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 motor driven centrifugal fluid pump has the a pump rotor, and the pump drive motor both enclosed in a sealed housing that contains sealed inside the fluid that is pumped, the pump rotor being carried on the motor drive shaft so that the rotor rotates freely within the housing when driven by the motor drive shaft, a fluid input from an outside source to the housing, a fluid output to an outside utilization system from the housing and means carried on the motor drive shaft for compelling some of the fluid inside the housing to flow in heat conducting proximity to the motor to cool the motor and also reduce the thrust load on the motor.

Abstract: A high-temperature motor pump is operated by a method wherein coolant is supplied in a manner to maintain the temperature thereof sufficiently high to keep its viscosity at a low level for smoothly flowing in a narrow gap between a rotor and a stator. Thus, the coolant performs a cooling function without frictional loss, and thereby the motor pump is stably operated with little energy loss.

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 centrifugal fan comprises a volute casing having an electric motor, controlled by a control module, coupled to an impeller mounted in the center of the volute, whereby to force air through the volute. In a predetermined zone of the volute, there is at least one deflecting wall or baffle, the curvature of which is substantially the same as that of this zone. The casing carries fastening means which are arranged to retain at least an element of the control module in a position in which this control module element is substantially integrated with the deflecting baffle. The air flowing in the volute can thus pass over the control module element, so as to cool the latter, without the air stream undergoing any significant perturbation.

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: The invention concerns a device for mounting and keeping together parts in a submersible pump unit.Two groups of screw joints (15) and (16) respectively are alternatively arranged around the periphery of the pump unit, the first group of said joints (15) connectings the stator housing (8) and the seal housing (4) via a ring (13), while the other group of joints (16) connect said ring (13), said pump housing (5) and a cooling jacket (10) surrounding said stator housing (8).

Abstract: An apparatus for providing ventilating air into a housing for an electric machine is disclosed. The apparatus includes a hub mounted to the housing with a raised center portion and a generally circular outer portion. The center portion is displaced upwardly from the outer portion to form an outer surface. The apparatus features a first plurality of main blades extending upwardly from the hub, a second plurality of auxilliary blades extending downwardly from the hub. Ventilating air is communicated through an axial aperture in the hub, the main blades guiding air at least partially into the central aperture and the auxilliary blades transmitting air through the housing. An apparatus including a blower wheel for providing ventilating air into a housing of an electric machine is also featured. The blower wheel features a generally dome-shaped hub. The blower wheel may feature a third plurality of impeller blades extending downwardly from the hub to transmit air into the housing.

Abstract: A motor and fan apparatus a centrifugal fan including a generally circular impeller having a plurality of generally radial vanes. The apparatus also includes a common shaft on which the impeller and the rotor are mounted in axially spaced relation. A circular pan shaped cover encloses the impeller and has a centrally disposed inlet and a wall disposed around the periphery of the impeller in spaced relationship from the periphery of the impeller. A fluid barrier is disposed axially adjacent to the impeller. The barrier and the cover collectively direct fluid flow from the periphery of the impeller in an axial direction parallel to the shaft. The apparatus includes a housing disposed axially adjacent to the barrier. The housing has a generally toroidal shaped part and a smaller generally circular shaped part, the generally toroidal shaped part and the generally circular shaped part are disposed in generally concentric relationship.

Abstract: A compressor includes impeller rotors, a rotatable shaft upon which the impeller rotors are mounted, and tilting pad journal bearings having a ceramics bearing surface. The rotatable shaft is journalled by the tilting pad journal bearings which is arranged to be self generating and air or gas lubricated. The tilting pad self generating bearings reduce frictional losses and the ceramics bearing surfaces prevent problems commonly caused by high speed and temperature generated at bearings.

Abstract: A fuel injection pump for internal combustion engines, which includes at least one pump piston driven by a cam drive mechanism to carry out a feed stroke and an intake stroke. The pump includes a fuel filled storage chamber that is under storage pressure and is for aspirating fuel in the intake stroke and for feeding excess fuel at the end of the feed stroke to a tank. A fluid filled drive mechanism chamber under lubrication pressure, contains the cam drive mechanism and is divided from the intake chamber by a movable wall. A vacuum chamber is disposed in the fluid filled drive mechanism chamber in order to damp pressure oscillations in the drive mechanism chamber, the vacuum chamber is at least partially defined by a membrane that is acted upon by the lubrication pressure. The rigidity of the membrane is designed so that its effectiveness comes into play only when there is a pressure load that is slightly greater than the stationary lubrication pressure in the drive mechanism chamber (22).

