Abstract: A centrifugal pump for left ventricle assist includes a pump housing forming an impeller chamber with inlet and outlet passages and enclosing an impeller rotatable to move blood or other fluids through the impeller chamber, and a rotor chamber enclosing a rotor integral with the impeller and rotatable to drive the impeller. A stator is mounted outside of a rotor casing forming the rotor chamber, concentric with, radially outward of and approximately axially aligned with the rotor. The stator includes a stator frame with an annular back iron and twenty-four teeth equally spaced apart and projected radially inwardly of the back iron. Three wires, one for each of three motor phases, are wound about the back iron, each including four symmetrically arranged active segments toroidally wound about the back iron, corresponding to four poles in a permanent magnet fixed to the rotor.

Abstract: A split tube centrifugal pump comprises a pump casing divided into a pump space and a motor space, an impeller driving a conveying fluid in the pump casing, a vertically disposed shaft in the casing, the shaft being hollow and including an axial channel therein, a rotor including a channel therein, and a partition separating the pump space from the motor space. The partition includes a first aperture through which the shaft passes and a second aperture. The conveying fluid circulates between the pump space and the motor space in a circuit comprising the first aperture in the partition, the channel in the rotor, and the channel in the shaft. In a particularly preferred embodiment of the invention, the split tube centrifugal pump further comprises a filter disposed upstream or downstream of the first aperture in the partition, and a slide ring sealing associated with the second aperture and through which the vertical shaft passes.

Abstract: A rotary pump for pumping fuel for internal combustion engines in the form of a vane pump or gear and rotor pump with pumping chambers disposed circumferentially around the rotor. The chambers progressively increase in the inlet area of the pump to draw in fuel and progressively ensmall at the outlet area to discharge fuel under pressure to supply an engine. The pulsations initiated in the pump are absorbed in the pump by a closed chamber exposed to the pump outlet flow, the chamber having flexible walls and an internal pressure above atmospheric to reduce pulses in the outlet and resulting pump noise. The chamber is blow molded with an enclosed volume surrounded by flexible walls.

Abstract: Motor driven pumps are provided of the canned, or isolated stator type which include a center shaft, rotating shaft support bearings, controlled cooling, and automatic thrust balancing construction, utilizing fixed orifices. A snubber is carried on the shaft at the shaft end opposite to the impeller. The snubber has an en surface which faces an end liner plate. Thrust balancing is achieved by axial movement of the shaft which permits fluid flow between the end liner plate and the snubber.A snubber is carried on the shaft at the shaft end opposite to the impeller. The snubber has an end surface which faces an end liner plate. Thrust balancing is achieved by axial movement of the shaft which permits fluid flow between the end liner plate and the snubber.

Abstract: An immersion pump, especially for low-boiling fluids, having a support for a shaft and a ferromagnetic impeller wheel mounted to the shaft. The support includes at least one controllable electromagnet that operates to axially support and position the impeller wheel. An outlet path is also provided to enable vapor bubbles within the moving fluid to escape from the pump and be returned to the liquid supply.

Abstract: A rotor of an electric motor with a spherical magnetic gap or an impeller which forms a pivotably mounted rotating unit with an armature consists of a permanent magnetic annular member which is arranged juxtaposedly to a second stationary permanent magnetic annular member. The two magnets are spaced apart from each other by an air-gap and remain apart from each other because of their polarity. This prevents tumbling and counteracts the hydraulic thrust to prevent liftoff of the rotating unit from the step bearing.

Abstract: An apparatus for pumping fluid such as an integral pump/motor is provided. A housing having an inlet and an outlet has a rotatable assembly including an impeller located within and adapted to rotate within the housing to move fluid through the housing from the inlet to the outlet. Secured to the exterior of the housing is a stationary assembly for applying an electromagnetic field through the housing to and around the impeller to rotate the impeller and thereby to cause it to move fluid through the housing.The apparatus is for use in a cooling system, such as a cooling system of an automobile engine, to pump fluid through the cooling system. A temperature sensor is provided for sensing the temperature of the fluid within the cooling system. An electronic control, responsive to the temperature sensor, supplies electrical power to stationary assembly.Also, a method of circulating fluid within a system, such as a cooling system of an automobile engine, is disclosed.

