Abstract: A portable pumping system provides insulin or other drugs to a user. A shape memory element is used to actuate the pump and an intelligent system controls the actuator in order to minimize stresses within the system and provide accurate and reliable dosage delivery. The control system utilizes various types of feedback to monitor and optimize the position of the pumping mechanisms. Physical design aspects also minimize stress and the combination of the physical design aspects and the intelligent operation of the system results in a lightweight and cost effective pump that may be used in a disposable fashion if desired.

Abstract: A backup system is provided that has a local electric motor and pump for some or all of hydraulic actuators. A local backup hydraulic actuator has two power sources, hydraulic as primary and electrical as backup. During normal operation, the hydraulic actuator receives pressurized fluid from a hydraulic system and the fluid flow to the chambers is controlled by a servo valve. If the hydraulic system fails, the electronic controller detects the failure by observing the signal indicative of the pressure from the pressure sensor, and the controller powers the local hydraulic pump to provide high pressure hydraulic fluid to the hydraulic actuator via the servo valve.

Abstract: Disclosed is a drive circuit-integrated electric compressor, which is adapted to cool a power semiconductor element in a motor drive circuit with good efficiency without increasing the temperature of sucked refrigerant gas and while suppressing increase in pressure loss in a path for cooling. Specifically disclosed is a drive circuit-integrated electric compressor into which a motor drive circuit having a power semiconductor element is incorporated integrally, characterized in that the electric compressor is configured so that the power semiconductor element in the drive circuit is cooled by refrigerant gas to be discharged.

Abstract: Brushless DC motor (4) is driven based on a first or second waveform signal output from switching determination unit (11), which switches outputting so that a first waveform signal by first waveform generation unit (6) is output when the speed of rotor (4a) is determined to be lower than a predetermined speed, and a second waveform signal by second waveform generation unit (10) is output when the speed of rotor (4a) is determined to be higher than the predetermined speed. Thereby, drive is stable even at high speed/under high load, and a driving range is extended.

Abstract: A compression device a rotor and stator in a case, a shaft coupled to the rotor, and a compressor coupled to the shaft to suction, compress, and discharge refrigerant within the case. At least one bearing is used to support the shaft, and the shaft has a diameter that is 0.114 times equal to or larger than and 0.138 times equal to or smaller than an outer diameter of the stator at at least one reference position.

Abstract: An impeller is provided that may be used in compressors or turbines. In another aspect of the present invention, a fiber or a bundle of fibers is woven to form at least two blades of an impeller. Yet another aspect of the present invention employs a peripheral component woven around impeller blades. An additional conductive fiber or bundle of fibers is woven into the impeller in a further aspect of the present invention. Moreover, an aspect of the present invention provides a chilling system that includes at least one compressor, at least one wave rotor, and a refrigerant.

Abstract: According to one embodiment, a motor stator includes a substantially cylindrical stator iron core and insulators. The stator iron core includes a yoke, teeth, and U-shaped grooves. The U-shaped grooves are formed on the circumference of the yoke in the axial direction. The insulators each include an outer circumference wall, hoisting drums, inner guards, and at least three engagement claws. The engagement claws are located spaced apart in the circumferential direction on the outside of the outer circumference wall and fitted in axial-direction ends of the U-shaped grooves, respectively. One of the engagement claws is arranged such that a first circumferential-direction side portion of the engagement claw is in contact with a first side wall of one U-shaped groove. Another is arranged such that a second circumferential-direction side portion of the engagement claw is in contact with a second side wall of another U-shaped groove.

Abstract: A motor-driven compressor is to be mounted to a first mounting of a vehicle. The compressor includes a compressor body that is electrically powered to draw in fluid for compression and to discharge the compressed fluid, and a second mounting for securing the compressor body to the first mounting. The second mounting includes a first mounting member having a first mounting hole, a second mounting member provided away from the first mounting member and having a second mounting hole, a resin member integrally formed with the first and second mounting members and provided at least between the first mounting member and the compressor body, a first fastening member inserted through the first mounting hole for securing the first mounting member to the first mounting, and a second fastening member inserted through the second mounting hole for securing the second mounting member to the compressor body.

