Abstract: A motor/blood pump which axially pumps blood to a patient connected to a heart/lung machine includes a cylindrical pump housing, a rotor located in the housing, at least one impeller blade attached to the rotor, a pair of stator halves mechanically connectable to the outside of the housing and a motor controller electrically connected to the stator halves. The controller electrically actuates the interconnected stator halves to rotatably drive the rotor on a hydrodynamic bearing of the blood in the housing, and the impeller blade axially pumps blood through the housing. Mechanically and electrically interconnectable stator halves enable the reusable stator to be connected to and disconnected from the disposable pump housing without interrupting the blood flow path.

Abstract: A fluid pump with rotary impeller is disclosed which comprises an electromagnetically-driven, bearing-free, seal-free rotary impeller levitated by localized opposed, repulsive, permanent magnetic forces and by fluid forces, or by localized opposed repulsive magnetic forces only. Levitation by localized opposed magnetic or magnetic and fluid forces of an impeller driven by electromagnetic forces eliminates the need for bearings and seals in the driving mechanism. This avoids the heat build-up and leakage associated with other pumping mechanisms, which can be of importance in pumping of physiological fluids such as blood. The levitating forces of the present invention are applied repulsively both axially and radially with respect to the impeller and are auto-adjusting, such that any attempted displacement of the impeller will automatically incur a corrective change in levitating forces.

Abstract: A pumping mechanism featuring integration of a fixed-displacement radial ton pump within an electric drive motor and cooperative operation of a radially inwardly facing piston-actuating cam with a pair of opposing axially inwardly facing spool-valve actuating cams. The piston-actuating cam is effectively the inner surface of the rotating motor rotor, the pistons extending radially from a fixed central body. Consequent benefits of the integrated configuration are greater quietness, compactness, efficiency and corrosion resistance. The external motor unit provides protection, there is a damping effect, and there are fewer parts which are subject to damage or malfunction. Further reductions in noise and leakage are gained by synchronized operation, in terms of fluid pumping, of the spool-valve actuating cams and the piston-actuating cam.

Abstract: A fluid compressor is provided which includes a closed case having a case body with an open end and cover for closing the open end of the case body to house drive compressor sections and therein. The compressor section has a cylinder having an axial line and both ends located on sucking and discharging sides thereof, rotated by the drive section, a rotating body provided with an axial line offset to the axial line and a spiral groove formed on the outer circumference thereof at such a pitch that becomes smaller and smaller as it comes from the sucking side end thereof nearer to the discharging side thereof, and arranged to contact a part of the outer circumference thereof with the inner circumference of the cylinder.

Abstract: An electrically powered engine has a tip-driven fan assembly. The engine includes an electric motor which comprise a rotor mounted on the periphery of the fan assembly and a stator mounted to the frame. Power is supplied to the electric motor by a metal/air battery assembly mounted to the frame and having a cylindrical shape. The fan assembly produces a flow of air with at least a portion of the battery assembly. The battery assembly comprises a plurality of metal/air battery cells each having a cylindrical anode, a cylindrical cathode with insulating spacers forming an annular chamber for holding the battery electrolyte.

Abstract: A compressor includes a cylinder, and a rotating body located in the cylinder, and a helical groove formed on the outer periphery of the rotating body. A helical blade is fitted in the groove and divides the space between the inner periphery of the cylinder and the outer periphery of the rotating body into operating chambers which have volumes gradually decreasing with distance from one end of the cylinder. The helical blade has dimensions satisfying the following formula:(1+.mu..sup.2) (.alpha./.beta.)<(L+.mu.B)in whichB: axial width, T: radial height, L: exposed height, and .mu.: frictional coefficient, and in which.alpha.=(B.sup.2 +2TL-L.sup.2)/2 +{-B.sup.2 (1-.mu..sup.2)+.mu.BT+.mu..sup.2 TL}/(1-.mu..sup.2).beta.=T-L+{.mu.B(1+.mu..sup.2)+(2.mu.(.mu.(.mu.T-B)}/(1-.mu..sup.2).