Abstract: A step bearing with spherical gliding surfaces having a stationary mounted ceramic ball mounted on a strut, on which a magnetic rotor with a concave cap is rotating under working conditions. During operation the rotor with the cap is pressed by magnetic thrust in the direction toward the strut, while a second annular bearing member of the rotor prevents axial movement of the cap when axial forces in the direction opposite to the direction of the magnetic forces become higher than the magnetic forces.

Abstract: A centrifugal pump of the "sealless" type including a casing containing a pumping chamber, inlet and outlet, and an impeller mounted on a shaft supported by an independent bearing system. The impeller shaft is driven by a motor located outside of the casing through a set of magnets located on the opposite sides of the wall of the casing and magnetically interconnected together with the motor driving the magnets located on the outside of the casing and with magnets located on the inside of the casing being connected to and driving the pump impeller. The bearing system includes a lubricating system which in some cases will use the pumped fluid as a lubricant and coolant.

Abstract: In a compressor of the hermetic, scroll-type, a motor engaging drive shaft having a net axial thrust load determined by the pressure of compressed fluid acting upon the opposing ends of the shaft. In the preferred embodiment, the shaft includes a first end in the discharge pressure portion providing a first plan view area and a second end in the suction pressure portion having a circular, eccentrically disposed cavity with a second plan view area. The shaft has an axial bore for communicating refrigerant at discharge pressure through the shaft between the respective ends such that refrigerant at discharge pressure acts in opposite directions upon both of the respective plan view areas to balance the net thrust load of the shaft.

Abstract: A motor-driven fuel pump including a motor section provided with a driving motor, and a pump section arranged below the motor section and provided with an impeller to be driven by the driving motor. A plurality of pressure compensation hollows are formed on opposite surfaces of a sealing portion of the impeller, and a plurality of communication holes are formed through the sealing portion for communicating the pressure compensation hollows. In another aspect, a plurality of pressure compensation passages are provided to be communicated to a higher pressure side of either a pump chamber defined around outer peripheral vanes of the impeller and a fuel well for receiving a fuel leaked along a sealing portion of the impeller.

Abstract: In a fuel pump driving apparatus for a vehicle engine including a fuel injection system, the selection of a plurality of energizing circuits each formed by the combination of two or all of three brushes of a fuel pump drive motor is effected in accordance with the load conditions of the engine, thereby changing the rotational speed of the motor and hence the fuel quantity delivered from the fuel pump. When the occurrence of a fault in one of the energizing circuits is detected, the driver is informed of the occurrence of the fault and in addition a faulty-condition controller controls switching means in such a manner that the drive motor is energized through another one of the energizing circuits.

Abstract: A pump including an impeller having a magnet or a second conductor therein, the impeller being adapted to be directly rotated by virtue of magnetic fields of stator coils. The impeller is rotated within a casing in close proximity thereto via ceramic bearing members, one bearing member having spiral grooves on its slide surface. The ceramic bearing members constitute a dynamic pressure bearing means.

Abstract: A centrifugal pump of the magneto coupling type in which an isolation shell separates the pump side from the driver side includes an auxiliary impeller arranged additionally to the pump impeller proper. This allows a decreasing of the pressure in the spaces at the reverse side of the pump impeller and thus a balancing of the thrust forces. This effect can be controlled by control means located in the casing at the outer end of the feeding channels of the auxiliary impeller. This allows the provision of a pump of a simple design in which e.g. the isolation shell can be made with an extremely small wall thickness and in which an open or closed pump impeller can be supported without any thrust generated difficulties.

Abstract: A centrifugal compressor for use in turbo-refrigerators, for example, has a motor casing frame section in which a drive motor is accomodated and a gear casing frame section in which a multiplying gear mechanism is accomodated. The multiplying gear mechanism is connected at its input side with the drive motor and at its output side with an impeller. The mechanism has a first shaft including a rotor shaft of the drive motor and a gear shaft carrying a multiplying gear and separably connected directly with the rotor shaft, a second shaft mounting the impeller and having a pinion meshing with the speed multiplying gear, and bearings mounted on bearing casing frame sections for supporting the first and second shafts at their opposed ends, respectively. The motor casing frame section, gear casing frame section and bearing casing frame section are integrally formed as a unitary body.

