Abstract: An oil pump for a reciprocating hermetic compressor comprising a pump body (11), having a free end (12) immersed in the oil, and an opposite end (13) coupled to the compressor, so as to be driven by the latter in a reciprocating axial movement, said pump body (11) defining at the free end (12) thereof a valve seat (15), and further lodging a sealing means (20), which is displaced between a closing position, seated on said valve seat (15), and an opening position, spaced from said valve seat (15), said positions resulting from the displacements of approximation and spacing of the pump body (11) in relation to the sealing means (20) therewithin.

Abstract: A pump housing (14, 16) has a fan guard (40) secured to the end of the housing by four crescent-shaped tabs (60) fitting into four crescent-shaped cast-in recesses (66) of the housing (14, 16) and ears (68) of the tabs (60) fitting into cast-in holes (70) in the housing (14, 16). The ears (68) and boles (70) on opposite sides of the housing (14, 16) are aligned along a common axis (80, 82). The ears (68) are tapered at their leading ends (90) and squared off at their trailing ends (92), and the guard (40) has a radial projection (56) that fits into an opening in the housing (14, 16).

Abstract: A fuel injection pump system specifically designed to provide a variety of fuels, including aviation kerosene-jet fuel, arctic fuels and diesel fuels to a single cylinder compression ignited engine using a single bore fuel injection pump and governor in a single housing. The fuel injection pump system includes a housing enclosing a fuel injection pump with governor system which is attached directly to the engine casing. thereby using the engine's oil for lubrication of the fuel injection pump. The internally attached governor system enables the engine to idle smoothly at a predetermined speed and also provide high-speed protection by reducing fuel at predetermined RPM settings. A uniquely designed plunger and barrel in the fuel injection pump incorporates an anti-knock helix shaped plunger that changes the idle injection timing for sound attenuation.

Abstract: The present invention provides an externally mounted assembly for supporting a rotatable shaft member driven by an electric motor. The externally mounted assembly comprises an annularly projected bearing support member disposed on a substantially vertical plane and a bearing member mounted on the bearing support member. Such bearing member is connectable with the rotatable shaft member for supporting such rotatable shaft member thereby reducing extraneous vertical and horizontal movement of such rotatable shaft member while permitting such rotatable shaft member to rotate freely.

Abstract: An improved structure of an air inflation device is disclosed. External air is drawn to the motor and cylinder to provide rapid cooling so that the efficiency of the motor is maintained. In the present invention, a plurality of air filters is used to filter air. Thereby the air inflation device is useful and practical.

Abstract: A screw compressor includes a compressor main body, a male rotor having a screw-like male tooth shape and a female rotor having a screw-like female tooth shape meshing with the screw-like male tooth shape or the male rotor. The male and female motors are provided within the compressor main body. A motor casing is operably connected to the compressor main body, and a high speed electric motor provided within the motor casing. The motor includes a motor rotor, a motor stator and a motor shaft for driving at least one of the male and female rotors. A speed ratio of the motor shaft and the at least one of the male and female rotors driven by the motor shaft is in a range of 2:1 to 1:2.

Abstract: A sealed electric compressor for use in, for example, an electric refrigerator, generates a little noise and can feed any moving part of its compressing element with refrigerator lubricant. An oil pickup tube is joined by insertion to the lowermost end of a crank shaft and includes a first centrifugal pumping portion and a second centrifugal pumping portion provided continuously and arranged at a smaller angle than that of the first centrifugal pumping portion. The second centrifugal pumping portion arranged at a smaller angle can spin in a pool of the refrigerator lubricant.

Abstract: A hydraulic pump with a built-in electric motor wherein an electric motor and a pump unit are arranged in tandem fashion and accommodated within a common housing. In this pump, the housing is in the form of a metal box having a rectangular parallelepiped external shape and forms an electric motor frame fixedly accommodating a stator of the electric motor therein. A space in the metal box on the electric motor side is separated as a dry space from an internal space of said pump unit by a seal mechanism. At least one hydraulic oil receiving chamber is formed in a peripheral wall of the metal box, and the hydraulic oil receiving chamber is communicated with a passage for receiving return oil externally and another passage communicating with a suction port of the pump unit.