Abstract: In a fluid compressor, a cylinder is arranged within a sealed casing. A piston having a spiral groove is placed within the cylinder. The piston is made eccentric to the cylinder such that part of the piston is put in contact with the inner peripheral surface of the cylinder. The piston and the cylinder are rotated relative to each other. A spiral blade is fitted in the spiral groove. The blade is put in contact with the inner peripheral surface of the cylinder, and forming a plurality of working chambers. The blade freely projects from and retreats in the groove. A fluid to be compressed is sucked in the working chambers. The compressed fluid is discharged from a discharge hole portion into the sealed casing. A support mechanism supports the cylinder and one of bearing members for supporting shaft portions of the piston. The support mechanism receives the lubricating oil mixed in the high-pressure compressed fluid discharged from the discharge hole portion.

Abstract: A homoplanar brushless electric gerotor (10) includes a housing assembly (32) defining a substantially closed cavity (52), a fluid inlet port (88). Inner and outer gerotor pump gears (72,74), are eccentrically disposed for relative rotation within the cavity whereupon a working fluid received at the inlet port at a low pressure is discharged from the outlet port at a high pressure. A plurality of alternatingly radially polarized circumferentially aligned permanent magnets (76) are carried by one of the pump gears for rotation therewith. A stator including windings (44) circumferentially distributed and axially spaced from the permanent magnets (76) electromagnetically interact therewith to effect their rotation upon the electrical energization of the windings (44) by a drive circuit (26).

Abstract: An electric-motor hydraulic pump includes a housing having a stationary internal shaft. A pair of cylinder blocks are rotatably carried by the shaft within the housing, and an array of pistons are slidably disposed with each cylinder block. A yoke plate is mounted within the housing and engages the pistons for determining displacement of the pistons within the cylinder blocks. Fluid inlet and outlet ports are provided in the housing and are coupled to the cylinder blocks. An induction motor includes a rotor carried by the cylinder block for corotation therewith, and a stator mounted within the housing surrounding the rotor. An electronic controller for controlling outlet fluid pressure and flow from the pump includes a plurality of sensors mounted on the housing for sensing operating characteristics of the pump and motor to provide electronic sensor signals as functions thereof.

Abstract: A compressor having a cylinder and a cylindrical rotational body housed within the cylinder. A spiral groove is formed in the outer peripheral surface of the rotational body, and a spiral blade is fitted in the groove so as to be freely retreated in and projected from the groove in the radial direction of the rotational body. The cylinder and the rotational body are rotated relative to each other by a drive mechanism. A fluid to be compressed is introduced into working chambers defined by the blade, the inner peripheral surface of the cylinder and the outer peripheral surface of the rotational body. The fluid is first guided into the first working chamber from a gas suction port, and then into the second and subsequent working chambers successively, whereby the fluid is compressed. An oil supply mechanism supplies pressurized oil to an oil supply hole formed in the rotational body.

Abstract: A compressor has a cylindrical casing unit having at least one open end. A compression element includes a circular cylinder held in the casing unit, a cylindrical rotating body having at least one spiral groove on its outer periphery and eccentrically arranged in the cylinder, and a spiral blade wrapped on the rotating body and fitted in the spiral groove in a manenr to be freely displaceable relative to the spiral groove. The cylinder and rotating body are journaled in a bearing means. A frame includes a cylindrical section intimately inserted into an open end of the casing unit and a disc section blocking the cylindrical section and provided orthogonal to an axis of the cylindrical section, the frame blocking the open end of the casing unit and supporting the bearing means.

Abstract: The Oldam-ring of the rotational force transmitting mechanism of a fluid compressor is engaged with the rectangular section formed on the base portion of the main shaft of the rotary rod in the direction perpendicular to the axial direction of the main shaft to achieve an easy assembling of the Oldam-ring to the rectangular section. If the fluid compressor employs a thrust force canceling system wherein the thrust force acting on the rotary rod from the discharge side toward the suction side of a cylinder is canceled by a counter thrust force, the diameter of the main shaft located at the suction side is increased compared with that of the conventional fluid compressor to increase the counter thrust force acting on the edge surface of the main shaft whereby the thrust force can be effectively canceled.