Abstract: An axial-flow molecular pump has a first active magnetic bearing for axially supporting and controlling a pump member comprised of a set of permanent magnets on the upper end of the pump member cooperating with a set of permanent magnets fixedly mounted at the upper end of a pump housing, a first electromagnet coacting with the sets of permanent magnets and operative when energized for controlling the axial position of the pump member, and an axial sensor for detecting axial displacement of the pump member and accordingly controlling the energization of the first electromagnet. A second active magnetic bearing for radially supporting and controlling the pump member comprises a second electromagnet operative when energized for controlling the radial position of the pump member, and a radial sensor for detecting radial displacement of the pump member and accordingly controlling the energization of the second electromagnet.

Abstract: A thrust reducing apparatus for a progressing cavity pump used in a well and driven by a submersible pump motor. A piston is mounted to the top of the rotor and located in a bore between the stator and the tubing which extends to the surface. A bypass passage enables fluid discharged from the pump to flow past the bore and the piston. An annulus passage extends into the bore above the piston for communicating fluid pressure in the annulus to the top of the piston. The lower side of the piston is exposed to discharge fluid pressure from the pump, resulting in a net upward force on the piston. The piston pulls upwardly on the rotor to reduce the downward thrust on the rotor.

Abstract: A device preferably utilized for pumping oil or other fluid from a drill hole in the ground, said device including a pump lowered into the hole and coupled to a drive motor situated under it. The pump comprises a hydraulic screw pump including a housing in which there is mounted a screw array in the form of a drive screw provided with a shaft coupled to the drive motor, and at least one running screw meshing with the drive screw. The rotational direction of the drive motor is such that the screw array pumps the liquid from an inlet, made radially in the housing and in communication with the liquid in the drill hole, to an outlet arranged at the end of the screw array remote from said shaft.

Abstract: A turbo-molecular pump characterized in that three out of five degrees of freedom except the rotation around the rotational axis of a shaft are actively controlled constrainingly by a pair of magnetic radius direction bearings and a pair of magnetic axial bearings, a bell-shaped rotor provided to cover the whole of magnetic bearing and a shaft which is supported by a magnetic bearing passively constraining the remaining two degrees of freedom, and said rotor is rotated at high speed by an inner-rotor type of a driving motor provided between a radius direction bearing and axial bearing.

Abstract: A pump apparatus comprising a rotary pump including a rotatable shaft having opposite ends to which are drivingly connected a pair of brushless motors. A rotor is secured to the shaft and is mounted within a pump chamber. A drive circuit is connected to the brushless motors to drive the same in synchronism. All of the above components are contained in a casing.

Abstract: An electric fuel pump for pumping a liquid fuel from a tank to an engine. The pump device has a regenerative pump section and an electric motor section for driving the regenerative pump section. The regenerative pump section includes a pump casing having a first inner surface and a second inner surface axially opposing to and spaced from each other to define therebetween a pump chamber, a shaft adapted to be rotatingly driven by the electric motor section and an impeller accommodated by the pump chamber and mounted on the shaft for rotation therewith but axially movably relatively thereto. The impeller has one axial end surface opposing to the first inner surface with a first gap formed therebetween, and the other axial end surface opposing to the second inner surface of the pump casing with a second gap formed therebetween.

Abstract: A method for ensuring fluid-tightness is applicable to a submersible motor for operation under conditions of total and permanent immersion, especially in oil wells and geothermal boreholes. The emergent end of the drive shaft of the motor is fitted with a rotary packing-gland. The motor casing is filled with oil which is circulated via an axial duct of the drive shaft, the impulse being produced by a disk pierced by radial ducts. A second circuit constituted by a system of ducts including radial ducts comes into contact with the packing-gland which is at overpressure with respect to the external medium. This results in a controlled leakage flow between the two portions of the packing-gland.

