Patent ID: 6770052
Filing Date: 2004-08-03
Classification: A61M

Abstract:
An automatic injection device containing a pre-loaded charge of medicament for automatically self-administering the medicament upon actuation thereof, the device comprising:a housing assembly having an interior chamber, the interior chamber including a dry compartment containing a dry medicament component, and a wet compartment containing a liquid component to be mixed with the dry component; a seal structure between the dry compartment and the wet compartment, the seal structure being initially in a sealing condition that maintains the dry component sealed from the wet component, the seal structure being converted to a mixing condition as a result of activation of the device; a fluid distributing member disposed between the liquid component and the dry medicament component; a needle assembly that dispenses the charge of medicament from the housing; an activation assembly carried by the housing and including a stored energy source, wherein activation of the activation assembly releases the stored energy from the stored energy source, and wherein the release of the stored energy causes a) the seal structure to be converted from the sealing condition to the mixing condition and thereby permit the liquid component to pass there through, b) the liquid component to be forced through the fluid distributing member and distributed to the dry component and facilitate mixing and dissolution of the dry medicament component in the liquid component, and c) force the mixed liquid and dry components through the needle assembly.