Abstract: A pump-motor unit for pumping a coolant for cooling an internal combustion engine in which a centrifugal pump is connected to an electrically commutated d.c. motor to be driven thereby. A power electronic circuit is mounted on a plate and installed in the unit in connection with the d.c. motor to operate the motor in accordance with signals delivered to said power electronic circuit from an external power source. A cooling body is supported in the unit to cool the power electronic circuit by transferring heat from the power electronic circuit to the coolant. The centrifugal pump and the d.c. motor are interconnected through the cooling body.

Abstract: A liquid feeding pump includes two coaxial cylinder chambers, a piston mounted in each chamber, and a piston rod connecting the pistons. A head side of one cylinder chamber functions as a liquid chamber, a rod side functions as a first air chamber, a rod-side of the other cylinder chamber functions as a second air chamber, and a head side functions as a third air chamber. The liquid chamber is formed with liquid inlets or outlets. Each of the air chambers is formed with air inlets or outlets, a part of the supplying pipes connected to the liquid inlet or outlet of the liquid chamber is wound around an outer periphery of the other cylinder chamber, or a peripheral wall of the other cylinder chamber is formed with a liquid cooling chamber and supplying pipes communicated with and connected to the liquid inlets or outlets of the liquid chamber are connected to the liquid cooling chamber.

Abstract: A process for ensuring the operability of gas seals in turbocompressors, especially turbocompressors with a higher operating pressure and a higher shutdown pressure which have gas-lubricated sliding-ring seals for sealing the shaft lead-throughs and in which cleaned gas is fed to the gas-lubricated sliding-ring seals from a higher-pressure tapping location proceeding from the turbocompressor. While the turbocompressor is shut down the pressure of the gas outside of the turbocompressor is increased above the pressure level prevailing during shutdown using a pressure booster unit, and the gas is fed in a cleaned state to the gas-lubricated sliding-ring seals.

Abstract: A pump assembly which includes a prop head which is driven by a rotor that is located in a housing to which the pump head is attached. The pump head includes a drive gear and a driven gear. The drive gear is coupled to the rotor by a shaft which is received at opposite ends by a bearing located in a closed end of the rotor housing and a bearing which is located in the pump head.

Abstract: An in-line, multi-stage pump powered by integral canned electric motors. At least two pump units are connected in series in a pipeline. Each of said pump units includes a hollow housing having a hermetically sealed stator mounted therein. The stator is electrically connected to a source of electrical energy. An impeller assembly that includes a tubular suction shroud and impeller is rotatably mounted inside the housing. The impeller assembly includes a hermetically sealed rotor which is mounted around the suction shroud and positioned inside the stator in operative association therewith. Energizing the stator rotates the rotor, which in turn rotates the impeller to pump fluid from the intake end of the housing to the outlet end of the housing. The subsequent pump units add pressure and/or maintains the pressure of the pumped fluid.

Abstract: A support for the rotor shaft of a centrifugal pump with permanent-magnet electric motor. The motor is of the type which comprises a laminate-pack stator with a coil-like winding and a rotor placed in a cylindrical chamber which is separate from the stator, the rotor being rotatable about the shaft which is fixed axially therein. The support is characterized in that it comprises a tubular shank which extends from the bottom of the chamber and in which one end of the shaft is force-fitted. The bottom has a through hole at the shank.

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 rotary blood pump includes a pump housing for receiving a flow straightener, a rotor mounted on rotor bearings and having an inducer portion and an impeller portion, and a diffuser. The entrance angle, outlet angle, axial and radial clearances of blades associated with the flow straightener, inducer portion, impeller portion and diffuser are optimized to minimize hemolysis while maintaining pump efficiency. The rotor bearing includes a bearing chamber that is filled with cross-linked blood or other bio-compatible material. A back emf integrated circuit regulates rotor operation and a microcomputer may be used to control one or more back emf integrated circuits. A plurality of magnets are disposed in each of a plurality of impeller blades with a small air gap. A stator may be axially adjusted on the pump housing to absorb bearing load and maximize pump efficiency.

