Patents Examined by Donald S. Holland
  • Patent number: 4193738
    Abstract: An improved floating seal is provided to minimize leakage around the ends of a variable area turbine stator nozzle for use in cooperation with a circumscribing shroud. The seal is contoured to float within a pocket formed in the end of the nozzle vane which extends to the vane trailing edge. The forward end of the seal is forced into engagement with the shroud by the pressure of cooling air from within the vane. A seal surface attached to the trailing edge of the seal and projecting laterally of the vane utilizes the differential pressure across the vane airfoil surfaces to hold the trailing edge of the seal into engagement with the shroud. The improved floating seal reduces vane end leakage experienced by prior art floating seals.
    Type: Grant
    Filed: September 19, 1977
    Date of Patent: March 18, 1980
    Assignee: General Electric Company
    Inventors: Delmer H. Landis, Jr., Theodore T. Thomas, Jr., Charles J. Haap
  • Patent number: 4167368
    Abstract: Advance diffuser for an axial blower having an impeller of large diameter received in a substantially circular housing and an axis extending in a given direction, includes a suction box formed with an intake opening through which a medium is drawable by suction in a direction substantially perpendicular to the given direction of the blower axis, a plurality of swirl vanes mounted on respective, mutually parallel shafts in the suction box, the suction box having a pair of mutually opposing parallel walls wherein the shafts are rotatably mounted, a pair of casing surface sections mutually connecting the parallel walls and tangentially merging with and surrounding the substantially circular outline of the impeller housing, the suction box having another wall facing toward the impeller and formed with a suction opening, the parallel shafts whereon the swirl vanes are respectively mounted being disposed along an arc surrounding part of the suction opening, the arc having end points mutually connectible by a secant
    Type: Grant
    Filed: July 20, 1977
    Date of Patent: September 11, 1979
    Assignee: Aktiengesellschaft Kuhnle, Kopp & Kausch
    Inventor: Helmut Brobeck
  • Patent number: 4165949
    Abstract: In a turbine for a compressible fluid in which the fluid flow leaving the tepenultimate stage is separated into two coaxial flows, the inner flow passes through both the penultimate and the final stages of the turbine while the outer flow passes through the final stage only. This high efficiency arrangement for the last stages of a high power turbine exploits the advantages made available by using titanium as the blade material.
    Type: Grant
    Filed: August 4, 1977
    Date of Patent: August 28, 1979
    Assignee: Groupe Europeen pour la Technique des Turbines a Vapeur G.E.T.T.
    Inventor: Gilbert Riollet
  • Patent number: 4156581
    Abstract: A centrifugal compressor for a small-sized gas turbine utilized in an automobile. In a general gas turbine having a centrifugal compressor, a primary air flow along the front surface of a rotor disc is joined by a secondary air flow from a space between the rear surface of the rotor disc and a partition wall in an engine casing. The present invention provides improved positional relationships between the forward end of the outer periphery of a rotor disc and the rear wall of a diffuser, the outer periphery of the rotor disc and the tip of a rotor blade and the shape of the rear surface of the outer periphery of the rotor disc and the shape of the wall of a partition wall in an engine casing being opposed thereto, and a combination of those relationships to prevent the secondary air flow from changing the direction of the primary air flow.
    Type: Grant
    Filed: September 16, 1977
    Date of Patent: May 29, 1979
    Assignee: Toyota Jidosha Kogyo Kabushiki Kaisha
    Inventor: Shinichiro Higuchi
  • Patent number: 4155680
    Abstract: In a gas turbine engine including a compressor having a casing with a passage adapted to pass bleed air to a circumferentially extending bleed manifold surrounding the casing, the passage including a surface exposed to incendiary particles periodically entrained in the bleed air, an improvement is provided comprising means for preventing impingement of the particles upon the exposed surface. In one form the means is disposed between the exposed surface and the bleed air and is comprised of a material which, when reacted with the particles, produces a compound which is essentially nonpyrophoric in the environment of the passage.
    Type: Grant
    Filed: February 14, 1977
    Date of Patent: May 22, 1979
    Assignee: General Electric Company
    Inventors: Peter J. Linko, III, Michael A. Radomski, William E. Schoenborn
  • Patent number: 4155681
    Abstract: A protection system for use with a bleed manifold of a gas turbine engine is provided and is comprised of barrier means disposed within the manifold for preventing at least a portion of incendiary particles entrained in a fluid flowing instream through the manifold from impinging upon a wall associated with said manifold. Shielding means are also provided for shielding engine casing bleed ports from impingement by the particles.
    Type: Grant
    Filed: February 14, 1977
    Date of Patent: May 22, 1979
    Assignee: General Electric Company
    Inventors: Peter J. Linko, III, Michael A. Radomski, William E. Schoenborn
  • Patent number: 4152092
    Abstract: A rotary fluid handling device, such as a turbine or a compressor, comprising a stationary body and a rotor rotatably mounted therein. The rotor has a flowway therethrough having a radially extending end. An annular seal coaxially surrounds the rotor within the stationary body axially distal the radially extending flowway end. The device further comprises a bypass passageway system having an inlet communicating with the area between the rotor and the stationary body on the axially opposite side of the seal from the radially extending flowway end and an outlet communicating with the flowway. The inlet opens at least partially radially outwardly into the stationary body.