Abstract: A fluid machinery comprises a helical mechanism provided with a cylinder, a roller eccentrically disposed inside the cylinder and formed with a helical groove and a blade member fitted in the helical groove, an electric motor unit connected to the helical mechanism through a rotational shaft, the roller, which eccentrically rotates, having an engagement portion engaged with a crank portion of the rotational shaft, and a pair of bearings disposed to both axial end portions of the cylinder so as to support the rotational shaft. The engagement portion of the roller and the bearings are formed with through holes for ventilation, respectively.

Abstract: The present invention comprises a pump (10, 110) having a casing (14, 114) with at least one first hermetically sealed chamber (19, 119) and at least one second chamber (17, 117) adjacent to said first chamber, defining a passageway (18, 118) for fluids and having an inlet (15, 115) and an outlet (16, 116) for the fluids. The stator (12, 112) is provided in this first chamber (19, 119). In addition, a rotor-turbine assembly (11, 111) is induced by the stator (12, 112) to drive a fluid from the inlet (15, 115) to the outlet (16, 116), the rotor and the turbine being integral and wholly located in the second chamber (17, 117). In a preferred embodiment, a fluid course between the opening of outlet (115) and fluid passage (118), in portion (119a) of first chamber (119), is provided with filtration zone (120) suitable for filtration of a fluid to be impelled by the pump.

Abstract: A multi-stage centrifugal compressor with an integral high-speed motor for compressing air has a variable speed permanent magnet motor having electronically commutated stator coils surrounding a rotor carrying permanent magnets, wherein there is a gap between the coils and the rotor. The rotor has a magnetic steel rotor shaft rotatably supported at each end by pressurized oil lubricated hydrodynamic bearings. The stator coils have a plurality of stator wires extending longitudinally along the stator and continuing around the ends of the stator to define end turns. The compressor also has a plurality of compressor impellers mounted to turn with the rotor shaft and cooler for cooling the bearings, rotor and stator coils comprising a pump for introducing cooled oil into the bearings, said bearing configured so that oil exiting from the bearings splashes over the supported ends of the shaft and splashes over the end turns of the stator coils.

Abstract: The object of the present invention is to offer an electric type swash plate compressor which is compact and reduced in weight and lightened, and which can efficiently cool down a motor chamber and a crank chamber. The compressor has an electric motor and a swash plate, which are respectively accommodated in the motor chamber and the crank chamber. In the compressor a communication route, which communicates a part except the discharge chamber communicating with an external refrigerant circuit in an inner refrigerant circuit within an outer casing with the motor chamber, is formed. The communication route is formed so as to pass through the crank chamber, and the refrigerant in lower temperature and lower pressure than discharge refrigerant is supplied into the motor chamber and the crank chamber. Accordingly, the improvement of cooling efficiency and the reduction of pressure resisting strength of the casing can be performed.

Abstract: A motor pump aggregate M has a housing 1 defining an oil reservoir with first and second chambers R1, R2. An electromotor 2 is driving via its motor shaft W at least one radial piston pump arrangement P1 provided within said first chamber R2. Both chambers R1, R2 are separated by a separation wall 7. A filling and pressure biasing system V is provided for said first chamber R1 in order to adjust within said first chamber R1 a predetermined oil filling level and a pre-selected oil pressure pre-biasing for said radial piston pump arrangement P1.

Abstract: The scroll-type compressor with an integrated motor of the present invention comprises a housing 1, a fixed scroll 21 fixed to the housing 1, a movable scroll 31 installed eccentrically to the fixed scroll 21, and a motor portion 5, and is characterized in that the housing 1 comprises a high pressure chamber 25 to which compressed gases are supplied, a first cooling chamber 26′ installed contiguous to the high pressure chamber 25 and to which cooling fluid is supplied, a second cooling chamber 42 which cools the motor portion 5 and is supplied with the cooling fluid, and a fluid passage 7 that connects the first cooling chamber 26′ and the second cooling chamber 42 and passes the cooling fluid in the direction from the first cooling chamber 26′ to the second cooling chamber 42.

