Pumping device, a single-use device and a method for operating a pumping device

Patent metadata

Field	Value
Publication number	US-11619236-B2
Application number	US-202117147846-A
Country	US
Kind code	B2
Filing date	Jan 13, 2021
Priority date	Feb 13, 2020
Publication date	Apr 4, 2023
Grant date	Apr 4, 2023

Abstract

A pumping device includes a single-use device and a reusable device. The single-use device is to be inserted into the reusable device and includes two pump units in series, one behind the other. Each pump unit includes a rotor for a bearingless motor, and can be magnetically levitated and driven without contact for rotation about an axial direction. The reusable device includes a stator for each rotor which form an electromagnetic rotary drive for rotating the rotor about the axial direction. Each stator is a bearing and drive stator with which the rotor can be magnetically driven and levitated without contact with respect to the stator. An independent control device is provided for each stator, and can independently activate a respective stator.

First claim

What is claimed:

1. A pumping device for conveying a fluid, comprising:
a single-use device designed for single use;
a reusable device designed for multiple use,
the single-use device configured to be inserted into the reusable device and comprising two pump units arranged in series one behind the other, each pump unit of the two pump units comprising a rotor configured to convey the fluid, each rotor of the two pump units being a rotor of a bearingless motor, and capable of being magnetically levitated without contact and driven without contact for rotation about an axial direction, the reusable device configured to receive the single-use device and comprising, for each rotor of the two pump units, a stator which forms with a respective rotor an electromagnetic rotary drive configured to rotate the respective rotor about the axial direction, each stator being a bearing and drive stator with which the respective rotor is capable of being magnetically driven without contact and capable of being magnetically levitated without contact with respect to the stator; and
an independent controller for each stator, which is configured to independently activate a respective stator.

2. The pumping device according to claim 1 , wherein the single-use device has two cup-shaped protuberances in each of which one of the rotors of the two pump units is disposed, and the reusable device has two recesses, each of which is configured to receive one of the two cup-shaped protuberances.

3. The pumping device according to claim 2 , wherein the reusable device is configured such that, in an operating state, the rotors of the two pump units of the single-use device each rotate about a respective axis of rotation which encloses with a vertical an angle different from zero, and which is less than 90°.

4. The pumping device according to claim 1 , wherein the two pump units includes a first pump unit and a second pump unit, the first pump unit having a first inlet and a first outlet for the fluid, the second pump unit having a second inlet and a second outlet for the fluid, each inlet of the first and second inlets is configured such that the fluid flows to a respective rotor from the axial direction, and each of the first and second outlets is configured such that the fluid leaves a respective pump unit in a discharge direction which is aligned perpendicular to the axial direction.

5. The pumping device according to claim 4 , wherein the pumping device is configured such that the fluid is diverted between the first outlet and the second inlet by at least 90°.

6. The pumping device according to claim 4 , wherein the pumping device is configured such that the fluid is diverted between the first outlet and the second inlet by a total of 270°.

7. The pumping device according to claim 1 , wherein a separate power supply is provided for each of the stators, so that each of the stators is capable being separately supplied with power.

8. The pumping device according to claim 1 , further comprising a superordinate controller signal-connected to each of the independent controllers for the stators.

9. The pumping device according claim 1 , further comprising an emergency energy store from which energy is capable of being supplied to each stator when a primary energy source configured to supply energy to the stators is no longer capable of providing energy to least one of the two pump units.

10. The pumping device according to claim 1 , wherein the single-use device or the reusable device includes an identification element with which the single-use device and the reusable device are capable of exchanging information with each another.

11. A single-use device designed for single use with a pumping device, and configured to be inserted into a reusable device, the single-use device comprising: two pump units arranged in series one behind the other, each pump unit of the two pump units comprising a rotor configured to convey a fluid, each rotor of the rotors of the two pump units being a rotor of a bearingless motor capable of being magnetically levitated without contact and driven without contact for rotation about an axial direction, and configured to form an electromagnetic rotary drive with a respective stator of the reusable device to rotate the respective rotor about the axial direction, each stator being a bearing and drive stator with which the respective rotor is capable of being magnetically driven without contact and capable of being magnetically levitated without contact with respect to the stator.

12. A method for operating the pumping device according to claim 1 , the method comprising:
setting a predetermined desired value for an operating parameter of the pumping device for each independent control device;
determining, with a sensor, an actual value for the operating parameter; and
transmitting the actual value to each independent control device.

13. The method according to claim 12 , further comprising exchanging signals between the independent control devices so that independent control device of one of the two pump units determines a functioning of the other of the two pump units.

14. The method according to claim 12 , wherein the operating parameter is a flow through the pumping device or a pressure difference generated by the pumping device.

15. The method according to claim 12 , further comprising determining a flow through the pumping device from a rotational speed and a torque with which the rotors of the two pump units are driven.

Assignees

• Levitronix Gmbh

Inventors

• Schöb Reto
• Barletta Natale

Classifications

• A61M60/113 Primary

  in other functional devices, e.g. dialysers or heart-lung machines · CPC title

• F04D13/14

  the pumps being all of centrifugal type {(deviation valves F04D15/0016)} · CPC title

• F04D15/0072

  Installation or systems with two or more pumps, wherein the flow path through the stages can be changed, e.g. series-parallel · CPC title

• H02K7/14

  Structural association with mechanical loads, e.g. with hand-held machine tools or fans (with fan or impeller for cooling the machine H02K9/06) · CPC title

• A61M60/38

  Blood oxygenation · CPC title