Abstract: Heat transfer devices are based on using one or more ionic pumps to circulate a dielectric working fluid around a closed circulation path, which may be contained in a conduit. The working fluid may be a liquid or a gas. The ionic pumps are disposed along the closed circulation path. The pumps include an emitter and collector. When a voltage is applied to the emitter, the working fluid is ionized at the emitter. The ionized fluid is drawn electrostatically to the lower-voltage collector, which, through collision with molecules that in turn impart their momentum, creates a flow of the working fluid. This approach may be used with either positive or negative corona devices.

Abstract: Disclosed are a scroll compression mechanism and a scroll compressor. The scroll compression mechanism comprises a non-orbiting scroll member, an orbiting scroll member, an oil supply passage, an adjusting valve and a fluid pressure passage comprising a first end and a second end. The first end is in fluid communication with a first pressure source to apply a first pressure to the movable valve body, the second end is in fluid communication with a second pressure source to apply a second pressure to the movable valve body, so that based on a pressure difference between the first and second pressures the movable valve body can selectively move toward a first direction of reducing a flow cross-sectional area of the oil supply passage and toward a second direction of increasing the flow cross-sectional area of the oil supply passage, thereby adjusting an oil supply amount to the scroll compression mechanism.

Abstract: A precise dose syringe for medical botulinum toxin is provided, which includes a syringe and a plunger handle. Multiple arc-shaped grooves are respectively provided on both sides of the plunger handle, and a scale line is processed on the front side of the plunger handle. A reminder mechanism and a quantitative mechanism are sleeved on the outer side of the plunger handle. The indicator arrow is located in front of the plunger handle, and the I-shaped block is connected to a thumb screw. The front side of the thumb screw is fixedly connected to a contact block, and the front side of the contact block is in contact with a back side of the plunger handle. The quantitative mechanism can make the injection dose of the syringe precise and controllable, while the reminder mechanism can remind doctors of the real-time injection amount during botulinum toxin injection.

Abstract: The system includes a pump assembly comprising a pump mechanism having an inlet side that fluidly couples to a fluid supply, and an outlet side. A pressure sensor is coupled to the outlet side and configured to measure fluid pressure. An actuator is coupled to the pump mechanism. A controller is coupled to the pressure sensor and is configured with a preselected set of fluid pressure set points and one or more preselected sets of fluid flow rates and to control the actuator to increase a fluid flow rate to a first flow rate when the fluid pressure at the outlet side falls to a lower one of corresponding fluid pressure set point. The controller controls the actuator to reduce the fluid flow rate to a second fluid flow rate, when the fluid pressure at the outlet side rises to an upper one of a corresponding fluid pressure set point.

Abstract: The present invention relates to a linear motor and a linear compressor. A linear motor according to an idea of the present invention comprises: a first stator; a second stator disposed inside the first stator so as to be movable in an axial direction. The mover includes: a plurality of permanent magnets; a front sub core disposed at the front of the plurality of permanent magnets in the axial direction; and a rear sub core spaced from the front sub core in the axial direction so as to be disposed at the rear of the plurality of permanent magnets in the axial direction, wherein the front sub core and the rear sub core are formed to have the same shape.

Abstract: Discharge port (26) as arc-recessed discharge portion is formed by cutting on bottom surface (13a) of pump accommodating portion (13) of variable displacement pump. On mounting surface (1b) of housing body (1), first low pressure chamber (281) is formed at position overlapping with discharge port (26) in radial direction of pump structure (14) formed by driving shaft (3), rotor (4) and vanes (5) Drain hole (28b) communicating with low pressure portion located outside housing body (1) is formed on bottom surface (28a) of first low pressure chamber (281) along direction of rotation axis (O1) of pump structure (14). Low pressure portion has pressure that is hydraulic pressure of oil discharged from discharge port (26) or less. Oil from discharge port (26), having higher pressure than first low pressure chamber (281), flows into first low pressure chamber (281) by pressure difference between discharge port (26) and first low pressure chamber (281).

Abstract: A motor includes: a first portion that includes a plurality of permanent magnets; and a second portion that includes a plurality of coils, wherein the first portion or the second portion is configured to be rotatable around a rotation axis, wherein the plurality of permanent magnets are circumferentially arranged about the rotation axis, and wherein the plurality of coils are arranged so as to face the plurality of permanent magnets in a direction along the rotation axis, and the motor further includes: a control unit that controls a rotational speed and an attitude of the rotating first portion or the rotating second portion by controlling currents that are applied to the plurality of coils.

Abstract: A hydraulically driven membrane pump for conveying a fluid, including a pumping chamber, a working chamber and a membrane which separates the pumping chamber and the working chamber in a fluid-tight manner, and means for reciprocating the membrane between a suction stroke position and a pressure stroke position, wherein the pumping chamber comprises at least one suction port through which the fluid to be conveyed is sucked into the pumping chamber in the suction stroke, and at least one discharge port through which the fluid to be conveyed is discharged from the pumping chamber in the pressure stroke, the membrane being connected on the working chamber side to a pull rod which is resiliently biased in the direction of the movement of the suction stroke.

Abstract: A metering diaphragm pump includes a metering chamber, a working chamber and a metering membrane. The metering chamber and the working chamber are separated from one another by the metering membrane. A device for moving the metering membrane back and forth between a first and a second position is provided. The volume of the metering chamber is smaller in a first position than in the second position, and a protective membrane is disposed next to the metering membrane on the working chamber side.