Abstract: A motor pump is described wherein an air cooled, oil-lubricated motor has its rotor axially displaced from its stator and in which the bearing support for the motor shaft is entirely on one side of the rotor. The drive shaft is coupled to the impeller in the pump unit by means of a flexible coupler which serves to reduce vibration levels which are transmitted through the piping system.

Abstract: A vertical motor pump including an upper bearing and a lower bearing located on the motor side for journaling a rotary shaft for rotation at an upper portion and a lower portion respectively of a rotor, at least one of the upper and lower bearings being constituted by a ball bearing. The vertical motor pump further includes a hydrostatic lubricated bearing system for journaling the rotary shaft besides the ball bearing, for bearing a radial thrust during operation.

Abstract: The combination of a motor-driven impeller pump assembly and a self-priming column attachment. The column attachment is detachably secured to the pump assembly and includes an elongate shaft exterior which is attached to an impeller in the pump assembly with a detachable connection. An axial flow inducer is located at the bottom end of the column attachment and serves to lift a fluid in the column towards the impeller. A balance line conduit extends from a balance chamber located behind the impeller downwards on the extension of the column to the level of the axial flow inducer, thereby serving to lessen axially imbalanced forces acting on the impeller pump assembly. The column also includes a set of straightener vanes to reduce rotational flow through the length of the column. A double-volute chamber surrounding the impeller serves to radially balance forces acting on the impeller, the motor and their associated bearings.

Abstract: A centrifugal compressor capable of rotating at high speed by means of an electric motor comprises two compression stages cantilevered one at each end of a shaft, an electric motor of which the rotor is carried by a central part of the shaft, magnetic bearings, and a magnetic stop. The motor, the bearings and the stop are placed in a housing placed under a partial vacuum. Two facial gaskets adjustable as a result of longitudinal displacement of a component and of the shaft seal the compressor and ensure sealing of the space within the housing.

Abstract: The invention relates to a pumping set for plants carrying water, comprising a split-tube motor and a rotary pump driven by the same, the impeller of which is located on the extremity of the shaft present in the pumping space, said shaft being carried by two radial anti-friction bearings situated at either side of the rotor stack of laminations, and consists of ceramic material at least in the area of these anti-friction bearings and is longitudinally movable with respect to the ceramic bearing rings of the radial anti-friction bearings under forces acting axially on the impeller, the maximum length of this longitudinal displacement being limited by two axial anti-friction bearings. An annular groove is provided in the shaft directly adjacent to each of the two bearing areas of the radial anti-friction bearings, that is to say in each case adjacent the extremity of these bearing areas directed towards the impeller, and that the said distance is smaller than the width of the annular grooves.

Abstract: A turbo-molecular pump has passive magnetic bearings which are radially stable but axially unstable and mechanical thrust bearings acting axially, the magnetic bearings and the stator forming a structural unit movable axially within the pump housing and connected to an element adjustably supporting one thrust bearing while the other thrust bearing is fixed to the housing with control gear being provided for adjusting the structural unit relative to the housing and the thrust bearing relative to the structural unit in dependence on force sensing devices.

Abstract: A submersible pump electrical motor has a rotor that is divided into sections, and a bearing located between each of the sections for maintaining the shaft of the rotor in axial alignment. The bearing assembly includes a sleeve that is keyed to the shaft. A bearing has an inner portion that rotatably receives the sleeve. The bearing has a flange with a periphery that frictionally engages the stator to prevent the bearing from rotating. The sleeve physically contacts the adjacent rotor sections and transmits forces between them. Washers are located between upper and lower edges of the bearing inner portion for supporting the bearing. The washers have inner diameters that receive the sleeve, and do not carry the weight of any rotor sections located above.

Abstract: Submersible electric motors for pumping fluid from wells are assembled together in tandem relationship for increasing total output horsepower. Means are provided to make electrical connections just prior to assembly and interconnect the oil flow corridors between motors during assembly. Precompressed spring-loaded thrust bearings compensate for shaft length changes and dampen vibrations. The oil circulation corridors include filtration.

