Abstract: A centrifugal pump includes a pump unit and a drive unit. The pump unit includes a volute and an impeller disposed in the volute. The drive unit includes a stator and a rotor having a shaft. The volute includes an inlet, an outlet and a chamber in communication with the inlet and outlet. The shaft of the rotor extends into the chamber of the volute and the impeller is attached to and driven by the shaft. The volute further includes a transition part connected between the outlet and the chamber and communicating the outlet with the chamber. The axis of the transition part is angled to the axis of the outlet. The transition part is configured to improve the effect of fluid turbulence to thereby reduce noise, especially in the air-water stage.

Abstract: This invention relates to a pump system, especially for boosting the flow rate of a fluid through a pipe (1, 2, 6), comprising a pump positioned in a pump chamber (10) for pumping at a chosen rate, and a motor driving said pump, the motor being positioned in a chamber (9) being provided with a pressurized fluid, the pressure of which being higher than the pressure in the pump chamber, the motor and the pump chambers being separated by a seal (8), the seal allowing a leakage of said pressurized fluid between them, wherein the pressurized fluid is acceptable to the pump environment and the system comprises a discharge branch line (3) coupled to the pipe(6) and positioned downstream from said pump, the discharge branch line having an outlet into the environment.

Abstract: A linear compressor includes a fixed member provided with a compression space, a movable member which linearly reciprocates inside the fixed member to compress refrigerant, one or more springs installed to elastically support the movable member in a motion direction, a first stator applied with a current to produce a magnetic field, a second stator spaced apart from the first stator at a certain interval, a conductor member electromagnetically induced by the magnetic field produced by the first stator and the second stator to make the movable member linearly reciprocate, and a control unit which controls supply of the current with respect to the first stator.

Abstract: A pump system including a pump and a sensor system for monitoring a fluid production of the pump and providing an output indicative of the fluid production. The sensor system is configured to use at least two discreet methodologies for measuring the fluid production. The pump system further includes a control system operatively coupled to the sensor system and the pump and configured to automatically vary the speed of the pump at least partially based upon the output of the sensor system.

Abstract: A variable displacement compressor comprises an opening-degree adjustment valve which is disposed in a flow passage between a suction port and a suction hole communicating with a cylinder bore and variably controls the opening area of the flow passage. The variable displacement compressor is characterized in that the resistance against the movement of the valve body of the opening-degree adjustment valve in the direction of increasing the opening area of the flow passage is made to be greater than the resistance against the movement thereof in the direction of decreasing the opening area. The liquid compression at the starting of the compressor is prevented from occurring, whereby the durability and the reliability of the device can be improved and the device can exhibit excellent displacement control responsiveness.

Abstract: The invention relates to a one-piece plastic element having an inlet valve cover and an inlet valve seat element for an inlet valve of a piston pump of a hydraulic brake system of a motor vehicle. The inlet valve is designed as a check valve, and the inlet valve cover and the inlet valve seat element are connected to each other by a designed fracture point. The invention further relates to a piston pump having an inlet valve cover and inlet valve seat element made of a one-piece plastic element. The invention further relates to a method for assembling the inlet valve designed as a check valve.

Abstract: It is an object of the present invention to provide an ion pump system etc. having a high air-exhausting capacity and vacuum-maintaining capacity and capable of adjusting drive modes suitable for the uses thereof. The subject problem is solved by an ion pump system (7) comprising a casing (1), a first electrode group (2a,2b) provided in the casing (1), a second electrode group (3a,3b) provided on the outer periphery of the first electrode group (2a,2b), and outer magnets (4) for providing a magnetic field in the casing, wherein the first electrode group (2a,2b) and the second electrode group (3a,3b) are constituted as a plurality of layers alternately disposed around the center axis (11) of the casing (1).

Abstract: A hydraulic actuator unit includes a first electric motor assembly formed by mounting one of a pair of electric motors to one of a pair of electric motor covers, wherein the first electric motor assembly is detachably mounted to a pump case so as to rotate a first control shaft around its axis line, and a second electric motor assembly formed by mounting the other one of the pair of electric motors to the other one of the pair of electric motor covers, wherein the second electric motor assembly is detachably mounted to the pump case so as to rotate a second control shaft around its axis line.

Abstract: A downhole pump is operated by a non-electric motor preferably a steam turbine. In a steam assisted gravity drain system the producing well is U-shaped. A steam supply line runs into the turbine that drives the pump after the steam supply passes through a packer. The steam exhaust runs through a shroud until the U-shaped well turns back to go up to the surface. Pump suction is thus separated from steam discharge to reduce mixing as the path of least resistance for the discharged steam when it exits the shroud is up to the surface. The exhaust steam keeps the produced fluids warm and flowing. An injector well runs parallel and slightly above the horizontal portion of the U-shaped producing well.

Abstract: The present invention discloses a method and auto-control system on improving pumping system performance. The system contains a pump, a pool, pipelines, a parameter setting module, a water level measuring module and a system control module. The parameter setting module is configured to preset a characteristic parameter and a control parameter of the pump and the pipelines. The water level measuring module is configured to measure, determine and compute a high level pool water level, a flow demand trend and a system instantaneous flow at regular intervals. The system control module is configured to receive the data sent by the water level measuring module that is measured and computed, and controls the operation of the system based on the data. Compared to existing pumping control system, the system in the present invention can save energy for 10%-30%.

Abstract: A compressor includes at least one current sensor and processing circuitry in communication with the at least one current sensor. The processing circuitry declares a locked rotor condition when current drawn by the compressor is at least forty percent of peak locked rotor current.

