Patents Examined by Kimya N McCoy
  • Patent number: 6779973
    Abstract: The pressure ratio &Dgr;P4S of a final stage moving blade is reduced. As a result, the Mach number in the final stage moving blade can be suppressed, and in the gas turbine operating at a pressure ratio of 20 or more, therefore, decline of turbine efficiency due to shock wave loss can be prevented securely.
    Type: Grant
    Filed: December 6, 2001
    Date of Patent: August 24, 2004
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Eisaku Ito, Kazuo Uematsu
  • Patent number: 6769876
    Abstract: A centrifugal ventilator fan, which has improved fan performance and lower noise. A first outlet angle, on an upstream end of the fan, is less than a second outlet angle. Additionally, the first outlet angle is equal to zero degrees or greater and five degrees or less, while the second outlet angle is equal to thirty degrees or greater and forty five degrees or less. Furthermore, a first inlet angle, on an upstream end, is greater than a second inlet angle, on the opposite end. The first inlet angle is equal to sixty-five degrees or greater and ninety degrees or less, and the second inlet angle is equal to fifty-five degrees or more and seventy-five degrees or less.
    Type: Grant
    Filed: September 16, 2002
    Date of Patent: August 3, 2004
    Assignees: Nippon Soken, Inc., Denso Corporation
    Inventors: Masaharu Sakai, Kouji Matsunaga, Yasushi Mitsuishi, Yoshiki Tada
  • Patent number: 6767183
    Abstract: A method enables a variable vane assembly for a gas turbine engine to be coupled to an engine casing. The variable vane assembly includes a bushing assembly and at least one variable vane that includes a platform and a vane stem. The method comprises coupling a first bushing to the engine casing in a press fit, coupling a second bushing to the variable vane, and coupling the variable vane to the engine casing such that at least a portion of the first bushing is between the engine casing and the second bushing, and such that at least a portion of the second bushing is between the first bushing and the vane stem.
    Type: Grant
    Filed: September 18, 2002
    Date of Patent: July 27, 2004
    Assignee: General Electric Company
    Inventors: Jan Christopher Schilling, Thomas George Wakeman, Steward Joseph Cline
  • Patent number: 6764280
    Abstract: A multi-bladed tail rotor assembly is disclosed that provides higher aerodynamic performance, damage tolerant design with 10,000-hour life expectancy, and which requires low maintenance through the use of composites and elastomerics. The tail rotor hub assembly includes two stacked yoke assemblies having multi-bladed teetering rotors, each mounted on a single drive mast. Each yoke assembly includes a yoke hub having a transverse bore therethrough, a bearing assembly disposed within the bore, and retention means for aligning and securing the bearing assembly within the bore. Each bearing assembly includes a trunnion portion having trunnion arms that extend outwardly from a trunnion body portion, and an elastomeric bearing disposed about each trunnion arm. The tail rotor assembly utilizes a composite twist strap flexure to accommodate collective pitch control integral with each rotor blade.
    Type: Grant
    Filed: March 4, 2002
    Date of Patent: July 20, 2004
    Assignee: Bell Helicopter Textron Inc.
    Inventors: Ajay Sehgal, Cecil Covington, David Haynie, Joseph Zierer, Eric Boyle
  • Patent number: 6755612
    Abstract: A guide vane is adapted to be mounted in an annular fluid-conveying duct of a gas turbine engine, and has an aerofoil part which extends radially across the duct when the guide vane is thus-mounted. On a transverse cross-section relative to the direction of intended fluid flow across the aerofoil part, at least a portion of the aerofoil part is S-shaped.
    Type: Grant
    Filed: September 3, 2002
    Date of Patent: June 29, 2004
    Assignee: Rolls-Royce plc
    Inventors: Shahrokh Shahpar, Mark D Taylor
  • Patent number: 6752598
    Abstract: The invention relates to a device for immobilizing blades in the peripheral slot of a turbomachine disk. Said blades comprise roots of the hammer head type adapted to be introduced into said slot through a loading window and held in said slot by collaboration of shape with the sidewalls thereof. Said immobilizing device is adapted to be introduced into said slot through said loading window and comprises a locking element arranged in a space separating two adjacent blade roots. Said locking element is adapted to be raised up into a lock housing formed in the sidewalls of said slot under the action of a radial manipulating screw the head of which rests against the bottom of the slot, a radial clearance being provided between the bottom of the slot and the underside of the blade roots, and said screw head being restrained in a radially outward direction by said two adjacent blade roots.
    Type: Grant
    Filed: November 21, 2002
    Date of Patent: June 22, 2004
    Assignee: SNECMA Moteurs
    Inventors: Bruno Antunes, Jean-Pierre Paul Henri Caubet, Alain Jean Charles Chatel, Laurernt Dezouche, Nicolas Smirr
  • Patent number: 6749399
    Abstract: A wind turbine with an array of rotors arranged at various heights. Each rotor is optimized for the height at which it is located. Optimization of each rotor could include selection of rated power, solidity, tip speed, blade twist, blade taper, or rotor diameter. Each rotor can also be operated in a manner that is optimized for the wind speed it experiences. Optimized operation parameters could include blade pitch angle or rotor speed.