Abstract: A brushless DC motor has a rotor with impeller blades mounted thereon to pump blood through the central portion of the motor. Over a portion of its length, the rotor has a cylindrical surface that is spaced from a cooperating cylindrical surface on the motor stator. There is a gap between these cylindrical surfaces through which there is a leakage flow of blood. The relative motion between the cylindrical surfaces provides a hydrodynamic bearing that suspends the rotor in the stator.

Abstract: A turbo pump is disclosed, having a magnetically supported impeller. The turbo pump includes a casing (31) made of a non-magnetic material, an impeller (32) provided in the casing (31), a triaxial controlled magnetic bearing provided outside of the casing (31) for magnetically supporting the impeller (32), and a rotor (37) magnetically coupled to the impeller (32) for rotating the impeller. The triaxial controlled magnetic bearing includes a magnetic member (35) provided on one plane of the impeller and a plurality of electromagnets (39) provided in the casing in such a way as to be opposed to the magnetic member. Coupling between the impeller (32) and the rotor (37) is effected by a plurality of permanent magnets (33, 38) respectively provided thereon. In another aspect of the invention, a plurality of stator windings for generating the rotating magnetic field may be provided on the side of the stator in place of rotating means utilizing a magnetic coupling.

Abstract: A combintion flow through pump and motor fluid pump delivery and metering system comprises a combination pump and motor housing defining a flow passage extending from and communicating from an inlet to an outlet, including a heat sink section comprising an elongated conduit in heat transfer contact with a mounting plate for electronic controls for absorbing heat therefrom, a pump section defined by an eccentric rotor positive displacement pump having an inlet and an outlet, and a motor section including a brushless D.C. motor coaxially disposed and directly coupled to the eccentric rotor, the motor having a tubular rotor through which a fluid flows and a stator exterior of the housing.

Abstract: A fluid compressor includes a closed case and a cylinder which is arranged in the case and has two opposite ends. A columnar rotating rod is located in the cylinder to be eccentric thereto, and rotatable along with the cylinder. The rod has a spiral groove on the outer circumferential surface thereof, and a spiral blade is fitted in the groove to divide the space between the rod and the cylinder into a plurality of operating chambers. The ends of the cylinder are rotatably supported by first and second bearings. The first bearing is secured to the casing. A drive unit for rotating the cylinder and rod includes a rotor fixed to the cylinder. The rotor has the center of gravity which is apart from the middle of the cylinder in its axial direction toward the first bearing.

Abstract: A fluid compressor includes a cylinder having first and second discharge ends, in which a rotating rod is rotatably arranged. First and second spiral grooves are formed on the outer circumference of the rod, and first and second spiral blades are fitted into the grooves. The first groove has a first starting end located in the middle portion of the rod, and extends from the starting end toward the first discharge end. The second groove has a second starting end located in the middle portion of the rod, and extends from the second starting end toward the second discharge end. The first and second starting ends are set apart from each other by a certain angle in the circumferential direction of the rod. Operating fluid is introduced into the middle portion in the cylinder, and fed to the first and second discharge ends of the cylinder through operating chambers defined by the first and second blades in the cylinder.

Abstract: A pump for conveying liquids and gases is formed by a drive motor having a stator (1) and a rotor (2). Helically shaped conveying grooves (3) are formed in the rotor (2) so that the rotor also serves as the shaft for the pump.

Abstract: The impellor of a blood pump is supported by permanent magnets on the impellor and pump housing and stabilized by an electromagnet on the housing. A control circuit supplies current to the electromagnet to maintain the axial position of the impellor at a control position in which the impellor is in mechanical equilibrium under permanent magnet forces and static axial forces on the impellor to minimize energy consumption in the support of the impellor. The impellor is rotated magnetically and stator coils in the housing are supplied with electric currents having a frequency and amplitude adjusted in relation to blood pressure at the pump inlet to match the flow characteristics of the pump to physiological characteristics of the natural heart. A cavity is formed in the impellor to match the average specific gravity of the impellor and portions of the suspension and drive systems thereon to the specific gravity of blood to further minimize power consumption by the pump.

