Abstract: A fan array is provided having a frame including a plurality of frame members. The frame members are joined to define a plurality of chambers. Each of a plurality of fan units is configured to be positioned in one of the plurality of chambers. Each fan unit has a motor. A plurality of local motor controllers are joined to corresponding motors. The local motor controllers are configured to control an operation of the corresponding fan unit. A master controller is configured to communicate with the local motor controllers. The master controller is configured to provide the local motor controllers with target operating parameters for the corresponding fan units.

Abstract: A milk pump device, comprising a passage duct, a first one-way valve, a second one-way valve and a membrane pump. The first and second one-way valves are included in the passage duct and oriented in the same direction relative to each other. The membrane pump is positioned between the first one-way valve and the second one-way valve. The membrane pump forms a first milk meter for generating a first milk measurement with respect to a number of complete pumping strokes of the membrane pump. The milk pump device further comprises a second milk meter for carrying out a second milk measurement with respect to a residual pumping stroke.

Abstract: A axial flow fan includes an impeller having a plurality of blades, a motor arranged to rotate the impeller, and a casing accommodating the impeller and the motor. The casing includes a cylindrical housing, a motor base configured to hold the motor, and a plurality of spokes connecting the housing with the motor base. The plurality of spokes include a spoke having a straight shape and a spoke having a curved shape that is convex toward a rotational direction of the impeller. The axial flow fan further includes a lead wire for supplying electric power to the motor. When a radial length of the spoke having the straight shape is defined as L and an amount of the curvature of the spoke having the curved shape is defined as X, a displacement of the curved shape (X/L) is less than 0.2.

Abstract: A lubrication system includes a lubrication tank, a gearbox driven pump, an electrically driven pump located in parallel with the gearbox driven pump, and a first control valve for selectively connecting the electrically driven pump or the gearbox driven pump with the lubrication tank.

Abstract: A pump unit has an inlet valve, an outlet valve, a supply line for supplying fuel, a pumping chamber, and a plunger for pressurizing fuel in the pumping chamber. The inlet valve includes an inlet valve member movable between a first position and a second position. The inlet valve member has an aperture formed therein. The aperture provides a first fluid pathway between the pumping chamber and the supply line when the inlet valve member is in its first position, and the aperture provides a second fluid pathway between the pumping chamber and the outlet valve when the inlet valve member is in its second position.

Abstract: A control system for a rod pumping unit is disclosed herein. The control system includes a memory device, a sensor, and a processor. The memory device is configured to store a velocity profile for controlling a sucker rod string of the rod pumping unit. The sensor is configured to take measurements for determining surface load of the sucker rod string. The processor is configured to gain access to the memory device and the velocity profile. The processor is further configured to determine a reference force. The processor is further configured to receive a measurement from the sensor and determine the surface load. The processor is further configured to compute a desired velocity for commanding the rod pumping unit. The desired velocity is computed based on a reference velocity from the velocity profile, the reference force, and the surface load.

Abstract: An automotive fuel pump having a body with an inlet, an outlet, and an elongated chamber therebetween. A relief valve, relief valve housing, and check valve are respectively disposed in the chamber between the inlet and the outlet. The relief valve housing has a portion which extends across the chamber so that a first axial end of the relief valve housing forms a valve seat for the check valve while the other axial end forms a valve seat for the relief valve. The check valve permits fluid flow from the body chamber to the outlet while the relief valve exhausts excess fluid pressure at the outlet back into the body chamber.

Abstract: Upper and lower pressure equalizers couple to a lower end of a motor of an electrical submersible pump assembly. An intermediate connection having a liquid flow passage connects the pressure equalizers. A connection valve located in the liquid flow passage closes the liquid flow passage prior to connecting the pressure equalizers with each other, and opens the liquid flow passage after the connection between the pressure equalizers is made. A sensor lower equalizer wire extends from a sensor unit through the lower pressure equalizer to a lower electrical terminal at the upper end of the lower pressure equalizer. A sensor upper equalizer wire connects to the lower electrical terminal and extends through the upper pressure equalizer to an upper electrical terminal at the upper end of the upper pressure equalizer. A sensor motor wire extends downward from the motor into engagement with the upper electrical terminal.

Abstract: A liquid supply mechanism includes a lower cover, an upper cover, a plunger, at least one resilient member and at least one damping member. The lower cover has a liquid outlet and the upper cover is connected to the lower cover. A chamber is formed between the lower cover and the upper cover. The chamber communicates with the liquid outlet and contains a cooling liquid. The upper cover has an axial hole. The plunger is movably disposed in the chamber. The plunger has an axial rod and the axial rod is inserted into the axial hole. The resilient member is disposed in the chamber. Opposite ends of the resilient member abut against the upper cover and the plunger. The damping member is disposed on the axial rod and abuts against an inner wall of the axial hole.

Abstract: A tube pump comprises a rotor configured to have a roller and to hold the roller to be able to make an orbital motion along the inner circumferential surface of the cap. The rotor includes a disk part which holds the roller on a base side, and a tube press member that engages with the disk part so that the tube does not move to the base side with respect to the disk part, seals a gap formed with respect to the inner circumferential surface of the cap, and is capable of rotating along an outer circumferential part of the disk part is provided at the outer circumferential part of the disk part.