Abstract: A vacuum cleaner having a main body and a handle, the main body being formed with a nozzle which delivers a stream of dirt-laden air through a dirt duct through a motor-fan inlet, the handle being supported on the motor-fan assembly and housing a filter bag which communicates with the motor-fan assembly for receiving the dirt-laden air, the motor-fan assembly having a motor housing, a motor with commutated brushes which give off carbon dust particles, a motor cooling fan for drawing a cooling airstream and a working fan for drawing the dirt-laden air, the vacuum comprising: an opening formed in the motor housing for receiving the cooling airstream; a cooling outlet formed in the motor housing through which the cooling airstream exists; means for directing the existing cooling airstream into the dirt-laden air; a collar extending axially outwardly from the motor housing, the collar allowing pivotal rotation of the motor housing relative to the main body.

Abstract: Disclosed herein is an oilless air compressor having a cooling system with a drive unit operating a crankshaft disposed within a crankcase and to which is attached a pair of pistons movable within corresponding compression cylinders. A blower wheel is concentrically mounted to the crankshaft adjacent the exterior of the crankcase. Each compression cylinder includes a thermally conductive cylinder insert which a bore in which the corresponding piston rides. A thermally conductive heat sink having a plurality of annular cooling fins is cast integrally to the outer diameter of each cylinder insert and connected to the crankcase such that the compression cylinders and the crankcase are completely enclosed. Each cylinder insert is made of an aluminum alloy, preferably having a low silicon content and a high melting point so that it can be insert cast within the cooling fin and anodized without degrading the surface finish of its inner bore.

Abstract: An oil free screw compressor includes a compressor main body directly connected to a high speed motor via a drive side gear and a driven side gear having a uniform speed ratio. A bearing in a side of the high speed motor employs one having the same size as that of a bearing in a side of the compressor main body. The same material as a viscous seal provided at both end portions of a male rotor and a female rotor is used for a viscous seal provided at both end portions of a motor shaft. The high speed motor is driven by a high frequency type inverter. The electric motor side and the compressor main body side are made in a rotational shaft structure which is dummy symmetrical about a uniform gear portion.

Abstract: A hermetic motor compressor unit for household and similar refrigeration appliances, comprising a sealed casing having a bottom that forms a sump for holding lubricating oil. Inside of the casing is a compressor and driving motor that share a common hollow crankshaft that rotates about a vertical axis. To ensure effective lubricating oil flow into the hollow crankshaft, a means for providing suction comprising a sleeve is rigidly fixed to the lower end portion of the crankshaft. A fluted member made of a material with a lower thermal conductivity than the material from which the hollow crankshaft is made that is connected to the stator of the drive motor is inserted into the sleeve to draw the lubricating oil from the sump. The lubricating oil is drawn in from the oil sump into recesses in the fluted member when the sleeve is rotated into the position in which it allows the recesses to communicate with lower apertures in the sleeve. This occurs during the downstroke of the fluted member.

Abstract: The present invention provides an assembly for supporting a rotatable shaft member driven by a motor. The assembly comprises a base member, an upright support member connected to the base member and a bearing member mounted on the upright support member Such bearing member is connectable with the rotatable shaft member for supporting such rotatable shaft member thereby reducing extraneous vertical and horizontal movement of such rotatable shaft member while permitting such rotatable shaft member to rotate freely.

Abstract: The inlet bearings of a screw machine, such as a refrigerant compressor, are both lubricated and cooled by a portion of the motor cooling and suction flow which has lubricant entrained therein and which is drawn through the inlet bearings into the coacting pair(s) of screw rotors.

Abstract: An oil supply unit of a linear compressor including: a well-closed container filled with oil; a frame installed within the well-closed container; a cylinder fixed at the frame; a piston inserted, in the cylinder and being linearly and reciprocally moved by a linear motor; an oil cylinder fixed at the lower portion of the frame so as to be put in the oil filling the well-closed container, and being vibrated in the horizontal direction according to the reciprocal movement of the piston; an oil piston inserted in the oil cylinder in a manner of dividing the inside of the oil cylinder to a suction space and a discharge space that are communicated to each other, and being vibrated in the horizontal direction; an oil suction installed at the outer side of the suction side of the oil cylinder, for opening and closing the suction side of the oil cylinder; an oil discharge valve installed at the outer side of the discharging side of the oil cylinder, for opening and closing the discharging side of the oil cylinder; an

Abstract: A drive unit for hydraulic consumers for individual structural component parts of a machine for producing shaped articles from molding materials, including a motor, a pump driven by the motor, and a carrying part configured to connect at least one of the pump and the motor to the machine. The carrying part has a pipe-shaped area which is closed at both ends by at least one of a bottom and a cover. At least the pump projects into the carrying part and is enclosed by the carrying part. The pump is attached to the carrying part on a side facing away from the motor. A portion of the carrying part is constructed as a connection block.