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 piston is eccentrically arranged in a cylinder along its axial direction and can be rotated relative to the cylinder. Part of the piston is in contact with the cylinder's inner surface. First and second helical grooves are formed in the piston's outer surface and separated at its central portion, the pitches of the grooves being gradually increased from both end portions to the center portion of the piston. First and second blades are inserted in first and second grooves so as to be moved in and out of the grooves with the outer edges of the blades contacting the inner surface. The blades partition a space between the cylinder and the piston into a plurality of operation chambers with volumes corresponding to the gradual pitch increases.

Abstract: A fluid pump with rotary impeller is disclosed which comprises an electromagnetically driven rotary impeller levitated by localized opposed fluid forces. Levitation by localized opposed fluid forces of an impeller driven by electromagnetic forces eliminates the need for bearings and seals in the driving mechanism. This avoids the heat build-up and leakage associated with other pumping mechanisms, which can be of importance for pumping of physiological fluids such as blood. The levitating fluid forces of the present invention are auto-adjusting, such that any attempted displacement of the impeller will automatically incur a corrective change in levitating fluid forces. However, fluid force sensors and regulators could be incorporated into the present invention if desired. The invention should be of use in numerous medical and non-medical applications where the benefits of impeller levitation by localized fluid forces are apparent.

Abstract: A fluid compressor includes a cylinder and a columnar rotary rod. The rod is arranged in the cylinder so as to extend in the axial direction thereof and be eccentric thereto, and orbitable relative to the cylinder without rotation with respect to the cylinder while part of the rod is in contact with the inner circumferential surface of the cylinder. A spiral groove is formed on the outer circumference of the rod and a spiral blade is fitted in the groove. The space between the outer circumference surface of the rod and the inner circumference surface of the cylinder is divided by the blade into a plurality of operating chambers. The groove has an overall length larger than that of the blade by a predetermined length so that the blade is displaceable relative to the rod in the radial and circumferential directions of the rod without sliding on the inner circumferential of the cylinder.

Abstract: Multi-functional rotary hydraulic machines and machine systems combining a common rotary drive system with a family of mechanically interchangeable rotary hydraulic machine units having different hydraulic functions.The machines have a static outer casing mounting a prime mover. The prime mover comprises a stator assembly and a rotor assembly. The stator assembly is mounted within and encased by the static outer casing. The rotor assembly comprises a pair of half-shafts by which the rotor assembly is rotatably mounted within the stator assembly. The rotor assembly further comprises mounting and coupling means by which a selected one of a plurality of mechanically interchangeable rotary hydraulic machine units is mounted within and coupled to the rotor assembly for rotation therewith. The rotary hydraulic machine units each have a different hydraulic function. Numerous different hydraulic machine units are described.The machine system of the invention allows a hydraulic versatility not previously possible.

Abstract: A circumferentially supported fan assembly for drawing cooling air through a radiator of a vehicle is described. The fan includes a fan ring extending circumferentially around the periphery of the fan, the blades of the fan extending from a central region to the fan ring. The entire weight of the fan is borne by a fan support assembly which extends around the periphery of the fan ring, outside the path of air flowing through the fan. The fan is the rotor of an electrically driven motor. A rotor flange of the fan ring extends transverse to the axis of the rotation of the fan, providing a greater torque advantage for the motor. An electrical control circuit selectively controls the speed of the fan to maintain the liquid temperature of the radiator below a selected threshold value. As additional cooling is required, the electronic controller gradually and smoothly increases the power drawn from the engine to turn the fan to increase its speed towards a selected speed.

