Abstract: A refrigerant passage within a main shaft includes an axial refrigerant passage extending in parallel with the main shaft from the end surface thereof, and a radial refrigerant passage communicating with the axial refrigerant passage and extending radially outwardly. The radial refrigerant passage is located between the end surface of the main shaft and a motor rotor. Thus, when the main shaft rotates, suctioned refrigerant is uniformly sprayed toward an entire coil. Further, the refrigerant flows toward a compression mechanism through the electric motor, thereby cooling the electric motor effectively.

Abstract: An improved compressor incorporates structure for facilitating the alignment of a suction tube with the motor stator windings. In one embodiment, the motor stator is provided with a protective coating such that the refrigerant entering the compressor housing through the suction tube does not damage the motor windings. In another feature, the chamber housing is bumped out in the location where the suction tube is mounted such that the distance between the radially inner end of the suction tube and the radially outer portion of the windings is increased. The above provides better protection for the motor windings in a sealed compressor wherein the suction tube is axially aligned with the motor windings.

Abstract: A pump system for a helicopter tanker includes an axial flow electric pump coupled to a lower end of a snorkel having a generally tubular pump housing extending along a central axis between an open upper end and an opposite open lower end serving as an inlet of the pump. An in-line electric motor is supported within the housing along the axis and has an output drive shaft mounting an impeller. A filter screen basket is mounted on the lower end of the housing to filter water for filtering the incoming water. An electric power cable extends from the motor through a the housing and is shrouded externally by a protective metal cable guard.

Abstract: The present invention is to offer a scroll fluid machine of which the scroll machine proper is cooled sufficiently and effectively and characterized in that, a tubular jacket 26 is provided, said tubular jacket surrounds the outer circumferential surface of a motor 15(motor housing 13) keeping some distance from said surface and has an annular opening 17a on said motor facing to said scroll machine proper side, from which opening cooling gas induced by a cooling fan 16 is taken in, and a passage 19 connecting to the cooling space 17 formed by said outer circumferential surface of the motor and said tubular jacket is provided to guide and introduce said taken-in cooling gas to said scroll machine proper in the direction crossing the longitudinal direction of the rotation shaft of said motor. Thus, the back side of the scroll disk of said scroll machine proper is cooled by the cooling gas flowing in one direction behind the scroll disk.

Abstract: A compact, lightweight electric motor driven compressor suitable for an air conditioning system using a CO2 refrigerant is disclosed. The thickness of a motor casing is reduced by using the gaps formed in the motor portion in a motor casing as a part of a low-pressure intake chamber, while forming a part of the discharge chamber by utilizing the annular gap between the inner surface of a pump casing and the outer surface of a compressor portion. In the case where CO2 refrigerant is used, the compressor portion can be reduced in size and therefore a dead space is generated due to the difference in size with the motor casing. Since this dead space is used as a discharge chamber, the capacity of the discharge chamber can be increased to suppress the discharge pulsation.

Abstract: A hermetic compressor assembly having a housing and a pair of spaced apart main bearings, disposed within the housing, which subdivide the housing into first and second discharge chambers, and a suction chamber. The suction chamber is disposed between the pair of main bearings and first and second compressor mechanisms are disposed, respectively, in the discharge chambers. Each compressor mechanism has an outboard bearing, a cylinder block, which is disposed between the outboard and main bearings and defining a cylindrical cavity, a roller piston in the cylindrical cavity and a vane supported in the cylinder block and rotationally engaging the roller piston. At least one discharge opening is in fluid communication with the respective discharge chamber and a drive motor is disposed in the suction chamber. A drive shaft drivingly connects each roller piston to the motor. A suction port is disposed within at least one of the compressor mechanisms and extends through the respective main bearing.

Abstract: A turbo compressor is disclosed. The compressor includes a hermetically sealed shell, a motor chamber formed at a center portion of the shell, a driving motor installed in the motor chamber, a driving shaft engaged with the driving motor having its one end inserted into a first compression chamber and its other end inserted into a second compression chamber with said first and second compression chambers being formed at both sides of the shell, first and second impellers disposed in the first and second compression chambers in a face-to-face form and rotatably engaged with both ends of the driving shaft, and a gas flow path through which a refrigerant gas is sucked for thereby first compressing the gas in the first compression chamber and discharging to the second compression chamber for thereby implementing a small size compressor, decreasing the number of parts and increasing a compression efficiency.

