# US 11,998,729 B2 · Motor assembly with heat exchanger for catheter pump > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,998,729 B2 - Document ID: US11998729B2 - Status: Granted - Kind: B2 - Application number: 17/107,387 - Filed: 2020-11-30 - Published: 2021-03-18 - Granted: 2024-06-04 - Earliest claimed: 2015-01-22 - Assignees: Tc1 LLC - Applicants: Tc1 LLC - Inventors: Adam R. Tanner; Michael R. Butler; Todd Jenkins - Web page: https://patentgrep.com/patent/US11998729B2 ## CPC - 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 60/13: by means of a catheter allowing explantation, e.g. catheter pumps temporarily introduced via the vascular system - A61M 60/148: in line with a blood vessel using resection or like techniques, e.g. permanent endovascular heart assist devices - A61M 60/216: including a rotating member acting on the blood, e.g. impeller - A61M 60/237: the blood flow through the rotating member having mainly axial components, e.g. axial flow pumps - A61M 60/414: transmitted by a rotating cable, e.g. for blood pumps mounted on a catheter - A61M 60/422: the force acting on the blood contacting member being electromagnetic, e.g. using canned motor pumps - A61M 60/808: specially adapted for deformable impellers, e.g. expandable impellers - A61M 60/865: Devices for guiding or inserting pumps or pumping devices into the patient's body - A61M 60/829: having a purge fluid supply - A61M 2205/3317: Electromagnetic, inductive or dielectric measuring means - A61M 2205/3368: Temperature - A61M 2205/3606: cooled - A61M 2205/3666: using heat loss of a motor - A61M 2205/42: Reducing noise - 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)} ## Abstract A catheter pump is disclosed. The catheter pump can include an impeller and a catheter body having a lumen therethrough. The catheter pump can also include a drive shaft disposed inside the catheter body. A motor assembly can include a chamber. The motor assembly can include a rotor disposed in the at least a portion of the chamber, the rotor mechanically coupled with a proximal portion of the drive shaft such that rotation of the rotor causes the drive shaft to rotate. The motor assembly can also comprise a stator assembly disposed about the rotor. The motor assembly can also include a heat exchanger disposed about the stator assembly, the heat exchanger may be configured to direct heat radially outward away from the stator assembly, the rotor, and the chamber. ## Claims ### Claim 1 A catheter pump system comprising: a catheter assembly; a motor assembly including a stator assembly and a rotor disposed radially with the stator assembly, the motor assembly coupled to the catheter assembly, the motor assembly including: a shaft assembly; a flow diverter disposed at least partially radially between the stator assembly and the rotor, the flow diverter located about the shaft assembly, the flow diverter having a proximal end and a distal end; a first flange coupled to the proximal end of the flow diverter; and a second flange coupled to the distal end of the flow diverter; wherein the first flange and the second flange each respectively include a vibration damping element. ### Claim 2 (depends on 1) The catheter pump system of claim 1, wherein the first flange includes a first opening and the second flange includes a second opening, and wherein the shaft assembly extends through at least one of the first opening and the second opening. ### Claim 3 (depends on 1) The catheter pump system of claim 1, wherein the first flange comprises an inner flange portion and an outer flange portion, the inner flange portion radially spaced apart from the outer flange portion and defining an annular gap. ### Claim 4 (depends on 3) The catheter pump system of claim 3, wherein the damping element of the first flange is disposed within the annular gap. ### Claim 5 (depends on 4) The catheter pump system of claim 4, wherein the damping element comprises one of a rubber material, an elastomer material, a polymer material, or a spring. ### Claim 6 (depends on 1) The catheter pump system of claim 1, further comprising a housing disposed at least partially about the motor assembly, the housing configured to at least partially enclose the motor assembly. ### Claim 7 (depends on 6) The catheter pump system of claim 6, wherein the first flange and the second flange are coupled to the housing. ### Claim 8 (depends on 7) The catheter pump system of claim 7, wherein damping elements reduce a mechanical vibration of the housing. ### Claim 9 (depends on 1) The catheter pump system claim 1, further comprising a grommet disposed about the catheter assembly in a spaced relation from the first and second flange, wherein the grommet reduces mechanical vibration of the shaft assembly in operation. ### Claim 10 (depends on 1) The catheter pump system of claim 1, further comprising a housing disposed at least partially about the motor assembly and a strain relief system, the strain relief system coupled to the housing, wherein the strain relief system includes at least one channel for collecting and securing one or more electrical wires of the motor assembly externally of the housing to reduce displacement of the electrical wires during a percutaneous medical procedure. ### Claim 11 A motor assembly of a catheter pump system having a stator assembly and a rotor disposed radially with the stator assembly, the motor assembly comprising: a shaft assembly; a flow diverter disposed at least partially radially between the stator assembly and the rotor, the flow diverter located about the shaft assembly, the flow diverter having a proximal end and a distal end; a first flange coupled to the proximal end of the flow diverter; and a second flange coupled to the distal end of the flow diverter; wherein the first flange and the second flange each respectively include a radially extending vibration damping element. ### Claim 12 (depends on 11) The motor assembly of claim 11, wherein the first flange includes a first opening and the second flange includes a second opening, and wherein the shaft assembly extends through at least one of the first opening and the second opening. ### Claim 13 (depends on 11) The motor assembly of claim 11, wherein the first flange comprises an inner flange portion and an outer flange portion, the inner flange portion radially spaced apart from the outer flange portion and defining an annular gap. ### Claim 14 (depends on 13) The motor assembly of claim 13, the radially extending vibration damping element within the annular gap of the first flange. ### Claim 15 (depends on 14) The motor assembly of claim 14, wherein the radially extending damping element comprises one of a rubber material, an elastomer material, a polymer material, or a spring. ### Claim 16 (depends on 11) The motor assembly of claim 11, further comprising a housing disposed at least partially about the motor assembly, the housing configured to at least partially enclose the motor assembly. ### Claim 17 (depends on 16) The motor assembly of claim 16, wherein the first flange and the second flange are coupled to the housing. ### Claim 18 (depends on 17) The motor assembly of claim 17, wherein the radially extending vibration damping elements reduce a mechanical vibration of the housing. ### Claim 19 (depends on 11) The motor assembly of claim 11, further comprising a housing disposed at least partially about the motor assembly and a strain relief system, the strain relief system coupled to the housing, wherein the strain relief system includes at least one channel for collecting and securing one or more electrical wires of the motor assembly externally of the housing to reduce displacement of the electrical wires during a percutaneous medical procedure.