Abstract: An air compressor device includes a piston slidably engaged in a cylinder housing and having an outer peripheral groove formed by a base peripheral surface and two side surfaces, to form an outer opening and an inner recess, a motor is coupled to the piston to move the piston in the cylinder housing in reciprocating action, and a sealing ring is engaged in the outer peripheral groove of the piston, for making an air tight seal between the cylinder housing and the piston. The sealing ring includes a peripheral channel to form a base segment, an inner leg and an outer leg, the outer leg is extended out of the outer opening of the piston, for slidably engaging with a tilted or inclined inner peripheral surface of the cylinder housing, even when the piston is tilted relative to the cylinder housing.

Abstract: A miniature cooling device includes numerous improvements capable of increasing the reliability and useful lifetime of the device, as well as improving electrical power to cooling power conversion efficiency. The improvements include a unitary DC motor shaft design that incorporates a unitary mass flywheel into the shaft element and provides a solid shaft cross-section for increasing magnetic flux density in the DC motor. Additional improvements include a bend resistant flexible vane in the DC motor to compression piston drive coupler, reduced dead space volume within the compression cylinder, improved heat dissipation by a cylinder head cover and an athermalized compressor design that provides uniformly efficient operation over a wide range of operating temperatures. Further improvements include fabrication and coating improvements that increase the life of compression piston and compression cylinder wear surfaces.

Abstract: A hermetic compressor with a connecting rod that can be assembled with a crankshaft and a piston while the piston is in a cylinder integrally formed with a frame. The hermetic compressor includes the frame formed with a hollow portion, a drive unit disposed on the frame, a cylinder integrally formed with the frame, the piston disposed within the cylinder, a crankshaft, and a connecting rod. The piston linearly reciprocates within the cylinder. The crankshaft has a main shaft portion adapted to rotate by a drive force of the drive unit, an eccentric shaft portion provided at one end of the main shaft portion, and a weight balance portion provided between the main shaft portion and the eccentric shaft portion. The main shaft portion is rotatably supported in the hollow portion. The eccentric shaft portion is positioned eccentrically relative to the main shaft portion. The weight portion is adapted to compensate for a rotating imbalance caused by the eccentric shaft portion.

Abstract: A method and apparatus for lifting fluids from a well is provided. In one embodiment, a pump assembly comprises a rotary motor adapted to actuate a reciprocating pump. The motor shaft of the rotary motor is threadedly coupled to a drive member of the reciprocating pump. In operation, rotation of the rotary motor causes reciprocation of the reciprocating pump.

Abstract: A closed-loop vacuum control system for a powered breast pump is the subject of the present disclosure. The vacuum control system includes a source of vacuum for applying a vacuum to a milk collection kit. It also includes a device for setting the vacuum level to be produced by the source of vacuum to a preselected vacuum level. The vacuum control system further includes a sensor for sensing the actual vacuum level being produced by the source of vacuum during operation. A controller continuously compares the preselected vacuum level with the actual vacuum level. A proportional valve is also provided for adjusting the actual vacuum level to correspond to the preselected vacuum level. In this manner, the proportional valve can adjust the actual vacuum level in response to a signal from the controller.

Abstract: A reciprocating compressor driven by a linear motor, comprising a shell, within which are mounted: a reference assembly formed by a motor and a cylinder (1); a resonant assembly formed by a piston (2) reciprocating inside the cylinder (1), and by an actuating means (3) operatively coupling the piston (2) to the motor; two spring means (10) mounted to the resonant assembly and to the reference assembly and which are elastically and axially deformed in the displacement direction of the piston (2); a mounting element (40) coupling an end of one spring means (10) to an end of the other spring means (10); and a coupling element (50) mounted to the piston (2) and to the mounting element (40), which is axially displaced together with the piston (2) and displaced freely and transversally to the displacement direction of the piston (2), said coupling element (50) transmitting the axial forces between the piston (2) and the mounting element (40) and minimizing the application of radial forces to the piston (2).

