Patents Represented by Attorney Edward L. Kochey, Jr.
  • Patent number: 5409349
    Abstract: Isogrid structure (20) forms case (14) surrounding the fan blades (12) of the turbofan. A ballistic fabric (22) surrounds the case. Containment zones (30, 32, 34) at the forward end have isogrid ribs (38) extending other than circumferentially. In the rear support zone ribs (76) extend circumferentially stiffening the case against collapse.
    Type: Grant
    Filed: April 29, 1994
    Date of Patent: April 25, 1995
    Assignee: United Technologies Corporation
    Inventors: Andrew C. Kulak, Richard T. White
  • Patent number: 5407133
    Abstract: A first metal sheet (34) has openings (46) in registration with depressions (40) in a second contacting metal sheet (36). Each depression has a downstream wall (42) at an angle of 24.degree. from the plane of the sheets. A metering hole (56) in the depression amidst cooling air in a direction to first impinge against an overlaying portion (48) of the first plate, before it diffuses along the downstream wall.
    Type: Grant
    Filed: December 26, 1989
    Date of Patent: April 18, 1995
    Assignee: United Technologies Corporation
    Inventor: George P. Liang
  • Patent number: 5403071
    Abstract: Wire is wound from spool 10 onto drum 15 where a multiple strand rope is formed and gripped at multiple locations. The gripped rope is cut into individual bundles, one end of each bundle being bonded to join the wires of the bundle together. The tufts may then be used to form a brush seal.
    Type: Grant
    Filed: November 24, 1993
    Date of Patent: April 4, 1995
    Assignee: United Technologies Corporation
    Inventors: Jeffrey D. Hostetler, Lawrence E. Noone, Leo J. Lagasse
  • Patent number: 5402632
    Abstract: The double derivative of the gas generator shaft (16) is sensed and compared to upper and lower limits to determine breaches of these limits within a first predetermined time, in which case a first potential surge condition is declared. The derivative of torque, or the double derivative of shaft speed, of the power shaft (22) is sensed and compared to upper and lower limits to determine breaches of these limits within a second predetermined time, in which case a second potential surge condition is declared. If both a first and second potential surge condition is declared within a third predetermined time, an actual surge condition is declared.
    Type: Grant
    Filed: February 22, 1994
    Date of Patent: April 4, 1995
    Assignee: Pratt & Whitney Canada, Inc.
    Inventors: Anthony Nobre, Daniel Gratton
  • Patent number: 5402633
    Abstract: A premix gas nozzle has longitudinal tangential entrance slots to a cylindrical chamber. There is an axially increasing flow area toward the chamber outlet, with pilot fuel centrally introduced near the outlet. A lean mix low NOx fuel nozzle is thereby stabilized.
    Type: Grant
    Filed: October 6, 1993
    Date of Patent: April 4, 1995
    Assignee: United Technologies Corporation
    Inventor: Aaron S. Hu
  • Patent number: 5396793
    Abstract: The test cell has a pressure recovery pipe (26) receiving air from the tested engine (14). Excess air is inherently induced into the pipe. A source flow path for this excess air is provided from within the pipe (36) back to the entrance the pipe passing through a perforated bulkhead (30). High local velocities of the recirculating air, resulting variable static pressures on the engine and uncertainty in the thrust measurement are avoided.
    Type: Grant
    Filed: September 17, 1993
    Date of Patent: March 14, 1995
    Assignee: United Technologies Corporation
    Inventor: William D. Colletti
  • Patent number: 5387081
    Abstract: Compressor 14 of a gas turbine engine has a final centrifugal stage 18 discharging air into annulus 20. Diffuser 20 are straight and of frustoconical shape receiving air from the annulus. A side cut produces opening 38 in the side of each diffuser. Much of the flow exits through, and is directed by these openings.
    Type: Grant
    Filed: December 9, 1993
    Date of Patent: February 7, 1995
    Assignee: Pratt & Whitney Canada, Inc.
    Inventor: Andre D. LeBlanc
  • Patent number: 5380155
    Abstract: Stator vanes (22) are potted within pockets (38) in composite inner shroud sections (36). The pocket depth is only that required for bond strength and vane damping. Ribs (48) extend inwardly and are adhesively bonded to the seal support ring (32,34) which carries abradable seal surface.
    Type: Grant
    Filed: March 1, 1994
    Date of Patent: January 10, 1995
    Assignee: United Technologies Corporation
    Inventors: David A. Varsik, Jeffrey S. LeShane, Brian Selfors
  • Patent number: 5378108
    Abstract: Turbine blade (10) has a plurality of trailing edge discharge openings (28) discharging cooling air. The blade trailing edge has an increasing thickness "E" toward the tip end (16). Discharge openings with the shortened pressure wall "L" have lesser distances "L" toward the tip end.
    Type: Grant
    Filed: March 25, 1994
    Date of Patent: January 3, 1995
    Assignee: United Technologies Corporation
    Inventor: Mark F. Zelesky
  • Patent number: 5370312
    Abstract: The spherical portions of two gimbal (18) mounted convergent flaps (26,28) have hub structures (24) of concentric hubs (54,56). A piston (38) within each hub carries an annular seal (36) which is urged into sealing contact with the spherical static structure (10).The hub communicates air to a plenum between the convergent flaps to cool the convergent flaps.
