Ampoule unit with thread
View Patent ↗Ampoule unit for an administering device, comprising an ampoule having a distal end with an opening for dispensing a product and a proximal end with an opening for accommodating a displacement body unit, and the proximal end of the ampoule has a thread which can be placed in a thread engagement with a complementary thread which is part of the displacement unit or a displacement body unit.
1. An ampoule unit for an administering device, the ampoule unit comprising:
an ampoule with a distal end with an opening for dispensing a product and a proximal end with an opening for accommodating a displacement unit; and
an adapter which can be connected to the ampoule such that the distal end of the ampoule is at least partially disposed in the adapter and the adapter is positively connected to the ampoule such that the adaptor is not able to move in rotation or translation relative to the ampoule when connected, wherein
the adapter comprises a thread which can be placed in a thread engagement with a complementary thread which is part of the displacement unit,
the displacement unit comprises a plunger unit having the complementary thread to the thread of the adapter,
the plunger unit comprises a plunger and a plunger rod,
the plunger is disposed in direct contact with the product when the ampoule is connected to the rest of the ampoule unit, and
the plunger is unable to move relative to the plunger rod and rotates in conjunction with rotation of the complementary thread to the thread of the adaptor.
2. The ampoule unit as claimed in claim 1 , wherein the complementary thread is at least partially formed on the plunger unit which can be matingly engaged with the thread of the adapter.
3. The ampoule unit as claimed in claim 2 , wherein the complementary thread is disposed on the plunger or the plunger rod.
4. The ampoule unit as claimed in claim 3 , wherein the plunger is releasably connected to the plunger rod by means of a screw or plug-in connection.
5. The ampoule unit as claimed in claim 3 , wherein the plunger is non-releasably connected to the plunger rod.
6. The ampoule unit as claimed in claim 5 , wherein the plunger and the plunger rod are made as a single piece.
7. The ampoule unit as claimed in claim 3 , wherein the plunger or the plunger rod is configured to be connected to a drive which drives the plunger and the plunger rod in rotation.
8. The ampoule unit as claimed in claim 2 , wherein the plunger unit is configured to rotate about a rotation axis relative to the ampoule due to the thread engagement and is thus moved in the ampoule in a screwing action in a direction of the distal end.
9. The ampoule unit as claimed in claim 1 , wherein a thread pitch of the thread and the complementary thread are less than 2 mm.
10. The ampoule unit as claimed in claim 1 , wherein a thread pitch of the thread and the complementary thread is in a range of 0.5 mm to 2 mm.
11. The ampoule unit as claimed in claim 1 , wherein the thread is an internal thread and the complementary thread is an external thread or vice versa.
12. The ampoule unit as claimed in claim 1 , wherein the adapter is releasably connected to the ampoule.
13. The ampoule unit as claimed in claim 1 , wherein the adapter is non-releasably connected to the ampoule.
14. The ampoule unit as claimed in claim 13 , wherein the adapter is injected or shrink-fitted onto the ampoule.
15. The ampoule unit as claimed in claim 1 , wherein the adapter is a part of a housing of the ampoule or a part of a housing of the administering device.
16. The ampoule unit as claimed in claim 1 , wherein the ampoule unit is configured to be disposed of once the ampoule unit is completely empty.