Abstract: An apparatus and method for pumping fluids, such as water and/or hydrocarbons, from a subterranean formation or reservoir, include a linear rod pump having a mechanical rack and pinion drive arrangement, adapted for attachment to a pumping mechanism, such as the polished rod at the top of a rod string in a hydrocarbon well. The rack gear, of the rack and pinion drive arrangement, is adapted for connection to, and movement with, the polished rod. The pinion gear does not translate with the rack gear, and is driven by a reversible motor for affecting up and down reciprocating motion of the rack gear and pumping mechanism. Some forms of the invention include a compressible gas counter-balance arrangement. Some forms of the invention include an electronic drive configured for dealing with electric power generated by the motor during a portion of the pumping cycle.

Abstract: In certain embodiments, a pump includes a first end section having a fluid inlet and a fluid intake valve, a second end section having a fluid outlet, and a midsection disposed between the first and second end sections, wherein the midsection includes a piston coupled to a drive member. The pump also includes a first set of bolts coupling the first end section to the midsection, and a second set of bolts coupling the second end section to the midsection, wherein the first and second end sections are independently releasable from the midsection via the first and second sets of bolts, respectively.

Abstract: A refrigerating system includes: an evaporator (2) for performing a cooling operation as a refrigerant is evaporated; a compressor (4) for compressing the refrigerant discharged from the evaporator as a mover is reciprocally moved; a condenser (6) for changing the refrigerant compressed in the reciprocating compressor to a liquid refrigerant; and a capillary tube (8) for decompressing the refrigerant discharged from the condenser and transferring it to the evaporator. The refrigerant is an HFC refrigerant, hydrogenated carbon fluoride comprising hydrogen, fluorine and carbon and the lubricant is an ester-based lubricant, a sort of synthetic fluid, so that a lubricating performance and a performance of the refrigerating system can be improved.

Abstract: The invention relates to a motor-pump unit for a motor vehicle brake system, comprising a motor and a pump which is provided with a shaft that is driven by said motor, with the shaft end being rotatably mounted by means of at least one bearing in an accommodating member having valves and connecting channels, said shaft driving displacement means which are disposed in a chamber that can be filled with pressure fluid. In order to improve vacuum filling of the brake system with pressure fluid, the invention discloses that the shaft end terminates into a free space, and that at least one connection is provided between the free space and the chamber.

Abstract: A single piece offset mounting foot is positioned between the compressor and the floor of a cabinet for the compressor. The offset mounting foot has a main body having a geometric shape with a top and bottom surface connected by sidewalls that form a perimeter. A depression in the top surface receives a compressor and is offset in the direction of one of the sidewalls. A plurality of substantially equally spaced legs extend outward from the main body. The thickness of the offset mounting foot may be substantially uniform through the main body. The profile of the top surface in the main body is substantially concave forming a bowl-like surface that transitions smoothly from a minimum within the concave surface or concavity to a maximum in the direction toward the periphery and in the direction away from the center of the concavity. The bottom surface of the main body is configured or profiled to contact the floor or base of the cabinet into which the compressor is to be installed.

Abstract: An air pump includes a body being composed of two semi-housings. A sleeve is received in an opening at a top of the body. A rim is formed at a top of the sleeve and an annular recess is defined at a bottom of the sleeve. By fasteners through the rim, the sleeve is secured in the body. A motor is mounted on the body for driving a gear assembly in the body. A piston has a movable block movably received in the sleeve and a linkage eccentrically connected to the gear assembly. A discharge valve with a nozzle is mounted on the sleeve for discharging compressed air out from the nozzle. Whereby, the sleeve can be made with a small thickness, so its cost is low. Moreover, it is easy to install the sleeve in the correct position to ensure the piston to smoothly reciprocate in the sleeve.

Abstract: A sprinkler system for building includes an internal combustion engine which operates a water pump. The water pump in turn forces water through pipes to sprinkler heads. The engine is at least in part controlled by a throttle control mechanism which includes a spring biased piston which is moved in response to the output pressure of the pump. This prevents the pump from exceeding the rated pressure of the system components.

