# US 10,765,789 B2 · Impeller 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 10,765,789 B2 - Document ID: US10765789B2 - Status: Granted - Kind: B2 - Application number: 16/026,995 - Filed: 2018-07-03 - Published: 2018-11-01 - Granted: 2020-09-08 - Earliest claimed: 2012-05-14 - Assignees: Tc1 LLC - Applicants: Tc1 LLC - Inventors: Zijing Zeng; Phyllis Yuen; Michael R. Butler - Web page: https://patentgrep.com/patent/US10765789B2 ## CPC - F04D 29/183: {Semi axial flow rotors} - 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 60/174: discharging the blood to the ventricle or arterial system via a cannula internal to the ventricle or arterial system - A61M 60/216: including a rotating member acting on the blood, e.g. impeller - A61M 60/411: generated by an electromotor - A61M 60/508: Electronic control means, e.g. for feedback regulation - A61M 60/546: of blood flow, e.g. by adapting rotor speed - A61M 60/806: Vanes or blades - A61M 60/808: specially adapted for deformable impellers, e.g. expandable impellers - A61M 60/81: Pump housings - A61M 60/857: Implantable blood tubes - A61M 60/414: transmitted by a rotating cable, e.g. for blood pumps mounted on a catheter - A61M 2205/3334: Measuring or controlling the flow rate - F04C 2270/0421: Controlled or regulated - F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02) - 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)} - F04C: ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS (engines F03C); ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS ## Abstract An impeller for a pump is disclosed herein. The impeller can include a hub having a fixed end and a free end. The impeller can also have a plurality of blades supported by the hub. Each blade can have a fixed end coupled to the hub and a free end. The impeller can have a stored configuration and a deployed configuration, the blades in the deployed configuration extending away from the hub, and the blades in the stored configuration being compressed against the hub. ## Claims ### Claim 1 An impeller for a catheter pump, the impeller comprising: a hub having a proximal end portion and a distal end portion; a first row of blades extending from the proximal portion of the hub, the first row of blades comprising a first plurality of circumferentially-spaced blades, wherein each blade of the first row of blades has a blade first proximal end and a blade first distal end, and wherein the hub comprises a first diameter at the blade first distal end and a second diameter at the blade first proximal end that is larger than the first diameter; a second row of blades extending from the distal portion of the hub, the second row of blades comprising a second plurality of circumferentially-spaced blades, wherein the first plurality of blades is circumferentially offset with respect to the second plurality of blades about a surface of the hub. ### Claim 2 (depends on 1) The impeller of claim 1, wherein the first row is positioned at the proximal end portion and the second row is positioned at the distal end portion. ### Claim 3 (depends on 1) The impeller of claim 1, wherein the first row of blades and the second row of blades each comprise at least two blades. ### Claim 4 (depends on 1) The impeller of claim 1, wherein the first row of blades and the second row of blades each comprise at least three blades. ### Claim 5 (depends on 1) The impeller of claim 1, wherein the first row of blades and the second row of blades each comprise an equal number of blades. ### Claim 6 (depends on 1) The impeller of claim 1, wherein each blade of the second row of blades has a second proximal end and second distal end, wherein a circumferential gap defined along the hub between the first distal end and the second proximal end. ### Claim 7 (depends on 6) The impeller of claim 6, wherein an axial gap is defined between the first distal end and the second proximal end along the hub. ### Claim 8 (depends on 6) The impeller of claim 6, wherein the first distal end and the second proximal end are axially aligned along the hub. ### Claim 9 (depends on 1) The impeller of claim 1, wherein each blade of the first row of blades and the second row of blades wraps helically around the hub. ### Claim 10 A catheter pump comprising: a catheter; and an impeller mounted at an end of the catheter, the impeller comprising: a hub having a proximal end portion and a distal end portion; and a first row of blades extending from the proximal portion of the hub, the first row of blades comprising a first plurality of circumferentially-spaced blades, wherein each blade of the first row of blades has a blade first proximal end and a blade first distal end, and wherein the hub comprises a first diameter at the blade first distal end and a second diameter at the blade first proximal end that is larger than the first diameter; a second row of blades extending from the distal portion of the hub, the second row of blades comprising a second plurality of circumferentially-spaced blades, wherein the first plurality of blades is circumferentially offset with respect to the second plurality of blades about a surface of the hub. ### Claim 11 (depends on 10) The catheter pump of claim 10, wherein the first row is positioned at the proximal end portion and the second row is positioned at the distal end portion. ### Claim 12 (depends on 10) The catheter pump of claim 10, wherein the first row of blades and the second row of blades each comprise at least two blades. ### Claim 13 (depends on 10) The catheter pump of claim 10, wherein the first row of blades and the second row of blades each comprise at least three blades. ### Claim 14 (depends on 10) The catheter pump of claim 10, wherein the first row of blades and the second row of blades each comprise an equal number of blades. ### Claim 15 (depends on 10) The catheter pump of claim 10, wherein each blade of the second row of blades has a second proximal end and second distal end, wherein a circumferential gap defined along the hub between the first distal end and the second proximal end. ### Claim 16 (depends on 15) The catheter pump of claim 15, wherein an axial gap is defined between the first distal end and the second proximal end along the hub. ### Claim 17 (depends on 15) The catheter pump of claim 15, wherein the first distal end and the second proximal end are axially aligned along the hub. ### Claim 18 (depends on 10) The catheter pump of claim 10, wherein each blade of the first row of blades and the second row of blades wraps helically around the hub. ### Claim 19 A method of storing an impeller within a sheath for a catheter pump, the method comprising: providing a hub having a proximal end portion and a distal end portion, the hub supporting at least a first row of blades and a second row of blades, wherein each of the first row of blades and the second row of blades comprises a plurality of blades, wherein the blades of the first row are circumferentially offset with respect to the blades of the second row about a surface of the hub, wherein each blade of the first row of blades has a blade first proximal end and a blade first distal end, and wherein the hub comprises a first diameter at the blade first distal end and a second diameter at the blade first proximal end that is larger than the first diameter; inserting the hub into the sheath; and collapsing the first row of blades and the second row of blades into a stored configuration such that the plurality of blades do not overlap when in a stored configuration.