Fluid pump with a rotor

• US 9,404,505 B2
• Filed: 03/04/2015
• Issued: 08/02/2016
• Est. Priority Date: 12/05/2008
• Status: Active Grant

• Current Assignee: ECP Entwicklungsgesellschaft mbH (Johnson & Johnson)
• Original Assignee: ECP Entwicklungsgesellschaft mbH (Johnson & Johnson)
• Inventors: Scheckel, Mario
• Primary Examiner(s): Gedeon, Brian T
• Assistant Examiner(s): Tejani, Ankit D
• Application Number:
  US14/638,587
• Publication Number:
  US 20150211542A1
• Time in Patent Office: 517 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: A61M 60/13 by means of a catheter allowing explantation, e.g. catheter pumps temporarily introduced via the vascular system
• CPC Class Codes: A61M 60/135 inside a blood vessel, e.g. using grafting
• CPC Class Codes: A61M 60/148 in line with a blood vessel using resection or like techniques, e.g. permanent endovascular heart assist devices
• CPC Class Codes: A61M 60/216 including a rotating member acting on the blood, e.g. impeller
• CPC Class Codes: A61M 60/237 the blood flow through the rotating member having mainly axial components, e.g. axial flow pumps
• CPC Class Codes: A61M 60/414 transmitted by a rotating cable, e.g. for blood pumps mounted on a catheter
• CPC Class Codes: A61M 60/422 the force acting on the blood contacting member being electromagnetic, e.g. using canned motor pumps
• CPC Class Codes: A61M 60/808 specially adapted for deformable impellers, e.g. expandable impellers
• CPC Class Codes: B63H 1/14 Propellers pitch changing B63H3/00
• CPC Class Codes: B63H 2001/122 Single or multiple threaded helicoidal screws, or the like, comprising foils extending over a substantial angle; Archimedean screws
• CPC Class Codes: F04D 29/026 especially adapted for liquid pumps
• CPC Class Codes: F04D 29/18 Rotors specially for elastic fluids F04D29/26
• CPC Class Codes: F04D 29/247 elastic or self-adjusting
• CPC Class Codes: F04D 29/605 specially adapted for liquid pumps
• CPC Class Codes: F05D 2230/50 Building or constructing in particular ways
• CPC Class Codes: F05D 2300/501 Elasticity
• CPC Class Codes: F05D 2300/505 Shape memory behaviour
• CPC Class Codes: F05D 2300/518 Ductility
• CPC Class Codes: Y10T 29/49229 Prime mover or fluid pump making
• CPC Class Codes: Y10T 29/49245 Vane type or other rotary, e.g., fan

Abstract

The invention relates to a fluid pump, in particular to a liquid pump having a rotor with at last one rotor blade for conveying the fluid, the rotor being variable with respect to its diameter between a first, compressed state and a second expanded state. In order to produce a simple compressibility and expandability of the rotor of the pump, it is provided according to the invention that at least one rotor blade is deformable between a first state which it assumes in the compressed state of the rotor and a second state which it assumes in the expanded state of the rotor by means of a fluid counterpressure during a rotation of the rotor during pump operation.

Claims

1. A fluid pump, comprising a rotor with at least one rotor blade for conveying fluid, the rotor being variable with respect to its diameter between a compressed state, and an expanded state, wherein the at least one rotor blade deforms as the rotor transitions between the compressed state, and the expanded state, wherein the at least one rotor blade has a leading side and a trailing side with respect to the direction of rotation during conveying pump operation, and wherein the rotor is configured such that when the rotor is rotating during conveying pump operation, the fluid counterpressure is produced counter to the direction of rotation against the leading side of the at least one rotor blade, and wherein the rotor comprises a first material, wherein the first material comprises fibers.

2. The fluid pump of claim 1 wherein the fibers are stretch-resistant.

3. The fluid pump of claim 2 wherein the stretch-resistant fibers are more stretch-resistant than the first material.

4. The fluid pump of claim 2 wherein the stretch-resistant fibers are selected from the group comprising:

high-strength plastic fibers, glass fibers, and carbon fibers.

