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

Claim 0:
1. A coding system for a drug delivery device, comprising:
an elongated housing of the drug delivery device;
a first coding ring fitted into the elongated housing and positionally fixed to the elongated housing, wherein the first coding ring comprises a first coding feature associated with the elongated housing and wherein an angle of contact faces between the first coding ring and the elongated housing allow easy assembly but difficult removal; and
a reservoir holder of the drug delivery device, the reservoir holder comprising a second coding feature disposed at a proximal end face of the reservoir holder,
wherein the first coding feature and the second coding feature are keyed to each other, and
wherein the elongated housing and the reservoir 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.