Abstract: A motor-driven compressor-electronic motor power package assembly places temperature-sensitive components of the electric motor or the electronic power package for the electric motor, or both, in heat transfer relationship with the flow of compressed air from the compressor.

Abstract: An adjustable shroud arrangement is disclosed for a submergible pumping system. The pumping system is of the type used to raise fluids from wells, such as petroleum production wells. The systems include a plurality of interconnected components, including a motor and a pump driven by the motor. The systems may also include a separator for separating production fluids from non-production fluids. The shroud serves to transfer fluids between system components, such as around the motor to promote convective cooling of the motor during operation. The shroud fits around a portion of the pumping unit to define a fluid flow path. The shroud is adjustable with respect to the pumping unit to permit relative thermal expansion and contraction of the shroud and the pumping unit components. In a preferred embodiment, the shroud has one end fixed to the pumping unit and a second end slidingly seals against a component of the pumping unit.

Abstract: An apparatus having a refrigeration cycle using a flammable refrigerant, comprises an oil-free compressor, a condenser, an expansion device and an evaporator, wherein an amount of lubricant in the oil-free compressor is equal to or smaller than 3 cc. With this structure, the charging amount of the flammable refrigerant into the refrigeration cycle can be reduced, and the safety of the apparatus having a refrigeration cycle can be enhanced.

Abstract: There is provided a refrigerant compressor capable of satisfactorily ensuring a motor cooling effect, reducing inlet pressure loss and preventing the possible occurrence of dilution of oil when liquid refrigerant flows back, thereby allowing an improved lubrication. A partition is provided between an oil reservoir and a motor. The partition defines an upwardly opened type inhaled refrigerant pool for reserving liquid refrigerant inhaled from a suction pipe around the motor.

Abstract: A hydraulic power unit for an auto-hoist lift having improved noise characteristics and a more compact design. A motor and pump driving the power unit are located inside a hydraulic fluid reservoir to thereby reduce the amount of noise reaching the immediate vicinity of the power unit. The motor and pump are submerged in the hydraulic fluid to advantageously utilize the hydraulic fluid to cool the motor. The power unit may further incorporate a delay valve for reducing the start-up torque load on the motor, thereby allowing the motor to be sized for normal operating requirements rather than oversized for start-up requirements.

Abstract: A hydrualic power unit for an auto-hoist lift having a more compact motor and improved noise characteristics. The power unit having a reservoir with a closed end and an open end. A manifold attached to the open end and having an inlet port and an outlet port with a hydrualic circuit located between the ports. The hydrualic circuit having a delay valve for reducing the start-up torque load on the motor, thereby allowing the motor to be sized for normal operating requirements rather than oversized for start-up requirements. The power unit may further include a motor and pump located inside a hydrualic fluid reservoir to thereby reduce the amount of noise reaching the immediate vicinity of the power unit. The motor and pump are submerged in the hydrualic fluid to advantageously utilize the hydrualic fluid to cool the motor.

Abstract: A motor-driven compressor assembly comprises a compressor air intake, a compressor rotor, a compressed air outlet and an electric motor for the compressor rotor, with the air intake of the compressor assembly directing intake airflow to the compressor rotor into a heat transfer relationship with the electric motor. The motor-driven compressor includes an outer casing and an inner housing for the electric motor that together form the air intake so the intake airflow through the air intake so formed cools the motor. The motor housing is, in preferred embodiments, a central barrel carrying the electric motor within an outer casing so the intake airflow surrounds the central barrel. The outer casing may also form a mounting surface for motor control electronics, and provide inner finned surfaces in the path of the intake airflow to cool the control electronics. For some applications, the motor-driven compressor can include an operable air bypass between the compressor's air intake and compressed air outlet.

Abstract: A pump enclosure assembly including a submersible pump within an elongate chamber and connected to an excess chamber having a detachable fitting extending through the access chamber to allow easy retrieval and maintenance of the pump. The pump enclosure assembly of the present invention is a sturdy, efficient, inexpensive assembly to promote the efficiency and safety of the pump itself.

