Abstract: The invention relates to a fan, particularly for cooling an internal combustion engine of a vehicle, having an attachment unit, an electric drive motor, and a fan wheel rotating about the fan axis, wherein the attachment unit has a frame, from which bars protrude that cross through an air opening, said bars carrying an attachment element serving to attach the drive motor. The invention proposes that each of the bars (6) have a cross-sectional contour, wherein at least one cross bar (18) extending laterally in the direction of the fan axis (9) is configured between end regions (14, 15) of the bar (6) extending in the direction of the fan axis (9), defining a bar width (b).

Abstract: Check valve with a valve housing, on which is formed a valve seat. The valve seat is designed as an oblique face with respect to a flow direction. A shut-off element has at least one sheet-like shut-off tab which is composed of an elastically deformable material and which, in a shut-off position, bears against the valve seat and, in an opening position, is lifted off from the valve seat, in order to allow the passage of fluid. An abutment element is arranged on that side of the shut-off tab which faces away from the valve seat. The shut-off tab can abut against the abutment element in order to limit the amount by which the shut-off tab is lifted off from the valve seat.

Abstract: A system for changing a pump displacement configuration includes a blender that provides low-pressure fluid to a pump. The pump has a power end and fluid end, where the fluid end includes a number of plungers. The system includes an actuator that couples the power end with a selectable subset of the plungers. The system further includes a controller that selects a subset of the plungers according to a job pumping rate, a job pumping pressure, and/or a fluid end failure event indicator. The controller further commands the actuator to couple the selected subset of the plungers to the power end.

Abstract: A compressor includes a rotary shaft, a cam, a cylinder block, pistons, a thrust bearing, a rotary valve, and an oil passage. The rotary shaft has an in-shaft passage formed therein. The cam rotates integrally with the rotary shaft. The pistons are coupled to the rotary shaft through the cam. The thrust bearing is provided between the cam and the cylinder block. The thrust bearing includes a first race in contact with the cam, a second race in contact with the cylinder block, and rolling elements retained between the first and second races to form a gap therebetween. The oil passage extends from the gap to the in-shaft passage and includes an oil retaining space formed in at least one of the cam and the cylinder block.

Abstract: A pump assembly for circulating water in an evaporative cooler is provided. The pump assembly may include a housing which defines a cavity. The pump assembly may also include an impeller received in the cavity of the housing. Further, the pump assembly may include a rod which may be operatively associated with the impeller and extends out of the housing. Moreover, the pump assembly may include a connecting member which is operatively associated with the rod, and may be adapted to be operatively associated with a shaft of a fan assembly incorporated into the evaporative cooler. The connecting member may be adapted to transmit rotary motion of the shaft to the impeller, thereby enabling the pump assembly to circulate water in the evaporative cooler.

Abstract: A linear compressor is provided. The linear compressor includes a cylinder having a refrigerant compression space inside; a piston, linearly reciprocating inside the cylinder to compress a refrigerant; a frame having the cylinder affixed at one end and a mounting groove at a lower portion; an oil feed assembly positioned in the mounting groove to supply oil; an oil supply path in a linear shape, positioned at a lower portion inside the frame to communicate with the mounting groove and with a bottom of the cylinder and which supplies oil between the cylinder and the piston; and an oil recovery path in a linear shape positioned at an upper portion inside the frame to communicate with an upper side of the frame and with a top of the cylinder and which recovers the oil between the cylinder and the piston. The oil feed assembly is in kit form.

Abstract: Disclosed are various torsional restraint systems for torsionally restraining a jet pump assembly, wherein the jet pump assembly includes a riser pipe, a transition assembly on the riser pipe, and a restrainer bracket connecting a first and a second inlet mixer to the riser pipe. The torsional restraint system includes a first contact member operatively attached to a side of the jet pump assembly and a second contact member operatively attached to the side of the jet pump assembly and disposed from the first contact member such that the first and second contact members restrain the riser pipe from rotating about a centerline of the riser pipe.

Abstract: A double acting dual stroke fluid pump with pressure assists is disclosed. First and second pistons are mounted to a common shaft which reciprocates within first and second cavities during compression and suction strokes. The second piston may have a one way valve which opens and closes during the compression and suction strokes to enable the fluid pump to force fluid out of the outlet during both the compression and suction strokes.

Abstract: A micropump including a tube unit and a control unit. The control unit has a plurality of fingers. A cam sequentially presses the plurality of fingers from an inlet side to an outlet side of the tube. A drive unit gives rotation force to the cam, a control circuit unit controls operation of the drive unit, and a device frame holds the plurality of fingers, the cam, the drive unit, and the control circuit unit. A reservoir communicates with an inlet port of the tube; and a power source supplies power to the control circuit unit, wherein the tube unit is detachably attached to the control unit substantially in the horizontal direction with respect to the rotation surface of the cam and attached to the inside of a space produced by the device frame.

Abstract: A micropump including a tube unit including an elastic tube disposed in an arc shape, a plurality of fingers disposed radially from the arc shape of the tube, and a guide frame, which holds the tube and the plurality of fingers. The micropump also includes a control unit including a cam that presses the plurality of fingers, a drive section that applies torque to the cam, a control circuit that carries out a drive control of the drive section, and a machine casing that holds the cam, drive section, and control circuit. The tube unit is mountable in and removable from the control unit in a direction approximately parallel to the plane of rotation of the cam, and is mounted inside a space provided in the machine casing.