Abstract: A double-diaphragm pump includes a pair of axially spaced apart pumping chambers, each chamber having a pumping diaphragm which divides each chamber into an inner and outer compartment. Inner ends of both pumping chambers are closed by a central element, and fluid is supplied to the outer compartments to cause the diaphragms to oscillate and vary the capacities of the inner compartments. I Each of the inner compartments having an inlet and an outlet port leading to unidirectional valves to allow fluid to be drawn into one of the compartments when the appropriate diaphragm moves outwardly and expelled from that compartment when the diaphragm moves inwardly. The unidirectional valves are located in inlet and outlet manifolds in the central element and are accessed and fitted through the inlet and outlet ports in the inner compartments.

Abstract: A valve body for pumps has a compressed air-filled chamber in the center thereof and a compressed air supply port through which compressed air is supplied into the compressed air-filled chamber. The outer surface of the valve body is provided with an annular groove-shaped air supply chamber that communicates between the compressed air-filled chamber and a pump-side air chamber. Compressed air supplied into the compressed air-filled chamber through the compressed air supply port is supplied into the pump-side air chamber through the air supply chamber.

Abstract: A cooling fan (1) includes a fan housing (10), a stator (20), a rotor (30) and a bearing assembly (40). A tube (111) extends upwardly from a central portion of the fan housing. The stator is mounted around the tube. The bearing assembly includes a ball bearing (333) and a sleeve bearing (335) received in two ends of the tube, respectively. The rotor has a shaft (336) extending into and rotatably supported by the bearing assembly. An elastic element (332) is arranged on the ball bearing to provide a pressing force on the ball bearing toward the sleeve bearing. An oil retaining element (339) is arranged around a bottom end of the shaft and spaced from the shaft. The oil retaining element is attached to the sleeve bearing to provide oil for the sleeve bearing.

Abstract: The invention concerns an improved peristaltic pump including at least one elastically flattenable tube and at least two assemblies of two pressing elements placed opposite each other, each of said assemblies being configured to compress the tube at a different point from the pump. These two pressing elements of a single assembly are placed on either side of the tube, at least one of the pressing elements of this single assembly is mobile such that the distance separating the pressing elements of the single assembly is adjustable, to allow the pressing members to be placed in a rest position, in which the tube is not compressed by the pressing elements, or to allow the pressing elements to be placed in a position compressing the tube. Advantageously, the adjustment is made automatically when the peristaltic pump or pumping is started or stopped.

Abstract: A mechanism for reducing pressure pulsation includes a pair of metal dampers formed by joining two disk-shaped metal diaphragms over an entire circumference and forming a hermetically sealed space inside a joined portion, with gas being sealed in the aforementioned hermetically sealed space of the damper, has a pair of pressing members which give pressing forces to both outer surfaces of the aforementioned metal dampers at a position at an inner diameter side from the joined portion, and is unitized with the pair of pressing members being connected in a state in which they sandwich the metal damper.

Abstract: An infusion pump uses an improved shuttle mechanism to more reliably pump liquids in low volumes for medical and other purposes. The improved shuttle uses linear translation and wider, symmetric jaws to grasp infusate tubing and pump liquid infusate through the tubing. Adjustment of the linear motion allows a user to also adjust a pumping volume of the infusion pump. Other shuttles with wider jaws may also pump infusate using a rotary motion. In addition, more than one shuttle, such as two or three shuttles, may be used to approximate continuous pumping. A series of several smaller linear shuttles with sequential actuation may be used as a linear peristaltic pump for general peristaltic pump applications.

Abstract: A pump arrangement includes a pump having a pump inlet and a pump outlet, and a safety valve arranged between the pump outlet and an outlet of the pump arrangement and having a valve seat and a valve lid. The valve seat, the pump outlet and the pump inlet are patterned in a first surface of a first integrated part of the pump arrangement, whereas the valve lid is formed in a second integrated part of the pump arrangement. An inlet of the pump arrangement and a fluid region fluidically connected thereto are formed in a third part of the pump arrangement. The second integrated part is arranged between the first integrated part and the third part of the pump arrangement such that a pressure in the fluid region has a closing effect on the safety valve, the pump inlet and the inlet of the pump arrangement being connected fluidically.

Abstract: In a constant rate discharge pump, a rotary drive source is disposed on an end of a housing, and on the other end of the housing, a pump head is provided, having a pump chamber into which a fluid is drawn, and a filling chamber filled with an indirect medium. Further, a displacement mechanism having a displacement nut which is displaced under a driving action of the rotary drive source is disposed in the interior of the housing. A bellows is interposed between a tubular body connected to the displacement nut and a first block of the pump head, wherein the interior of the bellows also is filled with the indirect medium, which is made up from an incompressible fluid. Furthermore, a flexible diaphragm is disposed in the pump head between the fluid and the indirect medium.

Abstract: An air logic controller for increasing the efficiency of an air operated double diaphragm pump. The air logic controller may increase the efficiency of the pump by controlling the supply of compressed fluid to the pump. In one embodiment, the air logic controller may control the supply of compressed fluid to the pump by replacing the continuous, large volume supply of compressed fluid supplied to conventional air operated pumps during a single pumping stroke with a varied supply of compressed fluid. The varied supply of compressed fluid may comprise a supply of compressed fluid that alternates between a large volume supply and a small volume supply of compressed fluid. The air logic controller may vary the supply of compressed fluid to the pump based at least partially on the position of a main air valve spool and the setting on an adjustable pneumatic time delay relay.