Pump or rotary cutter for operation in a fluid

Patent metadata

Field	Value
Publication number	US-11986205-B2
Application number	US-202117308094-A
Country	US
Kind code	B2
Filing date	May 5, 2021
Priority date	Mar 5, 2010
Publication date	May 21, 2024
Grant date	May 21, 2024

Abstract

The invention relates to a fluid pump or rotary cutter having at least one first element ( 9″″, 10 ′″) which can be brought from a transport state into an operating state by changing at least one mechanical property. Such a pump can, for example, be a blood pump for the medical, microinvasive area. The object of achieving a transition between the transport state and the operating state which is as comfortable as possible and in so doing leaving a freedom in the design of the corresponding apparatus, in particular of a pump, which is as large as possible, is achieved using the means of the invention in that the first element at least partly comprises a material ( 24, 25, 26, 27 ) or can be filled with a material or material mixture which passes through a chemical reaction, in particular cross-linking, or a crystallization for transition into the operating state.

First claim

The invention claimed is:

1. A pump for operation in a fluid, the pump comprising:
at least one rotor blade, the at least one rotor blade having a compressed state in which the at least one rotor blade is compressed to a first size and the at least one rotor blade also having an expanded state in which the at least one rotor blade is expanded to a second size, the second size being larger than the first size; wherein the at least one rotor blade comprises at least in part a stiffening portion, wherein in the compressed state the stiffening portion has a first stiffness and in the expanded state the stiffening portion has a second stiffness; and wherein the stiffening portion converts from the first stiffness to the second stiffness when the at least one rotor blade changes between the compressed state and the expanded state.

2. The pump of claim 1 wherein the at least one rotor blade comprises a joint connecting the at least one rotor blade to a hub, wherein the joint is the stiffening portion.

3. The pump of claim 1 wherein the stiffening portion is a hollow space that fills with fluid under pressure.

4. The pump of claim 1 wherein the stiffening portion is a hardenable material.

5. The pump of claim 4 wherein the hardenable material is hardened when the at least one rotor blade transitions from the compressed state to the expanded state.

6. The pump of claim 5 , wherein the hardening is caused by temperature effect, electric and/or magnetic fields, radiation, mechanical effect, ultrasound, or by initializing a crystallization.

7. The pump of claim 6 wherein the hardening is permanent.

8. The pump of claim 6 wherein the stiffening portion is a web.

9. The pump of claim 3 wherein a gas flows through a lumen in a hub connected to the at least one rotor blade comprising the hollow space, wherein the hollow space has a liquid therein that is converted to a foam when the gas is introduced into the hollow space.

10. The pump of claim 1 wherein the stiffening portion of the at least one rotor blade is cross-linkable reinforcing ribs.

Assignees

• Ecp Entw Mbh

Inventors

• Wiessler Petra
• Friedel Sven-René
• Liebing Reiner
• Er Sami
• Schlicht Henning

Classifications

• A61B17/320725 Primary

  with radially expandable cutting or abrading elements (A61B17/32075 takes precedence) · CPC title

• A61B17/320758

  with a rotating cutting instrument, e.g. motor driven (A61B17/320725, A61B17/32075 and A61B17/320783 take precedence; for removing intra-ocular material A61F9/00763; endoscopic rotatable cutting instruments A61B17/32002) · CPC title

• A61M60/178

  drawing blood from a ventricle and returning the blood to the arterial system via a cannula external to the ventricle, e.g. left or right ventricular assist devices · CPC title

• A61M60/216

  including a rotating member acting on the blood, e.g. impeller · CPC title

• A61M60/462

  Electromagnetic force · CPC title