Abstract: Disclosed is a high-efficiency double-intake air pump, comprising a motor, a connector, a housing and a power assembly, and a lower horseshoe-shaped diaphragm, a lower case of a piston chamber, an upper case of a piston chamber, an upper horseshoe-shaped diaphragm, a disk-shaped air nozzle and an air nozzle protection disk, which are provided in the front end of the housing and are connected in series successively and cooperatively in an axial direction, wherein the front end of the motor is arranged in the rear end of the housing via the connector, the air nozzle protection disk is fixedly connected to the end face of the housing, and the power assembly comprises wave-shaped cam and couples of double-ended pistons. The air pump has an artful and compact design structure, high operation efficiency, and a low noise.

Abstract: In a compressor of the present invention, an intermediate pressure port through which a first discharge chamber and a motor chamber communicate with each other is formed in a front housing. A refrigerant having an intermediate pressure is discharged to the first discharge chamber. Consequently, it is possible to guide the refrigerant having the intermediate pressure in the first discharge chamber to the motor chamber, and cool an electric motor, which generates heat during actuation, with the refrigerant having the intermediate pressure. In the compressor, a first impeller and a second impeller are disposed such that large diameter portions of the first impeller and the second impeller face each other. The second impeller is smaller in diameter than the first impeller.

Abstract: A reciprocation pump has a supply liquid-side sub-pumping chamber arranged adjacent to the supply liquid-side pumping chamber at an external side. A waste liquid-side sub-pumping chamber is arranged adjacent to the waste liquid-side pumping chamber at an external side. A rod extends through the supply liquid-side sub-pumping chamber, the supply liquid-side pumping chamber, the waste liquid-side pumping chamber and the waste liquid-side sub-pumping chamber. The rod is connected to the reciprocation mechanism and the driving source to transmit a driving force of the driving source to the reciprocation mechanism. Sealing members are arranged, respectively, in walls through which the rod extends to partition the supply liquid-side pumping chamber and the supply liquid-side sub-pumping chamber as well as the waste liquid-side pumping chamber and the waste liquid-side sub-pumping chamber.

Abstract: Embodiments of the invention provide battery backup sump pump (BBU) systems and methods. The BBU systems and methods can be used with a battery and an alternating current power source to charge the battery. The BBU systems and methods can be adapted to be a portable power source for AC and DC external devices.

Abstract: This centrifugal blood pump apparatus includes an impeller (10) provided in a blood chamber (7), and a plurality of coils (20) provided in a motor chamber (8) for driving the impeller (10) to rotate with a dividing wall (6) interposed therebetween. A flexible substrate (23) in the shape of a strip is arranged to surround outer circumferences of the plurality of coils (20), and is connected to the plurality of coils (20) and a connector (24). A driving voltage (VU, VV, VW) is externally supplied to the plurality of coils (20) via the connector (24) and the flexible substrate (23). Thus, assembling workability, productivity and reliability are improved.

Abstract: A method is provided for actively compensating for pressure changes of a working fluid within a conduit. A first cavity is provided in fluid communication with the conduit. A second cavity is in fluid communication with a control fluid. A plunger is in communication with both the first cavity and the second cavity and is movable in response to pressure changes of the working fluid in the conduit. The plunger is re-centered. Re-centering the plunger includes the following steps. Position data representative of movement of the plunger is collected. The position data is analyzed with a control unit to determine an average position of the plunger which is offset relative to a center position. The average position of the plunger is compared, with a control unit, to the center position. A signal is relayed from the control unit to a control valve to urge the plunger toward the center position.

Abstract: A variable-displacement lubricant pump includes a first plunger. A control ring is pushed by the first plunger in a high pumping volume direction. The first plunger is arranged in a first control chamber with a side wall. A first pressure conduit connects a pump outlet port with the first control chamber. A pumping volume limitation unit is arranged so that the first plunger covers and closes an outlet opening arranged in the side wall in a lower pumping volume position of the control ring. A thermostatic element actuates a temperature controlled valve based on lubricant temperature. The thermostatic element pushes a shiftable valve body against a retraction spring to an extended closed end position when the lubricant has an operation temperature. The shiftable valve body is in a retracted closed end position at a cold lubricant temperature and in an intermediate open position at an intermediate lubricant temperature.

Abstract: A pump has an inlet opening, an outlet opening, a pump diaphragm comprising an opening, provided with a passive check valve, through the pump diaphragm, and an actuator configured to move the pump diaphragm between a first position and a second position. The passive check valve is configured such that a movement from the first position in the direction toward the second position has a closing effect, and that a movement from the second position in the direction toward the first position has an opening effect, so that a pumping cycle wherein the pump diaphragm is moved from the first to the second positions, and back, causes a net flow from the inlet opening to the outlet opening.

Abstract: A pneumatic evacuation pump includes an inlet assembly having an inlet valve, a charging port, and purge air injection means. A chamber includes a charge end opening to the charging port, and a discharge end. A delivery assembly includes a passage between the discharge end and a delivery outlet, a delivery valve interposed in the passage between the discharge end and the delivery outlet, and a venturi vacuum source opening to the passage between a discharge valve and the discharge end. Exhaust air injection means located downstream of the discharge valve utilizes exhaust air from the venturi vacuum source. A compressed air supply supplies the venturi vacuum source and the purge air injection means. Control means acts to coordinate a cycle of operation of the venturi vacuum source, the purge air injection means, the exhaust air injection means and the inlet and delivery valves.

Abstract: A tube pump comprises a rotor configured to have a roller and to hold the roller to be able to make an orbital motion along the inner circumferential surface of the cap. The rotor includes a disk part which holds the roller on a base side, and a tube press member that engages with the disk part so that the tube does not move to the base side with respect to the disk part, seals a gap formed with respect to the inner circumferential surface of the cap, and is capable of rotating along an outer circumferential part of the disk part is provided at the outer circumferential part of the disk part.