Drive head for a syringe pump
AssigneeFresenius Vial SAS
InventorFrancois Rochette
Life of this patent
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Abstract
The invention concerns a connection device for connecting a first reservoir with a second reservoir, having a first section (11) for arranging the first reservoir (5) closed with a seal (51); a second section (12) for arranging the second reservoir; and a piercing element (2) which penetrates with a piercing end (21) the seal (51) of the first reservoir (5) when the first reservoir (5) is arranged at the first section (11). According to the invention, the piercing element (2) can be moved from a first position into a second position, wherein it blocks in the first position a flow connection between the first and the second section (11, 12), while in the second position it allows for a flow connection between the first and the second section (11, 12).
Claims20
Connection device for connecting a first reservoir with a second reservoir, having
- a first section (11) for arranging the first reservoir (5) closed with a seal (51);
- a second section (12) for arranging the second reservoir;
- and
- a piercing element (2), which penetrates with a piercing end (21) the seal (51) of the first reservoir (5) when the first reservoir (5) is arranged at the first section (11),
- characterized in that
- the piercing element (2) comprises a channel and can be moved from a first position into a second position, wherein
- in the first position the channel of the piercing element (2) is closed and a flow connection between the first and the second section (11, 12) is blocked, while
- in the second position the channel of the piercing element (2) is released and a flow connection between the first and the second section (11, 12) is made possible.
Connection device according to any one of the previous claims, characterized in that the piercing element (2) is arranged in movable fashion in a passage opening (3) relative to the first and the second section (11, 12).
Connection device according to any one of the previous claims, characterized in that the channel is formed as a recess in an outer surface of the piercing element (2).
Connection device according to any one of the previous claims, characterized in that the piercing element (2) comprises means for enhancing a friction force between an outer surface of the piercing element (2) and a section of the seal (51) of the first reservoir (5), which after penetrating the piercing end (21) of the piercing element (2) adjoins the outer surface of the piercing element (2), wherein the means for enhancing the friction force comprise friction-enhancing structures in the outer surface of the piercing element (2), in particular a roughing of the outer surface, and/or a friction-enhancing coating arranged at the outer surface of the piercing element.
Connection device according to any one of the previous claims, characterized by a limit stop (63), which defines the second position of the piercing element (2).
Connection device according to any one of the previous claims, characterized in that the piercing element (2) comprises at least one discharge opening (260).
Connection device according to the previous claim, characterized in that the discharge opening (260) is inserted in a casing of a piercing element (2) which is designed at least in sections as a hollow body, preferably inserted in a piercing element (2) which is basically designed as a hollow cylinder.
Connection device according to any one of the two preceding claims, characterized in that the discharge opening (260) is arranged in the piercing element (2) in such a way, that when the piercing element (2) is in the second position, in which a flow connection (11, 12) is made possible between the first and the second section (11), it is located at least in sections in an interior of a reservoir (5) arranged at the first section (11).
Dependencies are inferred from the claim text.