Abstract: High-pressure cleaning device with an electric motor and a pump for conveying a cleaning fluid, with a plunger, which is displaceable by the cleaning fluid in dependence on its pressure or its flow rate, and with an electric switch, which is actuable by the plunger on its displacement, with electrical leads from the power source and to the windings of the electric motor disposed in the box, with devices attached to the box for fastening the box to the casing of the electric motor and/or pump, characterised in that the switch is disposed in the box, that the walls of the box have openings for the electrical leads, in which outwardly directed contacts are disposed, wherein at least one opening is configured as a multiple plug connection, that the box is fastened via a plug connection to the casing and that the multiple plug connections are disposed on the box in such a manner that at least one matching plug connection fastened to fit on the casing is necessarily connected when the box is fastened to the casing

Abstract: A reciprocating machine such as a vacuum pump includes a cylinder in which a reciprocating piston is disposed for reciprocating movement. A variable voltage driver is provided for driving the piston and a vibration sensor is provided for sensing contact between the piston and ends of the cylinder. A controller interconnects the sensor and driver to control movement of the driver and piston to maximize piston stroke and reduce if not eliminate contacting of the piston with the cylinder.

Abstract: A resistive muffler attenuates sound generated by the gas intake and suction valve during compressor operation of a refrigerant compressor. The resistive muffler is assembled inline with the suction gas flow of the compressor and is positioned within the compressor housing. The resistive muffler attenuates the sound generated by the compressor during its operation as refrigerant gas is drawn into the compressor from an evaporator and passes through the resistive muffler in transit to the suction valve and hence to the region of the compressor where the gas is physically compressed. The resistive muffler includes a muffler housing having an intake end and an exhaust end. An acoustic foam assembly is incorporated into the muffler housing.

Abstract: A motor structure for a reciprocating compressor, by which an power lowering of the motor can be prevented by installing a magnet to be eccentric toward a direction compressing a fluid to compensate a backward moved amount of the magnet by compression pressure during operating the compressor and a motor saturation can be prevented, comprises: an outer core of cylindrical shape fixed inside a sealed chamber and including a winding coil wound therein; an inner core disposed on an inner circumferential surface of the outer core with a predetermined gap for forming a flux with the outer core when an electric source is applied to the winding coil; and a magnet disposed between the outer core and the inner core so as to move linearly for making a piston to perform a linear reciprocating movement, wherein an initial mid position of the magnet is located to be eccentric as a predetermined distance from a mid position of the outer core and of the inner core toward a moving direction of the piston when a fluid is compr

Abstract: It is sought to provide a small-size and highly safe bellows pump dealing with an explosive gas or the like as pump feed fluid, which can prevent hazards due to reaching of a drive motor or like drive part by the pump feed fluid caused to leak out when the bellows is broken. A flexible partition membrane is stretched between the movable end of the bellows and the pump housing to make the outside-bellows region to be a sealed chamber. The flexible partition membrane can follow the reciprocation of the bellows and does not interfere with the operation thereof. When the pump feed fluid leaks out from the pump chamber due to breakage of the bellows during operation thereof, it is retained in the sealed outside-bellows region, and does not reach the drive part including the drive motor. Also, the flexible partition membrane prevents dust intrusion to the bellows side, thus preventing such troubles as the breakage of the bellows otherwise stemming from the dust intrusion.

Abstract: A free piston gas compressor comprising a cylinder, a piston reciprocable within the cylinder and a reciprocating linear electric motor derivably coupled to the piston having at least one excitation winding. A measure of the reciprocation time of the piston is obtained, any change in the reciprocation time is detected and the power input to said excitation winding is adjusted in response to any detected change in reciprocation time.