Abstract: A motor-driven compressor includes a connector to which a first and second conductors are connected, and a connector case receiving the connector. The connector case includes a first case member and a second case member. A seal member is provided between the first and second case members. The first case member has a first sealing surface extending along the periphery of the first case member. The second case member has a second sealing surface extending along the periphery of the second case member and facing the first sealing surface. The seal member includes a main seal portion for sealing between the first sealing surface and the second sealing surface. The main seal portion has a first peripheral seal portion for sealing the periphery of the first conductor inserted therethrough and has a second peripheral seal portion for sealing the periphery of the second conductor inserted therethrough.

Abstract: A turbocharger includes a compressor housing (2) for accommodating a compressor wheel (5) drivable by an electric motor (21) and an electric motor (21) for driving a compressor wheel (5) accommodated in a compressor housing, the electric motor being supplied with electric power through at least one motor plug connector (12). The turbocharger further comprises a turbine housing (4), a center housing (3) for accommodating a shaft (6). The compressor wheel is driven by the turbine wheel (8) via the shaft (16) and can additionally be driven by the electric motor, where the compressor housing further includes at least one main power plug connector (16) disposed on an axial side of the compressor housing, facing the electric motor.

Abstract: A portable pumping system provides insulin or other drugs to a user. A shape memory element is used to actuate the pump and an intelligent system controls the actuator in order to minimize stresses within the system and provide accurate and reliable dosage delivery. The control system utilizes various types of feedback to monitor and optimize the position of the pumping mechanisms. Physical design aspects also minimize stress and the combination of the physical design aspects and the intelligent operation of the system results in a lightweight and cost effective pump that may be used in a disposable fashion if desired.

Abstract: A labyrinth seal assembly for an electrical submersible pumping system that communicates downhole pressure to a pump motor while sealing wellbore fluids from the motor. The labyrinth seal assembly includes a chamber circumscribing a pump shaft, labyrinth tubes, upper and lower shaft seals, and inner and outer guide tubes coaxially circumscribing the shaft. One labyrinth tube has an end in fluid communication with the wellbore fluid and another has an end in fluid communication with the pump motor. The labyrinth tubes extend into the chamber from opposite directions and each have an opening distal from where they enter the chamber. A port is provided in the inner guide tube distal from the upper shaft seal, and a port in the outer guide tube is provided proximate the upper shaft seal. Thus a labyrinth path is provided between the upper shaft seal and the chamber.

Abstract: Equipment having an energy management system includes an articulated arm, a work implement, an energy management system, and a hydraulic circuit. The articulated arm includes hydraulic actuators designed to maneuver the articulated arm, and the work implement is fastened to the articulated arm. The energy management system is adjustable between a first configuration and a second configuration, and includes a hydraulic rotating machine and an electric rotating machine coupled to the hydraulic rotating machine. When the energy management system is in the first configuration, the hydraulic rotating machine and the electric rotating machine function as an electric motor powering a hydraulic pump. When the energy management system is in the second configuration, the hydraulic rotating machine and the electric rotating machine function as a hydraulic motor powering an electric generator.

Abstract: An object is to provide an inverter module that can ensure satisfactory anti-vibration strength, moisture resistance, and isolation for each of the upper and lower boards of the inverter module and that can reduce the weight and cost, and to provide an integrated-inverter electric compressor. In an inverter module (21) in which a power system board (23) and a control board (31) are integrated via a resin case (22), the inverter module (21) is configured such that the power system board (23), on which a semiconductor switching device (24) is mounted, is provided at the lower part of the resin case (22) and the control board (31), on which a control-and-communication circuit is mounted, is provided thereabove.