Abstract: A condensation sensor is provided within a power supply device that is provided integratedly with a vacuum pump main unit. When the condensation sensor detects condensation within the power supply device, a CPU closes a cooling water valve. This stops the flow of cooling water that flows through the interior of the power supply device, through a cooling water duct.

Abstract: A sealed compressor has a lower end cap secured to a center shell, and defines a sealed chamber. An electric motor is received within the sealed chamber. The electric motor drives a shaft that drives a compressor pump unit. A lower bearing housing includes a bearing for supporting the shaft, and an oil pump. The oil pump includes a pump housing including one of a slot and a leg, with the bearing housing including the other of a slot and a leg. The leg is received in the slot to position the pump housing within the bearing housing. The oil pump further includes a piston to be driven by the shaft to drive the lubricant from a sump in the sealed chamber upwardly into a passage in the shaft.

Abstract: A flow-controllable cell pump having a bearing element that may be positioned in a receiving shell of a pump housing such that the receiving shell may assume an operational connection with at least one of a bearing element, a pump chamber positioned between an inner rotor and a control slide valve. An outer rotor may be configured in the control slide valve, and suction kidneys may be arranged on both sides of the pump chambers in the pump housing. At least one pressure kidney may be offset on both sides of the pump chambers in the pump housing. The pressure kidney may be connected with a pressure connection socket, with a control slide valve arm configured on the control slide valve.

Abstract: A micro-electromechanical (MEM) synthetic jet actuator includes a semiconductor substrate having a cavity extending therethrough, such that a first opening is formed in a first surface of the semiconductor substrate and such that a second opening is formed in a second surface of the semiconductor substrate. A first flexible membrane is formed on at least a portion of the front surface of the semiconductor substrate and extends over the first opening. The first flexible membrane also includes an orifice formed therein aligned with the first opening. The MEM synthetic jet actuator also includes a second flexible membrane that is formed on at least a portion of the second surface of the semiconductor substrate and that extends over the second opening, and a pair of actuator elements coupled to the flexible membranes and aligned with the cavity to selectively cause displacement of the first and second flexible membranes.

Abstract: A centrifugal discharge pump (1) for electric household appliances, of unusual efficiency, having: a working chamber which has an intake opening and a delivery opening; an open impeller (10) arranged inside the working chamber and rotatable about a main axis (x) and a motor (5) designed to drive the impeller (10) by means of a transmission shaft (6). The impeller (10) has a planar support element (11) integral with the transmission shaft (6), and a plurality of blades (12) projecting from the support element (11); a free space (13) is provided between the blades (12) in order to allow the removal of foreign solids present in the discharge stream.

Abstract: The present invention provides a valve assembly for relieving fluid pressure having a pump housing with a low pressure inlet chamber and a high pressure discharge chamber, a relief aperture positioned between the low pressure inlet chamber and the high pressure discharge chamber, a valve seat along the perimeter of the relief aperture, and a valve body located in the high pressure discharge chamber. The valve body has a first end capable of engaging the valve seat in a closed position and is also capable of axial travel opposite the fluid discharge at a predetermined pressure.

Abstract: A swash plate compressor capable of realizing an excellent sliding characteristic when a drive shaft is rotated at high speed, and a high refrigerating capacity when the drive shaft is rotated at low speed, has a release passage for communication between a crank chamber and a suction chamber. The release passage includes a first passage communicated to an oil rich region, in the crank chamber, and a second passage communicated to an oil poor region, in which lubricating oil is small in quantity, in the crank chamber. A valve mechanism that increases an opening ratio of the first passage with respect to the release passage, as a rotational speed of a drive shaft increases, and increases an opening ratio of the second passage with respect to the release passage, as the rotational speed of the drive shaft decreases.

Abstract: Efficient micro-pumping of gas/liquids is provided. In one embodiment a pipeline of insulative material can be asymmetrically coated with electrodes. The asymmetric coating can affect the flow passage to create straight and swirl pumping effects. The electrodes can include electrode pairs arranged at intervals along the pipeline, each electrode pair being capable of inducing an electrohydrodynamic body force. The electrode pairs can be formed at the same surface, such as along the inner perimeter of the pipeline, and can be powered by steady, pulsed direct, or alternating current. Alternatively, the electrode pairs can be separated by the insulative material of the pipeline, and can be powered with direct or alternating current operating at radio frequency.

Abstract: A suction device for dental, medical and industrial purposes with a radial fan with a suction side and a delivery side. An air outlet of a centrifugal separator is connected to the suction side of the fan. At least one drive motor controlled by a control unit, and in the form of a rotating electric motor, drives the fan and the separator. A fan drive motor and a separator drive motor are arranged, uncoupled in terms of rotation, one behind the other on a common shaft fixed to the housing. The respective stators are supported by the common shaft. The rotating parts of the fan are connected to the rotor of the fan drive motor, and the rotating parts of the separator are connected to the rotor of the separator drive motor and are mounted to rotate coaxially with respect to the shaft fixed to the housing.

Abstract: A coupling system for receiving a push rod includes a housing defining an internal channel having a sloped wall, and a piston received within the internal channel. The piston includes at least one flexible member arranged within the channel to be acted upon by the sloped wall to engage the push rod. The only external force required to couple the push rod is an axial force on the piston in a direction. The only external force required to de-couple the push rod is an axial force on the piston in an opposite direction.