Compressible rotor for a fluid pump

Patent metadata

Field	Value
Publication number	US-2016348688-A1
Application number	US-201615236757-A
Country	US
Kind code	A1
Filing date	Aug 15, 2016
Priority date	Sep 22, 2009
Publication date	Dec 1, 2016
Grant date	—

Abstract

The invention relates to a rotor ( 2, 15 ) for a fluid pump ( 1 ), in particular for use in the medical sphere, the rotor being compressible for bringing to the place of use and thereafter being expandable. The compressibility is assisted by the provision of cavities ( 27, 28, 29 ), in particular also production of the rotor at least partially from a foam.

First claim

1 - 16 . (canceled)

17 . A fluid pump comprising:
a compressible rotor having at least one blade, and at least one anisotropic cavity having a greater extension in a first direction than in directions essentially perpendicular to the first direction.

18 . The fluid pump of claim 17 , wherein the at least one anisotropic cavity is oriented with a longitudinal axis perpendicular to an outer surface of the at least one blade.

19 . The fluid pump of claim 17 , wherein the at least one anisotropic cavity is provided in the at least one blade.

20 . The fluid pump of claim 17 , wherein the at least one anisotropic cavity is configured, in cross-section, to be round or polygonal, in particular octagonal, hexagonal, triangular or square.

21 . The fluid pump of claim 20 , wherein the at least one anisotropic cavity has a strand shape.

22 . The fluid pump of claim 17 , wherein the at least one anisotropic cavity is orientated with the direction of its greatest stability in the direction of the pressure forces which arise within the rotor during operation.

23 . The fluid pump of claim 17 , wherein the at least one anisotropic cavity's greatest stability is its longitudinal axis.

24 . The fluid pump of claim 17 , wherein the at least one blade is configured to be self-supporting and hub-free.

25 . The fluid pump of claim 17 , wherein the at least one blade is provided in a hub body.

26 . The fluid pump of claim 17 , further comprising a compressible housing surrounding the rotor.

27 . The fluid pump of claim 26 , wherein the housing consists at least partially of a material comprising cavities.

28 . The fluid pump of claim 27 , wherein the material comprising cavities is foam.

29 . The fluid pump of claim 28 , wherein the housing is sized for percutaneous insertion in a compressed state.

30 . The fluid pump of claim 29 , wherein the rotor includes at least one deformable cavity, the rotor being constructed such that it can be compressed and decompressed by a change in density of the material.

31 . The fluid pump of claim 30 , wherein the rotor is compressed by the material being converted by compression from a first, lower density or from a first, lower specific weight to a second, higher density or a higher specific weight.

32 . The fluid pump of claim 31 , wherein the at least one deformable cavity is closed and filled with a gas.

33 . The fluid pump of claim 32 , wherein the gas is air or nitrogen, or a noble gas or another bioinert gas which can be compressed easily in volume by pressure.

34 . The fluid pump of claim 33 , wherein the at least one deformable cavity expands in the absence of an external pressure force due to an elasticity of the gas.

35 . The fluid pump of claim 30 , further comprising a gas lines to the rotor, wherein the gas line ends in the at least one deformable cavity.

36 . The fluid pump of claim 30 , wherein the average change in density of the rotor material between compressed and decompressed state is at least 10%.

37 . The fluid pump of claim 30 , wherein the change in density of the rotor material is not uniform at all places.

Assignees

• Ecp Entw Mbh

Inventors

• Schumacher Joerg
• Scheckel Mario
• Schlicht Henning

Classifications

• F04D3/00

  Axial-flow pumps (priming or boosting F04D9/00) · CPC title

• F05B2240/311

  flexible or elastic · CPC title

• F04D29/24

  Vanes · CPC title

• F04D29/181 Primary

  Axial flow rotors (F04D29/185 take precedence) · CPC title

• F05B2280/6012

  Foam · CPC title