Abstract: A pump for a fuel system is provided. The pump may have a pumping mechanism and an electric motor connected to drive the pumping mechanism. The pump may also have a low-pressure inlet passage in fluid communication with the pumping mechanism, a pressurized inlet passage in fluid communication with the pumping mechanism, a first outlet passage in fluid communication with the pumping mechanism, and a second outlet passage. The pump may further have a valve movable from a first position at which the second outlet passage is blocked from the pumping mechanism, to a second position at which the second outlet passage is in fluid communication with the pumping mechanism.

Abstract: A motor-driven compressor includes a housing, a rotary shaft, a compression mechanism and an electric motor. The housing includes a suction port and a discharge port. The compression mechanism is disposed in the housing and compresses refrigerant flowed through the suction port into the compression mechanism and discharges the refrigerant through the discharge port. The electric motor is disposed in the housing and drives the rotary shaft to rotate to drive the compression mechanism. The electric motor includes a rotor fixedly mounted on the rotary shaft and a stator fixed to the housing. The rotor includes a permanent magnet and a compressor interior environment improvement agent containing at least one of an absorbent for absorbing moisture and a neutralizer for neutralizing acid.

Abstract: A fuel pump has collar members, which are inserted in end portions of brush insertion holes of an end cover on an opposite side from brushes. The fuel pump has brush terminals press-fitted into the collar members. The brush terminals are connected to annular terminals, which are inserted in a secondary mold member by molding. Tip end portions of the collar members are press-fitted into the secondary mold member. Because of the press-fitting, an insulative resin intervenes between the brush terminals or between the annular terminals, to which different voltages are applied. Accordingly, passage of a leak current through fuel can be prevented, and electric corrosion can be prevented.

Abstract: The fan comprises a first electromechanical module including a wheel supported by a shaft coupled to a driving motor, a second mechanical module including a body delimiting a space for receiving the first electromechanical module in which the wheel and the driving motor are received, and a third electronic module including a plurality of electronic components. The third electronic module includes a housing in which the plurality of electronic components is housed, the housing also comprising a deflagration protection exhaust comprising an upper wall and two inclined walls extending on either side of the upper wall so as to form a space extending substantially axially between the upper surface of the housing and the upper wall in order to allow the discharge of overpressures in case of deflagration.

Abstract: The refrigeration compressor includes a cylinder block carrying a crankshaft and a stator of an electric motor, whose rotor is mounted to the crankshaft; and an oil pump presenting: a tubular sleeve affixed to the crankshaft or to the rotor and having a pump body internal to the tubular sleeve and carried by the cylinder block or by the stator. A fixation rod is superiorly articulated to the cylinder block or to the stator and has a lower portion angularly and freely displaced orthogonally to the articulation axis and around which the lower end portion of the pump body is axially retained and slidably mounted, orthogonally and coplanar to the rotation axis of the rotor. The tubular sleeve is provided with an upper tubular portion having a circumferential groove, which fits and retains, rotationally and axially, a tubular metallic connector telescopically mounted and retained to the rotor or to the crankshaft.

Abstract: A transformer T1 receives a sinusoidal signal on the primary side. The transformer T1 is provided with a terminal 3, a terminal 5, and a center tap 4 on the secondary side. The center tap 4 is connected to the anode of a diode D1. The cathode of the diode D1 is connected to the cathode of a diode D2 and one electrode of a capacitor C1. The other electrode of the capacitor C1 is connected to the anode of a diode D3 and a connection point of the second electrode of a piezoelectric element C2 and the first electrode of a piezoelectric element C3. The second electrode of the piezoelectric element C3 is connected to the terminal 3. The first electrode of the piezoelectric element C2 is connected to the cathode of the diode D3, the anode of the diode D2, and the terminal 5.

