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| Number | Title | Issue Date |
| 8125747 | Method for mitigating negative sequence effect resulting from non-symmetrical short circuit failure of synchronous electric machine based systems A drive system for a multi-phase electric machine with a permanent magnet rotor, the drive system may comprise conduction paths for each phase. Detectors on each of the conduction paths may determine electrical condition of the conduction path. At least one selectab... | 02/28/2012 |
| 8114198 | Cross ship architecture for dispatch critical fuel tank inerting system A fuel tank inerting system uses two “half systems” for providing inerting gas for the fuel tanks. Each inerting system may be composed of a temperature control and air pressurization unit (TCPU) and an air separation unit (ASU). A cross-ship duct and valve allo... | 02/14/2012 |
| 8080966 | Motor control architecture for simultaneously controlling multiple motors A motor control architecture is provided that simultaneously controls multiple motors. The motor control system includes memory, a plurality of motor control processors, and a communication controller. The motor control processors are each responsive to control sign... | 12/20/2011 |
| 8079407 | Integrated heat exchangers for ECS and OBIGGS applications An integrated heat exchanger comprises a primary heat transfer zone and a secondary heat transfer zone integral to the primary heat transfer zone. The primary heat transfer zone comprises an ECS heat exchanger and the secondary heat transfer zone comprises a heat ex... | 12/20/2011 |
| 8050543 | Trigger mechanism for current acquisition used for motor control applications A trigger mechanism for starting current acquisition for motor control applications is disclosed. The present invention may generate an edge (ADC trigger) that can be used to start current acquisition by the ADC. The present invention may reduce the overhead involve... | 11/01/2011 |
| 8042571 | Rigid mount anti-leak fluid coupler A fluid coupler for connecting two hydraulic appliances together without requiring flexible hoses is described. The fluid coupler enables fluid-tight connecting between fixed position components and allows for separating the hydraulic appliances without decoupling t... | 10/25/2011 |
| 8021290 | Oil centrifuge for extracting particulates from a fluid using centrifugal force A centrifuge is employed to continuously remove particulates from a fluid. In one embodiment, the centrifuge removes small particles of soot from lubricating oil of diesel engines. The fluid is introduced into the centrifuge through a distribution rotor so that vort... | 09/20/2011 |
| 8016232 | Aircraft cabin pressure descent detection and control system and method Methods and apparatus are provided controlling aircraft cabin pressure, and more specifically engine bleed air manifold pressure, during aircraft descent. An aircraft engine bleed air manifold control pressure setpoint is to either a descent pressure setpoint or a c... | 09/13/2011 |
| 8016124 | Thin film gas separation membranes A gas separation membrane comprises a blend of polyethersulfone (PES) and aromatic polyimide polymers that may comprise a plurality of first repeating units of formula (I), wherein X1, X 2 and X3 ... | 09/13/2011 |
| 7988426 | Compressor ported shroud for foil bearing cooling A compressor ported shroud takes compressed air from the shroud of the compressor before it is completely compressed and delivers it to foil bearings. The compressed air has a lower pressure and temperature than compressed outlet air. The lower temperature of the ai... | 08/02/2011 |
| 7980293 | Two fluid thermal storage device to allow for independent heating and cooling A two fluid thermal storage device that may allow for independent heating and cooling includes a plurality of plate members with a set of dividers brazed between two of them. The set of dividers, which may define a series of passageways therein, may include a first ... | 07/19/2011 |
| 7959546 | Oil centrifuge for extracting particulates from a continuous flow of fluid A centrifuge is employed to continuously remove particulates from a fluid. In one embodiment, the centrifuge removes small particles of soot from lubricating oil of large diesel engines. The fluid in introduced into the centrifuge through an inducer so that vortexes... | 06/14/2011 |
| 7954998 | Thrust bearing A hydrodynamic bearing set, for use with a thrust disk disposed between planar surfaces of a housing, includes first and second topfoils disposed adjacent first and second thrust disk axial bearing surfaces and removably secured to the housing. An underspring is sec... | 06/07/2011 |