    Type: Grant
    Filed: March 7, 2002
    Date of Patent: June 15, 2004
    Assignee: Ocean Wind Energy Systems
    Inventor: William E. Heronemus
  • Patent number: 6746206
    Abstract: A centrifugal pump wherein a threaded ring is secured in its position by way of a pressure body which presses it against the axial abutment of a pump shaft and which is screwed axially to the end of the pump shaft. The threaded ring is seated loosely on the pump shaft and by a thread which is provided in a front hub region of the pump impeller and into which the thread of the threaded ring is screwed.
    Type: Grant
    Filed: September 19, 2002
    Date of Patent: June 8, 2004
    Assignee: Grundfos A/S
    Inventors: Steffen Madsen, Peter Lindberg
  • Patent number: 6742987
    Abstract: A turbine nozzle includes a row of vanes in corresponding segmented outer and inner bands. The inner band of each segment includes a retention flange. A nozzle support includes forward and aft flanges defining a retention slot receiving the retention flange. The retention flange includes a radial lug trapped axially in the retention slot, and a tangential lug at an opposite circumferential end disposed on the forward flange. The aft flange includes an outer hinge, and the retention flange further includes an inner hinge for cradle mounting the retention flange in the nozzle support.
    Type: Grant
    Filed: July 16, 2002
    Date of Patent: June 1, 2004
    Assignee: General Electric Company
    Inventors: Victor Hugo Silva Correia, Robert Alan Jacobson
  • Patent number: 6742983
    Abstract: A compressor casing structure in the region of a rotor blade ring through which there is an axial flow, having a multiplicity of axial grooves which extend from a first radial plane upstream of the blade-tip inlet edges into a second radial plane between the blade-tip inlet edges and the blade-tip outlet edges and have groove cross sections with parallel side walls. The center axes of the groove cross sections have, at the upstream groove ends, from the opening to the groove base, an angle of inclination with a circumferential component counter to the direction of movement of the blade. The center axes of the groove cross sections have, at the downstream groove ends, an angle of inclination with a circumferential component in the direction of movement of the blade.
    Type: Grant
    Filed: July 17, 2002
    Date of Patent: June 1, 2004
    Assignee: MTU Aero Engines GmbH
    Inventor: Juergen Schmuecker
  • Patent number: 6739830
    Abstract: A gas turbine engine fan blade containment assembly (38) comprising a generally cylindrical, or frustoconical, metal casing (40) which has an inner surface (62), an outer surface (64), an upstream flange (42) and a downstream flange (52). The outer surface (62) of the metal casing (40) is provided with a pattern of blind apertures (66) which extend radially inwardly from the outer surface (62) of the metal casing (40) between the flanges (42,52). The fan blade containment has reduced weight of the metal casing (40) of the fan blade containment assembly (38) for a large diameter turbofan gas turbine engine (10) but has unimpaired stiffness and penetration resistance.
    Type: Grant
    Filed: October 29, 2002
    Date of Patent: May 25, 2004
    Assignee: Rolls-Royce plc
    Inventors: Sivasubramaniam K Sathianathan, Julian M Reed, Paul Hodgson, David Geary, Ian G Martindale
  • Patent number: 6739833
    Abstract: A compressor in which an electric motor and a compressing mechanism are accommodated in a case, a main shaft and an auxiliary shaft of a rotating shaft of the motor are supported by a radial plain bearing and a rolling bearing with a predetermined clearance given to the rotating shaft in an axial direction, a flange portion that contacts with a main-shaft receiving member of the radial plain bearing to align the rotating shaft with the compressing mechanism is provided on the main shaft, and preload toward the side of the rolling bearing is given to the rotating shaft. In this constitution, a prevention member for preventing contact and/or collision of the rotating shaft with the main-shaft receiving member is provided between opposing faces of the flange portion and the main-shaft receiving member.
    Type: Grant
    Filed: March 13, 2002
    Date of Patent: May 25, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Masahiko Makino, Yoshifumi Abe, Tatsuhisa Taguchi
  • Patent number: 6739836
    Abstract: An improved connection of blades (12) on a rotor disc (22) of a gas turbine, of the type in which a root (10) of each blade (12) is inserted in a seat (20) of the disc (22) which is complementary to the blade, wherein the root (10) is in the shape of an overturned isosceles triangle, with the two sides which converge at the base each having a grooved profile such as to form a series of teeth (14) and with a lower end (16) of the root (10) which is formed by the joined connection of the two lower teeth (14) of the two sides of the root (10), the teeth (14) of the root (10) corresponding to grooves (24) in the seat (20) and the lower end (16) of the root (10) corresponding to an end groove (26) in the seat (20).