Abstract: A system for providing fuel to an engine fuel delivery system and to an exhaust aftertreatment system associated with an engine. The system includes a fuel source, a pump being operable in a first state to pump fuel from the fuel source to the engine fuel delivery system, and the pump being operable in a second state to pump fuel from the fuel source to the exhaust aftertreatment system, wherein the first state corresponds to a first rotational direction of the pump and the second state corresponds to a second rotational direction of the pump.

Abstract: A piezoelectric fan includes reinforcing plates that increase the rigidity of a portion of the vibrating plate corresponding to a gap between a piezoelectric element and a fixing plate. First ends of the reinforcing plates are attached to portions of the vibrating plate on both sides of piezoelectric elements in the width direction, and second ends of the reinforcing plates are attached to a fixed end of the vibrating plate such that the second ends and the fixing plate sandwich the fixed end of the vibrating plate therebetween and such that the reinforcing plates extend over the gap. The reinforcing plates prevent vibration of the portion of the vibrating plate corresponding to the gap, prevent a portion of vibration energy generated by expansion and contraction of the piezoelectric elements from being consumed in the portion corresponding to the gap, and increase the amplitude of the vibration of blade ends.

Abstract: A stator core is formed of a main core including a first segment core, second segment core, and plate body, and a third segment core (I-shaped core). A rotor is disposed in a rotor insertion hole of the stator core, and an output shaft of the rotor is supported by a bearing unit. A resin molded body covers a winding of an exciting section of the motor, a circuit wiring board, and a part of a power supply connecting body. The resin molded body also covers a part of the third segment core (I-shaped core). A rotary vane or the like is mounted near the tip of the output shaft, and a blower or the like is formed.

Abstract: Refrigerant compressor, comprising an electric drive unit (2), a cylinder housing (1), a crankshaft (11) which may be driven by the electric drive unit, wherein the cylinder housing (1) has the main bearing for the crankshaft (11), and a piston (12), driven by the crankshaft (11) and guided in the cylinder housing (1), which compresses the refrigerant. To allow the main bearing length to be dimensioned as large as possible, it is provided that at least one height compensation element (26) is situated between the cylinder housing (1) and the electric drive unit (2) in order to keep an overall height of the cylinder housing and the respective drive unit practically identical within a compressor family having drive units of different heights.

Abstract: Provided is an inverter-integrated electric compressor whose inverter section is molded using a urethane resin and which is excellent in joining reliability of electrically connected section. An inverter-integrated electric compressor, wherein the compressor incorporates a motor and wherein a motor drive circuit including the inverter is provided in a containing space surrounded by a compressor housing. A crimping section of a terminal of a conducting wire connected to the inverter is molded, together with the inverter, in a resin charged into the containing space. A gap at the crimping section, the gap being open to the outside, is previously covered and sealed by a gap sealant.

Abstract: Disclosed is a low-cost, inverter-integrated electric compressor with which a high degree of design freedom is maintained, high vibration resistance can be achieved by reliable anchoring of the circuit components, the weight can be reduced easily, and which has excellent operational stability. An inverter-integrated electric compressor has a built-in motor and has a substrate provided with a motor drive circuit including an inverter. In the inverter-integrated electric compressor, after electric components including the substrate have been fixed in a housing space surrounded by a compressor housing and have been assembled, the housing space is filled with an insulating resin, and at least a part of the electric components are sealed by the solidified filling resin.

Abstract: A drive control device of a fuel pump for sucking fuel in a fuel tank supplying the fuel to an internal combustion engine, and using a motor with a brush as a drive source thereof. The drive control device includes a starting current reduction control device that starts the fuel pump in a state where a drive current of the fuel pump is reduced.

Abstract: Provided is a low-cost compressor having excellent operation stability which enables the improvement of the stability of a control circuit by shielding electromagnetic noise and the effective prevention of the vibration of a control substrate while the design flexibility is maintained at the same high level as that of conventional ones.

