Patents Represented by Attorney Edward L. Kochey, Jr.

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  • Vaneless contrarotating turbine
    Patent number: 5077968
    Abstract: First turbine stage 14 rotates at low speed, doing moderate work, and driving a low pressure pump (22). Second turbine stage 16 rotates at high speed, doing a major portion of the work, and drives a high pressure pump (28). The low speed pump is compatible with suction requirements, and the second turbine stage does the substantial work at high efficiency.
    Type: Grant
    Filed: April 6, 1990
    Date of Patent: January 7, 1992
    Assignee: United Technologies Corporation
    Inventor: Bruce R. Branstrom
  • Cooled liner for hot gas conduit
    Patent number: 5077969
    Abstract: A plurality of gas diffusion openings (24) direct film cooling air (26) along the surface of sheet (20). Each opening (24) includes a baffle (28) extending into gas stream (10) defining gas chamber (30) with outlet opening (32). Cool air inlet opening (34) meters and directs impingement air against the upstream end (36) of the baffle. cooling air discharge is parallel to the surface to be cooled and the baffle directs the upstream hot air flow.
    Type: Grant
    Filed: April 6, 1990
    Date of Patent: January 7, 1992
    Assignee: United Technologies Corporation
    Inventors: George P. Liang, Curtis C. Cowan
  • Electrical terminal block assembly
    Patent number: 5076795
    Abstract: A support block has slots in the top and rear faces receiving bent terminal strips. Protrusions on the strips abut a forward or downwardly facing surface at the front of the top slot. Protrusions at the other end of the strips abut a downwardly facing surface at the bottom of the rear slot. A terminal tip extends forwardly, and a tang for soldering into a circuit board extends downwardly. Terminal strips without protrusions fit within slots in the bottom face of the support block.
    Type: Grant
    Filed: December 24, 1990
    Date of Patent: December 31, 1991
    Assignee: United Technologies Automotive, Inc.
    Inventors: Eric Krupp, Dave Tinder
  • System for operating gas turbine jet engine with fan damage
    Patent number: 5072580
    Abstract: Normal high load operation automatically varies nozzle area to maintain an optimum engine pressure ratio (EPR). An error signal representing fan damage is established by comparing the actual EPR to the predicted EPR. Compressor stalls are also monitored. In response to these signals a minimum nozzle area is set and modified. Automatic operation to hold EPR and afterburning is inhibited. Further signals representing satisfactory operation may reset the inhibiting action.
    Type: Grant
    Filed: July 17, 1990
    Date of Patent: December 17, 1991
    Assignee: United Technologies Corporation
    Inventors: Gregory S. Patterson, James B. Kelly
  • Engine nozzle liner retainer
    Patent number: 5067324
    Abstract: A nozzle liner (14) is secured to a nozzle support structure (10) with interlocking clips (24, 26). After moving the liner axially into engagement cantilever spring (32) abuts a clip (24) which retains the liner. The liner is easily installed, spring engagement may be confirmed, and the liner is readily removable.
    Type: Grant
    Filed: April 4, 1990
    Date of Patent: November 26, 1991
    Assignee: United Technologies Corporation
    Inventors: Deane Beytes, Erik A. Lindstrom
  • Three position actuator arrangement
    Patent number: 5067323
    Abstract: Actuator (14) drives inlet vanes (22) selectively to three positions, using high (58) and low (56) pressure fuel as the driving medium. Each of the three position is externally adjustable (94, 92, 68). An overboard leak path (86) is provided at the most often sliding seal.
    Type: Grant
    Filed: June 13, 1990
    Date of Patent: November 26, 1991
    Assignee: United Technologies Corporation
    Inventors: Keith N. Bennett, Richard H. Pangretic, Jr.
  • Method of forming a hollow blade
    Patent number: 5063662
    Abstract: An untwisted hollow blade with internal reinforcing ribs is formed by diffusion bonding two halves. A predominate portion of the blade twist is accomplished by gravity creep deforming against a supporting die, aided by applying twisting moments at the ends. The blade is free to move axially at one end. Simultaneous heat soak for solution heat treatment minimizes overall grain growth. Later, hot forming between heated dies is supplemented with internal blade pressure after die closing. Metal flow is more easily predictable whereby finite element analysis may establish the proper starting form.