5. The fluid pump of claim 2 wherein the stretch-resistant fibers are unstretched in the compressed state of the rotor.

6. The fluid pump of claim 2 wherein the stretch-resistant fibers are stretched in the expanded state of the rotor.

7. The fluid pump of claim 1 wherein the leading side is comprised of the first material and the trailing side is comprised of a second material.

8. The fluid pump of claim 7 wherein the first material differs from the second material.

9. The fluid pump of claim 1 wherein the rotor is variable with respect to its diameter between a compressed state, a first expanded state, and a second expanded state.

10. The fluid pump of claim 9, wherein the second expanded state is achieved by means of a fluid counterpressure resulting from conveyance of fluid during rotation of the rotor during conveying pump operation.

11. A fluid pump, comprising a rotor with at least one rotor blade for conveying fluid, the rotor being variable with respect to its diameter between a compressed state, and an expanded state wherein the at least one rotor blade has a leading side and a trailing side, and wherein the leading side is made from a first material and wherein the first material comprises fibers.

12. The fluid pump of claim 11 wherein the fibers are stretch-resistant.

13. The fluid pump of claim 12 wherein the stretch-resistant fibers are more stretch-resistant than the first material.

14. The fluid pump of claim 12 wherein the stretch-resistant fibers are selected from the group comprising:

high-strength plastic fibers, glass fibers, and carbon fibers.

15. The fluid pump of claim 12 wherein the stretch-resistant fibers are unstretched in the compressed state of the rotor.

16. The fluid pump of claim 12 wherein the stretch-resistant fibers are stretched in the expanded state of the rotor.

17. The fluid pump of claim 11 wherein the leading side is comprised of the first material and the trailing side is comprised of a second material.

18. The fluid pump of claim 17 wherein the first material differs from the second material.

19. The fluid pump of claim 11 wherein the rotor is variable with respect to its diameter between a compressed state, a first expanded state, and a second expanded state.

20. The fluid pump of claim 19, wherein the second expanded state is achieved by means of a fluid counterpressure resulting from conveyance of fluid during rotation of the rotor during conveying pump operation.

21. The fluid pump of claim 20 wherein the stretch-resistant fibers are stretched in the second expanded state of the rotor.

22. A fluid pump, comprising a rotor with at least one rotor blade for conveying fluid, the rotor being variable with respect to its diameter between a compressed state, a first expanded state, and a second expanded state, wherein the at least one rotor blade deforms as the rotor transitions between the compressed state, the first expanded state, and the second expanded state, and wherein the second expanded state is achieved by means of a fluid counterpressure resulting from conveyance of fluid during rotation of the rotor during conveying pump operation, wherein the at least one rotor blade has a leading side and a trailing side with respect to the direction of rotation during conveying pump operation, and wherein the rotor is configured such that when the rotor is rotating during conveying pump operation, the fluid counterpressure is produced counter to the direction of rotation against the leading side of the at least one rotor blade and the at least one rotor blade is resultingly deformed so as to widen the diameter of the rotor, and wherein the leading side comprises a first material and the trailing side comprises a second material and wherein the first material differs from the second material.

23. The fluid pump of claim 22, wherein the first material comprises fibers.

24. The fluid pump of claim 23 wherein the fibers are stretch-resistant.

25. The fluid pump of claim 24 wherein the stretch-resistant fibers are more stretch-resistant than the first material.

26. The fluid pump of claim 24 wherein the stretch-resistant fibers are selected from the group comprising:

high-strength plastic fibers, glass fibers, and carbon fibers.

27. The fluid pump of claim 24 wherein the stretch-resistant fibers are unstretched in the compressed state of the rotor.

28. The fluid pump of claim 24 wherein the stretch-resistant fibers are stretched in the second expanded state of the rotor.