Patent ID: 8574214

Claim:
An Injection cartridge configured for assembly within a cartridge holder component of an injection device, where the injection cartridge comprises a) a barrel having a distal end and a proximal end; b) a housing insert at least partially received in the distal end of the barrel and having a proximal end and a distal end extending beyond the distal end of the barrel; c) a central opening in the housing insert configured for at least partially receiving a removable tamper-proof plug having a hub configured to prevent contamination of the central opening or a needle assembly comprising a needle with a distal tip, a proximal tip and a hub surrounding the needle; d) at least two snap fit connectors within the central opening of the housing insert configured to guide, align and hold the hub in at least two axial positions within the central opening; e) a rubber sealing disc having a distal end and a central opening, where the rubber sealing disc covers the distal end of the housing insert such that the two central openings are aligned; and f) a metal cap having a hole to allow access to the two central openings, where the cap covers the distal ends of the rubber sealing disc and housing insert and is crimped on the distal end of the barrel to hold the housing insert within the barrel such that no part of the housing insert protrudes outside the metal cap, wherein the injection cartridge is configured to fit completely within a cartridge holder of an injection device.