A liquid metal jet X-ray source including an electromagnetic pump for pumping the liquid metal. The electromagnetic pump includes a core having a core diameter and an outer yoke with a thickness of at least 20% of the core diameter. Preferably, the thickness of the outer yoke is at least 20% of the core diameter plus 6% of a radial distance between an outside of the core and an inside of the yoke.

A solenoid operated unit (100) for detecting and removing an undesired fluid (6) from a desired fluid (5) with diagnostic metering, comprises a unified solenoid operated pump and valve unit (70), a drainage path (40), an electrical detection system (60), a mecha-electro-magnetic detection system (80) and a junction box (190) interacting with an electronic control unit (90) comprising a PWM generator. A plunger (50) moves from up to down, a sweeping volume (28) with a cycle of a PWM electricity wave, while moving down the plunger (50) creates a negative pressure in a sweeping volume (28) and while moving up a positive pressure gets created in the sweeping volume (28) and a negative pressure gets created at a rear end (30) of a unified chamber (26), an air reliever (180) is provided for breathing.

A drive system for a pump includes a housing, first and second fluid displacement members, a solenoid disposed within the housing, and a reciprocating member configured to be driven by the solenoid. The reciprocating member is connected to the first and second fluid displacement members and is configured to mechanically displace the first and second fluid displacement members.

A fluid flow meter comprising a fluid pump to displace fluid with pumping strokes of one or more pumping stroke types wherein each of the one or more stroke types displaces a known volume of fluid, a sensor functionally associated with a fluid reservoir and adapted to generate a signal indicative of a fluid pumping condition within the fluid reservoir, which fluid reservoir is integral or functionally associated with the pump, and circuitry to trigger one or a sequence of strokes of the pump in response to a signal from the sensor.

Systems and methods for operating a linear motor (e.g., for an ESP), where the motor's mover moves in a reciprocating motion within a bore of the stator. Hard stops are located at the ends of the bore. The motor has a first set of sensors in the stator positioned proximate to the bore. When the mover moves in the bore, the sensors produce corresponding output signals, except when the mover is in a position near, but not in contact with a hard stop. While the sensors produce output signals, the motor is driven in a first direction toward the hard stop. When the sensors stop producing the output signals, the mover has reached the first position, and the motor is controlled to reverse the direction of the mover.

A fluid pump has a housing, a chamber having an inlet and an outlet, an inlet valve, an outlet valve, and a plunger. The plunger has a plunger tube extending into the chamber and supported for movement, on a suction stroke, to introduce a fluid into the chamber via the inlet, and, on a discharge stroke, to displace the fluid from the chamber via the outlet. An electromagnetic driving unit moves the plunger in two opposite directions. A magnetic core is located adjacent the plunger for establishing a magnetic path across the electromagnetic driving unit and the plunger. The core is located in the path of movement of the plunger on the suction stroke, and is protected or covered by a material against contact with the fluid in the housing.

An apparatus for pumping a fluid from a fluid inlet to a fluid outlet is disclosed. The apparatus comprises: a spool axially movable within a cavity, wherein a first chamber is located at a first axial end of the cavity and a second chamber is located at a second axial end of the cavity, wherein the volume of the first chamber and the second chamber varies depending upon the axial position of the spool within the cavity; a valve movable between a first position and a second position, wherein in the first position the valve is configured to convey fluid from the fluid inlet to the first chamber and from the second chamber to the fluid outlet, and in the second position the valve is configured to convey fluid from the fluid inlet to the second chamber and from the first chamber to the fluid outlet.

A drive system for a pump includes a housing defining an internal pressure chamber, a working fluid disposed within and charging the internal pressure chamber, and a reciprocating member disposed within the internal pressure chamber. The reciprocating member has a pull chamber. A pull is secured within the pull chamber, and a fluid displacement member is coupled to the pull.

A method of controlling a Free Piston Mover, the method comprising the steps of: generating a Control Parameter Set for closed loop control of a Target Control Variable, this set comprising a Target Control Variable Function together with one or more of: a Stroke Threshold Function; a Feed Forward Current Function; a Feedback Terms Function; Control Parameter Set Transition Conditions; transmitting the Control Parameter Set to an In-Stroke Controller in advance of the start of a Stroke to be controlled; modifying one or more of the constituents of the Control Parameter Set for any Future Stroke of the Free Piston Mover using a Future-Stroke Controller; and transmitting the modified Control Parameter Set to the In-Stroke Controller for the control of any Future Stroke.

A magnet pump for an auxiliary unit of a vehicle includes an inlet, an outlet, an electromagnet comprising an armature, a core, a coil and a yoke, a cylinder comprising an outlet opening, and an axial piston which moves in the cylinder. The axial piston includes first and second axial piston parts, a gap arranged between the first and second axial piston parts, and an axial through bore. A first non-return valve is biased between the first and second axial piston parts and against the axial piston. A second non-return valve is biased against the outlet opening of the cylinder. The first axial piston part is connected with/is integrally formed with the armature and is lifted off the second axial piston part. A fluidic connection exists between the inlet and the outlet via the gap when the first axial piston part is lifted off the second axial piston part.