Abstract: A canned motor pump has relative small size and low output power for use in, for example, circulating warm water. The canned motor pump comprises a motor stator, a stator can disposed radially inwardly of the motor stator and in which a fluid passage of a main flow of a pumped fluid is defined, a rotatable shaft, a motor rotor fixedly supported on an end of the rotatable shaft and disposed radially inwardly of the stator can, a pump impeller mounted on an opposite end of the rotatable shaft, and all radial bearings for supporting the rotatable shaft disposed between the motor rotor and the pump impeller.

Abstract: A refrigeration system is disclosed in which negative energy storage is provided to significantly reduce electrical energy consumption during peak air conditioning hours. A transfer pump is provided in the system for pumping condensed and mixed phase refrigerant from the negative energy storage to an evaporator coil where it absorbs heat energy from an air conditioned space. The transfer pump is a positive displacement pump employing a rotor and vanes rotating in a pumping chamber. Dual inlets and discharges from the pumping chamber are located to balance forces on the rotor. The inlets enter the pumping chamber radially. A hermetic enclosure seals the pump and an electric drive motor to eliminate dynamic seals within the pump and thereby greatly reduce leakage of refrigeration from the system. A refrigeration overfeed system using a hermetically sealed pump according to the invention is also disclosed.

Abstract: A motor pump assembly incorporates a motor unit and a pump unit and has an outer surface to which a heating element such as a frequency converter is attached. The motor pump assembly comprises a motor having a main shaft, a pump casing encasing the motor and having an inner surface which contacts a fluid handled by the motor pump assembly, an impeller provided on the main shaft and housed in the pump casing, and a heating element which generates heat due to an electric loss and is attached to an outer surface of the pump casing.

Abstract: A fuel injection system includes a vane-type fuel pump. The fuel pump has a first bypass passage with a first pressure relief valve for relieving pressurized fuel from a discharge passage downstream of a check valve to the discharge passage upstream of the check valve so that excess pressure in the discharge passage downstream of the check valve can be relieved to the discharge pressure upstream of the check valve. Therefore, fuel leakage through a fuel injection valve can be prevented for avoiding possibility of formation of overrich mixture even upon hot start condition.

Abstract: A high temperature, centrifugal pump includes a thermally isolated and dynamically air cooled shaft seal. Carbon graphite insulators formed of plural elements juxtaposed together (46) insulate the seal assembly (34) from the pump housing (16). A hollow drive shaft limits heat conducted from the impeller during operation while a fan (56) forcibly flows air past the seal assembly to conduct heat energy away from the shaft seal. The insulator (46) reduces heat energy conducted to the seal assembly (42).

Abstract: The present invention relates to a circulating pump for pressurizing and circulating fluid in a system such as a boiler. An object of the present invention is to provide an improved structure of an impeller body and a motor shaft so that a substance such as mud is prevented from being accumulated in a motor while the motor is sufficiently cooled. The circulating pump comprises a motor, an impeller and a pump housing. At the outer surface of motor shaft a spiral groove is formed and at the center of motor shaft a cooling water discharging passage is formed along the axis of the motor shaft. At a lower portion of an impeller body a curved projecting portion forming a cooling water inflow chamber by joining together with motor shaft is provided and a plurality of cooling water outlet holes are formed therein. At an upper end of cooling water discharging passage a ball seat with a ball therein is provided.

Abstract: A discharge passage 15 which communicates with a discharge outlet 16 of a compressing section 3 and discharges compressed gas into a chamber S1 opposite to the compressing section with respect to a motor 2 is provided axially through a drive shaft 4 of the motor 2. An outward discharge pipe 17 is opened at a middle chamber S2 provided between the compressing section 3 and the motor 2 inside a hermetic casing 1. An effect of cooling the motor 2 by discharge gas can be fully exerted, so that possible temperature increase of the motor 2 is prevented to improve reliability and efficiency of the motor 2, and oil mixed in the discharge gas is separated.