Abstract: A motor-driven cooling ventilator comprises a motor and a ventilator fan disposed on the same axis inside a casing, and has air guide device fixed to the periphery of the stator of said motor and fixed to said casing, said air guide device being means fitted to said stator of the motor.

Abstract: An electrohydraulic control system that includes a bidirectional electric motor responsive to application of electrical power for rotation in either of two directions, and a hydraulic pump coupled to the motor and having ports for supplying hydraulic fluid in either of two flow directions as a function of direction of rotation of the electric motor. A hydraulic actuator is coupled to the pump for receiving fluid in either of two flow directions and performing work as a function thereof. An electronic controller applies electrical power to the electric motor so as to obtain a desired level of work at the actuator. The electronic controller includes one or more sensors operatively coupled to the actuator for applying electrical power to the motor as a function of motion at the actuator.

Abstract: The device comprises a blower (2) with an associated motor (1) which is flange-mounted to it. A flexible tube or hose (6) is connected to the sleeve (7) located on a cap (5) which partially covers the blower (2), and at the other end, to a suction or intake opening (8) of the blower (2). In this way, the sucked air impinges on the motor (1) therefore cooling it, and this air is also preheated, allowing in this way to save energy with respect to a conventional drier having the same operation parameters. The hot air is conveyed from the outlet opening of the blower (2), towards the frusto-conical sleeve (14) which discharges it.

Abstract: An integrated electric motor-driven in-line hydraulic pump that includes a housing with an internal shaft, and a cylinder block mounted for rotation on the shaft. The rotor of an electric motor has an internally affixed bearing sleeve that is rotatably supported with respect to the shaft surrounding the cylinder block within the housing. Teeth on the sleeve engage splines on the cylinder block for rotatably coupling the rotor to the cylinder block. The stator of the electric motor is affixed within the housing surrounding the rotor. Pistons are operatively coupled to the cylinder block and engage a yoke plate for obtaining positive displacement pumping action upon energization of the motor. Fluid inlet and outlet ports feed hydraulic fluid through the housing to the cylinder block and pistons, and from the cylinder block to the outlet port.

Abstract: A submersible centrifugal pump (10) includes a casing (11) which houses a motor (13) and a pump assembly (14). A shaft (12) which carries the impeller (37) portion of the pump assembly (14) is driven by the motor (13) to draw fluid, in which the pump (10) is immersed, into the casing (11) in one embodiment through inlet ports (38) to be transferred to the pump assembly (14) and thereby pumped to a remote location. The shaft (12) has an axial bore (40) therein which is open at the bottom (41) to receive fluid. That fluid moves upwardly within the shaft (12) and passes out through radial bores (43) to join with the fluid received from the inlet ports (38). As such, internal fluid positioned in a chamber (23) is cooled by the fluid passing through the shaft (12) and that internal fluid in turn maintains the components in the casing (11) cool. In another embodiment, a submersible centrifugal pump (50) has inlet ports (51) formed near the top of its discharge bowl (15).

Abstract: A gear pump is hydrostatically balanced by providing a plurality of coupling passages connecting diametrically opposed spaces formed between teeth of the gears. The coupling passages form pressure balancing fluid paths which serve to eliminate pressure differences between the diametrically opposed spaces. Additionally disclosed are balancing pistons which act on spindles supporting the gears. The balancing pistons are aligned to oppose resultant of the remaining forces. Additionally discloses is an eductor motor positioned within a fluid reservoir and connected for driving the gears.

Abstract: A plurality of mating tabs are provided on an opening for motor installation use disposed in an end plate of a casing. Along with this, a plurality of mating tabs and support tabs are provided on an outer peripheral end of a flange portion, and the flange portion is rotationally retained on the end plate through combination of these members. A protruding wall portion is disposed on a perimeter of an open portion for motor cooling-air use, and a guide rib of tapered configuration is provided adjacently to this wall portion. At the time of the foregoing rotational retaining, an end portion of a cooling-air passage of the flange portion is guided over this guide rib and mated with the protruding wall portion.

