# US 12,005,248 B2 · Rotor bearing system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,005,248 B2 - Document ID: US12005248B2 - Status: Granted - Kind: B2 - Application number: 17/054,884 - Filed: 2019-05-16 - Published: 2021-11-11 - Granted: 2024-06-11 - Earliest claimed: 2018-05-16 - Assignees: Kardion GmbH - Applicants: Kardion GmbH - Inventors: Andreas Vogt; Ingo Stotz; Johannes Bette; Armin Schuelke; Xiang Li; Uwe Vollmer; David Minzenmay - Web page: https://patentgrep.com/patent/US12005248B2 ## CPC - A61M 60/82: Magnetic bearings - A61M 60/13: by means of a catheter allowing explantation, e.g. catheter pumps temporarily introduced via the vascular system - A61M 60/178: drawing blood from a ventricle and returning the blood to the arterial system via a cannula external to the ventricle, e.g. left or right ventricular assist devices - A61M 60/216: including a rotating member acting on the blood, e.g. impeller - A61M 60/419: the force acting on the blood contacting member being permanent magnetic, e.g. from a rotating magnetic coupling between driving and driven magnets - A61M 60/824: Hydrodynamic or fluid film bearings - A61M 60/825: Contact bearings, e.g. ball-and-cup or pivot bearings - F04D 3/00: Axial-flow pumps (priming or boosting F04D9/00) - F04D 13/0606: {Canned motor pumps} - F04D 29/0467: {Spherical bearings} - F04D 29/048: magnetic; electromagnetic - F04D 29/181: {Axial flow rotors (F04D29/185 take precedence)} - F16C 17/10: for both radial and axial load - F16C 17/26: Systems consisting of a plurality of sliding-contact bearings - H02K 7/088: {radially supporting the rotor directly} - H02K 16/005: {Machines with only rotors, e.g. counter-rotating rotors (DC commutator machines or universal AC/DC commutator motors having a rotating armature and a rotating excitation field H02K23/60)} - F16C 2316/18: Pumps for pumping blood - A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)} - F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02) - F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) ## Abstract The invention relates to a rotor bearing system (1). Said system comprises a housing (80) in which a first permanent magnet (30) is mounted such that it can rotate about a first axis (105). A rotor (70) for conveying a liquid comprises a second hollow-cylindrical permanent magnet (40), which is mounted such that it can rotate about a second axis. The first permanent magnet (30) and the second permanent magnet (40) overlap axially at least partially, wherein the first permanent magnet (30) is disposed offset relative to the second permanent magnet (40). In the axial overlap region (160) of the first permanent magnet (30) and the second permanent magnet (40), the housing (80) is positioned between the two permanent magnets (30, 40). A first bearing (20) is configured for the relative axial positioning of the rotor (70) and the housing (80) with respect to one another and for receiving an axial force resulting from the arrangement of the first permanent magnet (30) and the second permanent magnet (40), and a second bearing (10) and a third bearing (90) are configured for receiving radial forces and for positioning the axis of rotation of the second permanent magnet (40). ## Claims ### Claim 1 A heart support system, comprising: a rotor bearing system comprising: a housing, wherein a first permanent magnet is mounted within the housing and configured to rotate about a first axis; a rotor configured to convey a liquid, wherein the rotor comprises a second permanent magnet, wherein the second permanent magnet comprises a hollow-cylindrical permanent magnet and is configured to rotate about a second axis; wherein the first permanent magnet and the second permanent magnet at least partially overlap axially, wherein the first permanent magnet is axially offset relative to the second permanent magnet, wherein the first permanent magnet and the second permanent magnet are arranged to produce an axial force; wherein the housing is positioned between the first permanent magnet and the second permanent magnet in an axial overlap region of the first permanent magnet and the second permanent magnet; a first bearing configured to provide a relative axial positioning of the rotor and the housing with respect to one another and configured to receive the axial force resulting from the arrangement of the first permanent magnet and the second permanent magnet; and a second bearing, wherein the first bearing and the second bearing are configured to receive radial forces and configured to position the second axis of the second permanent magnet. ### Claim 2 (depends on 1) The heart support system according to claim 1, wherein the first bearing is disposed between the housing and the rotor and the second bearing is disposed on the rotor. ### Claim 3 (depends on 1) The heart support system according to claim 1, wherein the first bearing is disposed on the rotor and the second bearing is