    Type: Grant
    Filed: March 18, 1977
    Date of Patent: May 1, 1979
    Inventor: Judson S. Swearingen
  • Patent number: 4152096
    Abstract: An impeller type pump has a pump body consisting of a front casing and a back casing. Each of the casings comprises a ceramic main portion and a protection member covering the main portion. The protection members of both the main portions are interconnected with each other at their confronting marginal portions through a continuous packing. Those confronting marginal portions of both the main portions which are adjacent to a pump chamber defined by inner surfaces of both the main portions are provided each with a plurality of concentrical rims loosely interdigitated to form a labyrinthine narrow passage restricting the flow of waste water therebetween, resulting in reduction of wear of the packing.
    Type: Grant
    Filed: October 27, 1977
    Date of Patent: May 1, 1979
    Assignees: Mitsui Mining & Smelting Co., Ltd., Mitsui Kinzoku Engineering Service Co., Ltd.
    Inventors: Yoshio Murakami, Takezo Nakazawa
  • Patent number: 4150918
    Abstract: A pressure gas engine in which pressurized gas such as air is supplied to a series of arcuately arranged nozzles for blasting the gas into a single series of closely adjacent impulse buckets in a rotor at its rim. Each bucket lies on a chord of the rim that is adjacent to a tangent to the rim that is parallel to this chord. Each bucket has an arcuate impulse surface of substantially constant radius transverse to the direction of rotation of the rotor and extending from an entrance side of the bucket that is adjacent to one end of the bucket to an opposite exhaust side adjacent to the opposite end of the bucket with each exhaust being subjected to minimum back pressure for maximum efficiency. There is also provided nozzle means comprising an arcuate series of nozzles in the casing around the rotor and closely adjacent to the rim for providing these gas blasts through the nozzles into the buckets for rotating the rotor.
    Type: Grant
    Filed: February 9, 1977
    Date of Patent: April 24, 1979
    Assignee: Hollymatic Corporation
    Inventor: James V. Theis, Jr.
  • Patent number: 4150917
    Abstract: Turbine structure having rotor cooling on the upstream side of the turbine's inlet or control stage with lower pressure turbine stages being situated axially downstream from the control stage. The normal axial direction of motive fluid flow is substantially the same through both the control stage and the lower pressure stages. Apertures in the control stage's rotatable disc portion of the rotor cause motive fluid which has been expanded through the control stage to be pumped into a cooling space formed between the rotor and a stationary nozzle structure which directs the motive fluid into the control stage. Motive fluid leakage between the nozzle structure and the control stage disc is minimized by a first set of seals disposed therebetween. Motive fluid leakage contact with the rotor is minimized by a second set of seals disposed between the control stage and nozzle structure with a conduit providing fluid communication for the leakage past the first seal to the exit from the control stage.
    Type: Grant
    Filed: June 14, 1977
    Date of Patent: April 24, 1979
    Assignee: Westinghouse Electric Corp.
    Inventor: George J. Silvestri, Jr.
  • Patent number: 4150915
    Abstract: The invention is concerned with an improvement in a movable vane assembly of the type used in a gas turbine engine or compressor for interaction with a gas stream comprising a plurality of radially aligned vanes, generally of an air foil configuration, circumferentially arranged within an annular passage formed by a housing, said vanes being supported for rotation about their radial axis to vary the effective cross-sectional area of said annular passage, a plurality of rotatable gear means connected for rotation with said aligned vanes and a ring gear having teeth means adapted for simultaneous engagement with the teeth means of said rotatable gear means such that rotation of said ring gear causes rotation of said vanes. In one sense the improvement comprises a support for the ring gear supportingly connected to the first housing inwardly radially and coaxial with the ring gear, the support comprising an annular ring having longitudinally extending slot means therein.
    Type: Grant
    Filed: December 23, 1976
    Date of Patent: April 24, 1979
    Assignee: Caterpillar Tractor Co.
    Inventor: Karl W. Karstensen
  • Patent number: 4149826
    Abstract: A gas turbine having a rotor and a stator, the stator defining a blade channel which is of generally conical configuration and being axially movable relative to the rotor. A thermal responsive means which is heated in accordance with the temperature of the gas in the turbine moves the stator and rotor axially relative to each other to vary the gap therebetween so as to maintain the clearance between the rotor blades and the stator housing within predetermined values. The gap is subject also to the rotational forces acting on the rotor blades.
    Type: Grant
    Filed: June 27, 1977
    Date of Patent: April 17, 1979
    Assignee: Stal-Labal Turbin AB
    Inventor: Nils A. R. Torstenfelt
  • Patent number: 4147468
    Abstract: An impeller type pump has a pump body defining a pump chamber therein, and an impeller disposed in the pump chamber having a center shaft. A hollow cylindrical connector is mounted in the center shaft having internal screw threads engageable with external screw threads on the end of a drive shaft for rotating the impeller. The connector is provided with thermal expansion-absorbing slits arranged in equally spaced relation along the circumference of the connector which extend lengthwise of the connector with an unslit portion left on that end of the connector which is close to the other end of the drive shaft.
