Abstract: A method of controlling the production efficiency of a well includes determining one or more parameters of a pump model for a pump of the well, determining an inflow rate of liquid into the well, and adjusting a pumping speed of the pump based on the one or more parameters of the pump model to maintain a outflow rate of liquid from the well at a desired fraction of the inflow rate.

Abstract: A thin fan with an axial airgap includes a base having a bottom plate, a circuit unit, a stator set, and a rotor set. The stator set includes at least one winding part, plural induced magnets connected to the winding part, and at least one winding set wound on the winding part. The rotor set includes a hub, plural blades disposed around the hub, and a permanent magnet disposed around a bottom side of the hub and above the induced magnets. The winding set is outside of the permanent magnet. A pivot shaft is between the hub and the bottom plate and includes a bearing sleeve and a rotating shaft inserted in the bearing sleeve. The winding sets are moved outside of the permanent magnet, which reduces the heights occupied by the winding sets and the PCB, facilitating the thinning of the fan.

Abstract: A hydraulic axial-piston machine achieves a control cut-off by an additional control edge of a control valve of an actuating mechanism for swiveling a swash plate.

Abstract: A liquid pump includes a pump assembly attached to a motor. The pump assembly includes an inlet chamber and pump chamber. The pump chamber accommodates a drive gear driven by an output shaft of the motor and driven gear meshed with the drive gear. An inner cover is disposed within the pump chamber. An outer cover overlies the inner cover with an elastic member disposed there between. The outer cover exerts a force to the inner cover through the elastic member and holds the inner cover in sliding contact with an axial end of the drive and driven gears. An outlet chamber formed between the inner cover and the outer cover is in fluid communication with and the pump chamber.

Abstract: An oil pump for a vehicle includes a driven gear, a drive gear, a pump body, and a plate. The drive gear engages the driven gear. The pump body is secured to a rear cover of a transaxle case. The plate is interposed between the rear cover and the pump body. A pump chamber is formed between the rear cover and the pump body. The driven gear and the drive gear are housed in the pump chamber. The pump chamber is formed: between the plate and the pump body, or between the plate and the rear cover.

Abstract: A valve plate or end cap includes a running surface having a pair of arcuate kidney ports formed thereon. The running surface also includes a plurality of pressure gradient grooves formed on the running surface, each pressure gradient groove having a proximal end adjacent to a respective one of the ends of one of the kidney ports and a distal end. The distal end of one of the pressure gradient grooves associated with one kidney port may overlap the distal end of a pressure gradient groove associated with the other kidney port. The distal end of at least one of the pressure gradient grooves is located outside the circumference of a pitch circle that passes through the center of each kidney port. The distal end of at least one of the other pressure gradient grooves is located inside the pitch circle circumference.

Abstract: A continuously variable transmission (CVT) provided with an integrated gerotor pump that also acts as a rotation blocker is described herein. In one illustrated embodiment, the gerotor pump is used to pump lubrication and cooling fluid through a radiator and into the hollow shaft of the CVT.

Abstract: A fuel injection pump is provided. The fuel injection pump includes a valve holder, a plunger, an inlet valve, an outlet valve, and a relief valve. The valve holder includes a pump chamber and a seat. The plunger configured to pressurize or depressurize the pump chamber. The inlet valve, the outlet valve, and the relief valve are arranged in an interior of the valve holder. The relief valve is provided on a downstream side of the outlet valve. The pump chamber is formed between the inlet valve and the outlet valve. The seat has a discharge passage and a return passage. The return passage is configured such that the fuel flows through the return passage from the downstream side of the outlet valve to an upstream side of the relief valve. The discharge passage and the return passage are formed offset from each other in the seat.

Abstract: An electromagnetic vibrating diaphragm pump capable of increasing pump efficiency by increasing the vibration amplitude of the vibration of diaphragms even when the pressure inside a compression chamber is high. Diaphragms are fixed to both end portions of an oscillator having magnets. AC driven electromagnets are provided in a manner to face the magnets of the oscillator. A frame adhered to the outer peripheries of the diaphragms covers the electromagnet side, and pump casings cover the opposite sides. The pump casing includes a compression chamber adjacent to the diaphragm, a suction chamber connected to the compression chamber via a suction valve and an exhaust chamber connected to the compression chamber via an exhaust valve, the suction chamber or the exhaust chamber being connected to the frame via a continuous hole.

Abstract: A compressor may include a crankcase, a crankshaft, a piston, a discharge valve and a suction plenum. The crankcase defines a discharge plenum receiving working fluid at a first pressure. The crankshaft is disposed within the discharge plenum. The piston is drivingly connected to the crankshaft and reciprocatingly received in a cylinder. The piston and cylinder cooperate to define a compression chamber therebetween. The discharge valve may control fluid flow through a discharge passage between the compression chamber and the discharge plenum. The suction plenum may receive working fluid at a second pressure that is less than the first pressure. The suction plenum may provide working fluid at the second pressure to the compression chamber.

Abstract: A stationary portion of a blower fan according to a preferred embodiment of the present invention includes a stator and a stator holding portion to which the stator is fixed. A rotating portion of the blower fan includes an annular rotor hub portion arranged around a central axis; a rotor magnet arranged along a circumferential surface of the rotor hub portion, and arranged radially inside a stator; and an impeller including a plurality of blades arranged along a circumferential direction of the rotor hub portion. An upper end of the stator is arranged at a level lower than that of an upper end of the rotor magnet. The impeller is arranged axially above the rotor magnet and is arranged to extend radially outward. The blades are arranged axially above the stator.

