Attachment for a syringe or a cartridge

1. An attachment for a syringe or a cartridge comprising:

a sealing element having an opening for a medium located in the syringe or cartridge or to be introduced into the syringe or cartridge; and

an actuating device for exerting a force on a wall of the opening in a first functional position such that the opening is closed, and leaves the opening open in a second functional position;

wherein the sealing element includes a conical section through which the opening extends and the actuating device includes a passage channel with an actuating region acting on the conical section, the actuating region being formed by a conical widening of an interior diameter of the passage channel, and the passage channel being aligned with the opening in the sealing element; and

wherein the actuating device exerts an external force for inwardly displacing the wall of the opening and thereby closing the opening preventing fluid flow therethrough.

2. The attachment according to claim 1 , wherein the actuating device and the sealing element are designed for repeated opening and closing of the opening.

3. The attachment according to claim 1 , wherein the sealing element includes elastic material.

4. The attachment according to claim 1 , wherein the sealing element is made of an elastic material.

5. The attachment according to claim 3 , wherein the opening is left open due to the inherent elasticity of the material of the sealing element.

6. The attachment according to claim 1 , wherein the actuating device includes an actuating element movable in relation to a base body of the attachment.

7. The attachment according to claim 6 , further comprising a locking device interacting with the actuating element in such a way that the actuating element is held in at least one position in a closed way.

8. The attachment according to claim 6 , wherein the actuating element is displaceable in the direction of the passage channel of the actuating device.

9. The attachment according to claim 1 , wherein the actuating device is movable towards the sealing device to close the opening.

10. The attachment according to claim 1 , wherein the sealing device includes a conical sealing region for surrounding a protrusion of the syringe or cartridge.

11. The attachment according to claim 10 , in combination with the syringe or cartridge, the conical sealing region surrounding the protrusion.

12. An attachment for a syringe or a cartridge comprising:

a sealing element having a conical section defining opening for a medium located in the syringe or cartridge or to be introduced into the syringe or cartridge, the conical section having a wall normally in an open position in which the opening is open and inwardly deflectable to a closed position in which the opening is closed; and

an actuating device defining a conical actuating region for receiving the conical section of the sealing element, the actuating device movable toward the sealing element to move the wall of the conical section from the open position to the closed position;

wherein the actuating device exerts an external force for inwardly displacing the wall of the opening and thereby closing the opening preventing fluid flow therethrough.

13. The attachment according to claim 12 , wherein the sealing device includes a conical sealing region for surrounding a protrusion of the syringe or cartridge.

14. The attachment according to claim 13 , in combination with the syringe or cartridge, the conical sealing region surrounding the protrusion.

15. An attachment for a syringe or a cartridge comprising:

a sealing element having a male conical portion and defining an opening for a medium located in the syringe or cartridge or to be introduced into the syringe or cartridge; and

an actuating device having a female conical portion for receiving the male conical portion of the sealing element, the actuating device movable toward the sealing element to close the opening;

wherein the actuating device exerts an external force for inwardly displacing a wall of the opening and thereby closing the opening preventing fluid flow therethrough.

16. The attachment according to claim 15 , wherein the wall of the opening is normally in an open position in which the opening is open and inwardly deflectable to a closed position in which the opening is closed.