Abstract: An ultrahigh-pressure fluid system, such as an ultrahigh-pressure fluid pump, includes an improved dynamic seal assembly that can withstand pressures above 40,000 psi, and more preferably, pressures up to and beyond 87,000 psi. The dynamic sealing assembly includes a plastic seal having a bore through which the plunger reciprocates, and a bearing positioned adjacent the seal, also having a bore through which the plunger reciprocates. A seal carrier surrounds the circumference of the bearing and is subjected to a compressive force that is sufficiently high to circumferentially collapse the seal carrier in a radial direction against the bearing. This collapse of the seal carrier against the bearing causes an inner surface of the bore through the bearing to achieve substantially uniform contact with an outer surface of the plunger when the assembly is subjected to ultrahigh-pressure, thereby eliminating gaps that occur in prior art systems.

Abstract: A hermetic compressor capable of appropriately injecting oil from an eccentric unit of a rotating shaft in accordance with amounts required by respective regions. The hermetic compressor comprises a compression chamber in which a refrigerant is compressed, a piston to compress the refrigerant in the compression chamber, a rotating shaft to provide a drive force to advance or retreat the piston in the compression chamber, the rotating shaft having an oil path formed therein, a hollow eccentric unit to eccentrically rotate as the rotating shaft rotates, a bushing coupled to the eccentric unit and having a closed surface to close an opening of the eccentric unit, and an oil injection port formed at the bushing to determine an injection direction and injection degree of oil injected along an inner peripheral surface of the eccentric unit.

Abstract: A hermetic compressor capable of preventing malfunction due to impurities trapped between contact portions of a crankshaft and a crankshaft supporting frame when the crankshaft rotates in a hollow portion of the frame. The hermetic compressor comprises the frame having the hollow portion, the crankshaft rotatably inserted in the hollow portion, a balance weight provided at one end of the crankshaft, and a thrust portion formed at the frame to support the crankshaft. An impurities discharge passage is formed at an outer circumferential surface of the crankshaft that comes into frictional contact with the thrust portion of the frame to guide impurities, mixed with the oil, out of the crankshaft. Correspondingly, a plurality of discharge guiding grooves is formed at the thrust portion of the frame to guide the oil and the impurities, having passed through the impurities discharge passage of the crankshaft, out of the thrust portion.

Abstract: A system and method are disclosed for controlling an integrated rotary-linear actuator system that may be coupled to a network via a network interface. The integrated rotary-linear actuator system includes a control system and a rotary-linear actuator having a moveable plunger and associated coils. The coils may be energized to interact with associated magnets to effect corresponding movement of the plunger, which may include rotation and/or linear movement. The network interface facilitates receipt of control information at the control system of the integrated rotary-linear actuator system from the network. The control system may control an amplifier to energize the coils based on the control information.

Abstract: A hydraulic axial piston pump comprising a cylinder block closed at sides by a head and by a containment casing for piston actuating a plate, an electric motor coupled to the plate, reversible locking means for a bypass valve inserted in a seat of the body and kinematically connected to a microswitch connected to the electric motor, the reversible locking means comprising a retention element insertable transversely to the seat in a receptacle formed in the body without structure discontinuity, the bypass valve head being integrated in a shell external to the body and enclosing the microswitch and the kinematic system.

Abstract: A method of manufacturing a linear compressor includes measures to account for possible variations in manufacture of the spring connecting between a cylinder part and a piston part. In the method, the piston is located at a predetermined axial position in the bore of the cylinder of the compressor. A spring that is connected with the cylinder part is extended so that a piston connection point of the spring is at a position based on a predetermined displacement of the spring or a position in which the spring exerts a predetermined reaction force. In this position, this piston and the spring connection point are thus separated by a distance that depends on the actual formed dimension of the individual spring. The piston and the piston connection point are subsequently joined to have a rigid axial separation that is fixed according to the separation attained in these steps.