Abstract: A gas blower includes a housing, a motor and a resilient sealing member for safety improvement. The housing has a receiving space and receives a fan wheel inside the receiving space, and the housing has an inlet and an outlet in communication with the receiving space. The motor has a base and a shaft. The base couples with the housing, and the shaft rotatably couples with the base and firmly connects with the fan wheel. The resilient sealing member is arranged between the housing and the base and is in a ring shape. The resilient sealing member has a central through hole for the shaft to extend through, a radial extending portion extending in radial directions of the shaft, a first surface and a second surface opposite to the first surface, with the first and second surfaces abutting against the housing and the base respectively.

Abstract: The invention relates to a pump unit that can be driven by an electric motor, in particular for providing vacuum for a pneumatic brake booster, including a pump housing that can be closed by a working-chamber cover and at least one elastic displacement element, wherein a working chamber is bounded between the displacement element and the working-chamber cover and wherein inlet valves and outlet valves and inlet channels and outlet channels associated with the valves are associated with the working chamber. According to the invention, in order to reduce noise emissions, devices for reducing a contact surface between the working-chamber cover and the pump housing are provided.

Abstract: A fan assembly comprising an air inlet, at least one air outlet, an impeller, a motor for rotating the impeller to draw air through the air inlet, at least one heater assembly, and a user interface for allowing a user to select a speed setting for the motor from a user selectable range of speed settings, and for allowing a user to select one of a first and second operational mode of the fan assembly. A rotational speed of the motor is set depending on the user selected speed setting, and is selected from a first range of values when the first operational mode of the fan assembly has been selected, and from at least one second range of values when the second operational mode of the fan assembly has been selected, with each value within each of the range of values being associated with a respective speed setting.

Abstract: A vehicle and a method of reducing sound produced by a liquid fluid pump are disclosed. A pump is activated when a predetermined event is detected. A control valve of the pump is operated in one of an initial and a standard mode when the pump is activated. The control valve is operable to allow a gaseous fluid to vent out of the pump when in the initial mode corresponding to the pump being in a first phase. The control valve is operable to allow a liquid fluid to move through the pump when in the standard mode corresponding to the pump being in a second phase. A solenoid of the control valve is energized and de-energized, at a calibrated frequency, in a sequence when in the initial mode to reduce the sound in the pump during the initial mode.

Abstract: An example includes an apparatus to pump a fluid. The apparatus includes a housing extending along a length defining an elongate interior, an actuator in the housing, conforming to the elongate interior, the actuator including a plurality of lumens, each having a length extending substantially parallel to the elongate interior, each from around 10 to 200 micrometers across and an actuator configured to oscillate the actuator in the actuator housing along the length of the elongate interior with a rate differential between movement in a first direction versus movement in a second direction opposite the first direction to pump the fluid.

Abstract: A fan assembly includes a base, a body including an air inlet, impeller and motor driving the impeller to draw an air flow through the air inlet, an air outlet and an interior passage conveying air to the air outlet and extending about an opening through which air from outside the fan assembly is drawn by air emitted from the air outlet. A motorized oscillation mechanism housed within the base oscillates the body relative to the base about an axis and includes a second motor, a drive member driven by the second motor, and a driven member which is driven by the drive member to rotate relative to the base about the axis. The body is mounted on the driven member for rotation therewith. Interlocking members retain the body on the driven member and serve to guide tilting movement of the body relative to the base about a tilt axis.

Abstract: An anti-air-return fan system includes a motor, a driving control circuit, and a rotation judgment circuit. The driving control circuit is electrically connected to the motor. The driving control circuit has a driving signal for driving the motor to rotate according to the driving signal. The rotation judgment circuit outputs a judgment signal to the driving control circuit when detecting that the motor reversely rotate. The driving control circuit executes a braking according to the judgment signal. The driving control circuit drives the motor to operate when the rotation judgment circuit detects that the motor doesn't rotate reversely.

Abstract: A piston pump for a vehicle brake system includes a piston which is mounted in a cylinder so as to be movable along an axis. An inlet valve for introduction of fluid into the cylinder, and a sealing element configured to seal off the piston with respect to the cylinder are located on the piston. A first portion of the piston includes a valve seat of the inlet valve, and a second portion of the piston includes a piston rod. The sealing element includes a projection which engages axially over the first piston portion and extends to the second piston portion.

Abstract: In order to prevent working medium from accumulating in the compressor housing (2) of a piston compressor (1) in a simple manner by means of a sealing of the piston rod (7) in the form of sealing medium barrier supplied by a hydraulic unit (12), it is provided that a ventilator (32) and a sealing medium container (37), which is partially filled with sealing medium, are provided in the hydraulic unit (12), wherein the ventilator (32) suctions air from the free space of the sealing medium container (37), and the free space (45) in the sealing medium container (37) is connected via a line (15, 17) to the compressor housing (2), and an opening (16) is provided at the compressor housing (2) for connecting the interior of the compressor housing (2) to a purge gas reservoir (18).