Granted Patent B2

US 12,612,906 · App. 18/923,024 · Granted Apr 28, 2026

Inventors: Philipp Löffler (Freising, DE); Matthias Zeppenfeld (Munich, DE)

Assignee: LivaNova Deutschland GmbH

F04B43/1276A61M1/3666A61M5/14232A61M60/109A61M60/279A61M60/441

Abstract

Claims (76)

1 . A roller pump, comprising:

a roller pump rotor comprising a first roller arm having a first roller rotatably coupled thereto and a second roller arm having a second roller rotatably coupled thereto;

a raceway disposed around the roller pump rotor and configured to receive a flexible tubing;

a pump motor configured to rotate the roller pump rotor relative to the raceway; and

an electronic actuator disposed on the roller pump rotor, wherein the electronic actuator is configured to change a radial position of the first roller relative to a central axis of the roller pump rotor and a radial position of the second roller relative to the central axis of the roller pump rotor;

wherein the first roller arm is pivotably coupled to the roller pump rotor at a first location and the second roller arm is pivotably coupled to the roller pump rotor at a second location spaced part from the first location;

wherein the electronic actuator comprises a gear disposed coaxial with the central axis of the roller pump rotor and the gear is configured to engage the first roller arm and the second roller arm to change the radial position of the first roller and the second roller relative to the central axis of the roller pump rotor.

2 . The roller pump of claim 1 , wherein the radial position of the first roller and the radial position of the second roller corresponds to a degree of occlusion of the flexible tubing.

3 . The roller pump of claim 2 , wherein as the radial position of the first roller and the radial position of the second roller moves away from the central axis of the roller pump rotor, the degree of occlusion of the flexible tubing increases.

4 . The roller pump of claim 2 , wherein as the radial position of the first roller and the radial position of the second roller moves toward the central axis of the roller pump rotor, the degree of occlusion of the flexible tubing decreases.

5 . The roller pump of claim 1 , wherein the electronic actuator functions independently of the pump motor to change the radial position of the first roller and the radial position of the second roller relative to the central axis of the roller pump rotor.

6 . The roller pump of claim 5 , wherein the electronic actuator is configured to change the radial position of the first roller and the radial position of the second roller relative to the central axis of the roller pump rotor while the pump motor is rotating the roller pump rotor relative to the raceway.

7 . The roller pump of claim 1 , wherein a portion of the first roller arm overlaps a portion of the second roller arm.

8 . The roller pump of claim 1 , wherein the raceway comprises a force sensor configured to sense force exerted against the flexible tubing by the first roller and the second roller.

9 . The roller pump of claim 1 , wherein the electronic actuator is configured to automatically change the radial position of the first roller and the radial position of the second roller relative to the roller pump rotor in order to maintain a desired flow rate through the flexible tubing.

10 . The roller pump of claim 1 , wherein the electronic actuator is configured to automatically change the radial position of the first roller and the radial position of the second roller relative to the roller pump rotor in response to pressure or flow rate of fluid within the flexible tubing.

11 . An extracorporeal perfusion system, comprising:

a fluid reservoir;

an oxygenator;

flexible tubing fluidly coupling the fluid reservoir to the oxygenator; and

the roller pump of claim 1 , wherein the flexible tubing is disposed within the raceway and the first roller and the second roller are engaged with the flexible tubing;

wherein the pump motor is configured to rotate the roller pump rotor relative to the raceway to cause fluid to flow within the flexible tubing from the fluid reservoir to the oxygenator.

12 . A roller pump, comprising:

a roller pump rotor comprising a first roller arm having a first roller rotatably coupled thereto and a second roller arm having a second roller rotatably coupled thereto;

a raceway disposed around the roller pump rotor and configured to receive a flexible tubing;

a pump motor configured to rotate the roller pump rotor relative to the raceway; and

an electronic actuator disposed on the roller pump rotor, wherein the electronic actuator is configured to change a radial position of the first roller relative to a central axis of the roller pump rotor and a radial position of the second roller relative to the central axis of the roller pump rotor; and

a threaded mechanism configured to engage the first roller arm and the second roller arm such that actuation of the threaded mechanism by the electronic actuator changes the radial position of the first roller and the radial position of the second roller relative to the central axis of the roller pump rotor;

wherein the threaded mechanism comprises a threaded rod and a scissors assembly.