Abstract: A reciprocating piston compressor for a gaseous medium is provided having a reduced structural height. The compressor is especially for a level control system in a motor vehicle. The maximum pivot angle of the piston ring longitudinal axis relative to the longitudinal axis of the cylinder running path is smaller during the upward movement of the piston than for the downward movement of the piston. The longitudinal axis of the cylinder running path is offset relative to the first spatial axis.

Abstract: A multi-layered compressor housing and method of manufacture is provided. The housing defines an interior space and includes first and second layers having first and second major surfaces respectivley. The first and second layers are secured together by the frictional engagement of the first and second major surfaces which each substantially enclose the interior space defined by the housing. The housing may be manufactured by placing first and second layers of sheet stock material in mutual facing engagement wherein the two layers are relatively moveable. The first and second relatively moveable layers are then simultaneously formed into a non-planar shape defining at least a portion of the housing. A compressor is then mounted in the housing and the housing is hermetically sealed. The simultaneous forming of the first and second layers into a non-planar shape causes the frictional engagement of the layers whereby the layers are secured together.

Abstract: A pump unit for a hydraulic vehicle brake system with traction control has an electric motor driving a radial piston pump. A rotor shaft of the pump unit has a hollow shaft with two standardized, hardened cylindrical pins that are press-fitted into the ends of the hollow shaft. The rotor shaft can be produced simply, economically, and without metal-cutting machining. The hollow shaft has high bending and torsional strength. The rotor shaft has a small diameter at the bearing points, which makes a small bearing diameter and thus a small installation space for the pump unit possible.

Abstract: A hermetic electric compressor is capable of efficiently pumping up a necessary amount of lubricating oil even at low-speed rotation and has a simple constitution to provide an excellent workablity in assembling. The hermetic electric compressor includes an oil pump. The oil pump includes (i) a slanting channel formed in the lower portion of a main shaft and slanting from the lower portion to the upper portion thereof outwardly, (ii) a throttle formed at the bottom end of the main shaft and having an inlet port of diameter smaller than the section of the slanting channel at the center thereof, and (iii) a lower communicating passage for providing a communication between the bottom end of a spiral groove and the slanting channel. This constitution is capable of effectively lift the head of the lubricating oil.

Abstract: In a piston pump (1) having a differential piston (12) positioned in a cylindrical housing (11) and translationally drivable, a first pressure chamber (13) of the differential piston (12) is connectable to a second pressure chamber (14) via a check valve (16) inserted into a connecting line (15), and to a storage reservoir (2) via an inlet valve (23). The differential piston (12) is provided with a dipping piston (41) attached to a piston rod (31). In addition, a pass-through (32) of the piston rod (31) from the first pressure chamber (13) is closed fluid-tight by seals (34), and a transport line (22) is positioned laterally offset from or concentric to the piston rod (31) in the vicinity of the pass-through (32) of the latter.

Abstract: A reciprocating hermetic compressor includes a cylinder block internal to a shell and carrying a cylinder and a radial bearing hub; a crankshaft vertically mounted in the radial bearing hub and carrying, inferiorly, a rotor of an electric motor and, superiorly, a support annular face and an eccentric portion. The radial bearing hub incorporates an upper tubular extension, bearing a corresponding extension of the crankshaft and around which is mounted an axial rolling bearing for supporting the weight of the crankshaft-rotor assembly, as well as the axial stresses produced during compression of the refrigerant gas.

Abstract: A device used for controlling brake fluid pressure includes a plunger pump, for pressurizing brake fluid, and a drive motor for driving the plunger pump. The plunger pump and the output shaft of the drive motor are coupled together so as to transmit power through a cam mechanism arranged in a motor cam chamber. The motor cam chamber is provided with a communication passageway to allow brake fluid seepage to flow from the motor cam chamber to an interior chamber such as a solenoid chamber and/or one or more spring-enclosing chambers. The motor cam chamber is sealed from the exterior and brake fluid seeping into the motor cam chamber is contained within the interior of the device used for controlling brake fluid pressure.

