Patent number: 8226363
    Abstract: A turbine wheel for a gas operated medical handpiece includes a plurality of blades which extend in radial direction from a hub and extend in axial direction from a side ring web of the turbine wheel, and the front side of which is substantially concavely curved about an approximately radially running first axis of curvature. In order to increase the drive power or to better exploit the drive power at least one blade has at least in an axial end region an inclination surface which is inclined in the axial direction towards the front side.
    Type: Grant
    Filed: March 23, 2010
    Date of Patent: July 24, 2012
    Assignee: Kaltenbach & Voigt GmbH
    Inventors: Alexander Flock, Helmut Gruber, Thomas Roesch
  • Patent number: 8220986
    Abstract: A mixer impeller having high efficiency blades. The impeller may include a central hub and a plurality of blades attached to and extending radially outwardly from the hub such that leading edges thereof are inclined upwardly from trailing edges thereof.
    Type: Grant
    Filed: November 19, 2008
    Date of Patent: July 17, 2012
    Assignee: Chemineer, Inc.
    Inventors: Eric Edward Antonio Janz, Kevin J. Myers, William Fryers, Julian B. Fasano
  • Patent number: 8177484
    Abstract: An impeller of a blower is disposed with circular support plates that are made of a resin and rotate about an axis of rotation and a plurality of blades that are made of a resin. The blades are disposed on outer peripheral portions of the circular support plates so as to be parallel to an axis of rotation, and serrated shapes are formed on the blades by cutting out blade tips at plural places. Additionally, a step is formed in a blade face of each of the blades at a position a predetermined distance from the blade tip where the serrated shape is formed.
    Type: Grant
    Filed: September 26, 2006
    Date of Patent: May 15, 2012
    Assignee: Daikin Industries, Ltd.
    Inventors: Kazuya Haraguchi, Yoshinori Kagawa, Hideshi Tanaka, Kouzou Yoshinaga
  • Patent number: 8172518
    Abstract: A method for assembling a rotor assembly and a rotor assembly are provided. The method comprises providing a rotor blade including a first sidewall, a second sidewall, where the first and second sidewalls are connected at a leading edge and a trailing edge and extend in span from a root portion to a tip portion, removing blade material from the tip portion to form a tip portion rake angle that enables the tip portion to extend obliquely between the first and second sidewalls, and coupling the rotor blade to a shaft such that during tip rubs the tip portion rake angle facilitates reducing radial loading induced to the blade during tip rubs.
    Type: Grant
    Filed: December 29, 2006
    Date of Patent: May 8, 2012
    Assignee: General Electric Company
    Inventors: William Carl Ruehr, Michael Harvey Schneider, Sunil Kumar Sinha, Jay L. Cornell
  • Patent number: 8162602
    Abstract: A cylindrical casing for a turbomachine that is suitable for receiving a rotor fitted with at least one bladed wheel is disclosed. The casing includes a device for preventing instability during contact between the casing and the bladed wheel. The device includes a succession of elements disposed around the circumference of the casing, and presenting different stiffnesses between two adjacent elements. The number of elements having the same stiffness not being equal to a multiple of the wave number of the vibratory mode of the bladed wheel that is to be inhibited. The invention is applicable to a compressor, a turbine, or a fan.
    Type: Grant
    Filed: April 22, 2009
    Date of Patent: April 24, 2012
    Assignee: SNECMA
    Inventors: Mathieu Caucheteux, Francois Maurice Garcin, Jean-Pierre Francois Lombard, Nicolas Christian Triconnet
  • Patent number: 8118555
    Abstract: A fluid-flow machine, especially for an aircraft engine, includes a rotor having rotor blades 3. The rotor blades 3 include, on a suction side 9, at least two zones of different surface finish, with one zone being positioned between a rotor blade 3 leading edge 5, a casing line 1, a line SLM and a line EL and being provided with a boundary layer-energizing surface structure, with the line SLM being a meridional flow line at a Mach number-critical blade height of the rotor, and with the line EL being a connecting line of all points E to form a chord-orthogonal projection line EL.
    Type: Grant
    Filed: February 4, 2008
    Date of Patent: February 21, 2012
    Assignee: Rolls-Royce Deutschland Ltd & Co KG
    Inventor: Volker Guemmer
  • Patent number: 8113782
    Abstract: An impeller structure includes a hub having a central spindle, and an impeller. The impeller has a top connection ring, a bottom connection ring, a pressure-retaining ring and a plurality of blades vertically arranged around the periphery of the hub. A top side outer edge of each blade is connected with a top connection ring, an bottom side of the inner side of the blade is connected with a bottom connection ring, the outer side is connected with the pressure-retaining ring, and a plurality of ribs extend outwards from the bottom edge of the periphery of the hub connecting with the bottom connection ring. A pressure relief hole is provided between the pressure-retaining ring and the bottom connection ring. When air passes through the pressure relief hole, a pressure effect is generated, increasing air pressure and volume of blower, alleviating turbulence. The pressure-retaining ring also reinforces the blade strength.
    Type: Grant
    Filed: March 27, 2008
    Date of Patent: February 14, 2012
    Assignee: Sunonwealth Electric Machine Industry Co., Ltd.
    Inventors: Alex Horng, Chen-His Lee
  • Patent number: 8075273
    Abstract: A winglet is coupled with an end of a fan blade. The fan blade has an upper surface, a lower surface, a leading edge, and a trailing edge. The fan blade defines a chord and a maximum thickness. The winglet comprises a substantially vertical member that has a perimeter defined by a lower edge, an upper edge, and a rear edge, which meet at rounded corners. The rear edge of the vertical member has a length that is greater than the maximum thickness of the end of the fan blade. The vertical member has a length that is greater than the chord of the fan blade. The rear edge of the vertical member protrudes rearwardly relative to a vertical plane tangential to the trailing edge of the end of the fan blade. A mounting member may extend from the vertical member to couple the winglet with the fan blade.
    Type: Grant
    Filed: December 30, 2009
    Date of Patent: December 13, 2011
    Assignee: Delta T Corporation
    Inventor: Richard Michael Aynsley
  • Patent number: 8070447
    Abstract: A ceiling fan comprising a disc-like stator provided with a fixed shaft at the center, an annular rotor disposed in proximity to the periphery of the stator, a supporting frame fixed to the rotor and rotatably supported by the fixed shaft; a fan blade fixed to the supporting frame; and a retaining member having one end fixed to the supporting frame together with the fan blade and the other end coupled to the fan blade, wherein the fan blade comprises a root portion fixed to the supporting frame, a blade portion coupled with the retaining member, and an offset portion formed by bending between the root portion and the blade portion, thereby preventing the fan blade from being damaged easily even when it is impressed with a load and ensuring the safety even if the fan blade is broken since the blade portion is held coupled to the rotor side.
    Type: Grant
    Filed: January 21, 2010
    Date of Patent: December 6, 2011
    Assignee: Panasonic Corporation
    Inventors: Shigeo Itou, Kiminobu Yamamoto, Tetsuji Kawazu
  • Patent number: 8025484
    Abstract: A fan rotor assembly has an inner rotor, an outer rotor, a central retainer and a central shaft. The inner rotor has multiple first blades. The outer rotor is stacked on the inner rotor and has multiple second blades. The central retainer is mounted through the inner and outer retainers. The central shaft is mounted in the central retainer under the inner rotor. The fan rotor assembly with first and second blades provides excellent airflow.
    Type: Grant
    Filed: January 3, 2008
    Date of Patent: September 27, 2011
    Assignee: Profan Technology Corp.
    Inventor: Han-Chou Sun