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| Number | Title | Issue Date |
| 8182931 | Coated fatigue critical components A coating process for fatigue critical components is provided. The coating process comprises the steps of providing a substrate having a first modulus of elasticity, depositing a layer of a material having a second modulus of elasticity less than the first modulus o... | 05/22/2012 |
| 8182248 | Vane pump with tilting pad radial bearings A vane pump comprises: a drive shaft that passes through the pump frame; a rotor coupled to the drive shaft that has multiple vanes and rotates within the pump frame in an axial direction about an axis of rotation with an outer rotor surface that has a radius that e... | 05/22/2012 |
| 8181725 | Aircraft tug An aircraft tug includes a tow bar which extends from a chassis, the tow bar operable to autonomously attach with an aircraft main landing gear assembly and transfer electrical power therebetween. ... | 05/22/2012 |
| 8181669 | Compliant check valve stop A check valve (10) includes a valve housing (14) having at least one valve opening (16). At least one petal (12) is located in the valve housing (14) and is configured to substantially cover the at least one valve opening (16 | 05/22/2012 |
| 8177953 | Method and apparatus for evaluation of coated parts A method of verifying performance of a coated part includes calculating a deflection value as a function of a predetermined strain threshold value and a total thickness of a test coupon that comprises a coating on a substrate. The coating of the test coupon is co-de... | 05/15/2012 |
| 8172512 | Accessory gearbox system with compressor driven seal air supply An accessory gearbox system for a gas turbine engine includes an accessory compressor mounted to a gearbox housing. The gearbox housing defines a seal air core, and the gearbox housing communicates a seal airflow through the seal air core. ... | 05/08/2012 |
| 8171745 | Compartment cooling loss identification for efficient system operation A galley cooling system comprises a plurality of galley cooling units each to be associated with separate galleys. A sensor senses a condition within each of the galleys. A control determines whether a sensed condition is indicative of efficient operation of a parti... | 05/08/2012 |
| 8169172 | Synchronous disturbance suppression in a variable speed motor drive A variable speed drive for an electric motor has an inverter for receiving pulse width modulation controls. The inverter communicates power signals to a poly-phase electrical motor. A resolver communicates signals from the poly-phase motor back to a motor control. T... | 05/01/2012 |
| 8167191 | High temperature seal for joining ceramic components such as cells in a ceramic oxygen generator A multi-layer seal arrangement includes a dissolution barrier between a braze alloy and a ceramic component. The inventive seal is useful for joining a ceramic component to another ceramic component or a metal component, for example. In one example, the braze compri... | 05/01/2012 |
| 8166343 | Processing system hardware diagnostics A method for diagnosing hardware failures in a data processing system includes a configuring a portion of a programmable logic device to create a state machine. The state machine tests a communication bus and a plurality of component devices connected by the communi... | 04/24/2012 |
| 8164866 | Identification and protection of an aerospace AC-DC power system in the presence of DC content due to faulty loads A fault protection system for an AC-DC distribution system detects the presence of DC content at individual loads, isolates the load responsible for the fault from the remainder of the distribution system, and blocks DC content from being propagated from the faulty ... | 04/24/2012 |
| 8162762 | Generator flexible drive coupling A generator assembly (6) includes a crankshaft (10), an accessory pulley drive shaft (36) operatively coupled to the crankshaft (10), and a flexible drive coupling member (40) operatively coupling the accessory pulley drive shaft (... | 04/24/2012 |
| 8162611 | Controllable pitch propeller with electrical power generation A propeller system includes a rotor hub which supports a multiple of propeller blades. An electrical generator is mounted between a gearbox and the rotor hub to generate electrical power to drive a pitch change system within the rotor hub. ... | 04/24/2012 |
| 8154175 | Sensing device A sensing device is disclosed that includes a bistable snap mechanism having a snap element operatively connected to an input element and an output element. The snap element has two discrete positions that provide the output element in one of first and second positi... | 04/10/2012 |
| 8149551 | Systems and methods involving motor drive ground fault interrupts A method comprises determining whether a ground fault on a bus (110) operative to drive the system (100) exceeds a first threshold level, (502) receiving values of phase currents of a first motor, (504) calculating a sum of the values of ... | 04/03/2012 |
| 8148867 | Permanent magnet brushless machine with magnetic flux regulation A permanent magnet machine (PMM) has a generally cylindrical permanent magnet (PM) rotor that has multiple PM rotor poles arranged around a rotor axis of rotation; and a stator with two generally cylindrical and concentric yokes, an inner yoke proximate the PM rotor... | 04/03/2012 |
| 8148866 | Regulated hybrid permanent magnet generator A permanent magnet rotor for an electrical generator has pole pieces with permanent magnets. A control coil is associated with the pole pieces. A current flow through the coils is controlled to achieve a desired output voltage at an output for the generator. ... | 04/03/2012 |
| 8148842 | Electrical power generation system having multiple secondary power distribution assemblies with integral power conversion An improved EPGS with an integrated electrical system architecture uses SPDAs with localised power converters to provide the necessary types of power to their respective electrical loads so that a single type of primary power bus may be used to connect its PDAs to r... | 04/03/2012 |
| 8147579 | Dispatch critical fuel tank inerting system for aircraft An air inerting system for supplying nitrogen-enriched air to a fuel tank on a vehicle includes an air separation module. The air separation module has an inlet for receiving air to separate oxygen, and an outlet for delivering nitrogen-enriched air to a downstream ... | 04/03/2012 |
| 8147208 | Axially segmented impeller An impeller with an axial inlet in relation to an impeller axis for pressurizing a fluid has: a nose section that has a nose section central hub and multiple nose vane sections, each nose vane section extending from a leading edge to a generally radial nose section ... | 04/03/2012 |
