Method and device for the sterile connection of pipes

Patent metadata

Field	Value
Publication number	US-10569478-B2
Application number	US-201715465915-A
Country	US
Kind code	B2
Filing date	Mar 22, 2017
Priority date	Aug 18, 2010
Publication date	Feb 25, 2020
Grant date	Feb 25, 2020

Abstract

A method is described for opening a heat bonded sterile connection that includes a skin of material blocking flow between the connection site. The method includes applying external pressure to the connection site.

First claim

The invention claimed is:

1. A device for the sterile connection of tubes comprising
a first receiving device for receiving a first tube;
a second receiving device for receiving a second tube;
a first heater adjacent to the first receiving device for heating a separating region of a first tube arranged on the first receiving device and a second heater adjacent to the second receiving device for heating a separating region of a second tube arranged on the second receiving device, the first heater being separate from the second heater, wherein at least a first clamping device for clamping a tube is arranged on each receiving device and each of the first and second heaters is incorporated into its respective first clamping device; and
the device being operable to separate each of the first and second tubes in the heated separating region into a first and a second tube portion, wherein
the first and second receiving devices are each designed to hold the respective first tube portion such that it extends at least in part along a plane, and at least one of the two receiving devices is mounted rotatably about an axis of rotation that runs at least approximately perpendicularly to the plane, and wherein
the device is configured such that, after separation of the first and second tubes, an end of the first tube portion of the first tube can be brought into mechanical contact with an end of the first tube portion of the second tube with rotation of the first and/or second receiving device about the axis of rotation.

2. The device as claimed in claim 1 , comprising a high-frequency voltage generator electrically connected to at least one of the first clamping devices and configured to introduce a high-frequency voltage into the respective first clamping device so as to generate in the region of the clamping device an electrical high-frequency field that heats the separating region of the tube clamped by the clamping device.

3. The device as claimed in claim 1 , wherein each of the first clamping devices is arranged on the respective receiving device such that it co-rotates upon rotation of the receiving device.

4. The device as claimed in claim 1 , further comprising a second stationary clamping device adjacent each receiving device, the device being operable to generate a movement of the first and/or second receiving device, a tensile and/or shear force being exerted onto the first and/or second tube as a result of a movement of the first and/or second receiving device relative to its associated second stationary clamping device, such that said tube is separated in the heated separating region into the first and second tube portion.

5. The device as claimed in claim 4 , comprising a first arm connected to the first receiving device and a second arm connected to the second receiving device, the two arms being coupled to one another such that they are rotatable relative to one another about a common axis of rotation in a scissor-like manner, such that, upon rotation of the arms, rotation of the receiving devices is generated.

6. The device as claimed in claim 4 , wherein the device generates a translation of the first and/or second receiving device.

7. The device as claimed in claim 1 , wherein the first and/or second receiving device is/are circular in plan view.

8. The device as claimed in claim 1 , wherein the first and/or second receiving device has a receiving body that has a recess in a side oriented parallel to the axis of rotation for insertion of the first or second tube.

9. A device for the sterile connection of tubes comprising
a first receiving device for receiving a first tube;
a second receiving device for receiving a second tube;
a first arm connected to the first receiving device and a second arm connected to the second receiving device, the two arms being coupled to one another such that they are rotatable relative to one another about a common axis of rotation in a scissor-like manner, such that, upon rotation of the arms, rotation of the receiving devices is generated;
a heater for heating a separating region of a first tube arranged on the first receiving device and a heater for heating a separating region of a second tube arranged on the second receiving device;
at least one clamping device for clamping a tube arranged on the receiving device assigned to each receiving device;
a high-frequency voltage generator electrically connected to at least one of the clamping devices and configured to introduce a high-frequency voltage into the respective clamping device so as to generate in the region of the clamping device an electrical high-frequency field that heats the separating region of the tube clamped by the clamping device; and
the device being operable to separate each of the first and second tubes in the heated separating region into a first and a second tube portion, wherein
the first and second receiving devices are each designed to hold the respective first tube portion such that it extends at least in part along a plane, and at least one of the two receiving devices is mounted rotatably about an axis of rotation that runs at least approximately perpendicularly to the plane, and wherein
the device is configured such that, after separation of the first and second tubes, an end of the first tube portion of the first tube can be brought into mechanical contact with an end of the first tube portion of the second tube with rotation of the first and/or second receiving device about the axis of rotation and is further operable to generate a movement of the first and/or second receiving device, a tensile and/or shear force being exerted onto the first and/or second tube as a result of a movement of the first and/or second receiving device, such that said tube is separated in the heated separating region into the first and second tube portion.

10. The device as claimed in claim 9 , wherein at least one further clamping device for clamping a tube arranged on the receiving device is associated with each receiving device and is arranged on the respective receiving device such that it co-rotates upon rotation of the receiving device.

11. The device as claimed in claim 9 , wherein the device generates a translation of the first and/or second receiving device.

12. The device as claimed in claim 9 , wherein the first and/or second receiving device is/are plate-like in form.

13. The device as claimed in claim 9 , wherein the first and/or second receiving device has a receiving body that has a recess in a side oriented parallel to the axis of rotation for insertion of the first or second tube.

Assignees

• Fresenius Kabi Deutschland Gmbh

Inventors

• Schwalm Michael
• Bruckner Thomas

Classifications

• B29C66/857

  Medical tube welding machines · CPC title

• B29C66/8416

  of different thickness · CPC title

• B29C65/7802

  Positioning the parts to be joined, e.g. aligning, indexing or centring · CPC title

• B29C66/91221

  of the parts to be joined · CPC title

• B29C66/81871

  of the welding jaws · CPC title