Abstract: A submersible pump (10) includes a casing (11) which houses a motor (13) and a pump assembly (14). A shaft (12) which carries the impeller (37) portion of the pump assembly (14) is driven by the motor (13) to draw fluid, in which the pump (10) is immersed, into the casing (11) through inlet ports (38) to be transferred to the pump assembly (14) and thereby pumped to a remote location. The shaft (12) has an axial bore (40) therein which is open at the bottom (41) to receive fluid. That fluid moves upwardly within the shaft (12) and passes out through radial bores (43) to join with the fluid received from the inlet ports (38). As such, internal fluid positioned in a chamber (23) is cooled by the fluid passing through the shaft (12) and that internal fluid in turn maintains the components in the casing (11) cool.

Abstract: The flow, use, interaction and separation of lubricant and gas flowing through the suction pressure portion of a low-side refrigeration scroll compressor is managed by the use of a drive motor mounting sleeve (46) and a multi-ported frame (40). The mounting sleeve and frame provide for the direction of oil to surfaces within the low side of the compressor shell which require lubrication as well as the conduct of suction gas to the scroll compression mechanism in a manner which cools the compressor drive motor yet which maintains the respective flows of oil and suction gas sufficiently separate to ensure that excessive amounts of oil are not conducted out of the compressor in the gas which is compressed thereby. Lubrication is enhanced by the use of a vent passage (68) which opens into a relatively lower pressure region within the suction pressure portion of the compressor shell.

Abstract: An artificial heart pump comprises a cylindrical stator provided between the inner surface of a casing and a rotor so as to establish a blood flow channel between the outer surface of the stator and the inner surface of the casing, and a rotating magnet and a stationary magnet differing in length in their N-S pole directions provided on the rotor and the stator with their N-S pole directions aligned parallel with the axis of rotation, the boundary between the N and S poles of the rotating magnet being positioned closer to a pivot than the boundary between the N and S poles of the stationary magnet.

Abstract: A vane-type pump which including a housing having interior surfaces defining a pumping chamber having a diameccentric configuration. A diameccentric configuration is defined for purposes of this invention as a substantially circular shaped body whose constant diameter rotates about a point which is offset with respect to the centroid of that shaped body. The diameccentrically configured pumping chamber includes a perimeter section, a front wall, a rear wall, an intake port, a discharge port, an intake region, and a discharge region. A pump rotor is disposed within and is diameccentric to the pumping chamber for rotation within the pumping chamber for pressurizing and pumping a fluid. The pumping chamber, which typically has a generally elliptical shape, has a substantially uniform diameter when measured through the longitudinal center of the rotor.

Abstract: An electrically driven air pump having a housing, a pump mechanism in the housing and an electric motor in the housing connected in driving relation to the pump mechanism. Two spaced elastic supports support the electric motor from the housing at opposite ends of the motor. An air passage in the housing provides a flow of air past the electric motor to the pump mechanism. The air passage includes a suction nozzle supported by one of the elastic supports for supplying air to an inlet collar of a pump impeller of the pump mechanism. The suction nozzle projects into the collar for supply of the air from the electric motor to the pump mechanism.

Abstract: A multistage centrifugal compressor, comprising a casing having an inlet portion and a compression portion. The inlet portion has an inlet opening gaseously coupled to an evaporator so as to receive a gaseous refrigerant. The inlet and compression portions each have a plurality of gas passages therethrough. The compression portion has an outlet opening that is located at the end of the casing which is opposite the end of the casing having the inlet opening. An electric motor assembly is positioned within the inlet portion of the casing so as to provide a transfer of heat dissipated by the motor assembly to the gaseous refrigerant entering through the inlet opening. The gaseous refrigerant flowing in the inlet opening passes through and about the motor assembly so as to cool the motor assembly.

Abstract: A motor driven fan capable of operating continuously in a dead-headed mode resulting from complete blockage of airflow from an outlet of the fan is provided. The fan includes a housing defining both a primary passage for directing a flow of air from an inlet to an outlet of the fan, and a secondary passage for directing a flow of air between the inlet of the fan and ambient air surrounding the housing opposite the primary passage. The secondary passage includes a motor compartment having an inlet passage in fluid communication with the primary passage and an outlet passage in fluid communication with the ambient air surrounding the housing. Impeller means, mounted within the housing, provide the flows of air in the primary and secondary passages.

