# US 10,119,550 B2 · Pump housing with an interior for accommodating a pump rotor

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- Number: US 10,119,550 B2
- Document ID: US10119550B2
- Status: Granted
- Kind: B2
- Application number: 13/261,899
- Filed: 2012-12-21
- Published: 2014-09-11
- Granted: 2018-11-06
- Earliest claimed: 2011-12-22
- Assignees: Ecp Entwicklungsgesellschaft Mbh
- Applicants: Ecp Entwicklungsgesellschaft Mbh
- Inventors: Lars Bredenbreuker; Joerg Schumacher
- Web page: https://patentgrep.com/patent/US10119550B2

## CPC

- F04D 29/18: Rotors (specially for elastic fluids F04D29/26)
- A61M 60/13: by means of a catheter allowing explantation, e.g. catheter pumps temporarily introduced via the vascular system
- A61M 60/205: Non-positive displacement blood pumps
- A61M 60/237: the blood flow through the rotating member having mainly axial components, e.g. axial flow pumps
- A61M 60/81: Pump housings
- A61M 60/833: Occluders for preventing backflow
- A61M 60/896: having flexible or resilient parts, e.g. flap valves
- F04D 15/0005: {by using valves}
- F04D 29/026: {especially adapted for liquid pumps}
- F04D 29/181: {Axial flow rotors (F04D29/185 take precedence)}
- F04D 29/247: {elastic or self-adjusting}
- F04D 29/528: {especially adapted for liquid pumps}
- A61M 60/135: inside a blood vessel, e.g. using grafting
- A61M 60/148: in line with a blood vessel using resection or like techniques, e.g. permanent endovascular heart assist devices
- A61M 60/414: transmitted by a rotating cable, e.g. for blood pumps mounted on a catheter
- A61M 2205/04: implanted
- A61M 2210/125: Heart
- F05D 2300/174: Titanium alloys, e.g. TiAl
- F05D 2300/505: Shape memory behaviour
- F05D 2300/603: Composites; e.g. fibre-reinforced
- F05D 2300/6034: Orientation of fibres, weaving, ply angle
- F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02)
- A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)}
- F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS

## Abstract

In a pump housing having an interior for accommodating a pump rotor, which may be transferred from a radially compressed state into a radially expanded state, and comprises a housing skin revolving in circumferential direction, as well as at least one reinforcement element, a stretch-resistant element revolving in circumferential direction is provided, which is stretched less than 5% in the expanded state as opposed to the force-free state in circumferential direction, and which limits any further expansion of the pump housing in radial direction.

## Claims

### Claim 1

A pump housing having an interior for accommodating a compressible and an expandable pump rotor, the housing comprising;
a stretch-resistant, radially compressible and expandable housing skin revolving in a circumferential direction, the housing skin formed of a stretch-resistant material which is configured to stretch less than 5% when the housing skin is fully expanded compared to when the housing skin is in an unstressed state, wherein the housing skin limits expansion of the housing;
at least one reinforcement, the at least one reinforcement being configured to expand in the circumferential direction with expansion of the housing skin; and
a ring revolving in the circumferential direction of the housing and surrounding the at least one reinforcement at least in sections.

### Claim 2 (depends on 1)

The pump housing according to claim 1, further comprising a vault or an arch formed by the at least one reinforcement when the housing is fully expanded, wherein the vault or arch resists forces directed radially toward the interior of at least 1 N without collapsing.

### Claim 3 (depends on 1)

The pump housing according to claim 1, wherein the housing skin is formed by a flexible film.

### Claim 4 (depends on 1)

The pump housing according to claim 1, wherein the ring is disposed on a radially external side of the housing skin.

### Claim 5 (depends on 1)

The pump housing according to claim 1, wherein the ring is disposed on a radially internal side of the housing skin.

### Claim 6 (depends on 1)

The pump housing according to claim 1, wherein the at least one reinforcement forms a surface-like, two-dimensional grate, which is bent into the form of a tube.

### Claim 7 (depends on 1)

The pump housing according to claim 1, further comprising multiple reinforcements that are (i) pivotable against each other, (ii) form the shape of a tube in a first pivoting state, and (iii) are compressed radially as opposed to the tube shape in a second pivoting state.

### Claim 8 (depends on 1)

The pump housing according to claim 1, wherein the at least one reinforcement is comprised of a super-elastic material selected from the group consisting of a super-elastic alloy and nitinol.

### Claim 9 (depends on 1)

The pump housing according to claim 1, further comprising a valve within the pump housing at an axial distance to the pump rotor for changing a flow resistance for a fluid flow passing through the interior.

### Claim 10 (depends on 1)

The pump housing according to claim 1, wherein the pump housing is for a blood pump.

### Claim 11

A pump housing having an interior for accommodating a compressible and an expandable pump rotor, the housing comprising;
a stretch-resistant, radially compressible and expandable housing skin revolving in a circumferential direction, the housing skin formed of a stretch-resistant material which is configured to stretch less than 5% when the housing skin is fully expanded compared to when the housing skin is in an unstressed state, wherein the housing skin limits expansion of the housing; and
at least one reinforcement, the at least one reinforcement being configured to expand in the circumferential direction with expansion of the housing skin;
wherein the stretch-resistant material comprises stretch-resistant fibers extending in the circumferential direction.

### Claim 12 (depends on 11)

The pump housing according to claim 11, wherein the at least one reinforcement exerts elastic forces greater than 1 N radially when the housing is fully expanded.

### Claim 13 (depends on 11)

The pump housing according to claim 11, wherein the housing skin is formed by a flexible film.

### Claim 14 (depends on 11)

The pump housing according to claim 11, wherein the stretch-resistant fibers are selected from the group consisting of glass fibers, carbon fibers, aramide fibers, and nylon fibers.

### Claim 15 (depends on 11)

The pump housing according to claim 11, wherein the at least one reinforcement is comprised of a super-elastic material selected from the group consisting of a super-elastic alloy and nitinol.

### Claim 16 (depends on 11)

The pump housing according to claim 11, wherein the housing skin at least sectionally surrounds the at least one reinforcement.

### Claim 17 (depends on 11)

The pump housing according to claim 11, further comprising an interior wall limiting the housing interior, the interior wall tapering in an axial direction.

### Claim 18 (depends on 17)

The pump housing according to claim 17, wherein the interior wall tapers in a conical manner.

### Claim 19 (depends on 11)

The pump housing according to claim 11, wherein the pump housing is for a blood pump.

### Claim 20 (depends on 19)

The pump housing according to claim 19, further comprising a catheter attached to the pump housing.