Abstract: A pump assembly flows pressurized engine oil to HEUI fuel injectors in a diesel engine. The assembly includes an inlet throttle valve which controls the volume of oil flowed to the pump dependent upon the difference between the pump outlet pressure and a desired outlet pressure determined by an electronic control module for the diesel engine. The assembly also includes a crank shaft with an interior drain passage.

Abstract: A turbocompressor (1) has an outwardly gas-tight housing (6) within which an electric motor (2) and a multistage radial turbocompressor (3) are arranged on a common shaft (13). For journalling the shaft (13), electromagnetic radial bearings (5) are arranged spaced apart in the direction of the shaft. A gas seal (19) surrounding the shaft (13) is arranged between the electric motor (2) and the radial turbocompressor (3) in order to seal off the electric motor (2) with respect to the radial turbocompressor (3). The electric motor (2) has an inner space (9b, 9c) which is connected in a fluid-conducting manner to an outlet opening (6h; 21) which passes through the housing.

Abstract: In a scroll compressor with an electric motor incorporated of the present invention, a housing is provided with a cooling chamber which is provided adjacently on the outer peripheral side of a motor portion, so that cooling fluid is supplied to the cooling chamber, and a high pressure chamber which is provided adjacently on the outer peripheral side of the cooling chamber so that a gas, compressed by a fixed scroll and a movable scroll, is supplied to the high pressure chamber. Consequently, reduction in the mass flow rate of the discharge gas of the compressor can be suppressed, and it is possible to cool both the discharge gas and the motor portion by the single cooling chamber.

Abstract: Compressors with two cylinders in a horizontally opposed arrangement are known. The compressor according to the invention has a vertically aligned crankshaft. The electric drive motor is arranged underneath the cylinders and provided with a radial fan. The cooling air flows upwards along the drive motor and along the cylinders.

Abstract: The rotary piston machine with an axial direction of delivery from the top downwards, in particular of screw spindle-type construction, with cooling ducts (12) for the motors (8), bearings (7) and sensors (9), through which ducts a cooling fluid flows, and with a cooling device for the pump space (3) is characterized in that the casing (2) of the pump space (3) has a closed annular space (15) which is partially filled with a liquid, which is cooled by the cooling fluid via heat exchanger surfaces (18).

Abstract: A device for the external cooling of the electrical drive motor of a centrifugal pump unit, which with the motor is advantageously to be assembled above the centrifugal pump, comprises a hermetically closed hollow body of heat-conducting material which circumferentially at least partly surrounds the motor and which with its wall surface on the motor side and on the pump side is in heat-conducting surface contact with the motor and the centrifugal pump, wherein the hollow body is essentially filled with a fluid which transfers the motor heat and which, with a heated motor, is subject to a natural circular convection flow.

Abstract: A method and system for fully evacuating refrigerant from storage devices, appliances, and refrigerant systems. An evacuation system is provided with a vacuum pump including a housing containing an electric motor positioned with its stator in heat conductive contact with the inner surfaces of the housing. The electric motor is used to drive a rotating-vane, rotary compressor that provides positive displacement suction on the device being evacuated of refrigerant. The vacuum pump further includes an external cooling system positioned about the housing to dissipate heat that builds up within the housing during periods of low refrigerant flow. The external cooling system includes tubular fins contained within a shell and held in abutting contact with an outer surface of the housing and a fan for forcing cooling air flow over and through the fins.

Abstract: An electric blower comprises a motor unit having a stator and a rotor, a fan unit having an impeller attached to an output shaft of the rotor, and a circuit unit having a heat-generating component for controlling electric power to the motor unit. The circuit unit is disposed in an airflow path of air expelled from an outer periphery of the impeller toward the stator and the rotor of the motor unit. The air suctioned by rotation of the impeller cools the heat-generating component in the circuit unit before cooling the stator and the rotor.