Abstract: A multistage electric motor includes a plurality of motor stages connected in series, each motor stage comprising a stator, and a rotor; a plurality of cooling fluid paths, each cooling fluid path forming a recirculating loop independent of the other cooling fluid paths, each cooling fluid path in communication with the stator of one of motor stages; and a cooling fluid flowing through each cooling fluid path, the cooling fluid removing heat from the stator of each motor stage. A submersible pump including the multistage electric motor, and a method of cooling the multistage electric motor are also described.

Abstract: Provided is an inverter-integrated electric compressor excellent in joining strength and joining reliability at electrical joint. An inverter-integrated electric compressor wherein a motor is incorporated and a motor drive circuit including the inverter is surrounded by a compressor housing, characterized in that a bus bar joint section at which bus bars are electrically joined together is provided in the motor drive circuit, and a tip of at least one of the bus bars, the tip being located at the bus bar joint section, is split into small joining sections.

Abstract: An inverter-integrated electric compressor enhances vibration resistance of an inverter apparatus integrated with a housing without degrading cooling performance, reduction in weight, or the ease of assembly of the inverter apparatus. An inverter-integrated electric compressor has an inverter apparatus integrated with an inverter storage box of housing. The inverter apparatus includes a metal plate secured in an inverter storage box, a plurality of power semiconductor switching elements mounted on the metal plate, a power substrate on which a power-related control circuit for operating the power semiconductor switching elements is mounted, and a busbar assembly formed by integrating a plurality of busbars with an insulator. The metal plate includes a protrusion extending in a width direction perpendicular to a motor shaft direction of an electric motor.

Abstract: Provided is an inverter-integrated electric compressor wherein the attachability of a coil component has been improved while reliability of a connection state at the electrical joints is ensured by simplifying a mechanism which electrically connects the coil component, such as one for removing electromagnetic noise, to a motor drive circuit.

Abstract: Provided is a fuel pump module used for a car, and more particularly, to a fuel pump module with a driver equipped inside a fuel tank capable of solving a problem of space limitation due to the installation of the driver by disposing the driver for controlling a BLDC fuel pump between a flange and a reservoir and mounting it in the fuel tank, minimizing the degradation in performance of the BLDC fuel pump caused by voltage drop and efficiency degradation due to a wire by reducing a length of a wire for electrically connecting the driver with the BLDC fuel pump, and achieving a sufficient heat radiation effect by directly transferring the heat energy generated from electrical devices such as FET, MCU, or the like, mounted in the driver to the fuel in the fuel tank through the case cover.

Abstract: A power driven compressor that can prevent its control circuit from overheating includes: a housing whose interior accommodates a transmission assembly and a compressor assembly and has an air inlet and a coolant outlet; a control circuit accommodating box which is disposed on the housing and has a coolant inlet and an air outlet; a connecting pipe whose one end connects to the air outlet of the control circuit accommodating box and whose other end connects to the air inlet of the housing. When the transmission assembly is driven by electrical power, the coolant enters the control circuit accommodating box via the coolant inlet thereof. It then goes through the air outlet, the connecting pipe, and the housing air inlet into the housing for compression. The compressed coolant goes out via the coolant outlet of the housing.

Abstract: A method for controlling the motor of an air handling system to provide a desired output of flowing air therefrom while minimizing the power used by the motor, including operationally connecting a switched reluctance electric motor to a blower, operationally connecting an electronic controller to the switched reluctance electric motor, operationally connected at least one sensor to the electronic controller, measuring at least one environmental parameter with the at least one sensor, inputting the desired air flow into the electronic controller, calculating the minimum motor speed necessary to provide the desired air flow, and sending a control signal from the electronic controller to the motor to control the motor to the minimum motor speed necessary to provide the desired air flow.

Abstract: A motor direct driven compressor system includes a motor, a coupling and a compressor, and the coupling is coupled between the motor and the compressor, and a second assembling portion, a coupling portion and a metal plate of the coupling are used for connecting a driving shaft of the motor and a transmission shaft of the compressor. With this design, the driving force of the motor can be transmitted to the compressor and provided for the operation of the compressor. In addition, errors produced by the rotation and transmission during the transmission process can be minimized, so that the compressor can be operated accurately and normally.

