Fluid pump changeable in diameter, in particular for medical application

Patent metadata

Field	Value
Publication number	US-9512839-B2
Application number	US-201414576396-A
Country	US
Kind code	B2
Filing date	Dec 19, 2014
Priority date	May 5, 2009
Publication date	Dec 6, 2016
Grant date	Dec 6, 2016

Abstract

A fluid pump device changeable in diameter is provided. The device has a pump housing which is changeable in diameter and with a rotor which is changeable in diameter. The device has at least one delivery element for fluid, as well as a drive shaft on which the rotor is rotatably mounted. A bearing arrangement is arranged on the drive shaft or its extension, at the distal end of the drive shaft behind the rotor seen from the proximal end of the drive shaft. The bearing arrangement has struts, which elastically brace between a hub of the bearing arrangement and the pump housing.

First claim

I claim:

1. A fluid pump device changeable in diameter, with a pump housing which is changeable in diameter, with a rotor which is changeable in diameter and having at least one delivery element for the fluid, as well as a drive shaft on which the rotor is rotatably mounted, wherein a bearing arrangement is arranged on the drive shaft or its extension, at the distal end of the drive shaft behind the rotor seen from the proximal end of the drive shaft, wherein the bearing arrangement has struts, which elastically brace between a hub of the bearing arrangement and the pump housing.

2. The fluid pump device according to claim 1 , wherein the drive shaft between the distal end and the proximal end at least in sections runs in a sleeve or parallel to a sleeve.

3. The fluid pump device according to claim 2 , wherein the drive shaft is movable in a longitudinal direction and at whose distal end the fluid pump and at whose proximal end an actuation device is arranged, wherein the pump housing and the rotor are displaceable relative to one another by way of actuating the actuation means, wherein the pump housing and the rotor are displaceable to one another in the longitudinal direction of the actuation means to such an extent, that they may be arranged behind one another in the longitudinal direction or with a mutual overlapping in the longitudinal direction, which is smaller than the overlapping during the operation of the fluid pump.

4. The fluid pump device according to claim 3 , wherein the bearing arrangement on the actuation means or its extension is displaceable in the longitudinal direction of these.

5. The fluid pump device according to according to claim 4 , wherein the bearing arrangement is displaceable relative to the rotor in the longitudinal direction of the drive shaft.

6. The fluid pump device according to claim 5 , wherein the drive shaft or its extension carries an abutment body, which on pulling back the actuation means in the proximal direction, carries along the bearing arrangement.

7. The fluid pump device according to claim 6 , wherein the struts are fastened on the hub of the bearing arrangement in an elastically pivotable manner.

8. The fluid pump device according to claim 7 , wherein between two and eight struts are provided.

9. The fluid pump device according to claim 8 , wherein the struts in the braced condition form an inflow cage at the distal end of the fluid pump.

10. The fluid pump device according to claim 9 , wherein the actuation means is displaceable with respect to the sleeve in the longitudinal direction and the actuation device.

11. The fluid pump device according to claim 10 , wherein the drive-side end of the drive shaft is connected to a drive body which is arranged in a sealed housing and which is magnetically rotationally drivable from outside the housing, and/or characterized in that the drive body is displaceable in the longitudinal direction of the drive shaft and on the cover-side is driven by a changing magnetic field, and/or characterized in that the drive shaft is firmly connected to a catch body which for its part is guided in the drive body in a rotationally fixed manner and in a manner displaceable in the longitudinal direction of the drive shaft, and/or wherein the struts of the bearing arrangement are arranged in a star-like manner.

12. The fluid pump device according to claim 1 , wherein the bearing arrangement is configured in a manner that on introducing the fluid pump device through a blood vessel into a human body, the struts firstly bear snugly on the hub body, as long as the bearing arrangement is still located within the vessel, and is then elastically expandable.

13. The fluid pump device according to claim 1 , wherein the struts are pivotably movably fastened on the hub either by way of a joint or by way of their flexibility.

Assignees

• Ecp Entw Mbh

Inventors

• Liebing Reiner

Classifications

• F04D29/046

  Bearings · CPC title

• Y10S415/90

  Rotary blood pump · CPC title

• F04C14/22 Primary

  by changing the eccentricity between cooperating members · CPC title

• F04C2/02

  of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents · CPC title

• F04D29/242

  Geometry, shape · CPC title