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 linear compressor for multi-compression includes a stationary cylinder, a moving piston, and a stationary piston. The stationary cylinder has a first compression chamber formed therein. The stationary cylinder is provided at one side thereof with an outlet part. The moving piston is movable forward and backward by a linear motor, that compresses a fluid in the first compression chamber. The moving piston has a second compression chamber formed and is provided, at the .position where the second compression chamber communicates with the first compression chamber, with a first valve. The stationary piston is fixedly disposed in the compressor. The stationary piston is fitted in the moving piston so that the fluid in the second compression chamber is compressed as the moving piston is reciprocated.

Abstract: Reciprocating electromagnetic micro-pump, particularly for small electrical appliances, whose pumping chamber is defined by a tubular element, movable axially, against the action of a contrasting spring, between an advanced position of normal operation of the pump and a retracted position in which the outlet fitting of the pump is placed in communication with the cavity of the hollow body within which is movable in reciprocating fashion the core bearing the piston and which in turn communicates with the inlet fitting of the pump, in such a way as to absorb and anomalous overpressures generated, in operation, downstream of the pump.

Abstract: A dosing pump is provided comprising a working membrane defining a working area, and a pump drive for creating an oscillating movement of the working membrane. The direction of the pump drive can be inverted and the displacement element can be moved back and forth. The inventive dosing pump also comprises a position sensor for detecting the position of the pump drive, an electronic control system for the same, and a pump head in which an inlet valve and an outlet valve are arranged. The pump drive comprises a positioning motor and can be displaced back and forth in an oscillating manner, with the part thereof connected to the displacement element, in any range of its entire working displacement, according to a pre-determinable course, for a reduced pump capacity in relation to the maximum pump capacity. At least the inlet valve is externally controlled and comprises a motor-driven valve drive.

Abstract: The present invention provides an improved design of linear motor as well as an improved control strategy. The design allows for a shorted stator, where the armature magnets are controlled to reciprocate to a greater maximum displacement that for a equivalent conventional linear motor. The control strategy is such that a minimum of external sensors are required. The linear motor is driven at its resonant frequency ensuring optionally efficient operation. A determination of the maximum current is made based on a relationship with the resonant frequency and the evaporating temperature/pressure of the vapour entering the compressor. The current is then limited to control the maximum displacement to avoid damage.

Abstract: Known compressors are matched to a predetermined power range and therefore cannot supply consumers of a closed air supply system as well as an external consumer with an adequate quantity of air. The invention is directed to a method for limiting the power of a multi-stage compressor wherein at least one compressor stage is switched off when a predetermined power limit is reached. In this way, the lowest compressor stage can be so selected that the external consumer obtains an adequate volume flow. The compressor for the method includes a bypass line (22) which bypasses the inlet valve (19) of a low-pressure chamber (11) and thereby connects the low-pressure chamber (11) to its upstream intake space (16). A controllable control valve (23) is disposed in the bypass line (22) and realizes the connection of the low-pressure chamber (11) to the intake space (16) at a predetermined opening pressure.

Abstract: An integrated piston operating assembly for a linear compressor and a method for manufacturing the same are provided. The integrated piston operating assembly includes a piston coupling boss coupled to a piston, a plurality of magnets disposed in a cylindrical arrangement concentric with the piston coupling boss, and a linking member formed of a resin for connecting and thus integrating the piston coupling boss with the plurality of magnets. The magnets and piston coupling boss are secured to the linking member as the linking member is injection molded. By integrating the piston operating assembly of the linear compressor, geometric and assembling tolerances are improved, while deterioration of persistence due to processing and assembling processes is prevented.

Abstract: The invention includes an apparatus for pumping a fluid through a reciprocating pump. Several motors are responsible for operating the pump assembly. Each of the motors has a drive shaft. The motor drive shafts are connected to a series of drive gears. The drive gears are operably connected to a single driven gear for rotating the driven gear. The single driven gear connects with the pump assembly and drives the reciprocating pump in order to force fluid through the reciprocating pump.

