Abstract: In accordance with at least one aspect of this disclosure, a pump comprises a pump rotor having a plurality of vanes therein configured to pump a fluid from a pump inlet to a pump outlet through rotation of the rotor about a rotational axis, an input shaft operatively connected to drive rotation of the rotor, and a bearing operatively connected to the input shaft configured to facilitate rotation of the input shaft. A shaft extender is operatively connected radially between the input shaft and the bearing. The input shaft includes a conical portion and the shaft extender includes a conical portion complementary to the conical portion of the input shaft. The shaft extender interfaces with at least the conical portion of the input shaft, when on the input shaft.

Abstract: A pump assembly includes a cylinder block defining a piston bore therein extending in an axial direction. A sleeve lines the piston bore. A piston is included in the piston bore, configured to reciprocate along a stroke in the axial direction within the sleeve. A piston ring is engaged circumferentially about the piston. The piston ring is fixed to the piston and is slidingly engaged to an inner surface of the sleeve.

Abstract: An introduced autonomous aerial vehicle can include multiple cameras for capturing images of a surrounding physical environment that are utilized for motion planning by an autonomous navigation system. In some embodiments, the cameras can be integrated into one or more rotor assemblies that house powered rotors to free up space within the body of the aerial vehicle. In an example embodiment, an aerial vehicle includes multiple upward-facing cameras and multiple downward-facing cameras with overlapping fields of view to enable stereoscopic computer vision in a plurality of directions around the aerial vehicle. Similar camera arrangements can also be implemented in fixed-wing aerial vehicles.

Abstract: An electrical distribution enclosure includes an electrically insulated panel defining an access portion of the enclosure and a load portion of the enclosure; at least one electrically insulated compartment panel positioned within the access portion; and two or more compartments within the access portion, each compartment separated from an adjacent compartment by an electrically insulated compartment panel, each of the two or more compartments having a front-accessible neutral connection, at least one front-accessible phase connection and a at least rear phase connection.

Abstract: A method for operating a multi-door oven apparatus is provided. In one example, the method comprises moving, by a mechanical device, a first oven door along a first path in a first direction orthogonal to a side surface of an oven, the side surface comprising an entrance to the oven. The method further comprises moving, by the mechanical device, the first oven door along a second path in a second direction parallel to the side surface, wherein moving the first oven door along the second path comprises moving the first oven door past a second oven door.

Abstract: A sample is introduced from a bioreactor to a chamber included in a manifold. The chamber includes at least a first probe. The at least the first probe is coupled to a controller. One or more measurements are performed on the sample while the sample is located in the chamber for a measurement period. The sample is returned from the chamber to the bioreactor after the one or more measurements of the sample have been performed.

Abstract: In accordance with at least one aspect of this disclosure, a system includes a rotor configured to rotate about a rotor axis within a pump housing. In embodiments, the rotor includes, a first end face configured to interface with a stationary port plate, a plurality of vane slots defined in the rotor arranged circumferentially about the rotor axis configured to accept a respective vane therein, and a plurality of lands between each vane slot, wherein each land includes a portion of the first end face. The rotor also includes, a lubrication pad defined in the first end face of at least one land between neighboring vane slots such that the lubrication pad is fed by the neighboring vane slots to induce buildup of a lubrication film between the first end face and the stationary port plate in the lubrication pad.

Abstract: A bearing assembly includes a first gear shaft aligned with a first axis and a second gear shaft aligned with a second axis. The second axis is oriented parallel to the first axis. A first bearing is supported on the first gear shaft and a second bearing is supported on the second gear shaft. A coupling mechanism extends between and radially clamps the first bearing to the second bearing. The coupling mechanism is operable to restrict relative radial movement between the first bearing and the second bearing.

Abstract: In accordance with at least one aspect of this disclosure, a system includes, a cylinder barrel configured to rotate within a pump housing of a pump operatively connected to a driving member of the pump via a first shaft. A piston is seated within a bore defined in the cylinder barrel. The piston is operatively connected to the driving member of the pump via a second shaft. The first shaft and the second shaft each include a ball end configured to seat within the driving member. In embodiments, the ball end of at least the second shaft is of silicon nitride.

Abstract: A turbine engine includes an engine core extending along an engine centerline and includes a compressor section, a combustor, and a turbine section in serial flow arrangement. A set of blades are circumferentially arranged in the turbine section and the compressor section. A set of dovetails mounts the set of blades to a disk, rotated about the engine centerline. Each dovetail can include a set of lobes defining complementary recesses, collectively defining a neck for mounting to the disk.

Abstract: A two stage fuel delivery system for an aircraft includes a first stage pump including an inlet connected to a source of fuel and an outlet connected to a combustor assembly, and a second stage pump including an inlet portion connected to the source of fuel and an outlet portion connected to the combustor assembly. A bypass valve is connected between the source of fuel, the inlet, and the inlet portion. The bypass valve selectively disconnects the second stage pump from the source of fuel. A metering valve is connected to the inlet and the inlet portion. The metering valve includes a metering valve inlet and a metering valve outlet. A pressure regulating valve is connected to the metering valve. A stage monitoring system is configured to detect a change in operation of the second stage and control the bypass valve.