Abstract: A fluid conveying device has a main housing and a rotor housing which accommodates an impeller. The rotor housing is located inside the main housing and cooperates with the latter to form a motor chamber and an intake chamber. The two chambers are disposed on opposite sides of the rotor housing and communicate with one another via connecting passages. The main housing is provided with apertures which connect the motor chamber to the atmosphere, and a motor for the impeller is mounted in the motor chamber behind the apertures. The main housing is further provided with an outflow opening which faces the intake chamber, and a discharge opening which leads out of the main housing. The outflow opening is connected to a source of gas containing combustible components. The rotor housing has an inlet which opens to the intake chamber and registers with the outflow opening in a non-concentric manner, and an outlet which communicates with the discharge opening.

Abstract: A submersible electronic drive module for a vehicle in-tank fuel pump which includes a circuit board assembly having an input connector for receiving a current, an output connector for applying electric power to a fuel pump electric motor, and electrical components for supplying electric power to the motor as a function of vehicle fuel demand. A heat sink of a heat conductive material is thermally connected to the circuit board assembly which absorbs heat generated by the electrical components on the circuit board assembly. Fuel passes through the heat sink to cool it and thus the circuit board assembly and electrical components. A fuel-impervious casing encapsulates the drive module so that fuel is prevented from contacting the circuit board assembly and electrical components. The electronic drive module is removably attached to the fuel pump and is mounted within a fuel tank of an automotive fuel system.

Abstract: A full-circumferential flow pump has a circumferential fluid passage between a sheet metal pump casing and a motor provided in the pump casing. The full-circumferential flow pump comprises a suction-side casing having a suction nozzle, and an outer cylinder connected to the suction-side casing and accommodating the canned motor therein. The suction-side casing and the outer cylinder have flanges, respectively extending radially outwardly from an open ends thereof. The adjacent flanges of the suction-side casing and the outer cylinder are clamped by clamping flanges to connect the suction-side casing and the outer cylinder.

Abstract: A fuel pump wherein the inner cylinder 37 for forming the fuel duct 38, in the outer cylinder 14, is provided between the stator 34 and the rotor 32 of the brushless motor 12, one end portion of the inner cylinder 37 is blockaded by the holder plate 41. The contacting pipe 44 for connecting from the fuel duct 38 to the delivery duct 21 is protrudely provided at the holder plate 41, and the control circuit unit 13 of the brushless motor 12 is held thereon. A resin sealed portion 52 is formed between the outer cylinder 14 and the inner cylinder 37, and the circumference of the control circuit unit 13 in the inner cylinder 37 by a potting method. The fuel 54 is lead from the introductory duct 16 to the fuel duct 38 of the inner cylinder 37, and is delivered from the delivery duct 21 through the insides of the fuel duct 38 and the contacting pipe 44.

Abstract: A low profile motorized impeller assembly is provided for use in an air moving blower product. The assembly has a motor mounting base onto which a stator is fixedly attached. An impeller having a plurality of vanes has a ring-magnet rotor integrated therein. A pair of bearings are received in a beating receiving boss in the impeller, and a shaft which is fixedly attached to the motor mounting base is received therein. A plurality of permanent magnets are mounted on the motor mounting base between the arms of the stator so that when the windings of the stator are de-energized the permanent magnets attract the poles of the ring magnet to an offset position.

Abstract: A multistage canned motor pump comprising a pump section including a plurality of pump chambers and a motor section behind the pump section, both the sections having in common a single rotation shaft, and further a balance disk between the pump and motor sections, wherein an external circulation system is provided so that a part of a treating liquid discharged from a last stage pump chamber is circulated from a front rotor chamber through a pressure chamber accommodating the balance disk to a rear rotor chamber while the remaining part of the treating liquid is supplied to a rear bearing section for lubrication of the bearing section and further circulated through an external pipe to a pump section port for cooling of the motor section, and wherein an annular balance sheet is provided a verge at a high pressure side of the balance disk in the pressure chamber to control a flow rate of the treating liquid to thereby reduce a pressure of a circulation flow of the treating liquid toward the motor section.

