Reusable injection device for distributing a preselected dose
AssigneeByk Gulden Lomberg Chemische Fabrik GmbH
InventorPeter Michel
Life of this patent
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Abstract
A syringe-type injection device for dispensing a preset dose of a liquid drug includes two sleeve-like components releasably connected with each other so as to be aligned in axial direction. One of the sleeve-like components is a holder for a dispensing mechanism and the other of the sleeve-like components is adapted to accommodate an ampoule and a cannula. The dispensing mechanism includes an axially movable piston rod for actuating a plug of the ampoule. The piston rod has a radially projecting cam follower and the holder defines at least one axially extending slot having a predetermined length, wherein the cam follower is received by the at least one slot, such that only a single dose can be dispensed from an ampoule by an axial movement of the piston rod.
Claims13
A syringe-type injection device including a dispensing mechanism for dispensing a preset dose of liquid drug, comprising:
- first and second sleeve-like components releasably connected to each other so as to be aligned in an axial direction, wherein the first sleeve-like component is a holder for the dispensing mechanism and the second sleeve-like component is an ampoule sleeve having an ampoule and a cannula means for connecting the ampoule with the ampoule sleeve;
- a plug in the ampoule;
- an axially movable piston rod extending from said holder through the dispensing mechanism for actuating the plug of the ampoule, wherein said piston rod has a radially projecting cam follower;
- at least one axially extending slot defined in said holder, wherein said slot has a predetermined length and wherein the cam follower is received by the at least one slot such that only a single dose can be dispensed from the ampoule by an axial movement of the piston rod;
- the piston rod having a piston rod neck for acting on the plug of the ampoule;
- and
- a cap for connecting the dispensing mechanism with the holder such that it cannot be disengaged.
A syringe-type injection device including a dispensing mechanism for dispensing a preset dose of a liquid drug, comprising:
- first and second sleeve-like components releasably connected to each other so as to be aligned in an axial direction, wherein the first sleeve-like component is a holder for the dispensing mechanism and the second sleeve-like component is an ampoule sleeve having an ampoule and a cannula means for connecting the ampoule with the ampoule sleeve the ampoule having a plug;
- an axially movable piston rod extending from said holder through the dispensing mechanism for actuating the plug of the ampoule;
- a radially projecting cam follower on the piston rod;
- a plurality of axially extending slots defined on the holder, wherein said slots have different predetermined lengths and wherein the cam follower is received by a respective slot, such that only a respective single preset dose can be dispensed from the ampoule by an axial movement of the piston rod.
Dependencies are inferred from the claim text.