Abstract: A lead screw mounting system for a syringe pump in which a second end of a lead screw is located within a hollow connection tube that connects a drive device engaged with the lead screw to a plunger drive head. A bearing mount is formed at the second end of the lead screw and a split bearing mounted to the bearing mount. The bearing mount has diverging bearing surfaces in an hour glass shape and the bearing has a complementary inner shape. The bearing is larger than the inner diameter of the connection tube and is in constant contact with the tube. During operation, the bearing tends to move up one or the other of the diverging bearing surfaces of the bearing mount depending on which direction the hollow connection tube is moving over the bearing creating a wedge action. The split bearing functions to keep the lead screw concentrically located within the hollow connection tube thereby increasing flow uniformity of the syringe pump.

Abstract: Various embodiments of the invention, therefore, provide pumps, and methods for their production. One exemplary embodiment of the invention comprises a ceramic plunger pump assembly. The pump assembly can include a pump body, which defines a pump chamber with an inlet port and an outlet port. The pump body can further define a plunger port disposed between the inlet port and the outlet port. In certain embodiments, the pump assembly can further include a ceramic plunger housing, which defines a cylindrical bore having an interior diameter. The plunger housing can be disposed within the plunger port. The pump assembly can also include a ceramic plunger. In particular embodiments, the ceramic plunger is slidably disposed within the cylindrical bore, such that the ceramic plunger may be reciprocated back and forth within the bore. Thus, the fluid can be moved from the inlet port of the pump chamber to the outlet port of the pump chamber through the reciprocal action of the plunger.

Abstract: A fluid discharge pumping apparatus includes: a drive mechanism; a cylinder; an outflow valve mechanism and an inflow valve mechanism coupled to the cylinder; a piston member inside the cylinder; and a piston-supporting member attached to the piston member driven by the drive mechanism to move the piston member. The inflow valve mechanism opens when the interior of the cylinder is depressurized, whereas the outflow valve mechanism opens when the interior of the cylinder is pressurized.

Abstract: An oil supplying apparatus for an opposed type reciprocating compressor comprises oil kickers which are mounted on spring supporting plates coupled to armatures of respective reciprocating motors, or oil valves which are mounted on oil paths formed on a cylinder and coonnecting with a suction path, and thereby, oil in a casing can be supplied to a slant portion between the cylinder and pistons regardless of the installation type of the compressor. In addition, lack of oil in the compressor and friction caused by the lack of oil can be prevented in advance, and a reliability of the compressor can be improved.

Abstract: A compressor includes a motor unit formed of a stator and a rotor, a compressor mechanism driven by the motor unit, and an enclosed container accommodating the foregoing elements. The compressor mechanism includes a cylinder block equipped with a compressing chamber and a piston. A shaft directly coupled to the rotor that drives the piston is supported by a double-sided bearing system, namely, a main bearing and a sub bearing. This structure allows preventing the shaft from slanting, and reducing a loss and a noise caused by sliding. As a result, a low profile, highly reliable and efficient compressor is obtainable.

Abstract: An electromagnetic pump comprising an armature comprising a pole portion joined to a plunger portion, wherein the plunger portion comprises a one-piece structure including shaft portions of increasing diameters and a head portion comprising a diameter greater than the shaft portions, the plunger portion and a pole portion located internal to the pump housing for magnetic attraction by an electromagnet means. A retainer element is joined with the plunger portion and a main spring urges on the retainer element to move the plunger thus allowing for a return stoke of the plunger as the pump cycles. Guiding of the armature is performed exclusively by a cooperating relationship between the armature plunger portion and an adjacent portion at the pump housing.

Abstract: A reducing agent pump has a pump inlet part and a pump outlet part closing off the pump body at its ends. One or both of the inlet and outlet parts is of two-part construction, with a closure element and another element. The two elements are prestressed relative to one another with a spring element, so that in the event of a pressure which exceeds the spring force of the spring element, a relative movement can be carried out between the two elements of the two-part member. This makes it possible to absorb an increase in the volume of the reducing agent inside the pump body caused by freezing and therefore to prevent damage to the reducing agent pump.