Abstract: A motor pump aggregate M has a housing 1 defining an oil reservoir with first and second chambers R1, R2. An electromotor 2 is driving via its motor shaft W at least one radial piston pump arrangement P1 provided within said first chamber R2. Both chambers R1, R2 are separated by a separation wall 7. A filling and pressure biasing system V is provided for said first chamber R1 in order to adjust within said first chamber R1 a predetermined oil filling level and a pre-selected oil pressure pre-biasing for said radial piston pump arrangement P1.

Abstract: A cooling apparatus, for cooling a vacuum pump, in which a cooler 44 is arranged on a rotor housing 12, a cooler 45 is arranged on a rear housing 14 and a drive unit 33, a cooler 46 is arranged on a controller 37, a cooler 47 is arranged on an inverter 38, and a cooler 48 is mounted on the peripheral surface of an electric motor M is disclosed. The coolers 46, 47, 48 are arranged midway in a main supply pipe 49. The coolers 44, 45, on the other hand, are arranged midway in a subsidiary supply pipe 50. The energization and deenergization of an electromagnetic three-way valve 51 arranged at the diverging point of the main supply pipe 49 and the subsidiary supply pipe 50 is controlled by the controller 37.

Abstract: A fluid cooling device in the form of a modular unit has a motor which drives a ventilator wheel and a hydraulic pump which takes fluid from an oil reservoir and delivers it to a hydraulic work circuit. The circuit heats the fluid and sends it to a heat exchanger from which the fluid returns, cooled, to the oil reservoir. The oil reservoir, being shaped like a trough and surrounding at least part of the motor and the hydraulic pump and having high walls in the manner of a half-shell, results in a relatively high-volume oil reservoir with is a part of the fluid cooling device with a compact, space-saving structure by at least partially containing parts of the fluid cooling device to save space.

Abstract: An oil free screw compressor includes a compressor main body directly connected to a high speed motor via a drive side gear and a driven side gear having a uniform speed ratio. A bearing in a side of the high speed motor employs one having the same size as that of a bearing in a side of the compressor main body. The same material as a viscous seal provided at both end portions of a male rotor and a female rotor is used for a viscous seal provided at both end portions of a motor shaft. The high speed motor is driven by a high frequency type inverter. The electric motor side and the compressor main body side are made in a rotational shaft structure which is dummy symmetrical about a uniform gear portion.

Abstract: A process and system for generating and delivering high-pressure fuel to a high-pressure storage chamber of a fuel injection system of an internal combustion engine. The system includes a low-pressure pump as a pre-feed pump by which fuel is supplied from a tank and is delivered to the intake side of a high-pressure pump and a part of the fuel delivered by the low-pressure pump is used to lubricate the high-pressure pump. In order to reduce the temperature level in the return and to increase the overall efficiency of the motor, the system is embodied so that the delivery quantity of the low-pressure pump or the delivery pressure on the delivery side of the low-pressure pump is controlled as a function of the currently required fuel quantity determined by sensors and a control device.

Abstract: A cooling fan is fitted to one of the shaft end portions of a double-end motor, and a pulley is fitted to the other end portion. A belt is passed around this pulley and a pulley fitted to a compressor element, and the compressor element is driven by this belt. The compressor element is disposed in such a manner as to be stacked up in an upward direction of the motor. An exhaust duct having a built-in cooler is also disposed in such a manner as to be stacked up above a cooling fan on the discharge side of the cooling fan. A main duct is formed on the suction side of the cooling fan and is interconnected in series with a cooling air outlet of the compressor element. These members described above are accommodated inside a casing. Therefore, two cooling air flow passages are defined on the right and left sides inside the casing.

Abstract: In order to maintain high efficiency close, to isothermy despite high frequencies in a pneumo-hydraulic converter with reciprocating pistons, pipe cluster-heat exchange pipes (38) are provided in the gas working chambers of the converter and the exchange fluid in the pipes is kept at approximately ambient temperature. For this the gas working chambers must be arranged axially next to one another and, in order to eliminate dead space, connected in pairs by conical exchange valves (12a/12b) which take in the entire wall thickness of the valve flange (5a/5b) dividing the air chambers.

