Hamilton Sundstrand Patente

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A gas turbine engine shut-down system includes a pump configured to draw a flow of fuel from a source, a fuel nozzle configured to receive the flow of fuel from the pump, a fuel shut-off valve in fluid communication with the pump, a recirculation circuit for circulating excess fuel to a location upstream of the pump; a solenoid valve in communication with the pump and the recirculation circuit; and a fuel-bypass valve. The fuel-bypass valve includes a first opening connected to the fuel pump, a second opening connected to the fuel shut-off valve, a third opening connected to the recirculation circuit, a fourth opening connected to the solenoid valve, and a piston disposed within the fuel-bypass valve and movable between a plurality of positions.

A first inlet port, 38, extends radially through a valve sleeve, 27, into an internal bore, 200. A first outlet port, 38, extends radially outwardly through an outer periphery of the valve sleeve, 27. A second inlet port, 36, on an opposed side of the first outlet port, 38, from the first inlet port, 38, extends radially through a wall of the valve sleeve, 27. A valve spool, 41, is received in the internal bore, 200, and has a first channel, 40, at an outer peripheral surface selectively communicating the first inlet port, 38, to the first outlet port, 42. The valve spool, 41, has a second channel, 32, at the outer peripheral surface that communicates the second inlet port, 36, to an axial vent, 48, formed in an internal surface of the valve sleeve, 27. The axial vent, 48, extends axially to communicate the second channel, 32, to the first outlet port, 42.A pumping system, 20, is also disclosed.

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A header duct (100) and method of forming a header duct includes an inlet portion having a planar inlet, an outlet portion have a plurality of planar outlets (114a,114b), and a transition portion (118) extending continuously from the inlet portion (116) to the outlet portion (120). The transition portion (118) has a bend and internal topography defining a non-monotonic cross-sectional area distribution between the inlet and outlet portions. The transition portion (118) can further include a bulbous region extending in a lateral direction of the duct and a protrusion located along an inside radius of the bend.

A linear motor actuator (100) includes a plurality of stators (102) mounted stationary relative to one another along a common actuation axis. A translator rod (104) is mounted to the stators (102) for linear motion relative to the stators (102) along the actuation axis, wherein each stator (102) is magnetically coupled to the translator rod (104) to drive motion of the translator rod (104) along the actuation axis.

An actuator release mechanism comprising a longitudinal member, e.g. a piston 39, which is moveable axially to permit or prevent axial movement of the lock bolt 38 and hence deployment of the actuator. Movement of the piston 39 is due to the force of the lock bolt 38, under a spring force, on the one hand, and to the position and force of a linkage assembly on the other hand. The linkage assembly comprises a first link 42 fixed, at one end, e.g. by means of a piston lock pin 43, to the piston 39 and fixed at a pivot point 44 to a second link 45. The second link 45 is fixed to a rotational drive means, here a rotary solenoid or stepper motor 41, so as to rotate about a centre of rotation 46.

A gas bearing within a cylinder (110) is provided. The gas bearing comprises an anti-rotation tab comprising a first side and a second side, the anti-rotation tab sitting within a key way of the cylinder. Further, the gas bearing also comprises a first foil (420) extending in a first direction from a first end (420A) to the first side of the anti-rotation tab and a second foil (430) extending in a second direction from a second end to the second side of the anti-rotation tab.

A voltage driver 10 includes a voltage input, a voltage regulation controller 110 including an on/off input 150. The voltage regulation controller 110 is configured to control a switching converter in a first mode, a second mode, and at least one additional mode. The switching converter is configured to operate as an open pass switch in the first mode, is configured to operate as a closed pass switch in the second mode,, and is configured to operate as an overcurrent and overvoltage protection switch in the at least one additional mode. A discrete output driver control and monitoring circuit can be used to control the switching converter. The output driver control and monitoring circuit includes a controller 30 coupled to a communication bus 80 and is configured to provide high level control instructions to the communication bus 80.

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A system and method includes a multiplexed motor controller for controlling multiple motors with a weight and volume penalty comparable to that of a single controller system and method by receiving a plurality of inputs indicating a status, prioritizing a plurality of subsystems based on the status, multiplexing a plurality of operation commands in accordance with the prioritization, and generating a plurality of waveforms in accordance with the operation commands.

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A fluid degassing device can include a shell (101) configured to retain a selectively permeable hollow fiber bundle (113), wherein the shell (101) defines a first flow port (105) and a second flow port (107) and at least a third flow port (109), and a selectively permeable hollow fiber bundle (113) having a plurality of hollow fibers disposed within the shell (101) such that a first flow circuit is defined between the first flow port (105) and the second flow port (107), and a second flow circuit is defined in fluid communication with at least the third port (109) such that an inner channel of one or more of the hollow fibers is in fluid communication with at least the third flow port (109), wherein second flow circuit is partially fluidly isolated from the first flow circuit such that at least one first fluid cannot pass through a wall of one or more hollow fibers, but such that at least one second fluid can pass through the wall of the one or more hollow fibers. The shell (101) and the fiber bundle (113) include a non-cylindrical shape.

An onboard electrochemical system of an electrochemical cell (10) including a cathode (14) and an anode (16) separated by an electrolyte separator (12) is selectively operated in either of two modes. In a first mode of operation, water or air is directed to the anode, electric power is provided to the anode and cathode to provide a voltage difference between the anode and the cathode, and nitrogen-enriched air is directed from the cathode to an aircraft fuel tank or aircraft fire suppression system. In a second mode of operation, fuel is directed to the anode, electric power is directed from the anode and cathode to one or more aircraft electric power-consuming systems or components, and nitrogen-enriched air is directed from the cathode to a fuel tank or fire suppression system.

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