Abstract: Submersible electric motors for pumping fluid from wells are assembled together in tandem relationship for increasing total output horsepower. Means are provided to make electrical connections just prior to assembly and interconnect the oil flow corridors between motors during assembly. Precompressed spring-loaded thrust bearings compensate for shaft length changes and dampen vibrations. The oil circulation corridors include filtration.

Abstract: A submersible motor apparatus having a plurality of unit motors connected in series through their shafts in the direction of application of gravity. The shaft of an uppermost unit motor constituting an output shaft of the motor apparatus to which a pump is to be connected. The submersible motor apparatus has an upper thrust bearing disposed above the level of the stator core of the uppermost unit motor and adapted to bear the axial load applied to the shaft of the uppermost unit motor, and a lower thrust bearing disposed below the level of the stator core of a lowermost unit motor and adapted to bear the axial load exerted to the shaft of the lowermost unit motor. The shafts of the unit motors are connected in series by splined couplings.

Abstract: The pump described is of the canned motor type generally used for handling caustic materials where the motor is integrated into the pump, but must be totally sealed therefrom. The pump rotor is mounted on a hollow shaft that is supported by bearings on a hollow mandrel which has one end secured to the pump housing and the other end secured to a lug projecting from a rear shaft support plate. The lug is hollow and is provided with a plurality of ports that provide fluid communication between the motor housing and the pump inlet through the hollow mandrel. The shaft is arranged, when moved axially by the thrust developed by the centrifugal pump to open and close the ports regulating flow therethrough and thereby exerting a force on the shaft to counteract the thrust force generated during pumping.

Abstract: A method and apparatus are provided for automatically and continuously balancing the unbalanced thrust resulting from the operation of a fluid pump which is driven by a fluid pressure motor. A hydrostatic-type thrust bearing is employed on the common shaft of the fluid pump and motor by applying pressures to opposite sides of the circular flange of such hydrostatic thrust bearing to compensate for any unbalance in thrust occuring during operation of the pump without requiring any axial movement of the hydrostatic thrust bearing flange. Because of the lack of flange movement, the thrust bearing operates with a constant fluid film thickness.

Abstract: A motor pump comprises a DC motor unit, a pump unit and a cover housing for the motor and pump unit; the motor unit includes a cup-shaped yoke with the bottom having a bearing, and a bearing holder is fitted into an opening in the cup-shaped yoke to thereby hold an armature shaft of the motor unit in position with respect to the yoke. The pump unit has a pump stator secured to the bottom of said cup-shaped yoke and a pump rotor connected to the armature shaft by key arrangement. The pump stator has a passage communicating the gap in the key arrangement and the pump inlet. As a result, fuel in the gap is prevented from stagnating therein, thereby preventing rusting of the pump components.

Abstract: A motor pump comprises a DC motor unit, a pump unit and a cover housing for the motor and pump unit; the motor unit includes a cup-shaped yoke with the bottom having a bearing and a bearing holder fitted into an opening in the cup-shaped yoke to thereby hold an armature shaft of the motor unit in position with respect to the yoke; a compressible silencer is also installed in the cup-shaped yoke adjacent permanent magnets, an armature surface and the yoke.

Abstract: A motor driven pump is described having an improved and simplified construction of pump casing and impeller with easy adaptability of the components over a wide range of capacity, an improved construction of the motor stator and rotor with structure which is adaptable for selection for use over a wide range of input, improved structure for alignment and support of the motor stator and of the motor rotor from a reference element referred to as a post, and without compounding and piling up of tolerances, and with adequate provisions for cooling and for pressure balancing.

Abstract: A high-volume, heavy-duty, magnetically-coupled centrifugal pump having flow-dividing duct configurations directing the influx to opposite sides of the impeller as the result of assembly of mating body sections defining a multi-chambered pump body and including major partitioning web and cavity configurations with cooperative plate means affording certain inflow-chamber, shaft-support, and turbulence-suppressing chamber configurations operative to diminish turbulence volume and also block transfer of turbulence effects from the magnet rotor back to the impeller while permitting liquid to fill into the magnet chamber, the magnet rotor having web and passage configurations operative to force liquid and create pressure behind the rotor to create counterforces opposing certain thrust forces.