    Type: Grant
    Filed: September 18, 2002
    Date of Patent: May 25, 2004
    Assignee: Nuovo Pignone Holding S.p.A.
    Inventors: Massimo Pinzauti, Giacomo Giovangrossi, Alessio Anichini
  • Patent number: 6733242
    Abstract: The present utility model relates to an improved mounting mechanism for ceiling fan outer casing. The ceiling fan outer casing is fixed on the support of the motor through mounting members, the mounting members comprising a pair of convex fixing members and a pair of concave fixing members corresponding to and matched in use with said convex fixing members, on each of said convex fixing members is provided a pair of protruding elements transversely spaced and arranged in parallel, the upper end of said two protruding elements is each provided at one outward side with a hook respectively, on each of said concave fixing members is provided a receiving groove which has one end opening and is inverted “Y” in shape receiving said convex fixing members, the two opposite sides of one end of said receiving groove are provided respectively with recessed portions matched with said hooks.
    Type: Grant
    Filed: November 22, 2002
    Date of Patent: May 11, 2004
    Assignee: Shell Electric Mfg. (Holdings) Co., Ltd.
    Inventor: Yau Yung
  • Patent number: 6733236
    Abstract: A compressor in a turbocharger has a compressor impeller in an inflow passage and an outflow region downstream of the compressor-impeller outlet edge. The outflow region is assigned a connecting passage, a stabilizing chamber and an outflow passage, the connecting passage being arranged with a lateral offset with respect to a longitudinal center axis of the stabilizing chamber.
    Type: Grant
    Filed: June 21, 2002
    Date of Patent: May 11, 2004
    Assignee: DaimlerChrysler AG
    Inventors: Siegfried Sumser, Peter Fledersbacher, Helmut Finger, Helmut Daudel, Gebhard Bopp
  • Patent number: 6733229
    Abstract: The invention comprises a metering plate which is assembled to an impingement insert for use in the nozzle of a gas turbine. The metering plate can have one or more metering holes and is used to balance the cooling flow within the nozzle. A metering plate with multiple holes reduces static pressure variations which result from the cooling airflow through the metering plate. The metering plate can be assembled to the insert before or after the insert is inserted into the nozzle.
    Type: Grant
    Filed: March 8, 2002
    Date of Patent: May 11, 2004
    Assignee: General Electric Company
    Inventors: Steven S. Burdgick, Gary Itzel, Sanjay Chopra, Nesim Abuaf, Victor H. Correia
  • Patent number: 6733241
    Abstract: Ceiling fan energy consumption efficiency is enhanced with fan blades that have an angle attack that decreases from root end to tip end at higher rates of decrease nearer their tip ends than at their root ends.
    Type: Grant
    Filed: July 11, 2002
    Date of Patent: May 11, 2004
    Assignee: Hunter Fan Company
    Inventor: Gregory Michael Bird
  • Patent number: 6726439
    Abstract: A wind or water flow energy converter comprising a wind or water flow actuated rotor assembly. The rotor comprises a plurality of blades, wherein the blades of are variable in length to provide a variable diameter rotor. The rotor diameter is controlled to fully extend the rotor at low flow velocity and to retract the rotor as flow velocity increases such that the loads delivered by or exerted upon the rotor do not exceed set limits.
    Type: Grant
    Filed: October 25, 2001
    Date of Patent: April 27, 2004
    Assignee: Clipper Windpower Technology, Inc.
    Inventors: Amir S. Mikhail, Geoffrey F. Deane
  • Patent number: 6726452
    Abstract: A turbine blade arrangement includes rotating blades respectively provided with a leg which can be respectively inserted into a groove on the outer circumference of a turbine disk in a radial, positive fit and which are respectively provided with a profiled section which has a lateral platform located in an end area on the side of the disk. At least one part of the platform is joined to the turbine disk by way of a retaining element which is independent from the leg of the blades in order to extend the profiled sections of the rotating blades.
    Type: Grant
    Filed: August 9, 2002
    Date of Patent: April 27, 2004
    Assignee: Siemens Aktiengesellschaft
    Inventors: Michael Strassberger, Peter Tiemann
  • Patent number: 6722853
    Abstract: The second stage nozzle has an airfoil profile substantially in accordance with Cartesian coordinate values of X, Y and Z set forth in Table I wherein X and Y values are in inches and define airfoil profile sections at each distance Z and Z is a non-dimensional value from 0 to 1 convertible to Z distances in inches by multiplying the Z values of Table I by a height of the airfoil in inches. The profile sections at the Z distances are joined smoothly with one another to form a complete airfoil shape. The X and Y distances may be scalable to provide a scaled-up or scaled-down airfoil for the nozzle. The nominal airfoil given by the X, Y and Z distances lies within an envelope of ±0.100 inches.
    Type: Grant
    Filed: November 22, 2002
    Date of Patent: April 20, 2004
    Assignee: General Electric Company
    Inventors: David John Humanchuk, Matthew Troy Hafner, James B. Fehlberg