| 8147143 | Bump foil hydrodynamic thrust bearing A thrust bearing for a rotary machine includes first, second and third layers. The second layer includes a corrugated foil arranged between the first and third layers. The corrugated foil includes a wall having peaks engaging the first layer and valleys engaging the... | 04/03/2012 |
| 8143759 | Laminated stator assembly A stator core for a generator includes a multiple of core laminations along an axis, each of the multiple of core laminations define at least one leg which extends in a radial direction from the axis. ... | 03/27/2012 |
| 8138642 | Oil cooled generator A rotor for a dynamoelectric machine may include a rotor shaft having a first shaft and a second shaft within the first shaft. The two shafts include discharge orifices for communicating a cooling fluid through the machine. A rotor core of the machine includes a lam... | 03/20/2012 |
| 8137085 | Gear pump with slots in teeth to reduce cavitation A gear pump comprises a drive gear being mounted for rotation about a first axis and having a plurality of gear teeth at a radially outer location. A driven gear is mounted for rotation about a second axis, and having a plurality of teeth at a radially outer locatio... | 03/20/2012 |
| 8134331 | Motor drive system with flux regulated PM generator A method of generating and controlling power for an alternating current (AC) motor by means of at least one controlled permanent magnet machine (PMM) with a permanent magnet (PM) rotor and a stator with a magnetic flux diverter circuit for controlling the output of ... | 03/13/2012 |
| 8133027 | Integrated actuator for a propeller system A propeller system includes a propeller hub which supports a multiple of propeller blades. A tailshaft extends from a propeller hub portion of the propeller hub along an axis of rotation with a propeller pitch change yoke mounted within the propeller hub for movemen... | 03/13/2012 |
| 8132758 | Environmental control system pack pallets An Environmental Control System (ECS) includes a pallet which supports at least one ECS component. The pallet defines a pallet surface that matches an aircraft outer mold line. ... | 03/13/2012 |
| 8132480 | Pump gear and pump assembly for a generator A pump gear includes a pump gear body having involute teeth that each have an involute surface that extends between a tooth tip and a tooth base. The involute surface includes at least reference points A-D, with reference point A near the base, reference point D nea... | 03/13/2012 |
| 8130479 | Ground fault interrupts for solid state power controllers A solid state power control scheme is provided with a ground fault interrupt function. Essentially, if a neutral wire is associated with the power supply, the current is sensed in that neutral wire. The sensed neutral wire current is subtracted from a summed current... | 03/06/2012 |
| 8127912 | Feedback torque limiter A feedback torque limiter device for an actuator having an input shaft, output shaft and gear reduction for transmitting torque from the input shaft to the output shaft comprises an output torque sensor, and input torque limiter and a feedback mechanism. The output ... | 03/06/2012 |
| 8127786 | Proportional selector valve for selecting between two pressure sources A selector valve selects between the supply of a primary pressure supply and a secondary pressure supply to a downstream use. The selector valve moves between a first position at which it supplies fluid from a primary line to the use, and a second position at which ... | 03/06/2012 |
| 8127524 | Gas turbine fuel metering unit A fuel system for a turbine engine is provided. The fuel system includes a positive displacement pump driven by an electric motor. The pump is rotated in a first direction to deliver fuel to the turbine engine, and a second direction for evacuating fuel from the tur... | 03/06/2012 |
| 8123161 | Aircraft landing gear unlock actuator This disclosure relates to a landing gear system that includes a landing gear strut rotatable between stowed and deployed positions. A lock-stay is connected to the landing gear strut and is movable between locked and unlocked conditions. An unlock actuator is conne... | 02/28/2012 |
| 8120206 | Method of detecting a sustained parallel source condition A method of detecting a parallel source condition includes calculating a reactive power, comparing the reactive power to a predetermined threshold, and determining a parallel source condition in response to the reactive power exceeding the predetermined threshold. | 02/21/2012 |
| 8115441 | On-line measurement of an induction machine's rotor time constant by small signal d-axis current injection A controller continually updates rotor time constant estimation of an induction machine by interrogating the induction machine with a small signal oscillation and monitoring the response. The small signal oscillation is injected onto the d-axis current command signa... | 02/14/2012 |
| 8114555 | Hardware system for high pressure electrochemical cell A method of manufacture includes an electrochemical cell structure having a first conductive member and a second conductive member. The first conductive member is spaced from the second conductive member. An adhesive is disposed between the first conductive member a... | 02/14/2012 |
| 8113804 | Vane pump with rotating cam ring and increased under vane pressure An example vane pump comprises a shaft driving a rotor. The rotor has a plurality of vane grooves, with a vane received in each of the plurality of vane grooves, and an under vane chamber for communicating a pressurized fluid into the grooves to bias the vanes radia... | 02/14/2012 |
| 8113784 | Coolable airfoil attachment section A rotor blade suitable for use in a gas turbine engine includes an attachment section which defines at least one internal cooling passage along a passage axis through the attachment section. ... | 02/14/2012 |
| 8113767 | Auxiliary power unit inlet duct with acoustic silencing An inlet duct for an auxiliary power unit comprises an inlet end, and extends to an outlet end. At least one splitter is positioned within the duct and between the inlet and the outlet end to sub-divide an interior of the duct into plural flow paths. ... | 02/14/2012 |
| 8112184 | Auxiliary power unit with dual use of speed signals An auxiliary power unit has a speed sensor for sensing a speed of operation of the auxiliary power unit. The speed sensor sends a signal to an electronic control box. The electronic control box is operable to control the auxiliary power unit. A branch line is for co... | 02/07/2012 |