| 7950987 | Aircraft cabin pressure control system and method that improves cabin pressurization during take-off A cabin pressure control system and method improves cabin pressurization during aircraft take-off operations. The cabin pressure control system sets a cabin pressurization rate limit based on a cabin pressurization rate error. The cabin pressurization rate error is ... | 05/31/2011 |
| 7950149 | Microchannel heat exchanger fabricated by wire electro-discharge machining The present invention provides panels for a microchannel heat exchanger core wherein the panels may have greater than about 36 fins per inch of the panel. The microchannels of the panels may have an aspect ratio of at least about 10. Panels are also provided having ... | 05/31/2011 |
| 7007475 | Conical helical of spiral combustor scroll device in gas turbine engine A conical helical design for a turbine combustor scroll utilizes as much cavity of the combustor housing as possible by adding an axial shift and an irregular cross sectional shape in the scroll without adversely effecting aerodynamic performance. The axial shift re... | 03/07/2006 |
| 7007480 | Multi-axial pivoting combustor liner in gas turbine engine A multi-axial pivoting liner within the combustion system of a turbine engine allows the system to work with minimum thermal interference, especially during system operation at transient conditions, by allowing the liner to pivot and slide about its centerline and r... | 03/07/2006 |
| 6971241 | Dual mode power unit having a combustor bypass system A gas turbine engine integrates the functions of an auxiliary power unit (APU) with one or more functions of an ECS, and that is capable of operating in both an unfired mode and a fired mode. The gas turbine engine includes a combustor system that is configured to a... | 12/06/2005 |
| 6968697 | Integral compressor housing of gas turbine engines A turbine engine compressor design utilizing multiple component integration, thereby reducing the number of required engine components. In conventional compressor designs, a multiple component system makes it difficult to predict the structural behaviors due to ther... | 11/29/2005 |
| 6969431 | High temperature powder metallurgy superalloy with enhanced fatigue and creep resistance A nickel based superalloy composition comprising 16.0 to 20.0 weight % Co, 9.5 to 11.5 weight % Cr, 1.8 to 3.0 weight % Mo, 4.3 to 6.0 weight % W, 3.0 to 4.2 weight % Al, 3.0 to 4.4 weight % Ti, 1.0 to 2.0 weight % Ta, 0.5 to 1.5 weight % Nb, 0.01 to 0.05 weight % C... | 11/29/2005 |
| 6969240 | Integral turbine composed of a cast single crystal blade ring diffusion bonded to a high strength disk A lightweight high temperature bladed turbine disk intended for use in gas turbine engines. The bladed disk comprises a cast integral ring of single crystal airfoils with the primary and secondary crystallographic orientation being the same for each airfoil. Low-ang... | 11/29/2005 |
| 6942445 | Gas turbine cooled shroud assembly with hot gas ingestion suppression A cooled shroud assembly includes an angled slot and a plurality of dilution jet openings. The shroud forward cavity is modified such that at least one recirculation zone is produced. The angled slot forces an axial change in momentum of the hot gas flow and increas... | 09/13/2005 |
| 6935006 | Spun metal form used to manufacture dual alloy turbine wheel A spun metal form used to manufacture a dual alloy turbine wheel. The spun metal form prevents braze alloy contamination of the hub/casting interface by relocating the braze joint away from the interface. The spun metal form allows for the re-working of components a... | 08/30/2005 |
| 6931835 | Multivariant set point using N1 and N2 for engine control A method for selecting a setpoint for a turbofan engine having a fan speed and a core idle speed scheduling includes determining a weighting factor based upon a throttle lever position, the weighting factor being zero in an idle region and ranging from zero to one i... | 08/23/2005 |
| 6931859 | Variable turbine cooling flow system Cooling air to the blades and disks of a gas turbine may be modulated to provide a variable turbine cooling flow. A bellows may be extended by providing a high pressure compressor discharge flow to an interior of the bellows. The bellows may be compressed when the i... | 08/23/2005 |
| 6918594 | Face seal assembly with composite stator A composite face seal has an annular seal rotor and an annular seal stator, both having a metal base portion and a radially extending flange. The flange has first and second axially facing surfaces. A first ceramic ring may be mounted to the first surface of the fla... | 07/19/2005 |