Abstract: A piston supporting structure for a linear compressor includes a piston reciprocating in the axial direction in response to the driving force of a motor, a first spring of which one end portion is fixed to one side of the piston, and a second spring of which one end portion is fixed to the other side of the piston. The first and second springs elastically supporting the piston reciprocating in response to the driving force of the motor are contracted and relaxed in the axial direction without being displayed in a radial direction, and thereby elastically support the reciprocating movement of the piston, so that the piston can linearly reciprocate in the axial direction in the compressing space of the cylinder. Accordingly, a rotation movement is not applied to the piston, thereby preventing the abrasion of the piston and cylinder and the breakage of parts.

Abstract: The fluid drive unit includes a cylinder communicating with both end portions of a meandering passage formed in the heat transport device. In the cylinder, the piston is slidably arranged being capable of sliding in the axial direction. Fluid is charged in the spaces, which are provided on both sides of the piston, connected to the meandering passage. The solenoid coil, which is provided in the periphery of the side of the cylinder, periodically inverts the magnetic poles and reciprocates the piston in the cylinder. To drive the piston smoothly and reduce the amount of eccentricity, a pair of sliding members are provided at the end portions of the piston. When the fluid in the passage is vibrated by the movement of the piston, the apparent heat conductivity of the heat transport device is enhanced, and heat is quickly diffused from the heating body to the radiating portion.

Abstract: An air compressor includes a machine base, a transmission device, a cylinder, a valve, an automatic pressure-releasing valve and a manual pressure-releasing valve. When a pressure gauge indicates that air pressure is excessive, surplus pressure can be released either by the automatic pressure-releasing valve or by the manual pressure-releasing valve, able to protect the components in the air compressor from damaged and ensure safety of a tire receiving compressed air from the air compressor.

Abstract: A bearing mechanism comprises a shaft rotatably supported by a bearing accommodated in a cylindrical bearing accommodating portion. The shaft is applied with varying load in response to a slidable movement of a pair of pistons so as to be displaced in a direction. The bearing is displaced corresponding to the displacement of the shaft being applied with the varying load. The bearing mechanism further comprises a biasing means. The biasing means biases the bearing to be always in contact with at least a portion of an inner peripheral surface of the cylindrical bearing accommodating portion in the other direction different from the direction in which the bearing is displaced in accordance with the varying load.

Abstract: The invention provides a metering pump having pistons (13, 13′) which lie opposite one another, are guided in cylinders (11, 11′) and are connected to one another by a slide (14) which is moved in a reciprocating manner by a drive motor (201), a switching device (3) being arranged between the pistons (13, 13′) in a valve block (2), which switching device alternately connects the opposite cylinder spaces to a suction opening (4) and a delivery opening (5).

Abstract: A reciprocating piston compressor having a suction muffler and a pair of discharge mufflers to attenuate noise created by the primary pumping frequency in the primary pumping pulse. The suction muffler is disposed along a suction tube extending between the motor cap and the cylinder head of the compressor. The discharge mufflers are positioned in series within the compressor to receive discharge gases from the compression mechanism and are spaced one quarter of a wavelength from each other so as to sequentially diminish the problematic or noisy frequencies created during compressor operation. The motor/compressor assembly including the motor and compression mechanism is mounted to the interior surface of the compressor housing by spring mounts. These mounted are secured to the housing to define the position of the nodes and anti-nodes of the frequency created in the housing to reduce noise produced by natural frequencies during compressor operation.

Abstract: An electro-hydraulic pump assembly for a controlled braking system utilizes an eccentric pump drive apparatus including a pump drive shaft having a first end thereof adapted for attachment of an eccentric, and an eccentric attached to the first end of the pump drive shaft. The pump drive shaft defines a centerline thereof, and a bore extending from a first end of the shaft parallel to and displaced an offset distance from the centerline. The eccentric includes a drive element and a stem extending from the drive element for a press fit into the bore of the shaft. The bore extends into the shaft beyond the end of the stem of the eccentric, forming a void inside the shaft for balancing the shaft so that no counterweights need to be added to the eccentric drive apparatus. The pump drive shaft and eccentric are fabricated from straight-cut cylindrical stock by simple turning, drilling, and cylindrical grinding operations.