    Type: Grant
    Filed: January 15, 1991
    Date of Patent: November 12, 1991
    Assignee: United Technologies Corporation
    Inventors: David Porter, James R. Dillner, Peter E. Leibfried, William R. Reimels, J. George Asfalg
  • Fuel cell power plant
    Patent number: 5059494
    Abstract: Pressure differential 6 between cathode 2 and anode 3 is controlled by valve 24, 26 of valve complex 20. The complex 20 is located within anode recirculation loop 8, 9, 3, 20 whereby controllability is not lost with no flow through the anode. Control is thereby retained during nitrogen purging of the cathode.An orifice 22 in the valve complex 20 precludes accidental full closure of the complex, and is selected to avoid immediate damage to the fuel cell on such closure.
    Type: Grant
    Filed: May 10, 1990
    Date of Patent: October 22, 1991
    Assignee: International Fuel Cells
    Inventors: George Vartanian, Michael B. Landau
  • Compressor bleed port
    Patent number: 5059093
    Abstract: Rectangular bleed ports (24) are circumferentially arranged. Each port has an average radius (r) greater than 30 percent of the port width (W) throughout the reactant surface of the upstream facing edge (30), thereby avoiding flow separation from the surface. A tangent point (36) at the junction of the reactant surface (36) and the inside surface of casing (12) is located a distance (x) upstream to blades (18) greater than 40 percent of the spacing between the blades. This reduces flow losses in the ports caused by blade upwash.
    Type: Grant
    Filed: June 7, 1990
    Date of Patent: October 22, 1991
    Assignee: United Technologies Corporation
    Inventors: Syed J. Khalid, Brian A. Robideau
  • Rotor blade bonding device
    Patent number: 5048743
    Abstract: A blade bonding device permits individual blades to be bonded to a blade stub for the purpose of replacing a damaged blade. The device includes a clamp frame and hydraulic ram. A blade holder arranged in contact with the axially moveable ram shaft is guided by a precision slot and pin arrangement from the frame. The clamp engages the inner surfaces of the rim of the rotor disk, and has a cooling passage through this location near the rim. The advantages of the clamp and cooling means are to not mechanically or thermally stress the disk.
    Type: Grant
    Filed: April 26, 1990
    Date of Patent: September 17, 1991
    Assignee: United Technologies Corporation
    Inventors: Raymond M. Walker, John T. Sinski
  • Fuel Preheating for a fuel processing system of a fuel cell power plant
    Patent number: 5043232
    Abstract: Heat exchanger 4 operates in counterflow relationship to cool reformed gas and to heat raw gas during operation with gaseous raw fuel feed. It also operates in counterflow relationship when preheating the system while recirculating inert gas. This same heat exchanger 4 operates in parallel flow relationship when liquid raw fuel is to be vaporized. Only one heat exchanger is required while avoiding cracking and fouling in the heat exchanger.
    Type: Grant
    Filed: May 10, 1990
    Date of Patent: August 27, 1991
    Assignee: International Fuel Cells Corporation
    Inventors: Michael B. Landau, Yasar B. Tanrikut
  • Deformable mirror actuator attachment
    Patent number: 5037184
    Abstract: Oppositely polarized magnets are secured to a deformable mirror and a corresponding actuator. They rely on magnetic attraction to maintain the connection between the actuator and mirror. A reverse magnetic field is imposed when the actuator is to be removed for repair.
    Type: Grant
    Filed: December 18, 1989
    Date of Patent: August 6, 1991
    Assignee: United Technologies Corporation
    Inventor: Mark A. Ealey
  • Laser drilling
    Patent number: 5037183
    Abstract: A plurality of holes are drilled with a repetitively pulsed laser. The time between pulses at one drilling location is utilized to drill the other holes. A rotatable mirror controllably directs the beam to the focusing lens. The distance between the mirror and the lens determines whether the drilled holes are parallel or divergent.
    Type: Grant
    Filed: February 22, 1989
    Date of Patent: August 6, 1991
    Assignee: United Technologies Corporation
    Inventors: Ronald Gagosz, Richard W. Frye
  • Compressor blade attachment assembly
    Patent number: 5022822
    Abstract: Compressor disk (10) has a plurality of rim portions (16, 20, 24) of increasing diameter. Parallel blade retention grooves (30, 32, 34) at locations commensurate with their respective rim portion diameters receive blade tongues (46, 48, 50). Dead load is decreased resulting in a smaller, lighter weight compressor.