Abstract: An integrated in-line electric motor/hydraulic pump that includes a pump housing having a pair of end members mounted at opposed ends of the housing. An electric motor includes a rotor on a shaft journalled between the end members and a stator surrounding the rotor within the housing. A pump inlet opens into the interior of the housing. First and second vane pump cartridges are integrated into one of the end members. Each vane pump cartridge includes a rotor coupled to the shaft, and a plurality of vane carried by the rotor to engage a vane cam ring that surrounds the rotor, which defines at least one pumping cavity between the cam ring and the rotor. A vane pump inlet passage within the one end member extends between and operatively couples the housing interior to the pumping cavities of both the first and second vane pump cartridges for feeding fluid from the housing interior to both cartridges in parallel.

Abstract: An electrohydraulic pump load control system that includes a fluid-cooled integrated electric motor/hydraulic pump for delivering fluid under pressure to an accumulator that stabilizes pump output pressure while accommodating changes in fluid flow. A pressure sensor is coupled to the accumulator to provide an electrical signal as a function of fluid pressure at the accumulator. An electronic controller applies electrical power to the pump motor, and is responsive to the electrical signal from the pressure sensor for terminating application of electrical power to the pump motor when pressure at the accumulator reaches the desired threshold. The electronic motor controller controls both application and termination of electrical power to the motor to energize and de-energize the motor at predetermined rates responsive to pressure differential thresholds at the pressure sensor.

Abstract: A motor driven compressor is provided with a means through which the internal portion of the motor is maintained at a pressure below atmospheric pressure when the compressor is operating. This reduced pressure within the motor reduces the windage losses of the motor and reduces the noise generated which as a result emanates from the motor. The present invention is most suitable for use in association with a variable reluctance motor connected in torque provided relation with a screw compressor, wherein the screw compressor is utilized as a vacuum pump. The internal portion of the motor is connected in fluid communication with the suction port of the vacuum pump and this association reduces the pressure within the motor and reduces both the windage losses and the noise emanating from the motor.

Abstract: An axial blower has a blower motor and a blower wheel. The blower motor includes a motor shaft; a motor housing; a front and a rear bearing cover attached to the motor housing; ventilating openings provided in the front bearing cover; and air outlet openings provided in the rear bearing cover. The blower wheel includes a hollow hub surrounding the rear side of the motor housing; a plurality of impellers affixed to the exterior of the hub and projecting therefrom; a plurality of vane-like ribs carried by the hub at the interior thereof for generating a cooling air stream flowing between the hub and the motor housing; a bell-shaped part forming an axial continuation of the hub and surrounding the front side of the motor housing, a bottom portion, a central opening in the bottom portion and a plurality of ventilating openings provided in the bottom portion. The ventilating openings are arranged in a circular array concentrically with the central opening.

Abstract: The subject invention is directed to a vane-type pump which includes a pump housing having interior surfaces defining a pumping chamber having a diameccentric configuration. A diameccentric configuration is defined for purposes of this invention as a substantially circular shaped body whose constant diameter rotates about a point which is offset with respect to the centroid of that shaped body. The diameccentrically configured pumping chamber includes a perimeter section, a front wall, a rear wall, an intake port, a discharge port, an intake region, and a discharge region. A pump rotor is disposed within and is diameccentric to the pumping chamber for rotation within the pumping chamber for pressurizing and pumping a fluid. The pumping chamber, which typically has a generally elliptical shape, has a substantially uniform diameter when measured through the longitudinal center of the rotor.

Abstract: The present invention is an air conditioner with tangential blowers having an arrangement for cooling the blower's driving motor. The motor is attached exteriorly from the air moving chamber and the sidewall through which the motor is attached to the blower includes an axially located aperture. Blade extensions of the blower near the aperture induce an air flow through the aperture, and the induced air flow passes through the motor to carry away undesired heat. A seal can be formed between the motor and sidewall so that the induced air flow must pass through the motor.

