Wet/dry automatic injector assembly

摘要

The present invention is directed to an automatic injection device (10) containing a pre-loaded charge of medicament for automatically self-administering the medicament upon actuation thereof. The automatic injection device includes a housing assembly (110) having an interior chamber, an activation assembly (120) and a needle assembly (140) for dispensing a dissolved medicament to a user. A dry compartment (160) for storing a predetermined dry charge of dry medicament is located within the interior chamber. A wet compartment (150) for storing a predetermined amount of liquid injection solution is also located within the interior chamber. A separation assembly (180) separates the dry compartment from the wet compartment. The separation assembly prevents transfer of the liquid injection solution from the wet compartment to the dry compartment prior to activation of the automatic injection device. One or more medicament support assemblies (190) located within the dry compartment prevent the passage of undissolved medicament from the dry compartment.