Abstract: Apparatus (10) for use with a slurry pump, including a stationary part (12) which includes a processing chamber (13) having an inner side wall (16) and a central axis, an inlet (14) and an outlet (15) to and from the processing chamber (13) and a rotatable part (20) at least partially disposed within the processing chamber (13) and including an outer wall (21) which is spaced from the inner wall (16) of the processing chamber (13).

Abstract: An integrated piston operating assembly for a linear compressor and a method for manufacturing the same are provided. The integrated piston operating assembly includes a piston coupling boss coupled to a piston, a plurality of magnets disposed in a cylindrical arrangement concentric with the piston coupling boss, and a linking member formed of a resin for connecting and thus integrating the piston coupling boss with the plurality of magnets. The magnets and piston coupling boss are secured to the linking member as the linking member is injection molded. By integrating the piston operating assembly of the linear compressor, geometric and assembling tolerances are improved, while deterioration of persistence due to processing and assembling processes is prevented.

Abstract: A pump (10) has a housing which forms a pump chamber (17) having a wall (18). Inlet and outlet valve assemblies (19, 20) communicate with the chamber (17) and, respectively, allow fluid to be received in, and discharged from, the chamber (17). An armature (27) carries a plunger (28) and is reciprocatably moved by an electromagnetic coil assembly (25). A coil spring (44) biases the plunger (28) toward a stop surface (41) positioned adjacent to the plunger (28). Upon activation of the coil assembly (25), the plunger. (28) is moved against the force of the spring (44) such that a diaphragm (31) carried by the plunger (28) moves into the chamber (17) without engaging the wall (18) to discharge fluid through the outlet valve assembly (20). When the coil assembly (25) is deactivated, the spring (44) moves the plunger (28) toward the stop surface (41) without allowing it to engage the stop surface (41) to draw fluid in through the inlet valve assembly (19).

Abstract: An airless spray pump is provided with a single-acting piston pump which allows the use of a low-cost yoke drive. Motor and pump shaft are offset for most efficient force utilization.

Abstract: An electric pumping device includes motor powered by batteries and a eccentric crank is driven by the motor so as to operate a piston assembly. The piston assembly generates pressurized air into the object such as a tire via an outlet. A pressure gauge assembly is connected to a side of the body of the pumping device and includes a gauge member having marks which can be seen via a window so that the user can control precisely the pressure that the pumping device generated.

Abstract: An air compressor for art designing includes a casing and a motor mounted in the casing. A cylinder is secured on a top portion of the casing. The motor is provided to drive a crank that includes a free end having a piston mounted thereon. The piston is reciprocally movably received in the cylinder for compressing air. A partition is longitudinally mounted to the cylinder for airtightly closing the cylinder. A check valve is longitudinally mounted to the partition and extends to communicate with the cylinder to prevent the compressed air from flowing back into the cylinder when the piston is downward moved. A top cover is airtightly mounted to the partition and has a cavity defined to receive the check valve. The compressed air is decompressed in the cavity such that the air compressor can provide a stable air current.

Abstract: A piston pump assembly having a single drive gear assembly associated with two adjacent pump cylinders. Each pump cylinder has a separate valve unit associated therewith. The two pump cylinders have a common piston rod having a pump piston arranged at each end. The piston pod is formed as a toothed rack and the drive gear assembly includes motor-driven gearwheels engaged with the toothed rack.

Abstract: The present invention relates to a motor-pump aggregate with a motor and a piston pump , more particularly for electronically controlled brake systems of motor vehicles, wherein pistons of the pump are drivable by way of an eccentric that is connected to a shaft of the motor and are connected by means of a coupling ring, and wherein the motor has a holding plate. According to the present invention, a projection is provided on the holding plate and extends until into the range of motion of the coupling ring. This provides a stop for the coupling ring, on the one hand, and an improved outlet for leakage fluid of the pump, on the other hand.