disposed between the housing and the rotor. ### Claim 4 (depends on 1) The heart support system according to claim 1, wherein the housing is a motor housing comprising a rotatably mounted shaft within an interior of the motor housing, and wherein the first permanent magnet is disposed on the rotatably mounted shaft. ### Claim 5 (depends on 1) The heart support system according to claim 1, wherein the first permanent magnet and the second permanent magnet are arranged coaxially. ### Claim 6 (depends on 1) The heart support system according to claim 1, wherein each of the first permanent magnet and the second permanent magnet comprise at least one pair of poles, wherein the first permanent magnet and the second permanent magnet comprise an equal number of pairs of poles. ### Claim 7 (depends on 1) The heart support system according to claim 1, wherein the axial force resulting from the arrangement of the first permanent magnet and the second permanent magnet is configured to be greater than a hydraulic force acting on the rotor. ### Claim 8 (depends on 1) The heart support system according to claim 1, wherein each of the first permanent magnet and the second permanent magnet comprises at least two axial segments. ### Claim 9 (depends on 1) The heart support system according to claim 1, wherein the first permanent magnet and/or the second permanent magnet comprises a radial, parallel or diametrical magnetization. ### Claim 10 (depends on 1) The heart support system according to claim 1, wherein the first permanent magnet and/or the second permanent magnet comprises a Halbach array. ### Claim 11 A heart support system, comprising: a rotor bearing system comprising: a housing, wherein a first permanent magnet is mounted within the housing and configured to rotate about a first axis; a rotor configured to convey a liquid, wherein the rotor comprises a second permanent magnet, wherein the second permanent magnet is a hollow-cylindrical permanent magnet and is configured to rotate about a second axis; wherein the first permanent magnet and the second permanent magnet at least partially overlap axially, wherein the first permanent magnet is axially offset relative to the second permanent magnet, wherein the first permanent magnet and the second permanent magnet are arranged to produce an axial force; wherein the housing is positioned between the two permanent magnets in an axial overlap region of the first permanent magnet and the second permanent magnet; a first bearing configured to provide a relative axial positioning of the rotor and the housing with respect to one another and configured to receive the axial force resulting from the arrangement of the first permanent magnet and the second permanent magnet; and a second bearing and a third bearing, wherein the second bearing and the third bearing are configured to receive radial forces and configured to position the second axis of the second permanent magnet. ### Claim 12 (depends on 11) The heart support system according to claim 11, wherein the first bearing and the third bearing are disposed between the housing and the rotor and the second bearing is disposed on the rotor. ### Claim 13 (depends on 11) The heart support system according to claim 11, wherein the first bearing and the third bearing are disposed on the rotor and the second bearing is disposed between the housing and the rotor. ### Claim 14 (depends on 11) The heart support system according to claim 11, wherein the housing is a motor housing comprising a rotatably mounted shaft within an interior of the motor housing, and wherein the first permanent magnet is disposed on the rotatably mounted shaft. ### Claim 15 (depends on 11) The heart support system according to claim 11, wherein the first permanent magnet and the second permanent magnet are arranged coaxially. ### Claim 16 (depends on 11) The heart support system according to claim 11, wherein each of the first permanent magnet and the second permanent magnet comprise at least one pair of poles, wherein the first permanent magnet and the second permanent magnet comprise an equal number of pairs of poles. ### Claim 17 (depends on 11) The heart support system according to claim 11, wherein the axial force resulting from the arrangement of the first permanent magnet and the second permanent magnet is configured to be greater than a hydraulic force acting on the rotor. ### Claim 18 (depends on 11) The heart support system according to claim 11, wherein each of the first permanent magnet and the second permanent magnet comprises at least two axial segments. ### Claim 19 (depends on 11) The heart support system according to claim 11, wherein the first permanent magnet and/or the second permanent magnet comprises a radial, parallel or diametrical magnetization. ### Claim 20 (depends on 11) The heart support system according to claim 11, wherein the first permanent magnet and/or the second permanent magnet comprises a Halbach array.