Abstract: A motor-driven compressor unit (12) suspended in a hermetic housing (10) comprises a casing (24) which encloses the stator (16) of the electric motor externally and to which the stator is fixed. The casing (24) carries and is fixed firmly to a block (36) of the compressor and further comprises a transverse wall (28) situated at the opposite end to the block. The block (36) and the transverse wall (28) have respective annular seats (56, 60) concentric with the axis of rotation of the crankshaft (46). The annular seat (56) in the block (36) contains a main self-aligning bearing (86) and the annular seat (60) in the transverse wall (28) of the casing (24) contains a secondary self-aligning bearing (64).

Abstract: A safety pumping system including a pump (19) and an electric motor (15) is adapted to be immersed in a fluid (11) contained in a tank (10). The electric motor and the pump are interconnected by a driving shaft (23). The electric motor is enclosed in a motor housing, which defines an inner space (18). The motor housing is surrounded by an outer shell or jacket (14), which defines an outer space (17) between the outer shell and the motor housing. In order to reduce the risk of explosions when the pumping system is immersed in an inflammable liquid, protective gas, such as nitrogen, at a superatmospheric pressure is supplied to the inner space (18) of the motor housing (15). Protective gas is also supplied to the outer space (17) defined by the outer shell of jacket (14). The gas pressure within the inner space (18) preferably exceeds the gas pressure within the outer space (17), which preferably exceeds the atmospheric pressure.

Abstract: A motor assembly is disclosed in which a motor is rotationally connected to an impeller for producing a fluid flow, preferably an air flow. A venturi passage is provided for conducting a high velocity air jet from the air flow. A baffle is configured to the venturi passage to draw an air wash over the motor to provide cooling, without a separate cooling fan.

Abstract: A compressor has a piston attached to an eccentric part of a rotary shaft for being reciprocated to compress refrigerant. In order to provide lubricating oil to the shaft, an oil paddle is mounted in a hole of the eccentric part for pumping oil from the bottom of the compressor. The paddle includes a longitudinally extending gap rendering the paddle flexible so that either end thereof can be mounted in the hole. The paddle also includes slots formed in upper and lower ends of the paddle, respectively, in diametrically opposing relationship to the gap. The lower slot is submersed in the oil to reduce the amount of oil that is pumped and thereby reducing generated noise.

Abstract: An air conditioning equipment is provided with an oil level equalizing system, which includes a plurality of low-pressure shell-type compressors communicating with a suction line through a plurality of branch portions, a plurality of connecting lines each communicating with a corresponding compressor shell at a location adjacent to a normal oil level in the shell, and an oil level equalizing line communicating with the plurality of connecting lines. The oil level equalizing system also includes a communication line, through which the suction line communicates with the oil level equalizing line at a location upstream of the plurality of branch portions with respect to a direction of flow of a refrigerant. This arrangement functions to increase the pressure within the oil level equalizing line to a value higher than that within the shell of each compressor.

Abstract: A multicylinder downhole reciprocating plunger pump includes a crankshaft supported on a frame for rotation about an axis generally parallel with the wellbore axis by a submersible electric motor or by a rotary drive rod extending within the well conduit connected to the pump. The pump frame includes spaced apart frame members which support a tubular discharge manifold which supports each cylinder for oscillatory movement in response to rotation of the crankshaft and respective plungers connected to respective crankthrows. Fluid inlet valves are mounted in the plungers and receive inlet fluid through respective crankshaft bearings for each plunger. Fluid discharge valves are retained in respective cylinder head portions by a removable tubular retainer members. Each cylinder includes a liner sleeve with a seal lip biased into engagement with the plunger by a garter spring member.

Abstract: An oilless gas compressor includes a motor containment vessel containing a motor for driving the compressor and a crankcase attached to the motor containment vessel. The crankcase and the motor containment vessel are fluidly connected and together define a sealed, pressurizable interior cavity in which the rotatable motor shaft is disposed. The compressor further includes a cylinder mounted upon the crankcase, the cylinder having a piston disposed therein. The piston is connected to the shaft for reciprocation of the piston within the cylinder. The cylinder also includes a gas intake valve, fluidly connected to the compressor suction inlet port, and a gas discharge valve, fluidly connected to the compressor discharge outlet port. The oilless gas compressor, in which the need for perimeter rotating shaft seals is obviated, is suitable for compression of precious or toxic gases or flammable gases, such as natural gas.