Abstract: An implantable blood pump (10) for providing either continuous or pulsatile blood flow to the heart. The pump includes a stator (16) having a cylindrical opening (14), an annular array (36 or 38) of electromagnets (40, 42) carried by the stator concentric with the cylindrical opening and lying in a plane transverse to the axis (26) of the opening, a bearing (28) carried by the stator and extending across the cylindrical opening, and a rotor (12) supported by the bearing for rotation about the axis of the cylindrical opening, the rotor being in the form of an Archimedes screw and having a permanent magnet (48) in its periphery which lies in the same plane as the array of electromagnets. A controller (44) is provided which is capable of causing the array of electromagnets to be sequentially energized to cause the rotor to rotate.

Abstract: In order to compensate for the torque component generated by the main rotor f a helicopter, the helicopter engine turns a tail rotor while it is turning the main rotor. Tail rotors, while essential components, take power from the engine, introduce a drag force, add weight, and increase rotor noise. Since the engine is as close as possible to the main rotor, the complexity, number of parts, weight and efficiency of the remote tail rotor have gone unchanged. By this invention, those parts, and hence their added weights, have been eliminated. A self-driving tail rotor for a helicopter is provided herein.

Abstract: A fluid compressor includes a cylindrical casing, a cylinder arranged in the casing to be rotatable and coaxial with the casing, and a columnar rotary body located in the cylinder and extending in the axial direction of the cylinder. A spiral groove is formed on the outer circumferential surface of the rotating body. A spiral blade is fitted into the groove and divides the space between the inner circumferential surface and the outer circumferential surface into a plurality of operating chambers which have volumes gradually decreasing with a distance from one end of the cylinder. When the cylinder and rotary body are relatively rotated by a motor section, a fluid, introduced into the one end of the cylinder, is transferred toward the other end of the cylinder through the operating chambers and compressed during the transfer.

Abstract: A fluid compressor includes cylinder, and a cylindrical rotating body located in the cylinder. One end of the cylinder is rotatably supported by a first bearing fixed to a case and the other end of the cylinder is slidably fitted with a second bearing. The second bearing is coupled with the first bearing through a support shaft which extends through the cylinder and rotatably supports the rotating body. A spiral groove is formed on the outer circumferential surface of the rotating body. A spiral blade is fitted into the groove and divides the space between the inner circumferential surface and the outer circumferential surface into a plurality of operating chambers which have volumes gradually decreasing with a distance from one end of the cylinder. When the cylinder and rotating body are relatively rotated, a fluid, introduced into the one end of the cylinder, is transferred toward the other end of the cylinder through the operating chambers and compressed during the transfer.

Abstract: The impellor of a blood pump is supported by permanent magnets on the impellor and pump housing and stabilized by an electromagnet on the housing. A control circuit supplies current to the electromagnet to maintain the axial position of the impellor at a control position in which the impellor is in mechanical equilibrium under permanent magnet forces and static axial forces on the impellor to minimize energy consumption in the support of the impellor. The impellor is rotated magnetically and stator coils in the housing are supplied with electric currents having a frequency and amplitude adjusted in relation to blood pressure at the pump inlet to match the flow characteristics of the pump to physiological characteristics of the natural heart. A cavity is formed in the impellor to match the average specific gravity of the impellor and portions of the suspension and drive systems thereon to the specific gravity of blood to further minimize power consumption by the pump.

Abstract: The rotating parts of a vehicle engine water pump are assembled directly upon the engine block so that the block forms the pump housing. The pump parts include a drive wheel, such as a pulley or sprocket wheel, mounted upon one end of a drive shaft, with a pump impeller mounted upon the opposite end of the shaft. An open cavity is formed in the block to receive the impeller. A cover, having a central opening through which the shaft extends, covers the impeller and cavity and is sealed against the block, around the cavity, so that the cover and block together form a complete, sealed housing. The shaft is rotatably connected to the block, within the cavity, and the drive wheel is located on the outside of the cover, adjacent the block, for connection to a belt or chain from the power supply.