Abstract: A portable, high-pressure, power washing system is described which includes an electric motor driven gear pump where the electric motor is effectively water cooled by virtue of being contained in a thermally conductive housing surrounded by an insulating water jacket through which the water being pumped is made to flow before reaching the pump's inlet port. The pump is driven through a gear reduction mechanism such that a relatively inexpensive, single-phase, series AC (universal) motor normally operating at a high rpm can be employed. By proper dimensioning of the pump chamber relative to the drive and idler gears and by providing a flow divider at the pump chamber's discharge orifice, high pumping efficiency is obtained. Completing the assembly is a discharge wand for directing the high pressure water at the surface to be cleaned and for controlling the on/off state of the pump's drive motor.

Abstract: A scroll compressor comprises a compression mechanism comprising a combination of a fixed scroll and an orbiting scroll; a main shaft for driving the orbiting scroll; an electric motor rotor and stator for driving the shaft; a first bearing frame for supporting the orbiting scroll in the axial direction through a bearing; a second bearing frame for supporting the shaft in the radial direction through a bearing; a hermetic shell including the compression mechanism in an upper portion, the rotor and stator in a lower portion, and an suction pipe for inspiring a working fluid; and a dividing chamber arranged in the shell so as to communicate with the suction pipe and having efflux holes for directing the inspired working fluid to the compression mechanism in the upper portion, the stator and rotor in the lower portion, and an upper coil end of the stator placed in a position lateral to the chamber.

Abstract: This invention discloses a lubricating mechanism of a hermetically sealed scroll type compressor in which an inner chamber of a housing is kept at suction pressure. The compressor includes a drive shaft supported by bearings in inner blocks. The drive shaft is operatively linked to an orbiting scroll which orbits within a stationary scroll. A rotation prevention device prevents rotation of the orbiting scroll. The drive shaft includes an axial bore extending from an open end and terminating adjacent a forward bearing. A pin extends from the end of the drive shaft to the orbital scroll. A passage links the axial bore to an opening at the end of the pin facing the orbital scroll. Radial bores are provided near the terminal end of the axial bore and at the rearward end of the axial bore near a rearward bearing. The radial bores link the axial bore to a suction chamber of the compressor to allow lubricating oil to lubricate the bearings. The narrow passages allows lubrication of the rotation prevention mechanism.

Abstract: This invention discloses a lubricating mechanism of a hermetically sealed scroll type compressor in which an inner chamber of a housing is kept at suction pressure. The compressor includes a drive shaft supported by a first plain bearing in an inner block member. The drive shaft is operatively linked to an orbiting scroll which orbits within a stationary scroll. A rotation preventing device prevents rotation of the orbiting scroll. The drive shaft includes an axial bore extending from an open end and terminating within the inner block member. A pin extends from the end of the drive shaft to the orbital scroll and is supported in a bushing within an extension of the orbiting scroll. A second plain bearing supports the bushing. A passage links the axial bore to an opening at the end of the pin facing the orbital scroll. A radial bore is provided near the terminal end of the axial bore to link the axial bore to a suction chamber of the compressor.

Abstract: A pump apparatus for supplying water and air via suitable respective feeding apparatus to a swimming pool or similar facility, with an electric motor for driving the pump apparatus comprising channel sections surrounding, at least partially, the electric motor by forming an annular gap, the air being feedable through the channel sections to a collecting chamber which is connected to a supply member for delivering air to said water feeding apparatus and/or to said swimming pool.

Abstract: A bearing cap (16) is sealingly inserted between a front bearing bush (3) and a fluid-tight sleeve (17). Between a front portion (10) of a rotor shaft (5) and the front bearing bush, two overlying lubricating grooves (11, 12) are disposed. On a rear portion (13) of the shaft, a baffle plate (20) having vanes is mounted, an annular gap (21) existing between the shaft and the inside diameter of the vanes. Between the rear portion of the shaft and a rear bearing bush (4), lubricating grooves (14, 15) are formed continuously. The rotor chamber is quickly vented, no contamination thereof taking place. Lubrication and heat evacuation from the rotor chamber are ensured.