Abstract: An air compressor includes a base having an opening to receive a bearing, an eccentric member having a shaft rotatably secured to the base with the bearing and having an eccentric pin, and a cylinder having a piston rod rotatably coupling to the eccentric pin. A gear is attached to the eccentric member and rotated in concert with the eccentric member, and a motor is secured to the base and includes a pinion engaged with the gear to rotate the gear and the eccentric member relative to the base. The gear and the eccentric member may be rotated in great speeds by the motor, and may be stably and smoothly secured to the base with the bearing.

Abstract: A linear compressor is provided in which a driving spring and an elastic supporting member for supporting a compressing mechanism portion are disposed such that a piston and the compressing mechanism portion move in opposite phases such that vibration of a hermetic vessel is canceled out. The linear compressor comprises a hermetic vessel having a compressing mechanism portion and a linear motor therein. The compressing mechanism portion includes a piston-side mechanism and a cylinder-side mechanism, the former includes the piston and the mechanism member which is movable together with the piston, the latter includes the cylinder and the stator which connects with the cylinder. The cylinder-side mechanism member is elastically supported at opposite ends in the hermetic vessel by a first elastic member, and a reciprocating force in the axial direction is given the piston-side mechanism by a second elastic member whose one end is supported by the hermetic vessel.

Abstract: A reciprocating pump which is capable of detecting abnormalities in the sucking and discharging of fluid, such as the exhaustion of oil or the clogging of oil on the discharge side, by making use of detecting means which is inexpensive and relatively simple in structure and which can be operated without being detrimentally influenced by the bubbles that may be included in the fluid, while making it possible to minimize the noise generated by external vibrations. In this reciprocating pump, where the sucking and discharging of fluid are effected by making use of a reciprocating member, malfunction-detecting means formed of a piezoelectric element is provided for detecting a pressure fluctuation on a discharge side of the pump, and the pressure fluctuation of fluid being delivered from an discharging port is transmitted via a rigid pressure-receiving member to the piezoelectric element.

Abstract: A connecting rod apparatus of a compressor for converting a rotation to a reciprocal sliding by connecting an eccentric portion of a crank shaft and a piston. The connecting rod apparatus has: a bush rotatably connected with the eccentric portion, and having a first connecting portion with a pair of sloping sides at an outer circumference, the sloping sides have a predetermined slope in regard to an axis of the eccentric portion; a connecting rod having a small inner diameter for being connected with a piston pin connected with the piston, the small inner diameter is formed at one end of the connecting rod, and a second connecting portion for being connected with the first connecting portion in a direction of the axis along the sloping sides.

Abstract: An acceleration fuel pump for use with a combustion engine carburetor is an integral part of the carburetor body and provides an additional flow of fuel to the fuel-and-air mixing passage of the carburetor during acceleration of the engine. The acceleration fuel pump has a plunger which inserts sealably into a cylindrical cavity carried by the body of the carburetor. During acceleration of the engine, the plunger inserts further into the cavity against the resilient force of a spring and toward a resilient check valve member causing the member to deform into a fuel feed state. A fuel passage which extends between the bottom of a fuel chamber of the carburetor and the fuel-and-air mixing passage of the carburetor is intersected by the cavity and the resilient check valve member.

Abstract: The invention relates to a device for producing consumables, especially filled chocolates that consist of a coated filling. The aim of the invention is to provide a device for feeding substances of the consumables to nozzles in a controlled manner. To this end, the device is provided with pumps that comprise pump pistons in a pump chamber and at least two pump chambers are located in a pump housing one on top of the other.

Abstract: A needle bearing for use in a pump has an inner race, embodied as an eccentric sleeve, needles, and an outer race with rims oriented radially inward on both of its face ends, of which one rim is intended to secure the axial position of the needles and the outer race by engagement with the inner race, in that a rim fits over one end face of the inner race. In the pump unit, the needle bearing is disposed with an axial gap from a roller bearing on a shaft of a drive motor. The rim of the outer race engages this gap.