Abstract: In a sealed electric scroll compressor, lubricating oil is collected in an oil collection pan mounted under a compression mechanism after the compression mechanism is lubricated thereby, the lubricating oil collected in the oil collection pan is discharged from a small hole at the side of the oil collection pan which is located remote from a delivery pipe for delivering a high-pressure refrigerant gas outward from a sealed container of the sealed electric compressor. The high-pressure refrigerant gas flows between the inner wall of the sealed container and a vertical cut part formed on the circumference of a stator of an electric motor.

Abstract: A canned motor for use in a pump has an outer frame casing fitted over a stator, a pair of side frame members welded to respective open ends of the outer frame casing, a can fitted in the stator and joined to the side frame members, and an outer cylinder disposed around the outer frame casing with an annular spaced defined therebetween, the outer cylinder being welded to the outer frame casing. The outer cylinder has a pair of flanges disposed respectively on axially spaced open ends thereof for attachment to components of a pump assembly and holding a fluid being handled within the outer cylinder. The outer cylinder has a hole defined in an outer circumferential wall thereof for passing leads for connection to a power supply.

Abstract: A rotary blood pump includes a pump housing for receiving a flow straightener, a rotor mounted on rotor bearings and having an inducer portion and an impeller portion, and a diffuser. The entrance angle, outlet angle, axial and radial clearances of blades associated with the flow straightener, inducer portion, impeller portion and diffuser are optimized to minimize hemolysis while maintaining pump efficiency. The rotor bearing includes a bearing chamber that is filled with cross-linked blood or other bio-compatible material. A back emf integrated circuit regulates rotor operation and a microcomputer may be used to control one or more back emf integrated circuits. A plurality of magnets are disposed in each of a plurality of impeller blades with a small air gap. A stator may be axially adjusted on the pump housing to absorb bearing load and maximize pump efficiency.

Abstract: A fuel pump for automotive vehicles which has a pump housing and an outlet housing at the respective ends of a pump motor with an armature and a stator. A drive and support shaft at one end of the armature is journaled for rotation in a bearing in the pump housing. The shaft and bearing at the one end of the armature serves as the only bearing and support for the armature in a cantilever relation to the pump housing.

Abstract: A heat exchanger for use in combination with motor driven fluid pumps of the type having a motor with an outwardly curved upper surface. The heat exchanger has an arcuate heat exchange jacket formed of an inner wall, an outer wall, and a spacer frame sealed therebetween which has an open center section defining a hollow enclosed cavity. The jacket is configured to engage the exterior surface of the pump motor for maintaining heat exchange contact between the pump motor and the cavity. The jacket has a fluid inlet and one or more outlets. A venturi cross having a pair of tubular extensions may be connected to the intake port of the pump with one extension connected to the jacket inlet and the other extension to the jacket outlet to subject the jacket to negative pressure created by the venturi cross to draw a portion of the fluid through the jacket cavity and recirculate it through the pump.

Abstract: A water jet propulsor powered by an integral canned electric motor includes a hollow housing having a hermetically sealed stator mounted therein. The stator is electrically connected to a source of electrical energy in the vessel. An impeller assembly that includes a tubular suction shroud and impeller is rotatably mounted inside the housing. The impeller assembly includes a hermetically sealed rotor which is mounted around the suction shroud and positioned inside the stator in operative association therewith. Energizing the stator rotates the rotor, which in turn rotates the impeller to pump water from the intake end of the housing to the outlet end of the housing and adds velocity and head to the water to be discharged from the outlet end. The discharged water creates thrust which propels the vessel.

Abstract: A submersible motor-driven pump which has a jacket for the motor casing through which a coolant flows, the jacket receiving a pipe with a bent inlet for discharging the coolant and which lies against the motor casing and extends the full height of the jacket from the partition between the motor casing and the pump below the motor to the top of the jacket.

Abstract: A full-circumferential flow pump has a circumferential fluid passage between a pump casing and a motor provided in the pump casing. The full-circumferential flow pump comprises a suction-side casing having a suction nozzle, and an outer cylinder connected to the suction-side casing and accommodating the canned motor therein. The suction-side casing and the outer cylinder have flanges, respectively extending radially outwardly from an open ends thereof. The adjacent flanges of the suction-side casing and the outer cylinder are clamped by clamping flanges to connect the suction-side casing and the outer cylinder.

