# US 12,109,390 B2 · Infusion system having an infusion pump and having a pump module that can be coupled thereto

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- Number: US 12,109,390 B2
- Document ID: US12109390B2
- Status: Granted
- Kind: B2
- Application number: 17/263,254
- Filed: 2019-07-26
- Published: 2021-06-24
- Granted: 2024-10-08
- Earliest claimed: 2018-08-01
- Assignees: Braun Melsungen AG
- Applicants: B. Braun Melsungen AG
- Inventors: Jürgen Fuchs; Jürgen Hartung; Jürgen Steger
- Web page: https://patentgrep.com/patent/US12109390B2

## CPC

- A61M 5/14216: {Reciprocating piston type}
- A61M 5/16804: {Active flow controllers}
- A61M 5/1413: {Modular systems comprising interconnecting elements}
- A61M 5/1452: {pressurised by means of pistons}
- A61M 5/14566: {with a replaceable reservoir for receiving a piston rod of the pump}
- A61M 5/1411: {Drip chambers (A61M5/1689, A61M5/40 take precedence)}
- A61M 5/16809: {by repeated filling and emptying of an intermediate volume}
- A61M 5/16831: {Monitoring, detecting, signalling or eliminating infusion flow anomalies (low-level float-valves causing cut-off A61M5/40; indicating or recording presence, absence or direction of flow in general G01P13/0066)}
- A61M 5/16877: {Passive flow controllers; Devices for setting a flow rate (clamp-type valves A61M39/28)}
- A61M 39/24: Check- or non-return valves
- A61M 2005/14573: {with a replaceable reservoir for quick connection/disconnection with a driving system}
- A61M 2205/106: reciprocating
- A61M 2205/27: preventing use
- A61M 2205/502: User interfaces, e.g. screens or keyboards
- A61M 2205/505: Touch-screens; Virtual keyboard or keypads; Virtual buttons; Soft keys; Mouse touches
- A61M 2205/8206: battery-operated
- A61M 2205/8237: Charging means
- 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)}

## Abstract

An infusion system includes a pump and a replaceable pump module. The pump module can be arranged in a mount of the pump and includes a plunger-barrel unit operatively connectable to a drive mechanism of the pump. The pump module includes a plunger that can be coupled to the drive mechanism by a coupling structure operatively connected to the plunger and a counter-coupling structure for connecting engagement in the coupling structure and operatively connected to the drive mechanism. In a securing position, the infusion system includes a securing member which locks the coupling structure and the counter-coupling structure to each other. In addition or in the alternative, the infusion pump includes a control link operatively connected to the pump module.

## Claims

### Claim 1

An infusion system comprising an infusion pump and a pump module being separate therefrom and provided as a disposable product and thus replaceable which is configured to be arranged in a mount of the infusion pump, the pump module comprising a plunger-barrel unit operatively connectable to a drive mechanism of the infusion pump, the pump module further comprising a barrel and a plunger translationally movable within the barrel, the plunger being adapted to be coupled to the drive mechanism by a coupling structure operatively connected to the plunger and by a counter-coupling structure configured for connecting engagement in the coupling structure and being operatively connected to the drive mechanism, wherein the infusion pump has a control link which is operatively connected or operatively connectable to the pump module so that, when the pump module is arranged in the mount, the control link is positioned by force in a release position in which pumping action of the plunger is enabled, the control link being displaceable from the release position to a blocking position that disengages the counter-coupling structure from the coupling structure and allows decoupling of the plunger of the pump module from the drive mechanism of the infusion pump, and wherein the infusion pump includes a cover member configured to be positioned in a closing position closing the mount for the pump module, wherein the cover member, the mount and the pump module are adapted to each other and designed so that, when the pump module is not arranged in the mount, the cover member cannot be positioned in the closing position closing the mount.

### Claim 2 (depends on 1)

The infusion system according to claim 1, wherein the cover member is operatively connected to the control link in such a way that the control link is positioned by force into the release position when the cover member is provided in the closing position and is positioned by force into the blocking position when the cover member is not provided in the closing position.

### Claim 3 (depends on 1)

The infusion system according to claim 1, wherein the infusion system includes a toggle lever mechanism which is operatively connected to the pump module and operatively connected to the control link.

### Claim 4 (depends on 1)

The infusion system according to claim 1, wherein the control link is biased to the blocking position.

### Claim 5 (depends on 1)

The infusion system according to claim 1, wherein the infusion system further comprises a securing member configured for locking the coupling structure and the counter-coupling structure in the coupled state to each other in a securing position.

### Claim 6 (depends on 5)

The infusion system according to claim 5, wherein the coupling structure comprises a hook, and the counter-coupling structure comprises a groove, wherein the hook is configured for engagement in the groove to couple the drive mechanism to the plunger.

### Claim 7 (depends on 6)

The infusion system according to claim 6, wherein the securing member is axially movable relative to the plunger-barrel unit and over the hook when the pump module is arranged in the mount, the securing member being axially movable to a clamping position to lock the hook in the groove to couple the drive mechanism to the plunger.

### Claim 8 (depends on 7)

The infusion system according to claim 7, wherein the securing member comprises a clamping sleeve configured to engage the hook and prevent the hook from moving radially outwardly and disengaging the groove.

### Claim 9 (depends on 5)

The infusion system according to claim 5, wherein the securing member is operatively connected to the control link in such a way that the securing member fixes the coupling structure and the counter-coupling structure when the control link is provided in the release position, and the securing member releases the coupling structure and the counter-coupling structure when the control link is provided in the blocking position.

### Claim 10 (depends on 5)

The infusion system according to claim 5, wherein the securing member is a sleeve-shaped hollow body comprising a longitudinal axis oriented in parallel to an axis of the plunger, and the securing member is positionable relative to the coupling structure and the counter-coupling structure in a direction of the axis of the plunger between the securing position and a release position.

### Claim 11 (depends on 5)

The infusion system according to claim 5, wherein the securing member is biased to the securing position.

### Claim 12 (depends on 5)

The infusion system according to claim 5, wherein the infusion system includes an emergency release comprising an actuating element coupled to the securing member so as to manually actuate the securing member and to move the securing member from the securing position to a securing member release position.

### Claim 13 (depends on 12)

The infusion system according to claim 12, wherein the actuating element is coupled to the control link so that, when the control link is provided in the release position, the control link will block and cannot be actuated for moving the securing member from the securing position to the securing member release position.