Cassette module

Patent metadata

Field	Value
Publication number	US-2016184501-A1
Application number	US-201414910757-A
Country	US
Kind code	A1
Filing date	Aug 6, 2014
Priority date	Aug 9, 2013
Publication date	Jun 30, 2016
Grant date	—

Abstract

The present invention relates to a cassette module for controlling fluid flows, in particular for use in blood treatment systems or in infusion systems, wherein the cassette module comprises at least one base body having means for the flow guidance of at least one fluid flow and at least two membranes which are at least sectionally directly or indirectly in contact with the base body, wherein at least one actuation element is arranged between the membranes by means of which the means for the flow guidance can be acted on.

First claim

1 . A cassette module for controlling fluid flows, in particular for use in blood treatment systems or in infusion systems, wherein the cassette module comprises at least one base body having means for the flow guidance of at least one fluid flow, in particular of at least one liquid flow, and at least two membranes which are at least sectionally directly or indirectly in contact with the base body, wherein at least one actuation element is arranged between the membranes by means of which the means for the flow guidance can be acted on.

2 . A cassette module for controlling fluid flows, in particular for use in blood treatment systems or in infusion treatments, wherein the cassette module comprises at least one base body having means for the flow guidance of at least one fluid flow and at least one membrane which is at least sectionally in connection directly or indirectly with the base body, wherein the membrane has a single-layer structure whose layer consists of or comprises a material absorbing laser light or has a multilayer structure which has at least one layer transmitting the laser light and at least one layer absorbing the laser light, wherein the outer layer absorbing the laser light forms the connection region of the membrane to at least one further component of the cassette module.

3 . A cassette module in accordance with claim 2 , wherein said at least one fluid flow includes at least one liquid flow and said at least one membrane includes at least two membranes and wherein at least one actuation element is arranged between the membranes by means of which the means for the flow guidance can be acted on.

4 . A cassette module in accordance with claim 2 , characterized in that the further component to which the membrane is connected is the base body or a part of the base body of the cassette module, the actuation element or a further membrane.

5 . A cassette module in accordance with claim 2 , characterized in that the membrane has an at least three-layered structure, wherein at least two layers absorbing laser light and at least one layer arranged therebetween and transmitting laser light are present.

6 . A cassette module in accordance with claim 1 , characterized in that the cassette module has at least one first functional layer and at least one second functional layer, wherein the first functional layer has means for the flow guidance of at least one fluid flow, and wherein the second functional layer is arranged between the two membranes.

7 . A cassette module in accordance with claim 6 , characterized in that the cassette module has a third functional layer which has means for actuating one or both membranes.

8 . A cassette module in accordance with claim 7 , characterized in that the means for actuating the membrane are pneumatic means or hydraulic means, in particular chambers or channels, in which excess pressure or underpressure is present or can be generated.

9 . A cassette module in accordance with claim 1 , characterized in that the means for the flow guidance of a fluid flow has one or more channels, valve sections and pump sections.

10 . A cassette module in accordance with claim 1 , characterized in that at least one, a plurality of or all functional layers comprise flexurally stiff material, preferably plastic.

11 . A cassette module in accordance with claim 1 , characterized in that the membrane or membranes is/are elastic membranes.

12 . A machine, in particular a blood treatment machine or infusion machine, having at least one slot in which at least one cassette module in accordance with claim 1 is located.

13 . A method of manufacturing a cassette module in accordance with claim 1 , characterized in that the connection of the membrane to at least one further component of the cassette module takes place by means of transmission welding using a laser, wherein the heating of the at least one layer of the membrane absorbing the laser light takes place.

14 . A method in accordance with claim 13 , characterized in that the connection of the membrane to at least one further component takes place in the state in which the membrane is inserted into the base body.

Assignees

• Fresenius Medical Care De Gmbh

Inventors

• Kreber Stefan
• Weis Manfred
• Wenke Marina
• Leick Lothar

Classifications

• A61M2207/00

  Methods of manufacture, assembly or production · CPC title

• A61M2205/3334

  Measuring or controlling the flow rate · CPC title

• A61M5/16881

  Regulating valves (on-off valves, e.g. clamps A61M39/28) · CPC title

• A61M2205/12

  with interchangeable cassettes forming partially or totally the fluid circuit · CPC title

• B29C66/723

  being multi-layered (B29C66/7292, B29C66/72941 take precedence) · CPC title