    Type: Grant
    Filed: July 13, 1993
    Date of Patent: December 6, 1994
    Assignee: United Technologies Corporation
    Inventor: Mathew S. Kight
  • Patent number: 5364029
    Abstract: The gas turbine engine nozzle has fifteen divergent flaps (18) secured to fifteen convergent flaps (14). Five external flaps (30), are each of a "V" shape, and surround the divergent flaps. The position of all flaps is adjustable (22) for varying the nozzle configuration. Arms (46,48) of the external flaps overlap, being parallel at the maximum overlap. The external flaps are slidably secured to the divergent flaps and move therewith.
    Type: Grant
    Filed: August 30, 1993
    Date of Patent: November 15, 1994
    Assignee: United Technologies Corporation
    Inventor: M. Kevin Barcza
  • Patent number: 5352091
    Abstract: Tube 16 within airfoil 10 carries cooling air. Flow openings 28 in the tubes direct cooling air 29 against the airfoil inner surface 14. Protrusions 30 form extended surface in the form of segmented trip strips are located with segmented trip strips are located with at least same in registration with openings 28. The chamber 18 between the tube 16 and surface 14 has an increasing flow area toward air exit 20.
    Type: Grant
    Filed: January 5, 1994
    Date of Patent: October 4, 1994
    Assignee: United Technologies Corporation
    Inventor: Joseph A. Sylvestro
  • Patent number: 5350136
    Abstract: An inner cowl 30 is attached to outer cowling 26. When it is opened it rotates around hinge line extension 36. Latch band 38 has an arcuate upper link 44 secured to anchor 40. A lower link 50 circumferentially slides around the cowl on opening. The latch 52 which secures the lower link is located in a lower gradient where it is visible and accessible.
    Type: Grant
    Filed: May 14, 1993
    Date of Patent: September 27, 1994
    Assignee: United Technologies Corporation
    Inventors: Harold T. Prosser, Joseph L. Forsyth, Lewis J. Frost
  • Patent number: 5337452
    Abstract: Panels (10, 12, 16, 20) are joined on several hinge axes (14-22, 18-24), and may fold around either axis. A spherical ball (26) fits within a ball receiving socket (28) in the corner of each panel. Sealing against leakage, from one side of the panels to the other, is accomplished at this multiple axis point.
    Type: Grant
    Filed: June 11, 1993
    Date of Patent: August 16, 1994
    Assignee: United Technologies Corporation
    Inventors: George LeBlanc, Gwyn Gallagher
  • Patent number: 5335489
    Abstract: An exhaust nozzle has variable convergent flaps, ejector flaps, and short divergent flaps spaced inwardly from the ejector flaps, cooling air is introduced through the opening between the divergent and ejector flaps. When the nozzle is vectored, the size of the opening is increased in the region of the nozzle experiencing higher static pressure.
    Type: Grant
    Filed: July 9, 1993
    Date of Patent: August 9, 1994
    Assignee: United Technologies Corporation
    Inventor: Edward B. Thayer
  • Patent number: 5328098
    Abstract: The external flaps (32), which contain the ram air, continue to form a conical structure during vectoring. External flaps (32) are hinged to the unison ring (30) with ejector flaps (34) hinged to the external flaps. A scissors linkage ( 48 ) joins each ejector flap (34) to the adjacent external flops. A spaced slider connection (58) guides, from the ejector flaps (34), the divergent flaps (26) which are joined to the convergent flaps (20) with a universal joint (28).
    Type: Grant
    Filed: July 9, 1993
    Date of Patent: July 12, 1994
    Assignee: United Technologies Corporation
    Inventors: W. Kevin Barcza, Larry E. Anders
  • Patent number: 5313786
    Abstract: An integrated damper and windage cover 52 has a windage cover portion 56 cantilevered at the upstream end, free of contact with the blade platform 24, 32. The contact portion 54 is rigid and bears against the underside of the blade platform 24, spanning blade platform clearance 50.
    Type: Grant
    Filed: November 24, 1992
    Date of Patent: May 24, 1994
    Assignee: United Technologies Corporation
    Inventors: Wieslaw A. Chlus, Michael Gonsor, David P. Houston, Paul D. Kudra
  • Patent number: 5313038
    Abstract: Low angle air directing slots in the tip of an airfoil are produced by forming an elongated electrode by forming notches on opposite sides of the electrode and performing electric discharge machine with the electrode. During machining the electrode is oriented and fed at an acute angle with respect to the surface of the airfoil tip to form an opening, and then rotating the electrode to a position increasingly perpendicular to the surface of the airfoil tip.
    Type: Grant
    Filed: December 22, 1992
    Date of Patent: May 17, 1994
    Assignee: United Technologies Corporation
    Inventor: Robert J. Kildea
  • Patent number: 5307634
    Abstract: A premix gas nozzle has longitudinal tangential entrance slots to a cylindrical chamber. There is an axially increasing flow area toward the chamber outlet, with pilot fuel centrally introduced near the outlet. A lean mix low NOx fuel nozzle is thereby stabilized.
    Type: Grant
    Filed: February 26, 1992
    Date of Patent: May 3, 1994
    Assignee: United Technologies Corporation
    Inventor: Aaron S. Hu
  • Patent number: 5305609
    Abstract: A fuel injector 14 passes through wall 10 to inject fuel into a hot supersonic air flow 12. Wedge seals 26, 28 seal against leakage in cooperation with injection air flow 37, being compressed within seal carrier 16. Face seals 30, 32 are compressed by cover plate 34. Inboard seals 26, 44 are preferably more porous than the outboard seals so that there is a leakage of cooling air through crevice 44.
    Type: Grant
    Filed: May 14, 1993
    Date of Patent: April 26, 1994
    Assignee: United Technologies Corporation
    Inventors: Daniel P. Guinan, Donald R. Miehe