Abstract: Suction gas feed assemblies to provide gas to a hermetic compressor are provided. The feed assemblies have capacity for reducing suction noise resulting from suction conduit vibration, valving operation, suction gas pulsing, or the like. The suction gas feed assemblies include a suction plenum in the form of a substantially cylindrical end cap or motor cap having substantially straight side wall, a contoured top wall, and a gas inlet aperture and suction conduit aperture which are configured to provide strong suction and motor cooling, with reduced superheat, suction pulsation, and noise attenuation. The motor cap has excellent structural stiffness and low sound radiation.

Abstract: The diaphragm suction pump has a pump chamber (7) located in a base plate (6), the wall of said chamber extending in a conical manner from a central flat base section (7?) to the lateral edge (8). The elastic pump diaphragm (5), which spans the pump chamber (7), is configured in such a way that it lies tightly against the entire pump chamber wall at the top dead center point of the drive connecting rod (4). The diaphragm (5) consists of a self-supporting elastic material with rear recesses (9; 10), which form hinges that can be elastically pretensioned during the operation of the diaphragm (5).

Abstract: A portable pump includes a rotating elliptical plate mounted on a rotating shaft, an elliptical plate follower with rollers or bearings positioned on the top and bottom surfaces of the rotating elliptical plate at a fixed distance from the axis of the supporting rotating shaft, rollers or bearings on the plate follower mated to roller or bearing races to restrict movement of the elliptical plate follower to directions parallel to the axis of the rotating shaft, a well pump tube with a bottom check valve affixed to the elliptical plate follower so that horizontal rotation of elliptical plate causes alternate vertical lifting and draining of the pump tube so as to pump water or other fluids from a well. Alternate embodiments of the invention replace the well pump tube and check valve with a driven piston, confining cylinder, and check valves to allow creation of a partial vacuum, compression of a fluid, or pumping of any flowable material.

Abstract: A unit utilizing current to control reciprocation for pushing fluids, including a chamber, a magnet, a coil connected with a circuit, a first inlet, a first outlet, a second inlet, a second outlet, a first valve and a second valve. The magnet is slidably disposed in the chamber. The coil is disposed around the chamber for driving the magnet to reciprocally move. The first inlet and first outlet are disposed at one end of the chamber. The second inlet and second outlet are disposed at the other end of the chamber. The first valve is disposed between the first inlet, the first outlet and the chamber. The second valve is disposed between the second inlet, the second outlet and the chamber. The magnet can drive the first and second valves to suck a fluid into the first and second inlets and push a fluid out of the first and second outlets.

Abstract: A compact 180° opposed piston pump/compressor minimizes axial spacing between its pistons on the drive shaft and thereby reduces the shaking couple and noise from reciprocation. Each piston has its own eccentric element press-fit into the connecting rods so as not to occupy space between the pistons. The shaking couple can be further reduced for pistons of different masses by selecting the mass of the cup retainers to compensate for the difference in overall piston masses. The pump also includes an improved cylinder sealing arrangement having a circumferential groove in an angled surface at the end of the cylinder. The pump also has a special cover and seal for closing the open neck of the pump crankcase and an improved multi-lobed valve stop. The pump further uses tubular transfer members for transferring intake and/or exhaust air into the crankcase and/or between valve heads.

Abstract: A high-performance hermetic type compressor in which the influence of a cylinder bore deformation caused during assembly is reduced and the sealing tightness between a piston and a cylinder block is improved. A bore hole in the cylinder block has a hollow portion. Depth H1 of the hollow portion is larger than thickness H2 of compression space V at the moment when the pressure in the compression space V reaches the discharge pressure level Pd.

