Abstract: Technologies are described for devices and methods to seal a diaphragm to a body exterior seal periphery. The methods may comprise rotating a handwheel of a bonnet assembly to move a load plate to apply a compression force to a top portion of a transition pressure ring. The top portion of the transition pressure ring may have a circular cross section. A bottom portion of the transition pressure ring may include a bead that may project out from a bottom surface of the bottom portion and may have a congruent shape and size as the body exterior seal periphery. The body exterior seal periphery may not be congruent to the circular cross section of the top portion. The compression force may press the bead against a diaphragm assembly and the diaphragm against the body exterior seal periphery, to seal the diaphragm to the body exterior seal periphery.

Abstract: A Scotch yoke actuator includes a housing formed with four piston bores spaced equally 90° from each other, a shaft with four yokes, each of the yokes having a slot, and four pistons including two pairs of 180° opposing pistons, one pair of the opposing pistons being orthogonal to the other pair of the opposing pistons. Each of the pistons is arranged for linear motion in one of the piston bores. Each of the pistons includes a piston rod which includes a piston pin which is slidable in the slot. Linear motion of the pistons in the piston bores causes rotation of the shaft.

Abstract: A portable respirator as described may include an inflatable bag and a respirator body. The inflatable bag may be arranged to provide air to a patient through a face mask or an endotracheal tube in response to compression/retraction actions applied to the inflatable bag. The respirator body may include a first cover portion and a second cover portion arranged to enclose moving components of the portable respirator and define a substantially circular opening for the inflatable bag to be fitted through, a motor, a pair of levers positioned on opposing sides of the substantially circular opening, and a cam mechanically coupled to the motor and arranged to move the pair of levers in response to a rotation action by the motor such that the pair of levers apply the compression/retraction actions to the inflatable bag fitted through the opening.

Abstract: Technologies are described for a diaphragm. The diaphragm may comprise a structure. The structure may be a disc shape with a top and bottom side. The top and bottom sides may be circular in outline. The diaphragm may comprise a diaphragm stud at a center point on the top side. The diaphragm stud may be configured to couple with a connector of a bonnet assembly. The diaphragm may comprise a diaphragm bead on the bottom side. The diaphragm bead may be along a first axis. The diaphragm may comprise at least one tab which may extend radially from the structure along at an outer edge of the structure. The at least one tab may engage with a bonnet notch of a bonnet assembly to align the diaphragm to the bonnet assembly.

Abstract: Technologies are generally described for a two-piece filter assembly for centrifugal pump assemblies. A filter portion optionally made from recyclable material may receive contaminated oil from the oil path, through the filter, and provide the filtered oil back to the sump. The filtered oil is then reclaimed by the oil ring from the sump to lubricate the bearings. The filter portion may be removable from the plug portion and the plug portion may be placed back onto the pump assembly with a new filter portion. In some examples, moisture absorbing beads are placed inside the filter portion to remove moisture from the filtered oil.

Abstract: Technologies are generally described for multiple individual connectors in a single connector assembly. The individual connectors may be any form-fit suitable connectors such as USB type connectors and similar ones. The connector assembly may be circular, oval, rectangular, or other shapes. Coupling between the plug and receptacle of the connector assembly may be through threads, pressure, a click-on mechanism, screws, or other compatible mechanisms. Off-the-shelf individual connectors may be fitted with a module adaptor, then inserted into an accordingly shaped inside portion of the outer shell, and held in place through a latching mechanism or similar. Alternatively, the connector assembly may be formed with the individual connectors and cabling may be added subsequently. In some examples, post retention or backshell retention may be implemented in conjunction with the plug connectors.

Abstract: A Helmholtz resonator having a plurality of resonator chamber modules formed into an array. The array is configured to dampen sound. A module of the plurality of resonator chamber modules includes a first chamber and a second chamber. The first and second chambers have different lengths and are tuned to dampen different frequencies of sound.

Abstract: Technologies are generally described for pneumatically actuated parallel grippers that include a frame, a linkage system, two pistons, and a pair of slidable plates. The linkage system includes three or more links comprising a central link that is pivotably coupled to the frame, a first link coupled between a first piston and a first end of the central link, and a second link coupled between a second piston and a second end of the central link. The linkage system is arranged to synchronize motion between the first and second pistons. The pistons are further coupled to the slidable plates such that synchronized movement of the pistons translates into synchronized motion of the slidable plates. The parallel gripper is readily adaptable for use in gripper applications; and it is simple to service without the necessity for costly high tolerance and high precision parts.

Abstract: Technologies are generally described for holding an impeller of a pump assembly in place axially with an impeller locking collar by loading the collar against a ring element. In a centrifugal pump assembly, one side of the shaft has a larger diameter for the impeller to abut against. The other side of the shaft may be fitted with an impeller locking collar comprising two portions that can be threaded together and hold the impeller in place by tightening against a ring element such as a split ring or spiral lock. Anti-rotation to avoid loosening of the impeller locking collar may be achieved by providing counter threads against a shaft rotation. Secondary anti-rotation may be provided by one or more set screws in the impeller locking collar.

Abstract: Technologies are described for dual motion shutoff valve assemblies. In various examples, valve assemblies include a sequencing drive mechanism and an eccentric shaft mechanism operable to linearly retract the valve disk from a gasket surface to effectively reduce scratching and friction of the gasket surface during valve opening and closing operations. In some examples, the sequencing drive may include two interlocking concentric driver rings, a retaining housing, and roller lock pins. Three guided pins of the sequencing drive may be configured to prevent the valve from rotating, while also causing the valve to retract linearly from the gasket surface via the eccentric shaft. Following retraction, an inner driver of the sequencing drive may allow the roller lock pins to move and lock the outer driver, which in turn may lock the valve disk to the shaft and rotate along with the shaft, which may be a single or dual shaft.

