IP Library › Granted Patent US 12,313,113
Granted Patent B2
US 12,313,113 · App. 17/011,469 · Granted May 27, 2025

Catheter pump arrangement and flexible shaft arrangement having a core

Inventors: Daniel Roehn (Berlin, DE); Reiner Liebing (Potsdam, DE)
Assignee: ECP ENTWICKLUNGSGESELLSCHAFT MBH
F16C1/02A61M60/135A61M60/216A61M60/408A61M60/414A61M60/857F16C1/26A61M60/148F16C1/00
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Quick Facts
Patent No.
US 12,313,113
App. No.
17/011,469
Granted
May 27, 2025
Kind
B2
Abstract

A flexible shaft arrangement is described herein having a flexible hollow shaft ( 1, 2 ) which has an end at the drive side and an end at the output side, wherein the hollow shaft is reinforced sectionally between these ends by a core ( 3, 4 ) extending in its interior. Stiffer and more flexible sections can hereby be selectively positioned within the shaft arrangement.

Claims (20)

1. A flexible drive shaft arrangement comprising:

a drive shaft having a proximal end and a distal end, the drive shaft formed with a hollow lumen,

wherein the drive shaft comprises:

a first portion having a first bending stiffness,

a second portion having a second bending stiffness,

a third portion having a third bending stiffness, and

a fourth portion having a fourth bending stiffness,

wherein the second portion is disposed between the first portion and the third portion and the third portion is disposed between the second portion and the fourth portion, and

wherein the first bending stiffness and the third bending stiffness are each greater than the second bending stiffness and the fourth bending stiffness such that, for a given bending strain, the first portion and the third portion of the drive shaft have a greater bending radius than the second portion and the fourth portion of the drive shaft.

2. The flexible drive shaft arrangement of claim 1 , further comprising a first core disposed within the hollow lumen along the first portion of the drive shaft and a second core disposed within the hollow lumen along the third portion of the drive shaft, wherein, along the second portion and the fourth portion of the drive shaft, the hollow lumen does not include a core.

3. The flexible drive shaft arrangement of claim 2 , wherein the first core reinforces the first portion of the drive shaft such that the first portion has the first bending stiffness, and the second core reinforces the third portion of the drive shaft such that the third portion has the third bending stiffness.

4. The flexible drive shaft arrangement of claim 2 , wherein the first core and the second core are configured to rotate with the drive shaft.

5. The flexible drive shaft arrangement of claim 2 , wherein the first core and the second core are fastened within the hollow lumen.

6. The flexible drive shaft arrangement of claim 5 , wherein the first core and the second core are welded or soldered to the interior of the hollow lumen.

7. The flexible drive shaft arrangement of claim 2 , wherein the first core and the second core comprise a solid body or a stranded body.

8. The flexible drive shaft arrangement of claim 7 , wherein each of the first core and the second core comprises a solid body, the solid body comprises a metal body or a plastic body.

9. The flexible drive shaft arrangement of claim 7 , wherein each of the first core and the second core comprises a stranded body, the stranded body comprises a plurality of strand elements.

10. The flexible drive shaft arrangement of claim 9 , wherein the strand elements are formed by wires.

11. The flexible drive shaft arrangement of claim 1 , wherein the drive shaft comprises at least one wound helical spring.

12. The flexible drive shaft arrangement of claim 1 , wherein the drive shaft has a constant diameter from the proximal end to the distal end.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 3, 2020
From: ROEHN, DANIEL; LIEBING, REINER
To: ECP ENTWICKLUNGSGESELLSCHAFT MBH
Reel/Frame 053687/0808 →
Priority Claims (1)
EP 09075475 · Oct 23, 2009 · regional
Continuity (4)
Continuation 15429312 · Feb 10, 2017
Continuation 13261256
Provisional Application 61254339 · Oct 23, 2009
Related Publication 20210052795A1 · Feb 25, 2021
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