Abstract: A piston support structure for a reciprocating compressor is provided that includes a piston receiving a linear reciprocating driving power generated by a reciprocating motor. The piston is in a compression space formed in a cylinder and a first resonant spring and a second resonant spring are positioned on both sides of the piston. The first resonant spring and the second resonant spring elastically support the linear reciprocating motion of the piston. The spring constant of the second resonant spring opposite to the first resonant spring is larger than the spring constant of the first resonant spring positioned on the side of the compression space of the cylinder. Accordingly, the stress concentration of the second resonant springs for elastically supporting the piston is reduced. Accordingly, it is possible to prevent the fatigue of the second resonant springs and to extend the durability of the resonant springs.

Abstract: An air pump is provided with a motor body having an air slot to allow air to flow from the air slot to air inlets positioned in a front sealing cap of the motor body. The air inlets are aligned with air holes in a closed housing. A shaft of the motor body extends into the closed housing which houses a piston. The shaft of the motor body is connected to gearing mechanisms in the closed housing to provide reciprocating motion of the piston. The piston includes an air inlet and a valve. The reciprocating movement of the piston causes air to travel through the piston into a cylinder above the piston. The design of the pump affords a cooling function to both the motor body and cylinder while reducing the noise of the pump.

Abstract: An oil supply apparatus for a hermetic compressor includes: a crank shaft connected to a rotor of a driving motor so as to be rotated together with the rotor, and having an oil flow path therein; a sleeve connected at a lower end of the crank shaft so as to be rotated integrally together with the crank shaft; a sucking member disposed to maintain a certain gap against an inner circumferential face of the sleeve and sucking oil; and a support bracket installed between support springs installed between a bottom surface of a hermetic container and a stator of the driving motor so that the sucking member can be maintained in a suspended state inside the sleeve, and the sucking member. Since the plurality of legs are fixed as the seat cap is mounted between the support springs, the assembly of the sleeve and the sucking member can be simply assembled in a state that the motor and the compressing unit are already assembled.

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 joint structure for a refrigerant discharge tube of a hermetic reciprocal compressor having a connecting member fit around the refrigerant discharge tube, the connecting member having a shape corresponding to a connecting hole in a cylinder block, thereby allowing the connecting member to be press-caulked. The refrigerant discharge tube is directly connected to the cylinder block. The connecting hole is multi-layered and may be formed into at least two steps. The connecting member is pre-assembled in the connecting hole by transition-fitting. Accordingly, as the connecting member is press-fit in the connecting hole by a caulking-jig, the connecting member is expanded, and the connecting member is more securely fit in the connecting hole. Further, a thread portion having a pitch in a range of 2 to 5 threads is formed on an inner circumference of the connecting hole.

Abstract: In a hermetic compressor for use on an air-conditioning unit as well as a refrigerating unit such as a refrigerator and a showcase, there is disclosed a constitution designed to provide a silently operated hermetic compressor that has an intake muffler readily assembled thereon. The hermetic compressor including a substantially disk-like elastic member disposed between the intake muffler at an outlet thereof and a cylinder head is provided, in which an outlet orifice of the intake muffler constantly remains pressed against an intake valve port through a gasket.

Abstract: A lubricant pump having a housing equipped with outlets and a lubricant chamber, and having a piston axially displaceable in an axial cylinder bore in the housing by means of an electrical drive arrangement. The piston is at a first end and has an axial outlet. A first portion of the axial outlet is connected to a through-opening arranged radially on the piston position and adapted in a predetermined piston position to connect the axial outlet to a predetermined outlet of the outlets. A second portion of the axial outlet of the piston is connected to the lubricant chamber by way of an inlet and a non-return valve to allow the bore to be filled with lubricant. The outlets are arranged essentially in succession to one another. The position sensor is adapted to signal the position of the piston in the event the piston stops.