Abstract: There is provided a method of generating a control strategy based on at least three switching states of a matrix converter. The at least three switching states are selected based on at least a predicted output current, associated with each switching state, and a desired output current. In particular, mathematical transformations of a desired output current as well as output currents associated with each of a plurality of switching states are used to identify appropriate switching states.

Abstract: Technologies are generally described for valve assemblies that include a valve body whose inner wall defines two ports and a controllable flow path that extends along the inner wall between the two ports of the valve body. Each port may be fitted with a corresponding gasket. A rotatable member disposed in the controllable flow path of the valve body may include a hemispherical-shaped body with a substantially flat disk-shaped surface portion, and a seal ridge formed about a perimeter of the substantially flat disk-shaped surface portion. During opening and closing operation, the seal ridge may be selectively engaged with either one of the gaskets reducing an initial contact surface, and thereby reducing friction between the rotatable member and the gaskets.

Abstract: A motor assembly for driving a pump or rotary device features a power plane with a circular geometry to be mounted inside a space envelope having a similar circular geometry formed on an end-plate between an inner hub portion and a peripheral portion that extends circumferentially around the space envelope of the end-plate. The power plane is a multi-layer circuit board or assembly having: a power layer with higher temperature power modules for providing power to a motor, a control layer with lower temperature control electronics modules for controlling the power provided to the motor, and a thermal barrier and printed circuit board layer between the power layer and the control layer that provides electrical connection paths between the power modules of the power plane and the control electronics modules of the control layer, and also provides insulation between the power layer and the control layer.

Abstract: Devices to couple a drive hub to a driven hub. The devices may comprise a drive hub contoured end connected to a first end of a spacer column and to a spacer drive hub flange. A portion of the drive hub contoured end may project radially out from the spacer column with a first contoured side and a first flat side and may allow movement in an axial direction and transmit torque and an axial load. The devices may comprise a driven hub contoured end connected to a second end of the spacer column and to a spacer driven hub flange. A portion of the driven hub contoured end may project radially out from the spacer column with a second contoured side and a second flat side and may allow movement in an axial direction and transmit torque and an axial load.

Abstract: The invention relates to an electrically conductive contact element (2) for an electric plug connector. The electrically conductive contact element (2) comprises a contact region (4) for making detachable electric contact with a mating contact element of a mating plug connector, and comprises a cable connecting region (6) for the connection of a cable. The contact element (2) comprises a cooling cavity (24), which opens into a distal opening (22) of the cable connecting region (6) which is arranged opposite the contact region (4).

Abstract: A motor assembly includes an electric motor with an output shaft. A motor frame houses the electric motor so that the output shaft protrudes from an end of the motor frame. A plate assembly is coupleable about the output shaft to the end of the motor frame. The plate assembly has a cavity that houses motor drive electronics. The plate assembly further defines a duct that extends between a central opening and one or more openings on an outer radial wall of the plate assembly. A fan is configured to flow air over one or more surfaces of the plate assembly and causes to flow through the duct to inhibits heat transfer between the electric motor and the motor drive electronics.

Abstract: Apparatus and methods for supplying DC power to control circuitry of a matrix converter is provided. In certain embodiments, a matrix converter includes an array of switches having AC inputs for receiving a multi-phase AC input voltage and AC outputs for providing a multi-phase AC output voltage to a load, such as an electric motor. The matrix converter further includes control circuitry for opening or closing individual switches of the array, and a clamp circuit connected between the AC inputs and AC outputs of the array and operable to dissipate energy of the load in response to an overvoltage condition, such as an overvoltage condition arising during shutdown. The clamp circuit includes a switched mode power supply operable to generate a DC supply voltage for the control circuitry.

Abstract: Rotating equipment includes driver equipment, driven equipment and a rotating shaft coupling. The driver equipment includes a driver support connected to a stationary driver shaft, and also includes a driver arranged on the driver support with a driving shaft to rotate and provide a rotational torque. The driven equipment includes a driven unit support connected to a stationary driven unit shaft, and also includes a driven unit arranged on the driven unit support with a driven shaft to respond to the rotational torque and rotate. The rotating shaft coupling couples the driving shaft to the driven shaft and applies the rotational torque from the driving shaft to the driven shaft. The stationary driver shaft couples to the stationary driven unit shaft to provide a static torque load to counteract the rotational torque applied from the driving shaft to the driven shaft during operation.

Abstract: A system may detect a vibration being applied to a tuned vibration absorber. The tuned vibration absorber may include a beam, a mass, springs, a sensor, and an actuator. The mass may be disposed on the beam at a current position. The actuator may be configured to adjust a position of the mass on the beam. The system may identify a target position of the mass on the beam based on the detected vibration. The system may generate a drive signal, based on the target position, to control the actuator to adjust the position of the mass on the beam. The system may control the actuator to adjust the position of the mass from the current position on the beam to the target position on the beam to attenuate the vibration.

Abstract: A resistor assembly for a motor drive circuit for an electric motor assembly can have a generally circular shape. The resistor assembly includes a resistor with input and output connectors and a pair of conductor elements extending from the input and output connectors. The pair of conductor elements extend adjacent each other along a curved serpentine path so the resistor has a generally circular outer perimeter and a generally circular inner perimeter. The curved serpentine path of the pair of conductor elements allows current to flow through the pair of conductor elements so that magnetic fields generated by the current flow through the pair of conductor elements cancel each other, thereby providing the resistor with low inductance.