Abstract: A metering fuel pump adapted for feeding fuel containing vapor or air to an engine that includes a housing assembly. The metering fuel pump further includes a motor section encased inside the housing assembly for providing the required rotary motion to a two-stage pump section. The speed of the motor section is controlled by a motor controller section that provides a voltage regulated flow of fuel. The two-stage pump section imparts pressure to the fuel and encloses a cyclonic vapor separator section.

Abstract: A screw compressor assembly includes a motor housing section, a compressor section and an oil separator downstream of the compressor discharge port. The motor housing section defines a flow path for suction gas traveling to the working chamber of the compressor so that the compressor drive motor is cooled by suction gas. The motor housing section also internally defines an integral heat exchange structure through which a passage for the flow of oil is defined. Discharge pressure in the oil separator drives separated oil into the passage in the motor housing heat exchange structure prior to the delivery of such oil to compressor surfaces requiring lubrication. The oil flowing through the integral heat exchange structure is cooled by the suction gas passing over the surface of the heat exchange structure interior of the motor housing.

Abstract: A compressor assembly including an electric motor and a compressor crankcase. The compressor crankcase includes a suction inlet. A motor casing is secured to the crankcase. The suction inlet is connected by means of a first passage to the interior of the motor casing. A baffle located in the motor casing causes a portion of the inflowing refrigerant suction gas to be diverted to flow over and cool the rear windings of the motor. The remainder of the inflowing gas is caused to flow over and cool the front windings of the motor. After flowing over the windings, the two portions of the suction gas are recombined and the suction gas is then caused to flow out of the motor casing to the compressor cylinder suction inlet.

Abstract: A closed loop energy exchange system is disclosed configured to utilize a pump assembly comprising a submersible pump positioned in casing having an inlet means to receive water or similar fluid in a manner to create a turbulent flow of water within the casing.

Abstract: A linear air compressor having a linear electrodynamic motor which is air cooled and has an increased stroke and accordingly increased output. The working piston is provided with and stroke parting on a push-pull spring provides for centering of the plunger of the motor.

Abstract: A refrigerant compressing machine comprises a motor having a rotor and a stator, a compressor driven by the motor to compress a refrigerant, a casing for hermetically receiving therein the motor and the compressor wherein the refrigerant is passed from a refrigerant gas intake port through a refrigerant gas passage formed in the motor in its axial direction toward the compressor to thereby cool the motor. A stirring means is provided, separate from elements which form the refrigerant gas passage, at the outlet side of a motor chamber to stir the refrigerant flowing through the refrigerant gas passage.

Abstract: A compressor of the scroll type which includes a compression part and a motor to drive it, both received within a shell at upper and lower portions thereof, respectively, the compression part including a stationary and a movable scroll each having a convolute shape and associated with each other so as to form compression chambers therebetween, and disposed within the shell between the compression part and the motor is a frame that is formed therein with a hollow space in communication with a suction pipe which is arranged so as to pass through the shell, the hollow space being in communication through the air gap of the motor with a space formed within the shell below the motor, which is in turn in communication with the suction port of the compression part through the space formed between the motor and the shell and the passages formed in the frame.

Abstract: A hermetic motor compressor including a closed housing which covers motor and compressor means; and a partition wall which separates a lower temperature compartment in which at least part of a motor is held and a recycling coolant is fed through an inlet port formed on said housing; and a higher temperature compartment in which a compressor and a coolant muffler and a loop part of an outlet pipe are held.

Abstract: In a motor-driven pump unit for a high-pressure cleaning apparatus, where the cleaning fluid supplied by the high-pressure pump is conveyed through the housing of the motor so as to cool the motor, in order to improve the cooling characteristics and in order to reduce the dimensions of the motor-driven pump unit it is proposed that a fan wheel, which is driven by the motor and which directs a cooling air stream towards the motor housing, be disposed at the end of the motor opposite the pump, and that the fan wheel and the cooling surfaces of the motor be designed in such a way that an adequate cooling of the motor is achieved by the air stream cooling alone when the pump is not conveying any cleaning fluid to the cleaning apparatus or, in other words, is pumping the cleaning fluid only in circulation.