Abstract: A wearable infusion pump assembly includes a reservoir for receiving an infusible fluid, and an external infusion set configured to deliver the infusible fluid to a user. A fluid delivery system is configured to deliver the infusible fluid from the reservoir to the external infusion set. The fluid delivery system includes a volume sensor assembly, and a pump assembly for extracting a quantity of infusible fluid from the reservoir and providing the quantity of infusible fluid to the volume sensor assembly. The volume sensor assembly is configured to determine the volume of at least a portion of the quantity of fluid. The fluid delivery system further includes a first valve assembly configured to selectively isolate the pump assembly from the reservoir, and a second valve assembly configured to selectively isolate the volume sensor assembly from the external infusion set.

Abstract: A catheter positioning system has an inner needle assembly, an outer needle assembly and a catheter assembly. The inner needle assembly has an inner needle, a stopper connected the inner needle, and a tube connected to the stopper. The outer needle assembly has an outer needle connected to a chamber. The outer needle is arranged concentrically with the inner needle so as to surround the inner needle. The catheter assembly has an internal catheter and an access hub. The catheter is arranged concentrically over the outer needle. The catheter is placed in a vein by piercing the vein with the inner needle, infusing liquid through the tube and inner needle to inflate the vein, sliding the outer needle into the vein over the inner needle, sliding the catheter into the vein over the outer needle, and then removing the first and second needles together, leaving the catheter in the vein.

Abstract: A breast pump includes a milk bottle, a silica gel bowl, a silica gel flange and a main machine; the silica gel bowl is mounted inside the milk bottle, the side wall of the silica gel bowl is provided with an one-way valve, the silica gel bowl is provided with a milk collecting cavity and a negative pressure cavity, separated by a deformed wall of the silica gel bowl; the peripheral portion of the silica gel flange is tightly connected with the milk bottle, the central portion of the silica gel flange is tightly connected with the silica gel bowl and provided with a through hole communicated with the milk collecting cavity, and the inner wall of the milk bottle and the inner wall of the silica gel flange enclose to form the milk storage cavity; the main machine is arranged on the outside of the milk bottle.

Abstract: A circulation system is provided to move a coolant liquid in a coolant chamber (44) formed between a housing (40) and a motor shroud (42) of a pump (10) for a fluid being worked upon. The circulation system has a coolant impeller (54) in a coolant impeller chamber (56). The coolant impeller is driven by a drive shaft (20) that also drives a primary impeller (24) that moves the fluid being worked on. The coolant impeller is positioned along the drive shaft between the motor and the primary impeller. The coolant impeller has a wide inner portion (74) and a peripheral base disk (76) that define a radially-offset suction eye (72) and support a plurality of impeller blades (70). A seal spring (86) compressively acts on the inner portion, providing a mechanical seal.

Abstract: Pressure booster (1) for boosting the pressure of petroleum fluids, produced water or seawater, comprising a pressure booster (2) with a motor (3), a rotatable motor shaft (4) and a rotatable pump or compressor shaft (5) where the pressure booster in the form of a centrifugal pump (2) or compressor is arranged.

Abstract: A medical pump includes a cuboid pump housing and a front lid that is pivotably hinged to the pump housing. The front lid includes a display, in particular a touch display, and/or operating elements. The front lid is attached to the pump housing with at least one first hinge element and at least one second hinge element. The at least one first hinge element and/or the at least one second hinge element includes or forms at least one electrical connection between the pump housing and the front lid for electrical linking and exchange of data.

Abstract: A hydraulic device having: a plurality of main piston-cylinder arrangements, each of the respective pistons having a fixed stroke length and configured for axial reciprocation within their respective cylinder; a plurality of flow control valves for switching between a lockdown state and an unlocked state of one or more of the plurality of main piston cylinder arrangements during operation of the hydraulic device; and one or more control valves for directing the plurality of flow control valves between their respective unlock and lock positions.

Abstract: A control device that includes an electric detection unit which detects an electric physical quantity relating to a head capacitor provided between a DC power supply and an inverter switching element; and a protection control unit which controls the inverter switching element in accordance with a change in the electric physical quantity so that no electric current flows to the head capacitor.

Abstract: A fluid moving apparatus includes an electric motor having a rotor and a stator and a fluid displacement member. The rotor rotates relative to the stator on a common axis to generate a rotational output. The rotational output is provided to the fluid displacement member to power the fluid displacement member to one of move linearly along and rotate about the common axis. The stator includes one or more coils configured to power rotation of the rotor. The one or more coils extend circumferentially around and can be coaxial on the common axis.

Abstract: A method of dispensing a therapeutic fluid from a line includes providing an inlet line connectable to an upstream fluid source. The inlet line is in downstream fluid communication with a pumping chamber. The pumping chamber has a pump outlet. The method also includes actuating a force application assembly so as to restrict retrograde flow of fluid through the inlet while pressurizing the pumping chamber to urge flow through the pump outlet. A corresponding system employs the method.

Abstract: The application relates to a compressed air station comprising at least two compressed air components that yield waste heat, wherein each compressed air component is designed either as a compressor, in particular as a screw compressor, or as a refrigeration dryer, wherein at least one of the compressed air components, namely a refrigeration dryer (12), is connected to the exhaust air duct (13), and wherein a further compressed air component is connected to the same exhaust air duct (13), wherein a compressed air refrigeration heat exchanger (23) is provided within the refrigeration dryer (12), in which the compressed air is cooled by way of a refrigerant conducted in a refrigerant circuit (24), wherein the refrigerant circuit (24) comprises a refrigerant compressor (25), a condenser (26), an expansion valve (27) and the compressed air refrigeration heat exchanger (23), wherein the compressed air station further comprises a dryer exhaust air duct (15), which is provided for discharging a cooling air flow that