Abstract: A heat exchange jacket for attachment to an external surface of a pump motor having a bottom surface with a shape conforming to a curvature of the housing of the pump motor, a top surface joined to the bottom surface so as to define a heat exchange chamber therebetween, a fluid inlet connected to the top surface and communicating with the chamber, and a fluid outlet communicating with the chamber. The surface of the heat exchange jacket are formed of a polymeric material. The fluid outlet is positioned below the fluid inlet. The bottom surface has a curved shape with the top surface extending in concentric relationship therewith. The fluid inlet is positioned above the top surface and is located between a forward end and a rearward end of the top surface. The fluid outlet includes a first fluid outlet located on one side adjacent to the bottom of the heat exchange jacket and a second fluid outlet positioned on an opposite side of the heat exchange jacket adjacent to a bottom of the jacket.

Abstract: A seamless pump is disclosed which includes a pump casing that houses a stator and a rotor. The stator and rotor provide enhanced pumping action in the seamless pump. The stator surrounds at least a portion of the rotor. A rotatable housing surrounds at least a portion of the pump casing and is operatively connected to the motor. A plurality of first magnets are located about an interior surface of the housing and are rotatable therewithin and a plurality of second magnets are operatively connected to and rotatable with the impeller. A seal isolates the second magnets from material being pumped by the pump. A cooling jacket may be used to cool the pump.

Abstract: A hydraulic axial piston machine, such as a high-pressure water discharge pump, may include a first subassembly having a plurality of cylinder-piston units arranged at a distance from, and either parallel to or at an acute angle to, a central axis. The cylinder-piston units may be circumferentially offset, relative to each other, around the central axis by a predetermined angle. The hydraulic axial discharge pump may also include a second subassembly which may be coaxially positioned and arranged for rotation around the central axis on a drive shaft and which may have a force-transmitting connection with the cylinder-piston units to receive oscillating drive forces of the cylinder-piston units. The drive shaft, which may include at least two rotationally coupled longitudinal sections, may extend coaxially to the central axis from its drive input end through at least one of a corresponding central opening of the first subassembly and of the housing to a head-subassembly.

Abstract: Pumps, for example, bilge pumps, comprise a pump housing including an inlet and an outlet, a motor and an impeller assembly coupled to the motor for pumping liquid which passes through the outlet. The motor is advantageously cooled by pumped liquid while being protected from the pumped liquid. Further, the motor is turned on and off in response to actual operating conditions, thereby increasing pump life and reducing overall power consumption. The pump provides contoured facing surfaces which provide a dynamically efficient flow path for the pumped liquid. In addition, a switch housing is preferably provided to allow liquid to contact an activator assembly which turns the motor on.

Abstract: An improved oil supplying apparatus for a hermetic type compressor capable of preventing a burr formation due to scratches caused between an outer sharp edge portion of a propeller and the inner surface of a casing when the propeller is inserted into the casing by providing protrusions at both ends of upper and intermediate support blades of the propeller, which includes a crank shaft having an outer guide groove formed on an outer surface thereof and an inner guide groove formed on an inner portion thereof; a casing connected to the lower portion of a lower portion of the inner guide groove of the crank shaft; and an oil supplying unit having an oil supplying unit, a supporting unit, and a scratch prevention unit, the oil supplying unit, the supporting unit, and the scratch prevention unit being disposed within the casing.

Abstract: A refrigeration motor compressor assembly has a housing including a lubricant sump in the bottom thereof into which the lower end of the drive shaft and associated rotor extend. A shield is provided which is positioned by the drive shaft and extends above the oil level in the sump in surrounding spaced relationship to the lower end of the rotor. As the rotor rotates within the shield, lubricant contained therein is thrown out of the surrounding shield and a close fit between the shield and the shaft restricts return flow of lubricant into the area occupied by the rotating rotor.