Patent ID: 11904141
Assignee: SANOFI-AVENTIS DEUTSCHLAND GMBH
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 14:
15. A drug delivery system, the system comprising:
a drug delivery device comprising:
an elongated housing;
a cartridge holder removably coupled to the elongated housing;
a cartridge sized and shaped to be contained within the cartridge holder and operably responsive to a dose setting mechanism arranged inside of the elongated housing;
a first coding feature provided at a proximal end face of the cartridge holder; and
a ring shaped collar fitted into the elongated housing and positionally fixed to the elongated housing, wherein an angle of contact faces between the ring shaped collar and the elongated housing allows easy assembly but difficult removal, and wherein the ring shaped collar comprises a second coding feature that is configured to engage or to pass through the first coding feature provided at the proximal end face of the cartridge holder,
wherein the elongated housing and the cartridge holder can be correctly assembled only by inserting a proximal end of the reservoir holder into a distal end of the elongated housing when the first coding feature and the second coding feature match each other.