Abstract: The invention relates to a system and method of providing a compressor mechanism having a front housing, center housing and rear housing. The center housing includes an integrated compressor bearing support and compressor base surface that divides the housing into cantilevered wall sections. The system and method constructed in this manner provides a compact structure for an electric compressor with the ability to reduce noise vibration harshness.

Abstract: A power transmission apparatus includes a drive roller and a driven roller made of magnetic material, which are rotatable about different axes, and which are provided with a gap therebetween, a case enclosing the rollers, an input shaft and an output shaft connected coaxially with the rollers through the case, respectively, and a magnetic fluid housed in the case to fill the gap. The apparatus includes an electromagnetic coil for generating magnetism, and a magnetic path of the magnetism generated by the electromagnetic coil is formed so that a magnetic field is generated from the drive roller or the driven roller toward the driven roller or the drive roller via the gap.

Abstract: An electric pump unit includes: a unit housing; a bearing unit provided within the unit housing; a rotary portion; and a motor stator fixed to the unit housing. The rotary portion includes: a pump driving motor shaft supported by the bearing unit such that an axial position of a center of gravity of the rotary portion falls within an axial range of the bearing unit, and a motor rotor. The motor rotor includes: a disc portion which extends radially outwards from an axial end portion of the motor shaft; and a cylindrical portion which extends from an outer circumferential portion of the disc portion towards the other axial end side and surrounds an outer circumference of the bearing unit.

Abstract: An electric fan is provided, including a labyrinth structure with increased performance of preventing entry of a liquid into a receiving space to receive a stator and a rotor. A clearance is defined between an opposed wall portion of a base and an opposed wall portion of an impeller body, which are opposed to each other in an axial direction of a rotary shaft, to form a labyrinth structure. The opposed wall portion of the base and the opposed wall portions of the impeller body are shaped to form a volume expanding portion within the clearance. The volume expanding portion is constituted from a groove portion for expanding the clearance, having a volume larger than other portions within the clearance.

Abstract: An air pump is employed to inject an adjustable flow of air into the column of water within an ice fishing hole to create air bubbles that naturally rise to the surface of the water as the result of air being lighter than water. The rising air bubbles create an upward flow or circulation of water within the hole, replacing colder water at the surface of the hole with warmer water from near the bottom of the hole to thereby prevent formation of ice on the surface of the column of water. The present apparatus and method may be similarly employed to maintain livestock water tanks and other contained volumes of water free of ice.

Abstract: An integrated portable power unit including a power pack and a generator mounted within a first compartment and including a second isolated air handling compartment. The air handling compartment may include a fan for moving air through ductwork, a radiator for receiving heated cooling water from the power pack and a heat exchanger connected to a compressor for generating cooled water, the compressor and the fan connected to the power pack.

Abstract: A hydraulic drive system for use in driving a power generator has a hydraulic pump having an input for rotationally driving the hydraulic pump, a flow control valve in fluid communication with the hydraulic pump, a hydraulic motor having a first output and a second output coupled to a hydraulic fluid source, and a pressure regulator positioned intermediate the flow control valve and the hydraulic motor. The pressure regulator is in fluid communication with the hydraulic motor and the flow control valve, and maintains a hydraulic pressure at its input that is higher than at its output to prevent the hydraulic system from stalling. The system further comprises a power generator having an input shaft rotationally coupled to the hydraulic motor first output.

Abstract: A hermetic compressor includes a cylindrical hole (117) forming a compression space (115) and having a tapered portion (127) so as to increase its inner diameter from the top dead center to the bottom dead center of a piston (123). The piston (123) is reversed in its inclination direction with respect to the axial center of the cylindrical hole (117) in the initial stage of the compression stroke. This reduces the contact between the piston (123) and the cylindrical hole (117) at the time of the reversal, as compared with the case in which the piston (123) is reversed in its inclination direction in the middle or later stage of the compression stroke. As a result, the hermetic compressor is reliable and has low noise level.

