Patent ID: 7341575

Claim:
An injection device, comprising: an injector filling assembly, comprising: a cartridge housing configured for receiving a cartridge that has a chamber containing a medicament and first and second ends, the first end including a seal for sealing the medicament in the chamber, and the second end including a stopper sealingly disposed in the chamber; an adapter associated with the cartridge housing and configured for coupling the chamber to an injector for transferring the medicament to the injector for loading the injector; and a post associated with the cartridge housing such that the post is too short to load the injector by biasing the stopper with the post, but is sufficiently long to displace the stopper towards the seal by an amount sufficient to overcome any adhesion between the chamber and the stopper for permitting filling of the injector by drawing the medicament from the chamber by vacuum; and a needle free injector comprising: a needle free syringe assembly comprising: a nozzle member defining a fluid chamber and having a proximal end configured and dimensioned for mating with the second side of the adapter and a distal end, and a plunger movable in the fluid chamber; and a power pack assembly comprising: a housing having a proximal end connectable with the distal end of the nozzle member and a distal end; a trigger assembly; and an energy source operatively associated with the trigger assembly so that movement of the trigger assembly activates the energy source to move the plunger in a first direction to expel medicament from the fluid chamber when the adapter is not connected to the needle free syringe assembly and movement of the plunger in a second direction draws medicament out of the cartridge chamber and into the fluid chamber when the adapter is connected to the needle free syringe assembly.