Abstract: An implantable ventricular assist system uses a small high-speed axial flow blood pump which may be grafted into the patient's circulatory system. The pump includes a blood tube in which the pump rotor and stator are coaxially contained, and a motor stator surrounding the blood duct. A permanent magnet motor rotor is integral with the pump rotor. Purge fluid for the hydrodynamic bearings of the device and power for the motor are preferably percutaneously introduced from extracorporeal sources worn by the patient. The purge fluid is introduced into the pump stator blades. This construction avoids the creation of discontinuities in the blood path wall due to the routing of drive power and/or fluid supply elements through the blood path wall. The described construction greatly reduces the size of the implant needed for a given blood flow rate and enhances its physiological compatibility with the body.

Abstract: A rolling rotor motor/compressor has a stator/cylinder with an internal rotor/piston. The stator/cylinder and rotor/piston together define a chamber and a vane extends into this chamber when the device is compressor. The rotor/piston has a pair of axially extending shafts and a pair of counterweights coact with the shafts for balancing while permitting radial movement of the rotor/piston within the stator/cylinder. This permits unloading of the compressor such as when there is a liquid slug.

Abstract: The displacement machine includes a casing (1) closed by an end plate (2) and accommodating a rotor with displacement surfaces with which a seal is engaged in form-locking manner to co-rotate therewith. The displacement surfaces sealingly engage a hollow (5) which defines the working space and is concentric to the rotational axis (3) of the rotor whereby the hollow (5) is provided in the rotor-facing end face (6) of the casing (1). The end face (6) defines with the rotational axis (3) of the rotor an angle deviating from 90.degree.. The rotor is a displacement body (4) filling out and covering the hollow (5) with at least one recess according to a section along an axis parallel plane or curved area intersecting the hollow (5) wherein the surface parts of the displacement body (4) projecting into the hollow (5) define the displacement surfaces (4a). Arranged in each recess is a sealing element (7) which bears against the displacement surfaces (4a) along a sealing line.

Abstract: A compressor includes a cylinder, and a rotating body located in the cylinder. A spiral groove is formed on the outer periphery of the rotating body. A spiral blade is fitted in the groove and divides the space between the inner periphery of the cylinder and the outer periphery of the rotating body into operating chambers which have volumes gradually decreasing with distance from one end of the cylinder. When the cylinder and rotating body are relatively rotated, a fluid, introduced into the one end of the cylinder, is transported toward the other end of the cylinder through the operating chambers. A pair of bearings rotatably supports both ends of the cylinder and rotatably supports the corresponding ends of the rotating body. One of the bearings is supported by a support mechanism to be movable in the radial direction of the cylinder relative to a closed case which houses the above components therein.

Abstract: A compressor includes a cylinder, and a rotary rod arranged in the cylinder. A spiral groove is formed on the outer periphery of the rotary rod. The spiral groove is formed such that its depth direction extending from the bottom of the groove to the opening thereof is inclined at a predetermined angle toward a discharge side of the cylinder with respect to the axis of the rotary rod. Pitches of the spiral groove are gradually narrowed with distance from the suction-side end of the cylinder. A spiral blade is fitted in the spiral groove to be slidable in the depth direction. The blade divides a space between the outer periphery of the rotary rod and the inner surface of the cylinder into a plurality of working chambers. When the cylinder and rotary rod are relatively rotated, a fluid, introduced into the suction-side end of the cylinder, is transported toward the discharge-side end of the cylinder through the working chambers.

Abstract: A compressor includes a cylinder, and a rotating body located in the cylinder. A spiral groove is formed on the outer periphery of the rotating body. A spiral blade is fitted in the groove and divides the space between the inner periphery of the cylinder and the outer periphery of the rotating body into operating chambers which have volumes gradually decreasing with distance from one end of the cylinder. When the cylinder and rotating body are relatively rotated, a fluid, introduced into the one end of the cylinder, is transported toward the other end of the cylinder through the operating chambers.

Abstract: Rotary positive displacement machine for a compressible working fluid comprising two tapered, internally intermeshing members (26, 28) with eccentric axes (48, 50). The members (26, 28) have spiral grooves (34, 38) and intervening lands (36, 40) which cooperate to form closed chambers (66) varying in volume while moving axially from one end to the other. The inner member (28) has a hypocyclic movement in relation to the outer member (26). The radial depth of the grooves (34, 38) varies axially along the members (26, 28) and in each transverse plane is equal to twice the eccentricity of the axes (48, 50) of the members (26, 28) and the pitch angle of the spiral at the pitch cone varies continuously in the axial direction.