Abstract: A micropump provided with a cylindrical body (1) containing a measuring chamber (10) defined by a piston (2) and communicating firstly with a tank via an inlet orifice (10a) provided with an inlet valve, and secondly with the outside via an outlet orifice (10b) provided with an outlet valve, the micropump being characterized in that the piston (2) is connected to an external reciprocating actuator, and in that at least one of said valves is constituted by a valve member (3, 6, 7) suitable for being driven in translation by friction contact with said piston (2) successively in one direction and then in the other, and whose stroke inside the chamber (10) is shorter than the stroke of said piston.

Abstract: A connecting rod apparatus for converting a rotational motion to a reciprocal linear motion by connecting an eccentric portion of a crank shaft to a piston. The connecting rod apparatus has a bushing, a connecting rod and a connecting member. The bushing is rotatably connected with the eccentric portion, and has a sloping side on its outer surface with a predetermined slope in regard to an axis of the eccentric portion. The connecting rod has a piston attachment formed at one end for being connected with a piston pin which is connected with the piston. A connecting portion is formed at another end of the connecting rod and is connected with the bushing in a direction of the axis along the sloping side of the bushing. The connecting member connects the connecting portion and the bushing so that the connecting portion and the bushing can move relative to one another.

Abstract: A diaphragm pump and method for making same, the pump having a diaphragm coupled to a wobble plate achieved using: a post (11) protruding from the wobble plate toward the diaphragm and at least partially surrounded by a collar (11a); and a pin (22) protruding from the diaphragm toward the wobble plate and having a recess (22a) for mating with the post (11) and also having an outer portion (22b) surrounding the recess (22a) and able to resiliently deform so as to squeeze through the collar (11a) when the pin (22) is pushed onto the post (11). The outer portion (22b) of the pin typically includes a locking feature (22c) for holding the pin (22) on the post (11). The pin (22) and the diaphragm are typically made from thermoplastic materials, with the pin (22) typically made from a harder material than the diaphragm.

Abstract: The present invention relates to a well pumping unit driven by a linear motor. The well pumping unit includes a slideway support, a linear motor having a motor complex primary and a motor complex secondary, a polished rod chain, a polished rod chain wheel assembly, a bottom support chain wheel, a counterweight chain wheel, a counterweight chain, and a counterweight. The complex secondary, polished rod chain wheel assembly, bottom support chain wheel and counterweight chain wheel are fixed on the slideway support, the complex primary moving along the slideway support. A first end of the polished rod chain is fixed to an upper end of the complex primary and passes over the polished rod chain wheel assembly, with a second end fixed to a polished rod. A lower end of the complex primary is fixed to a first end of the counterweight chain, the counterweight chain passes over the bottom support chain wheel and counterweight chain wheel and is fixed to the counterweight at a second end thereof.

Abstract: Digital fluid pumps having first and second electromagnetic actuators formed in part by a piston to alternately drive the piston in opposite directions for pumping purposes. The piston motion is intentionally limited so that the electromagnetic actuators may operate with a high flux density to provide an output pressure higher than that obtained with conventional solenoid actuated pumps. The electromagnetic actuator coils are electrically pulsed for each pumping cycle as required to maintain the desired fluid flow and output pressure, with the piston being magnetically latchable at one or both extreme positions between pulses. Alternate embodiments and control methods and systems are disclosed.

Abstract: An air compressor having a cooling fan that cools both a pump and an electric motor. Baffle compress air against the top of the motor, causing it to break up and flow around fours sides of the motor and through the motor. The pump includes an elongate intake tube or muffler that attenuates pump intake noise. A compressor tank for the air compressor includes a roll cage for protecting a condensate valve for the compressor tank. The compressor tank includes a rim base formed on the bottom of the compressor tank that permits the compressor tank to rest on a surface without additional supports or legs. Controls and gauges are mounted in the bottom clamshell piece, and openings on a top fit around the controls and gauges. The top and the bottom are aligned with guides so that the controls and gauges may be properly aligned with the openings.