Abstract: An improvement in a fuel pump for an internal combustion engine in which the fuel pump comprises an electric motor over which fuel is pumped to cool the motor, and a pump mechanism, constituted as a side-channel pump driven by the electric motor, pumps the fuel. The pump mechanism has a pump impeller provided with two opposite radial surfaces each provided with an annular ring of blades respectively cooperating with side channels provided in a pump wall to constitute first and second pump stages. A connecting channel connects an inlet region of the side channel of the second pump stage with a discharge region of the side channel of the first pump stage in an arrangement to substantially eliminate torsional moments acting on the impeller during a fuel pumping operation. A first flat region is formed on the radial surface of the pump impeller in the first pump stage and a second flat region is formed on the radial surface of the pump impeller in the second pump stage.

Abstract: A pump (1) includes a pumphouse (2) having an inlet (3) for admitting a medium at a suction side of the pump and an outlet (4) for discharching the medium at a delivery side of the pump. A pumping device is rotatably arranged on an axle (6), the axle being driven by a driver including a rotor and a device for coupling energy to the rotor. A medium tight shell (11) is arranged around the rotor and the axle; and a first canal (18) extends from a first location at a level near or beyond an axial bearing to a second location (24) in the pump where a lower pressure is dominant than at the first location.

Abstract: A liquid refrigerant pump includes a housing having a hollow interior for receiving liquid refrigerant, a motor disposed within the interior of the housing and connected to a source of power, a rotatable pump member disposed within the interior of the housing and a shaft interconnecting the motor and pump member for rotating the pump member to increase the pressure of the liquid refrigerant upon the motor receiving electrical power.

Abstract: A submersible pump support including at least one pump housing, a first pump support rail extending in a first plane coupled to and supporting the at least one pump housing, a second pump support rail extending in the first direction in the first plane coupled to and supporting the at least one pump housing, wherein a distance of the at least one pump housing from the first plane is no more than one half a distance, in the first plane, between the first and second pump support rails.

Abstract: A damper in a self-contained electrically operated fuel pump for vehicle engines incorporating a positive displacement pumping element. The damper has a hollow toroidal flexible element in contact with the liquid fuel discharged from the pump for absorbing pulsations. A retainer with a locating plate on one side of the damper centers it in the pump housing and has resilient circumferentially spaced, radial fingers extending over and around the periphery of the toroid to confine it against destructive expansion while permitting limited expansion and contraction needed to absorb fuel pressure pulsations in pump operation.

Abstract: A multi-stage automotive fuel pump includes a casing and motor located within the casing for driving primary and secondary pumping sections, with the primary and secondary pumping sections sharing a common wall which axially separates primary and secondary rotary pumping elements and which houses a fuel transfer for moving fuel from the primary into the secondary pumping sections in a manner which avoids generation of turbulence and cavitation.

Abstract: A magnet assembly in an electric motor of a motor vehicle fuel pump includes a tubular ferromagnetic flux carrier closely received in a shell of the fuel pump between a pump at one end of the shell and an end housing at the other end, a pair of arc-shaped permanent magnets on the flux carrier having a non-magnetic state as formed and a magnetic state after exposure to magnetic flux, an elongated arc-shaped plastic locator between the magnets, and a spring clip opposite the locator urging the magnets into magnet pockets in the locator. The plastic locator is the same length as the flux carrier and conforms to the curvature thereof. Each magnet pocket has a pair of short lateral sides which capture the magnets in their non-magnetic state and establish the locations thereof relative the ends of the flux carrier.

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 fuel pump for a vehicle includes a brushless motor for operating this fuel pump, and a control circuit for the brushless motor is contained in the fuel pump. Difficulties such as a cutting of the wiring due to an electrolytic corrosion of electrically-conductive portions, and a short-circuiting thereof, are prevented. A pump portion, a motor portion and a discharge portion are provided in a housing of the fuel pump. The motor portion includes a rotor and a stator portion. The stator portion is molded by a resin material into a cylindrical shape with a closed bottom. The stator portion supports a shaft of the rotor. Stator coils are molded in a peripheral wall portion of the stator portion, and a container containing the control circuit is molded in the bottom wall portion of the stator portion. The stator coils, copper wires extending therefrom, and terminals from the control circuit are completely molded in the above resin material.