Peristaltic pump cassette arrangement using multiple tubes and a pressure plate

Patent metadata

Field	Value
Publication number	US-12486837-B2
Application number	US-202418418550-A
Country	US
Kind code	B2
Filing date	Jan 22, 2024
Priority date	Jan 20, 2023
Publication date	Dec 2, 2025
Grant date	Dec 2, 2025

Abstract

A peristaltic pump having a motor with a motor axis, a cassette with a rotor connected to the motor axis and a plurality of rollers, a tube partially surrounding the rotor between the rollers and a pressure plate mounted to a side wall, a spring between the pressure plate and a cover for applying a force to the pressure plate against the tube, and guiding ribs on an inner surface of the pressure plate facing the tube on both sides. The tube has a first end connected to a first vertical tube connector of a first external connector on one side of the rotor and a second end to a second vertical tube connector of a second external connector on the opposite side of the rotor. The first and second vertical tube connectors are connected to a connecting tube of a bridge providing at least one outlet.

First claim

We claim:

1 . A peristaltic pump comprising:
a motor with a motor shaft; and a cassette with a rotor that is connected to the motor shaft, wherein the rotor comprises a plurality of rollers, wherein at least one tube which surrounds the rotor partially is located between the plurality of rollers and a pressure plate which is mounted to one of two side walls, wherein a spring is located between the pressure plate and a cover for applying a force to the pressure plate against the at least one tube, wherein the cover comprises a locking lever configured to engage with outer hooks arranged on top of each side wall by rotating the locking lever and wherein the pressure plate comprises guiding ribs located on the inner surface of the pressure plate facing the at least one tube and the guiding ribs are located on both sides of the at least one tube, characterised in that the at least one tube is connected with a first end to a first vertical tube connector of a first external connector on one side of the rotor and with a second end to a second vertical tube connector of a second external connector on the opposite side of the rotor, wherein the first and second vertical tube connector of the external connectors are connected to a connecting tube of a bridge providing at least one outlet, wherein the bridge comprises on its outer ends protrusions as connecting elements which engage into recesses of a side wall plate of the side wall, wherein the bridge is configured to engage into the side walls on both sides of the rotor and the locking lever is configured to rotate in a closed position only when the protrusions of the bridge engage with the recesses of the side walls.

2 . The peristaltic pump of claim 1 , wherein the cassette comprises a maximum of up to three tubes which are located next to each other and separated by the guiding ribs of the pressure plate.

3 . The peristaltic pump of claim 1 , wherein the pressure plate comprises on both sides an extension for engaging into vertical slots in each side wall for vertically aligning and guiding the pressure plate.

4 . The peristaltic pump of claim 3 , wherein the bridge comprises a grip which is arranged to extend from the bridge on the opposite side of the rotor.

5 . The peristaltic pump of claim 1 , wherein the vertical tube connectors of the external connectors join into a horizontal collector tube.

6 . The peristaltic pump of claim 5 , wherein the first external collector comprises a maximum of three downwards projecting outlets.

7 . The peristaltic pump of claim 1 , wherein up to three cassettes are attached to one another by bayonet couplings and the motor shaft is extended.

8 . The peristaltic pump of claim 7 , wherein the motor shaft comprises on its end cross-shaped couplings for its extension.

9 . The peristaltic pump of claim 1 , comprising at least two cassettes attached to the motor, wherein a gearing is arranged between the at least two cassettes.

10 . The peristaltic pump of claim 1 , wherein the locking lever comprises two circular guiding components on each side.

11 . The peristaltic pump of claim 10 , wherein each circular guiding component is open on one end and closed on the opposite end.

12 . The peristaltic pump of claim 10 , wherein each side wall's outer hooks engage into openings of the respective two circular guiding components.

13 . The peristaltic pump of claim 1 , wherein the locking lever comprises two circular slits and the cover comprises two inner hooks for engaging into the two circular slits of the locking lever.

Assignees

• Stratec Se

Inventors

• Trump Martin
• Urbanczyk Marek
• Barenthin Volker

Classifications

• F04B43/1253 Primary

  by using two or more rollers as squeezing elements, the rollers moving on an arc of a circle during squeezing · CPC title

• F04B43/1284 Primary

  Means for pushing the backing-plate against the tubular flexible member · CPC title