    Type: Grant
    Filed: October 24, 1989
    Date of Patent: June 11, 1991
    Assignee: United Technologies Corporation
    Inventor: Steven M. Sincere
  • Power plant cogeneration control
    Patent number: 5023151
    Abstract: Fuel cell coolant loop (2) is to be controlled to maintain set point 38 temperature of the return coolant. Waste heat heat exchanger 10 is controlled to maintain set point 22 temperature in the waste heat fluid. Heat rejection heat exchanger removes additional heat as required to maintain the set point (38) temperature.If both set point temperatures cannot be maintained, a control override allows the waste heat fluid temperature to drop.
    Type: Grant
    Filed: October 1, 1990
    Date of Patent: June 11, 1991
    Assignee: International Fuel Cells Corporation
    Inventors: Michael B. Landau, George Vartanian, Kazuyuki Matsuzawa
  • Gas turbine blade shroud support
    Patent number: 5022816
    Abstract: Tip shroud segments (26) are supported in support ring (24). The ring has at its downstream end conical surface (32) mating and in interference fit with conical surface (16). When flange (20) is torqued, face (22) aligns and forces support ring (24) into the interference fit. Concentricity and rigidity of the shroud support is obtained in a structure easily assembled and disassembled.
    Type: Grant
    Filed: October 24, 1989
    Date of Patent: June 11, 1991
    Assignee: United Technologies Corporation
    Inventors: Mark S. Maier, Jack W. Wilson, Jr.
  • Multiple function fuel valve and system
    Patent number: 5020315
    Abstract: A floating piston (54) has a valved (86) vent opening (88), with the vent opening closing (92) on movement of the piston. The piston is spring loaded (56, 58) to vent air, but seal fuel. Modulation of pressure in pressure resisting chamber (48) between pump discharge and lower pressures, provides control of the valve. Pressure difference (96, 62) and valve position (36) measurements provide flow measurement data.
    Type: Grant
    Filed: August 8, 1989
    Date of Patent: June 4, 1991
    Assignee: United Technologies Corporation
    Inventors: Frank A. Leachman, Jr., Edward F. Cole
  • Combustor liner construction for gas turbine engine
    Patent number: 5012645
    Abstract: Floating panel heat shields 26 cover the walls of a combustor with a portion of the cooling air 32 passing upstream. The dome heat shield 36 has a lip 42 overlapping a portion of the wall hot shield 26. Dome 16 at location 44 deflects cooling flow 32 forcing it inwardly against lip 42 to improve cooling of lip 42.
    Type: Grant
    Filed: August 3, 1987
    Date of Patent: May 7, 1991
    Assignee: United Technologies Corporation
    Inventor: Harold G. Reynolds
  • Convergent/divergent nozzle construction
    Patent number: 5011080
    Abstract: Misalignment tolerances in a nozzle four bar linkage (14, 18, 24, 26) are minimized by direct pinning (42) the A-frame 14 and the mode strut bracket (32). The A-frame and bracket are independently bolted to support 12. Tolerance stackup preventing installation or increasing wear is avoided.
    Type: Grant
    Filed: April 18, 1990
    Date of Patent: April 30, 1991
    Assignee: United Technologies Corporation
    Inventors: William K. Barcza, Curtis W. Berger, Luke A. Hmiel
  • Fuel cell end plate structure
    Patent number: 5009968
    Abstract: The end plates (16) of a fuel cell stack (12) are formed of a thin membrane. Pressure plates (20) exert compressive load through insulation layers (22, 26) to the membrane. Electrical contact between the end plates (16) and electrodes (50, 58) is maintained without deleterious making and breaking of electrical contacts during thermal transients. The thin end plate (16) under compressive load will not distort with a temperature difference across its thickness. Pressure plate (20) experiences a low thermal transient because it is insulated from the cell. The impact on the end plate of any slight deflection created in the pressure plate by temperature difference is minimized by the resilient pressure pad, in the form of insulation, therebetween.
    Type: Grant
    Filed: September 8, 1989
    Date of Patent: April 23, 1991
    Assignee: International Fuel Cells Corporation
    Inventors: Robin J. Guthrie, Murray Katz, Craig R. Schroll