The present invention relates to a pump unit (300), with at least one impeller, comprising a coupling, wherein the coupling is mechanically connected to the at least one impeller via an inner rotor and where an outer rotor is connected to an electrical machine arranged to produce a rotational torque, said pump being arranged to circulate a hot fluid by the impeller. The coupling includes an outer rotor including a plurality of permanent magnets (101,201) arranged to form a plurality of magnetic poles (105, 205), and an inner rotor (110, 210), whereby the outer rotor and the inner rotor are located coaxially to one another around an axis (130, 230) and spaced apart from one another by an air gap (150,250). A rotor can (330) is arranged in the air gap (250, 150) between the inner rotor and the outer rotor, so as to make a dividing section between the inner and outer rotor. Each of the plurality of magnetic poles comprises at least a section with a radial magnetic direction in respect of the axis (130, 230) and at least a section with a magnetic direction angled between a radial direction and a tangential direction in respect of the axis (130, 230), wherein the combined length of the sides of the plurality of permanent magnets cover less than 75% of the circumference of the cylindrical structure. The outer rotor has a cylindrical structure (120, 220) surrounding the plurality of magnetic poles (105, 205), and the cylindrical structure is made of a magnetic susceptible material for conducting a magnetic flux between the plurality of magnetic poles (105, 205) The inner rotor (110, 210) is made of a magnetic susceptible material and free from permanent magnetic material, wherein the inner rotor is formed with multiple radial projections (111, 211) acting as salient inner rotor poles distributed around the axis (130, 230) of the inner rotor. The invention also relates to a coupling with the above mentioned coupling features.

The present disclosure relates to a medical pump drive comprising a pump housing and a pump motor provided in the pump housing. The pump drive also includes a rechargeable voltage source for storing electrical energy, or a rechargeable battery, for a voltage supply of the pump motor and a magnetic section for magnetically coupling of further pump sections, and/or for magnetically driving of elements, in particular a magnetically driven pump rotor. The pump also includes an electronic controller. The disclosure further relates to a pump, an induction charging station, a tube set, and a blood treatment apparatus.

A turbine (10) configured to operate in a thermodynamic cycle comprising a working fluid circuit, wherein the turbine comprises an impeller (11) mounted on a first end (20a) of a turbine shaft (20), the impeller being arranged in a housing (12) with a turbine inlet (10a) for the working fluid, wherein a second end (20b) of the turbine shaft is connectable to a shaft of a generator (60) by means of a magnetic coupling (40) for transferring torque from the turbine shaft to the generator shaft, wherein a fluid tight barrier (50) is mounted on the turbine, covering the turbine shaft to seal the turbine from the surroundings, wherein the turbine further comprises at least one fluid bearing (30a, 30b, 30c) arranged on the turbine shaft and in fluid communication with the working fluid circuit to receive working fluid therefrom.

The invention provides a magnetic coupling assembly (1), comprising: a rotatable male coupling member (2) comprising magnets (3); a rotatable female coupling member (4) comprising magnets (5); a static separation member (6) arranged between the male and female coupling members, a first channel (7) in a gap between the male coupling member and the separation member, a second channel (8) in a gap between the female coupling member and the separation member, an axial internal channel (9) in the male coupling member, a magnetic coupling section (10) of the static separation member, wherein said magnetic coupling section is the section of the static separation member between the magnets of the male coupling member and the magnets of the female coupling member, wherein the female and male coupling members are rotatable coupled by the magnets through the magnetic coupling section of the static separation member. The magnetic coupling assembly is distinguished in that: the first channel, the second channel and the axial

Described herein is a system, method of use and Self Retracting Lifeline (SRL) apparatus using a system that governs a dynamic response between members causing a halt in relative motion between the members. Magnetic interactions, eddy current drag forces and centrifugal and/or inertial forces may provide various mechanisms of governing movement.

A dosing apparatus for dosing a product in powder and/or granule form within containers includes a hopper (2) provided with an internal cavity (3) to contain the product, a dosing screw (4) rotatable about, and extending along, a rotation axis (X) inside the hopper and through the internal cavity, and a first driving shaft (5) arranged to rotate the dosing screw; the dosing apparatus also includes a magnetic coupling system (10) to removably connect a first end (6) of the dosing screw (4) to the first driving shaft (5), arranged externally to the hopper (2); the magnetic coupling system includes groups of magnets (21, 22, 23, 24) adapted to magnetically transmit a driving torque from the first driving shaft (5) to the dosing screw (4) and to reversibly fasten, longitudinally along the rotation axis (X), the dosing screw (4) to the first driving shaft (5); the first end (6) of the dosing screw (4) is arranged inside the hopper (2) and the first driving shaft (5) is hermetically separated from the first end (6) of the dosing screw (4) by means of a separation element (8) that is integral with the hopper (2).

An eddy current retarder includes a brake drum, a magnet retention ring, and a switch mechanism. The brake drum is fixed to a rotating shaft. The magnet retention ring is arranged inside the drum and retains magnets at regular intervals entirely in a circumferential direction such that the magnets face the inner peripheral surface of the drum. The switch mechanism includes switch plates that switch, during braking, to a state in which magnetic circuits develop between the magnets and the drum, and switch, during non-braking, to a state in which no magnetic circuits develop. Protrusions are provided on an end face of the drum at regular intervals entirely in the circumferential direction. Electricity generating coils are provided in a non-rotating part of a vehicle at regular intervals entirely in the circumferential direction such that the electricity generating coils face the regions of the end face of the drum.

A magnetically coupled piston pump includes a piston, a pump body, and a set of drive magnets. The piston includes a set of piston magnets. Each piston magnet has poles arranged along a longitudinal axis of the piston, and each piston magnet is arranged in the piston so that the orientation of the poles of each piston magnet is the opposite of the orientation of each adjacent piston magnet. The piston is disposed in and permitted to move within the pump body. The set of drive magnets is arranged outside the pump body. Each drive magnet corresponds to a piston magnet, has poles arranged along the longitudinal axis, and is arranged so that the orientation of the poles is opposite the orientation of the poles of the corresponding piston magnet. A drive unit is coupled to the drive magnets for moving the drive magnets along the longitudinal axis.

A magnetically-coupled torque assist apparatus includes a movable (rotor) magnet configured to rotate about a rotor magnet axis extending through the rotor magnet, and a stationary (stator) magnet. The rotor magnet and the stator magnet have a gap therebetween. There is an equilibrium state position (ESP) of the rotor magnet where forces acting on the rotor magnet are balanced such that the rotor magnet is stationary about the rotor magnet axis. And when the rotor magnet is rotated from the equilibrium state position (ESP) to an elastically stressed state position (SSP), magnetic fields of the rotor magnet and the stator magnet generate a resultant magnetic force on the movable magnet that biases the movable magnet towards the equilibrium state position. In some embodiments, the stator and rotor magnets are configured to create a Halbach-effect magnetic field bloom, which contributes to the magnetic forces.

A magnetic coupling device (1) is provided for coupling a first member (10) and a second member (11), coaxial with each other, so that they can jointly rotate about a common axis and/or translate along such axis or can perform relative rotary and/or translatory movements depending on the intensity of a torque or an axial force applied to one of the members. At least one of the members (10) has axially extending magnetised areas (12) each consisting of a row of axially aligned magnets (12), the magnets (12) in one area (12i) being axially offset relative to the magnets of an adjacent area (12j).