# US 11,298,521 B2 · Methods of manufacturing an impeller > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,298,521 B2 - Document ID: US11298521B2 - Status: Granted - Kind: B2 - Application number: 16/682,269 - Filed: 2019-11-13 - Published: 2020-03-12 - Granted: 2022-04-12 - Earliest claimed: 2013-03-13 - Assignees: Magenta Medical Ltd. - Applicants: Magenta Medical Ltd. - Inventors: Ehud Schwammenthal; Yosi Tuval; Daniel Glozman - Web page: https://patentgrep.com/patent/US11298521B2 ## CPC - A61F 2/07: Stent-grafts - A61B 5/02055: {Simultaneously evaluating both cardiovascular condition and temperature} - A61M 60/13: by means of a catheter allowing explantation, e.g. catheter pumps temporarily introduced via the vascular system - A61M 60/135: inside a blood vessel, e.g. using grafting - A61M 60/237: the blood flow through the rotating member having mainly axial components, e.g. axial flow pumps - A61M 60/33: of kidneys - A61M 60/411: generated by an electromotor - A61M 60/422: the force acting on the blood contacting member being electromagnetic, e.g. using canned motor pumps - A61M 60/523: using blood flow data, e.g. from blood flow transducers - A61M 60/808: specially adapted for deformable impellers, e.g. expandable impellers - A61M 60/81: Pump housings - A61M 60/825: Contact bearings, e.g. ball-and-cup or pivot bearings - A61M 60/833: Occluders for preventing backflow - A61M 60/861: Connections or anchorings for connecting or anchoring pumps or pumping devices to parts of the patient's body - A61M 60/148: in line with a blood vessel using resection or like techniques, e.g. permanent endovascular heart assist devices - A61M 60/414: transmitted by a rotating cable, e.g. for blood pumps mounted on a catheter - A61M 60/896: having flexible or resilient parts, e.g. flap valves - A61M 2207/00: Methods of manufacture, assembly or production - A61M 2210/1082: Kidney - A61M 2210/12: Blood circulatory system - A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C) - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - 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 Apparatus and methods are described including manufacturing an impeller by coupling a material to a helical elongate element, such that the helical elongate element with the material coupled thereto defines a blade of the impeller. A portion of a structure that includes the helical elongate element is dipped into the material while the material is in a liquid state. The material is dried, while the material is being supported by the at least one helical elongate element. During the drying of material, the structure is rotated about its longitudinal axis, such as to facilitate the formation of a film of the material having a substantially uniform thickness within the impeller blade. Other applications are also described. ## Claims ### Claim 1 A method, comprising: manufacturing an impeller by coupling a material to a structure that defines at least one helical elongate element, such that the at least one helical elongate element with the material coupled thereto defines a blade of the impeller, the coupling being performed by: dipping at least a portion of the structure into the material while the material is in a liquid state, drying the material, while the material is being supported by the at least one helical elongate element, and during the drying of material, rotating the structure about its longitudinal axis, such as to facilitate the formation of a film of the material having a substantially uniform thickness within the impeller blade. ### Claim 2 (depends on 1) The method according to claim 1, wherein the structure defines three helical elongate elements, and coupling the material to the at least one helical elongate element, comprises coupling the material to the three helical elongate elements, such that each of the elongate elements with the material coupled thereto defines a respective blade of the impeller. ### Claim 3 (depends on 1) The method according to claim 1, wherein the structure defines two helical elongate elements, and coupling the material to the at least one helical elongate element, comprises coupling the material to the two helical elongate elements, such that each of the elongate elements with the material coupled thereto defines a respective blade of the impeller. ### Claim 4 (depends on 1) The method according to claim 1, further comprising forming the structure that defines the at least one helical elongate element by: cutting a tube such that the cut tube defines an initial structure having first and second end portions at proximal and distal ends of the initial structure, the end portions being connected to one another by at least one elongate element; and causing the at least one elongate element to radially expand and form at least one helical elongate element, at least partially by axially compressing the initial structure. ### Claim 5 (depends on 4) The method according to claim 4, wherein causing the at least one elongate element to radially expand and form at least one helical elongate element, further comprises twisting the initial structure. ### Claim 6 (depends on 1) The method according to claim 1, wherein coupling the material to the at least one helical elongate element comprises coupling the material to the at least one helical elongate element such that the material defines a hollow central lumen therethrough, the hollow central lumen facilitating the insertion of an axial support member through the hollow central lumen. ### Claim 7 (depends on 6) The method according to claim 6, further comprising inserting the axial support member through the hollow central lumen. ### Claim 8 A method, comprising: manufacturing an impeller by coupling a material to a structure that defines three or more helical elongate elements, such that each of the three or more helical elongate elements with the material coupled thereto defines a respective blade of the impeller, the coupling being performed by: dipping at least a portion of the structure into the material while the material is in a liquid state, drying the material, while the material is being supported by the three or more helical elongate elements, such that the material forms a film of substantially uniform thickness within each of the impeller blades. ### Claim 9 (depends on 8) The method according to claim 8, wherein coupling the material to the three or more helical elongate elements comprises, during the drying of material, rotating the structure about its longitudinal axis, such as to facilitate the formation of the films of the material having the substantially uniform thickness. ### Claim 10 (depends on 8) The method according to claim 8, further comprising forming the structure that defines the three or more helical elongate elements, by: cutting a tube such that the cut tube defines an initial structure having first and second end portions at proximal and distal ends of the initial structure, the end portions being connected to one another by three or more elongate elements; and causing the three or more elongate elements to radially expand and form three or more helical elongate elements, at least partially by axially compressing the initial structure. ### Claim 11 (depends on 10) The method according to claim 10, wherein causing the three or more elongate elements to radially expand and form three or more helical elongate elements, further comprises twisting the initial structure. ### Claim 12 (depends on 8) The method according to claim 8, wherein coupling the material to the three or more helical elongate elements comprises coupling the material to the three or more helical elongate elements such that the material defines a hollow central lumen therethrough, the hollow central lumen facilitating the insertion of an axial support member through the hollow central lumen. ### Claim 13 (depends on 12) The method according to claim 12, further comprising inserting the axial support member through the hollow central lumen.