Abstract: A hydraulic fluid circuit for a power transmission device includes a first hydraulic circuit segment fluidly decoupled from a second hydraulic circuit segment. A hydraulic pump includes a first fluidic pumping element and a second fluidic pumping element. The first fluidic pumping element fluidly communicates with the first hydraulic circuit segment. The second fluidic pumping element fluidly communicates with the second hydraulic circuit segment. The first fluidic pumping element is controllable to a first pump operating point to achieve a preferred high fluidic flow rate in the first hydraulic circuit segment. The second fluidic pumping element is controllable to a second pump operating point to achieve a preferred high fluidic pressure in the second hydraulic circuit segment.

Abstract: An engine with an efficient selectively operable vacuum source is disclosed. In one example, an electric vacuum pump with oil wetted seals provides vacuum to a vehicle. The approach may provide for improved efficiency when generating vacuum.

Abstract: A power plug system for use with a submersible pump. One embodiment comprises a male plug end, a female plug end, and a plurality of seals. The male plug end comprises a housing and a conductive sleeve. The housing receives an electrically conductive cable and conducts an electric current from the cable to the conductive sleeve. The female plug end comprises a housing, a conductive pin, and a female plug sleeve. The conductive sleeve is radially sealable within the female plug end through a plug end seal of the plurality of seals. The conductive sleeve and the conductive pin are conductively connectable. The female plug sleeve is radially sealable within a complementary plug end through a female plug sleeve seal of the plurality of seals. The conductive pin conductively connects to a conductive lead of the complementary plug end with insertion of the female plug sleeve therein.

Abstract: A microelectromechanical (MEM) pump is disclosed which includes a porous silicon region sandwiched between an inlet chamber and an outlet chamber. The porous silicon region is formed in a silicon substrate and contains a number of pores extending between the inlet and outlet chambers, with each pore having a cross-section dimension about equal to or smaller than a mean free path of a gas being pumped. A thermal gradient is provided along the length of each pore by a heat source which can be an electrical resistance heater or an integrated circuit (IC). A channel can be formed through the silicon substrate so that inlet and outlet ports can be formed on the same side of the substrate, or so that multiple MEM pumps can be connected in series to form a multi-stage MEM pump. The MEM pump has applications for use in gas-phase MEM chemical analysis systems, and can also be used for passive cooling of ICs.

Abstract: There is proposed an embodiment of an electric fluid pump of a semi-axial design wherein support ribs (31) are arranged between a radially outer pump housing portion (32) and a first, radially inner motor housing portion (8) that radially surrounds the electric motor (1), wherein the radially outer pump housing portion (32) is formed integrally with the first motor housing portion (8) and the support ribs (31). In this manner, as compared to previously known embodiments, small wall thicknesses of the pump housing can be realized because the support ribs will offer sufficient strength. Thus, the number of component parts and the weight can be reduced.

Abstract: There is provided a hermetic compressor which has a simplified structure and can satisfactorily separate a lubricating oil from a refrigerant and efficiently discharge the refrigerant from a hermetic container. A discharge passage (90) is provided to extend through a scroll unit (30) and a primary shaft frame (14), or between an inner wall surface of a body (3) of a hermetic container (2) and the scroll unit (30) and primary shaft frame (14) to guide the refrigerant with the lubricating oil directly to a stator (8) of an electric motor (6). Over the stator (96), an oil separation plate (96) is provided to separate the lubricating oil from the refrigerant conveyed through the discharge passage (96). A discharge pipe (72) is fitted to the body, below the primary shaft frame, to allow the refrigerant with the lubricating oil removed to be discharged from the hermetic container.