Abstract: In accordance with at least one aspect of this disclosure, a system includes, a cylinder barrel configured to rotate within a pump housing of a pump operatively connected to a driving member of the pump via a first shaft. A piston is seated within a bore defined in the cylinder barrel. The piston is operatively connected to the driving member of the pump via a second shaft. The first shaft and the second shaft each include a ball end configured to seat within the driving member. In embodiments, the ball end of at least the second shaft is of silicon nitride.

Abstract: In accordance with at least one aspect of this disclosure, a pump system for an aircraft includes, a cylinder barrel configured to rotate within a pump housing of a pump, and a plurality of pistons seated within a respective bore defined in the cylinder barrel. Each piston further includes a piston ring disposed at an end thereof configured to form a hydrodynamic seal with an inner surface of the respective bore. Each respective piston ring is of silicon nitride. In embodiments, the piston ring can include a chamfer on at least a leading edge of the piston ring. In embodiments, the piston ring can include a cut therethrough configured to allow for thermal expansion of the piston ring.

Abstract: In accordance with at least one aspect of this disclosure, a system comprises, a cylinder barrel configured to rotate within a pump housing. In embodiments, the cylinder barrel includes a main cylindrical body, a center recess defined within the main cylindrical body configured to seat a drive shaft therein, and a plurality of bores defined in the main cylindrical body, extending in an axial direction, wherein the plurality of bores are spaced apart circumferentially relative to one another about the main cylindrical body radially outward of the center recess. Each of the plurality of bores are configured to seat a respective piston therein and allow fluid flow therethrough. In embodiments, the main cylindrical body is of silicon nitride.

Abstract: A variable displacement pump system can include a piston sleeve having at least a first inner diameter portion and a second in inner diameter portion and an actuator piston configured to be disposed within the piston sleeve. The actuator piston can have a first piston portion having a first outer diameter, and a second piston portion having a second outer diameter. The first outer diameter can be different than the second outer diameter. The first piston portion can be configured to seal to the first inner diameter portion of the piston sleeve. The second piston portion of the actuator piston can be configured to seal to the second inner diameter portion of the piston sleeve.

Abstract: A data processing apparatus is provided. Decode circuitry decodes a stream of instructions including a store instruction and a load instruction. Prediction circuitry predicts that the load instruction loads data from memory that is stored to the memory by the store instruction and the prediction is based on a hash of a program counter value of the store instruction.

Abstract: Systems and computer software are disclosed for AR devices having a display configured to display augmented, mixed, or virtual reality images to a user. The AR devices can comprise displaying a virtual control panel on the display, with the virtual control panel comprising a depicting of one or more targets. An output of an emission device that is intended to be directed to the one or more targets can be rendered. The AR device can also allow controlling, by the user based on input received by user interaction with the virtual control panel, one or more operations of the emission device.

Abstract: A gear pump includes gears received within a housing defining an inlet, an outlet and end plates. The gears have shaft portions on each of two sides of each of the two gears. The shaft portions are mounted in journal bearings. The journal bearings each have a gear side face adjacent one of the two gears. A remote face is on a remote side of the journal bearing remote from each of the two gears. There is a plurality of heat pipes in at least one of the journal bearings. The heat pipes move heat from the gear face of the at least one of the journal bearings to the remote face. The plurality of heat pipes is enclosed by the housing, and extend generally in an axial direction from an end adjacent the gear face to an end adjacent the remote face. A fuel supply system is also disclosed.

Abstract: A two stage fuel delivery system for an aircraft includes a first stage pump including an inlet connected to a source of fuel and an outlet connected to a combustor assembly, and a second stage pump including an inlet portion connected to the source of fuel and an outlet portion connected to the combustor assembly. A bypass valve is connected between the source of fuel, the inlet, and the inlet portion. The bypass valve selectively disconnects the second stage pump from the source of fuel. A metering valve is connected to the inlet and the inlet portion. The metering valve includes a metering valve inlet and a metering valve outlet. A pressure regulating valve is connected to the metering valve. A stage monitoring system is configured to detect a change in operation of the second stage and control the bypass valve.

Abstract: Various implementations include a method of applying a surgery reference marker to skin of a patient. The method includes providing a medical scanner having at least one positioning laser; disposing the patient in a desired position relative to the medical scanner such that the at least one positioning laser illuminates a portion of the skin of the patient; disposing a temporary tattoo on the portion of the skin of the patient, the temporary tattoo having at least one positioning indicator configured to be applied to the skin of the patient, wherein the temporary tattoo is disposed such that the at least one positioning indicator indicates a position of the at least one positioning laser; and applying the temporary tattoo such that the at least one positioning indicator is transferred to the skin of the patient.