| 6919559 | High-temperature optical rotary and linear position sensor A device and method capable of measuring the optical rotary and linear position of items, that is reliable, accurate and capable of operating in harsh environments. The present invention utilizes optics to measure rotary and linear position. Unlike the prior art the... | 07/19/2005 |
| 6918598 | Hot air seal A hot air sealing arrangement for sealing between an inner surface of an exhaust duct conveying hot combustion products and an outer surface of a heat exchanger disposed within the exhaust duct includes an inner receiver attachable to the outer surface of the heat e... | 07/19/2005 |
| 6912782 | Forming and assembly method for multi-axial pivoting combustor liner in gas turbine engine A multi-axial pivoting liner within the combustion system of a turbine engine allows the system to work with minimum thermal interference, especially during system operation at transient conditions, by allowing the liner to pivot and slide about its centerline and r... | 07/05/2005 |
| 6907416 | Adaptive knowledge management system for vehicle trend monitoring, health management and preventive maintenance A method and an Adaptive Knowledge Management is provided. The Adaptive Knowledge Management System is used for assisting a user with decision making by providing real-time, on-line automated recommendations for actions in a monitored vehicle troubleshooting, perfor... | 06/14/2005 |
| 6903470 | High speed generator with high-power rotating rectifiers cooling system A rectifier hub and associated cooling method provide increased cooling efficiency for rotating rectifier diodes in a dry cavity generator. The rectifier hub has an inner and an outer circumferential surface and includes at least one pair of flow passages, and at le... | 06/07/2005 |
| 6890370 | High strength powder metallurgy nickel base alloy A nickel base super alloy composition wherein the ratio of molybdenum to tungsten or to the sum of tungsten and rhenium, Mo W | 05/10/2005 |
| 6887594 | Environmental and thermal barrier coating for ceramic components A component comprises a silicon-based substrate; and a protective coating for the substrate. The protective coating includes tantalum oxide (Ta2O5) and an additive for suppressing transformation from beta Ta2O5 to alpha Ta... | 05/03/2005 |
| 6885923 | Speed signal variance detection fault system and method A method and a system is provided, useable in electrical control sensors for shaft speed signal frequency change rate tests, detecting intermittent or “in-range”failures. The method estimates a short-term variance of the measured signal or signal rate of change,... | 04/26/2005 |
| 6881027 | Gearless/oilless gas turbine engine The complex mechanical gear trains and lubrication systems of conventional engine configurations are eliminated by using combinations of hydrodynamic air foil bearings, hydrodynamic solid geometry carbon seals/bearings, magnetic bearings, and electrical starter/gene... | 04/19/2005 |
| 6868675 | Apparatus and method for controlling combustor liner carbon formation An apparatus and method for controlling combustor liner carbon formation is provided. The apparatus includes a dome subassembly that is removeably affixed to a modular outer panel subassembly and a modular inner panel subassembly. Each panel subassembly includes pan... | 03/22/2005 |
| 6866727 | High temperature powder metallurgy superalloy with enhanced fatigue and creep resistance A nickel based superalloy composition comprising about 16.5 to about 20.5 weight % Co, about 9.5 to about 12.5 weight % Cr, about 1.8 to about 3.2 weight % Mo, about 4.25 to about 6.0 weight % W, about 3.0 to about 4.2 weight % Al, about 3.0 to about 4.4 weight % Ti... | 03/15/2005 |
| 6868325 | Transient fault detection system and method using Hidden Markov Models A transient fault detection system and method is provided that facilitates improved fault detection performance in transient conditions. The transient fault detection system provides the ability to detect symptoms of engine faults that occur in transient conditions.... | 03/15/2005 |
| 6861164 | Environmental and thermal barrier coating for ceramic components A component comprises a silicon-based substrate; and a protective coating for the substrate. The protective coating includes tantalum oxide (Ta2O5) and an additive for suppressing transformation from beta Ta2O5 to alpha Ta... | 03/01/2005 |
| 6843638 | Vane radial mounting apparatus A variable geometry vane for use in a turbine engine. The vane can be radially mounted in a shroud ring while outside the turbine engine. The shroud and vane assembly can then be mounted to an engine hub without disassembly of the shroud, eliminating the need for a ... | 01/18/2005 |