Abstract: A magnetically driven, powerful rotary pump comprising at least one driven magnet secured to the rotary shaft of a pump and housed in a magnet case to separate the driven magnet in a liquid-type chamber from the pump chamber and at least two driving magnets secured to a drive shaft to be connected to a power source, with the at least one driven magnet being housed in the magnet case and being sandwiched in between the driving magnets. In one embodiment, the at least one driven magnet treated to be corrosion resistant and the magnet case is made of a corrosion resistant material or treated to be corrosion resistant, thereby rendering it unnecessary to form a liquid-tight seal between the pump chamber and the inside of the magnet case.

Abstract: A motor driven pump is described having an improved and simplified construction of pump casing and impeller with easy adaptability of the components over a wide range of capacity, an improved construction of the motor stator and rotor with structure which is adaptable for selection for use over a wide range of input, improved structure for alignment and support of the motor stator and of the motor rotor, adequate provisions for cooling and for pressure balancing and which may be made explosionproof, if desired.

Abstract: The present invention relates to magnetic support of the rotor structure in vacuum pumps, particularly turbomolecular pumps. This magnetic support eliminates the requirements for bearing lubricants, and the consequent degradation of the vacuum to be produced by lubricant vapors.

Abstract: An axial flow pump having a rotor pivotally supported on a spherical bearing surface where the rotor has axial impeller blades thereon arranged so that in operation of the pump, hydraulic forces will press the rotor onto the bearing surface.

Abstract: A geothermal energy transfer and utilization system makes use of thermal energy stored in hot solute-bearing well water to generate super-heated steam from an injected flow of clean water; the super-heated steam is then used for operating a turbine-driven pump at the well bottom for pumping the hot solute-bearing water at high pressure and in liquid state to the earth's surface, where it is used by transfer of its heat to a closed-loop boiler-turbine-alternator combination for the generation of electrical or other power. Residual concentrated solute-bearing water is pumped back into the earth. The clean cooled water is regenerated at the surface-located system and is returned to the deep well pumping system also for lubrication of a novel bearing arrangement supporting the turbine-driven pump system.

Abstract: The weight of the rotor of the machine is carried by a liquid lubricated thrust bearing while being guided by one or more gas lubricated centering elements. The thrust bearing is isolated from the rotor casing so that the lubricating liquid cannot contaminate the pumped gas. The machine is constructed for ratings in excess of 500 kw.

Abstract: A glandless pump and wet motor unit for circulating water in a boiler has an axially movable shaft which is rotatable in a liquid-filled housing of the motor and carries a disk disposed between electromagnets which are energizable to produce an electromagnetic field serving to maintain the shaft through magnetic bearings in a selected axial position when the electromagnets are energized. At least one mechanical auxiliary thrust bearing is provided in the housing and becomes effective in response to deenergization of the electromagnets. The auxiliary bearing may be a Kingsbury bearing which is spaced apart from the electromagnetic thrust bearing, or the auxiliary bearing may include the disk which cooperates with adjacent surfaces of the electromagnets or with adjacent surfaces of the housing when the shaft is subjected to axial stresses while the electromagnets are deenergized.

Abstract: A centrifugal compressor for use in turbo-refrigerators, for example, has a motor casing frame section in which a drive motor is accomodated and a gear casing frame section in which a multiplying gear mechanism is accomodated. The multiplying gear mechanism is connected at its input side with the drive motor and at its output side with an impeller. The mechanism has a first shaft including a rotor shaft of the drive motor and a gear shaft carrying a multiplying gear and separably connected directly with the rotor shaft, a second shaft mounting the impeller and having a pinion meshing with the speed multiplying gear, and bearings mounted on bearing casing frame sections for supporting the first and second shafts at their opposed ends, respectively. The motor casing frame section, gear casing frame section and bearing casing frame section are integrally formed as a unitary body.