Abstract: A pump or compressor unit (1) suited particularly for mixed phase fluids, e.g. mixed gas and oil, has a multistage axial flow compressor device with contra-rotating vanes. An upstream mixer device (10) and a downstream centrifugal impeller device (32) can each be driven by the compressor device (21, 26, 27, 29), which may be shaped to provide a flow passage of decreasing cross-section in the flow direction. The compressor drives may be supplied by axially adjacent electric motors (24, 25) which may surround rotating sleeves (21) carrying the compressor vanes. A fluid can be circulated through the unit, e.g. for electrical insulation, and may be leaked into the pump fluid through seals, when it may contain a corrosion inhibiting agent. The unit may be arranged to be movable along a pipeline under fluid pressure to engage power supply contacts at a predetermined location.

Abstract: A submersible electric propulsion motor includes a sealed cylindrical stator housing defining a central flow passage and a cylindrical rotor core disposed within the stator housing passage such that the stator housing encompasses the rotor core. The rotor core defines a center flow opening which communicates with inlet and outlet ends of the stator housing passage. The motor also includes a propulsion propeller having a plurality of radial blades and a central cylindrical hub. The propeller is disposed within and across the rotor core opening with its periphery being rigidly connected to the rotor core. A support structure has end portions disposed at and rigidly attached to the stator housing inlet and outlet ends, and an axial portion which extends axially through the stator housing passage and rotor core opening and is rigidly attached to the radial portions.

Abstract: A compressor includes a closed casing having a suction chamber and a discharge chamber. A rotating member is arranged in the casing and has a spiral bore extending along the axis of rotation of the rotating member. The bore has first and second end openings communicating with the suction and discharge chambers, respectively. A spiral internal member is inserted into the bore to rotate relative to the rotating member as the rotating member is rotated by an electric motor section in the casing. In conjunction with an inner surface of the bore, the internal member defines a plurality of closed spaces moving from the first end opening to the second end opening. A fluid in the suction chamber is transported from the first end opening to the second end opening while confined within the spaces, and is then discharged into the discharge chamber. The discharge of the fluid is controlled by a valve mechanism.

Abstract: An implantable axial flow blood pump maximizes the blood flow while minimizing the dimensions of the pump. By magnetically suspending a rotor of relatively small diameter coaxially in a cylindrical blood conduit of substantially larger inner diameter, an adequate flow area through the pump is provided, and the need for bearings, lubrication and seal purging fluid is eliminated. This is made possible by the use of neodymium-boron-iron rotor magnets which allow a substantial gap between the static motor armature and the rotor. The rotor is simultaneously torqued and maintained in a position coaxial with the blood conduit by individually varying the current in the armature windings while they are being commutated. The position of the rotor axis is accurately sensed by placing magnetically permeable strips into opposite ends of the pump stator blades in such a manner that they transmit to Hall sensors variations in an annular magnetic field surrounding the rotor adjacent the ends of the pump stator blades.

Abstract: A coating material is transferred to the surface of a spreader-roll from a spreader-mechanism. The spreader-roll is partly wrapped by a strip of material. In the location where the said strip of material is lifted off the spreader-roll, a doctor-element, comprising a doctor-blade, is arranged to rest tangentially on the spreader-roll. The doctor-element thereby forms a rubbing distributing surface which faces the strip of material and ensures a smooth and uniform coating of the coating material on the strip of material. The strip of material is then carried away over a sharp tear-off edge on the doctor-element at an angle of less than 20.degree.. In this way a coating of any desired thickness may be applied to a strip of material, more particularly as a coating for a strip of paper.