Abstract: A small piston pump is disclosed with a housing having a pair of space and connected pistons therein. The housing has a bore with one of the pistons engaging the bore near one end and has a sleeve mounted therein adjacent the other end. The second piston slides in the bore of the sleeve. One end of the sleeve has an inlet covered by a slit valve and in the end of the sleeve adjacent the slit valve it has a radial outwardly extending opening covered by an elastic band to control the flow of fluid thru the radial outward opening. The other end of the sleeve is carried by the housing bore with a passageway therebetween. A pump output opening is disposed in the housing between the sleeve and the one of the pistons.

Abstract: The present invention relates to an ABS pump housing. The ABS pump housing includes: a motor-receiving unit, a pump-receiving unit, an entrance solenoid valve, an exit solenoid valve and an accumulator-receiving unit, wherein the accumulator-receiving unit comprises: a first chamber, a second chamber arranged above the first chamber and having a diameter smaller than that of the first chamber, a first communication port for communicating the first chamber with the pump-receiving unit and a second communication port for communicating the second chamber with an exit solenoid valve-receiving unit in a rear end of the pump housing. A flow path of the first communication port communicating with the pump-receiving unit is readily formed in a large size. The second chamber is formed to communicate with the exit solenoid valve in the exit side so that any additional communication port is not necessary, by which the pump housing is downsized and light-weighted.

Abstract: A reciprocating compressor comprises an inside stator formed by piling a plurality of stator cores to have an actinomorphic cylinder shape, which is press-fitted to a frame, and a streak protection member and a burr shielding ring installed between the inner aspect of the inside stator and corresponding outer aspect of the frame. Thereby the burr generating between the frame and the inner stator by a streak is prevented previously, and even if a burr is generated, this burr is locked in a burr escape unit in the burr-shielding ring. Therefore degrading of valve function and an abrasion of a sliding unit in a compressing unit by the burr generating is prevented and the vibration noise of the compressor is reduced by assembling the frame and the inside stator strongly.

Abstract: A linear actuator includes an inner yoke, an outer yoke and a coil for generating a magnetic field between the outer yoke and the inner yoke. The outer yoke includes a first facing portion facing the inner yoke and a second facing portion which faces the inner yoke. An insulating coil bobbin around which the coil is wound includes an engaging part which engages with both the first facing portion and the second facing portion of the outer yoke. A magnet is disposed between the inner yoke and the outer yoke and a movable body is integrally connected with the magnet. An alternating magnetic field is generated by the coil such that the movable body along with the magnet is reciprocally moved in the axial direction in conjunction with the alternating magnetic field.

Abstract: A hermetic reciprocating compressor, in which a bearing structure to support a rotating shaft is improved to minimize frictional contact between the parts of the compressor, thus reducing noise of the compressor and improving compression efficiency of the compressor. In the hermetic reciprocating compressor, a first annular bearing seat is formed around an upper edge of a shaft bore of a frame to seat therein a first radial bearing which sustains loads of a rotating shaft. The first radial bearing is a self-aligning radial bearing which allows the rotating shaft to self-align due to a clearance angle of the first radial bearing, even when a desired perpendicular arrangement of the shaft bore relative to a cylinder block is not formed, due to a mechanical tolerance of the frame.

Abstract: Despite the axial sandwich assembly of the motor housing (1), pump housing (2) and electronics housing (3), it is possible by using simple manufacturing and assembly techniques to provide a plug connection, which is free from distortions and resistant to breaking, with supply lines and control lines (4.1; 4.2) that start from a brush plate (6) inside the motor housing (1) and pass through the pump housing (2) up to the electronics housing (3). To this end, the supply and control lines (4.1; 4.2) are fastened in the manner of a fixed plug via their ends, which are located on the motor housing, as a pre-assembled component to a fastening flange (6.2) that radially projects above the motor housing (1). The fastening flange (6.2), in the plugging direction counter to its plug connection with the electronics housing (3), can be supported via at least one supporting rib (6.1) on the outer periphery of the motor housing (1).