13 . An extracorporeal perfusion system, comprising:

a fluid reservoir;

an oxygenator;

flexible tubing fluidly coupling the fluid reservoir to the oxygenator; and

the roller pump of claim 12 , wherein the flexible tubing is disposed within the raceway and the first roller and the second roller are engaged with the flexible tubing;

wherein the pump motor is configured to rotate the roller pump rotor relative to the raceway to cause fluid to flow within the flexible tubing from the fluid reservoir to the oxygenator.

14 . A roller pump, comprising:

a roller pump rotor comprising a first roller arm having a first roller rotatably coupled thereto and a second roller arm having a second roller rotatably coupled thereto;

a raceway disposed around the roller pump rotor and configured to receive a flexible tubing;

a pump motor configured to rotate the roller pump rotor relative to the raceway; and

an electronic actuator disposed on the roller pump rotor, wherein the electronic actuator is configured to change a radial position of the first roller relative to a central axis of the roller pump rotor and a radial position of the second roller relative to the central axis of the roller pump rotor; and

a threaded mechanism configured to engage the first roller arm and the second roller arm such that actuation of the threaded mechanism by the electronic actuator changes the radial position of the first roller and the second roller relative to the central axis of the roller pump rotor;

wherein the threaded mechanism comprises:

a flattened disk having a center and a peripheral edge; and

a spiral thread extending between the center and the peripheral edge;

wherein the first roller arm comprises threads configured to engage with the spiral thread of the threaded mechanism and the second roller arm comprises threads configured to engage with the spiral thread of the threaded mechanism.

15 . An extracorporeal perfusion system, comprising:

a fluid reservoir;

an oxygenator;

flexible tubing fluidly coupling the fluid reservoir to the oxygenator; and

the roller pump of claim 14 , wherein the flexible tubing is disposed within the raceway and the first roller and the second roller are engaged with the flexible tubing;

wherein the pump motor is configured to rotate the roller pump rotor relative to the raceway to cause fluid to flow within the flexible tubing from the fluid reservoir to the oxygenator.

16 . A roller pump, comprising:

a roller pump rotor comprising a first roller arm having a first roller rotatably coupled thereto and a second roller arm having a second roller rotatably coupled thereto;

a raceway disposed around the roller pump rotor and configured to receive a flexible tubing;

a pump motor configured to rotate the roller pump rotor relative to the raceway; and

an electronic actuator disposed on the roller pump rotor, wherein the electronic actuator is configured to change a radial position of the first roller relative to a central axis of the roller pump rotor and a radial position of the second roller relative to the central axis of the roller pump rotor;

wherein the electronic actuator comprises a rack and pinion system configured to change the radial position of the first roller and the radial position of the second roller relative to the central axis of the roller pump rotor.

17 . An extracorporeal perfusion system, comprising:

a fluid reservoir;

an oxygenator;

flexible tubing fluidly coupling the fluid reservoir to the oxygenator; and

the roller pump of claim 16 , wherein the flexible tubing is disposed within the raceway and the first roller and the second roller are engaged with the flexible tubing;

wherein the pump motor is configured to rotate the roller pump rotor relative to the raceway to cause fluid to flow within the flexible tubing from the fluid reservoir to the oxygenator.

18 . A roller pump, comprising:

a roller pump rotor comprising a first roller arm having a first roller rotatably coupled thereto and a second roller arm having a second roller rotatably coupled thereto;

a raceway disposed around the roller pump rotor and configured to receive a flexible tubing;

a pump motor configured to rotate the roller pump rotor relative to the raceway; and

an electronic actuator disposed on the roller pump rotor, wherein the electronic actuator is configured to change a radial position of the first roller relative to a central axis of the roller pump rotor and a radial position of the second roller relative to the central axis of the roller pump rotor;

wherein the electronic actuator is couplable to the pump motor such that the pump motor is capable of rotating the roller pump rotor and changing the radial position of the first roller and the radial position of the second roller relative to the roller pump rotor;

wherein the electronic actuator comprises a clutch mechanism configured to selectively couple the pump motor with the first roller arm and the second roller arm.

19 . An extracorporeal perfusion system, comprising:

a fluid reservoir;

an oxygenator;

flexible tubing fluidly coupling the fluid reservoir to the oxygenator; and

the roller pump of claim 18 , wherein the flexible tubing is disposed within the raceway and the first roller and the second roller are engaged with the flexible tubing;

wherein the pump motor is configured to rotate the roller pump rotor relative to the raceway to cause fluid to flow within the flexible tubing from the fluid reservoir to the oxygenator.

Assignments (1)

Continuity (1)

References Cited (15)