Abstract: An electric motor driven inline hydraulic apparatus comprises a common housing, a stationary shaft mounted in said housing and spaced pump cylinder block subassemblies that rotate around and are mounted on said shaft. Each subassembly includes a cylinder block and a plurality of circumferentially spaced pistons. The cylinder block subassemblies are positioned such that the pistons of one subassembly extend toward the other subassembly. A common yoke plate is mounted between the two cylinder blocks and bears the two groups of piston shoes, one on each of its two bearing surfaces. Each cylinder block is driven independent of and in direction opposite to the other by an electric motor integrally mounted such that its hollow rotor houses the block and drives it. All components described above are contained in one housing and operate submerged in hydraulic fluid.

Abstract: A novel pump apparatus and method, the pump including a magnetically suspended and rotated impellor inside the pump housing. A novel sensor system detects the position of the impellor and thus provides the necessary information for operation of a suspension circuit for magnetically suspending the impellor. A valve member may be included as part of the impellor to prevent reverse flow in the event of impellor failure when used as a ventricular assist device.

Abstract: A fan unit for cooling an internal combustion engine comprising a fan impeller associated with a coaxial channel for guiding the air travelling through said impeller and an electric driving motor of DC type. The channel is fixed to the ends of the blades of the impeller and rotates with the impeller and itself constitutes the rotor of the electric motor whose stator coaxially surrounds at least a part of the channel. The stator is rigid with a fixed shaft around which the impeller rotates. This fan unit has a high permeability when inoperative so that it is particularly adapted for use in an automobile vehicle.

Abstract: A pump for forcedly feeding kerosene or like fluid comprises a rotor, a housing rotatably accommodating the rotor, a stator for forming a rotary magnetic field to rotate the rotor, and a fluid feeding portion. When the rotor is a disk, spiral grooves providing the feeding portion are formed in the rotor and/or a housing wall opposed to the rotor. When the rotor is tubular, a helical groove or grooves are formed in the outer surface of a fixed shaft serving as part of the housing and/or in the inner peripheral surface of the rotor to provide the feeding portion. The pump properly feeds the fluid at widely varying flow rates including a very small rate free of any leak and without producing a loud noise. The pump, including a motor as a component, is compact, thin and simple in construction.

Abstract: The pump comprises a pump stator (5), an electric motor stator (4), and a rotor (6) that constitutes the rotor both of the pump and of the electric motor. The pump stator comprises a tubular non-magnetic lining to the electric motor stator, and the rotor is mounted excentrically inside said tubular lining and is equipped with radially movable vanes (63) that co-operate with said lining to provide pumping action when the rotor rotates. The arrangement is particularly applicable to oil-sealed vacuum pumps, and has the advantage of being more compact than units of similar performance, but equipped with a pump and a motor that are separate and interconnected by a mechanical coupling, as is conventional practice.

Abstract: A sliding vane compressor for use in refrigeration systems includes a rotatable hollow shaft, a cylindrical compressor rotor which surrounds the shaft, end covers enclosing the compressor rotor and a pair of vanes disposed within the rotor to compress a working medium entering the rotor. The compressor rotor and end covers have end faces in a contact area therebetween. At at least one of end faces of either rotor or end cover, a number of spirally-shaped grooves are formed curved in the direction of rotation of the rotor shaft. These grooves extend from the periphery of the respective end face toward the center thereof but short of said center to produce a flow preventing leakage of the working medium between the low pressure region and the high pressure region in the compressor.

Abstract: The disclosure concerns a hydroelectric machine including a tube-type hydraulic machine having a bladed wheel which rotates about a horizontal axis and is provided with fixed blades which are encircled by, and connected with, a rim to which the rotor of a surrounding electrical machine is attached. The wheel, rim and rotor form a single rotating unit which is supported in the radial direction without physical contact by at least two hydrostatic centering supporting devices and at least one hydrostatic damping device. At least one hydrostatic load-beaing device may be included for accepting without physical contact a constant portion of the weight of the rotating unit. In addition, the machine may include hydrostatic supporting devices, of the centering type or of both the centering and the damping type, for accepting without physical contact the axial thrusts imposed on the rotating unit.