Abstract: Despite an axial sandwich structure of a motor housing (1), pump housing (2) and electronics housing (3), in a simple production and installation process a plug-in connection comprising power supply and control conductors (4.1;4.2) that is devoid of distortion can be produced between a brush plate (6) in the motor housing (1) and the electronics housing (3) passing though the pump housing (2). To achieve this, the power supply or control conductors (4.1;4.2) are configured as a fixed plug-in connector, with their ends on the motor housing side fixed into the brush plate (5) in the form of a pre-assembled component unit, in particular as a one-piece, bent part of a punched grid (4) that has been injected into said brush plate. Their free plug-in ends on the other hand, which are surrounded by an elastic insulating jacket, can be elastically bent away in a transversal direction to their axial direction of insertion in order to compensate tolerances.

Abstract: Motor pump system includes an electromagnetic motor comprising a main body, a coil, and a movable hollow free piston. A flow meter is coupled to one end of the electromagnetic motor. A cylinder block is coupled to another end of the electromagnetic motor. At least two non-return valves are included. A water inlet, a water outlet, and a pressure limiting device are also provided. A motor pump system is also provided which includes a motor including main body having an inlet end and an outlet end. A flow meter is coupled to the inlet end. An outlet body is coupled to outlet end. A pressure controller is provided comprising an end piece and a fixed element which is removably coupled to the end piece. The fixed element is coupled to the outlet body.

Abstract: The invention relates to a breast pump, which in addition to a drive motor (7), vacuum diaphragm pump (1) and programme-controlled electronics (4), comprises a vacuum chamber (12) with a separation diaphragm (13), which is connected between a pump intake conduit (9) and an extraction hood (11). The first chamber (14) is equipped with a device (16) for the negative or positive aeration of said chamber. Said device (16) is also programme-controlled by the electronics (4) during the normal continuous operation of the pump (1).

Abstract: A pump exerts pressure on fluid that has higher saturation pressure than atmospheric pressure at room temperature in a fluid reserving chamber in a fluid tank. The pump is located near the fluid tank. The pump has a housing and a heat generating mechanism. The housing defines a pump chamber, a motor chamber and a communication passage between the pump chamber and the motor chamber and includes at least one introducing port for introducing the fluid from the fluid reserving chamber into the housing and a bleeding port located above the introducing port for returning the fluid from the housing to the fluid reserving chamber. The heat generating mechanism is located in the housing. The fluid circulates into the housing through the introducing port and out of the housing through the bleeding port for substantially reducing the temperature in the housing.

Abstract: A reciprocating compressor that includes a cylinder block with a plurality of cylinder bores. A piston is positioned in each bore. Each piston is mounted to move in response to the a crankshaft, causing each piston to reciprocate within the cylinder bore. The compressor further includes a cylinder head which includes bores corresponding to the bores in the cylinder block. The cylinder head includes a suction port in fluid communication with a source of compressible gas and a plurality of suction plenum in the cylinder head. Protrusions or ribs extend into the suction plenum. The cylinder head also includes a discharge plenum in communication with the outlet ports of the valve plate Interposed between the cylinder head and the cylinder block is a valve plate assembly having a discharge valve, and a discharge valve retainer having a pair of radii assembled to the valve plate by snap fitting a cylinder head gasket over the discharge valve and retainer.

Abstract: A reciprocating compressor includes: a reciprocating motor, an outer stator and an inner stator provided with at least one step portion at both sides thereof, and an armature linearly moving therebetween; a compression unit having a cylinder and a piston inserted in the cylinder to receive a linear and reciprocal driving force of the reciprocating motor and compress a gas; a suction unit sucking a gas into the compression unit; a discharge unit discharging the gas compressed in the compression unit to outside the container; a resonance spring unit elastically supporting the piston and the armature; and a frame unit supporting the compression unit and the reciprocating motor. Because stable driving is achieved in its operation, generation of vibration and noise can be minimized, heightening reliability. In addition, the amount of gas discharge can be accurately controlled.