    Type: Grant
    Filed: October 27, 1977
    Date of Patent: April 3, 1979
    Assignees: Mitsui Mining & Smelting Co., Ltd., Mitsui Kinzoku Engineering Service Co., Ltd.
    Inventors: Yoshio Murakami, Takezo Nakazawa
  • Patent number: 4143994
    Abstract: A turbine housing for a centrifugal turbosupercharger comprising a spiral wall defining a gas passage through which exhaust gas from an engine passes and a partition wall dividing said gas passage into two passages wherein the height of the partition wall gradually decreases in the downstream direction. In such a manner that the gap between the outer periphery of a turbine rotor and the tip of the partition wall reaches a maximum at about 225.degree. as measured from an intersection of the inner periphery of the partition wall and a line passing through the center of the turbine rotor and drawn perpendicular to the direction of introduction of exhaust gas.
    Type: Grant
    Filed: May 2, 1977
    Date of Patent: March 13, 1979
    Assignee: Kabushiki Kaisha Komatsu Seisakusho
    Inventor: Hiromasa Yamaguchi
  • Patent number: 4143993
    Abstract: A sewage pump immersible in a conveyed medium and including an electric motor and a pump member connected therewith with there being also a suction opening. The sewage pump has comminuting devices arranged no further downstream than in the region of the suction opening for comminuting sucked-in admixtures. A principal feature of the sewage pump is that elements selectively of the retaining and repelling type are provided in combination with the comminuting devices for acting on the suction of the pump member to counteract the suction flow.
    Type: Grant
    Filed: December 2, 1976
    Date of Patent: March 13, 1979
    Inventor: Albert Blum
  • Patent number: 4142827
    Abstract: A locking system for locking in position the blades in the stator case of an axial compressor, wherein all of the blades are subjected exactly to the same locking load and can rapidly be assembled and disassembled when necessary. The system is especially suited for axial compressors which are required to operate in a dusty environment.
    Type: Grant
    Filed: June 1, 1977
    Date of Patent: March 6, 1979
    Assignee: Nuovo Pignone S.p.A.
    Inventor: Constantino Vinciguerra
  • Patent number: 4141506
    Abstract: A variable flow diffuser for use in air cushion vehicles to convert the ktic energy of the moving air from the main fan into potential energy of air pressure. The conversion is accomplished by passing the air flow from the fan through a flow splitter and diverting it radially outward in all directions along a plane perpendicular to the initial direction of the air flow. The volume of air passing through the diffuser is controlled by placing control vanes around the flow splitter or by moving the flow splitter and a back plate in and out of the air channel.
    Type: Grant
    Filed: July 15, 1977
    Date of Patent: February 27, 1979
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Jerry W. Cuthbert, Sydney Davis
  • Patent number: 4139329
    Abstract: This invention relates to a device which is capable of accurately transferring a rotating movement from a master control to a pivotal vane tip in a gas turbine engine. A series of stationary vanes which are housed inside the casing of a gas turbine are each provided with a trailing rotatable vane tip. The device to which this application is directed is mounted on the casing of the gas turbine in a sealed manner and is connected to the rotatable vane tip. The vane tip is continuously biased in a radially outward direction by the motion transfer device to assure the best possible seal of the vane tip in the turbine. Provision is made to allow the vane tip to have some radial flexibility to prevent binding of the vane tip under thermal cycling stresses.
    Type: Grant
    Filed: May 16, 1977
    Date of Patent: February 13, 1979
    Assignee: Westinghouse Canada Limited
    Inventor: John Korta
  • Patent number: 4137006
    Abstract: A composite horizontally split casing includes an inlet end having upper and lower cast inlet end sections, an outlet end having upper and lower cast outlet end sections, and separable upper and lower semi-cylindrical shell sections extending axially between the inlet and outlet ends. The upper semi-cylindrical shell section is welded at opposite ends respectively to the upper inlet and outlet end sections to form an upper casing half. The lower semi-cylindrical shell section is likewise welded at opposite ends respectively to the lower inlet and outlet end sections to form a lower casing half. External bolting flanges on the upper and lower casing halves provide the means by which the upper casing half is mounted on the lower casing half.
    Type: Grant
    Filed: January 26, 1977
    Date of Patent: January 30, 1979
    Assignee: K B Southern, Inc.
    Inventor: John H. Becker
  • Patent number: 4135851
    Abstract: A gas path seal suitable for use with a turbine engine or compressor is provided. A shroud wearable or abradable by the abrasion of the rotor blades of the turbine or compressor shrouds the rotor blades. A compliant backing surrounds the shroud. The backing may be made of corrugated sheets or the like with adjacent layers having off-set corrugations, with axes of the folds parallel to the rotor axis. The sheets may be bonded together at points of contact by brazing, welding or the like. In another embodiment a compliant material is covered with a thin ductile layer. A mounting fixture surrounds the backing.
    Type: Grant
    Filed: May 27, 1977
    Date of Patent: January 23, 1979
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: Robert C. Bill, Lawrence P. Ludwig