Patent ID: 8613731

Claim:
A medical delivery system comprising: a container structured to house a medicament in a chamber defined by the container and a slidably arranged piston which is moveable in a distal direction towards an outlet so as to reduce the volume of the chamber and expel the medicament through the outlet; a dosing assembly adapted to be fastened to the container, so as to allow a driver of the dosing assembly to move the piston of the container in the distal direction; wherein the dosing assembly defines a substantially proximal facing surface of a first fastening means which during fastening of the container to the dosing assembly engages a substantially distal facing surface of a second fastening means of the container whereby the container is fastened to the dosing assembly through a predetermined movement defined by at least one of the first and the second fastening means, the predetermined movement being less than one revolution; wherein a sidewall of the second fastening means defines at least two projections extending in a radially outward direction, each of the at least two projections being adapted to engage a corresponding groove defined in a sidewall of the first fastening means; wherein the second fastening means defines an asymmetrical pattern defining no line of symmetry in a plane transverse to an axial direction of the device; and wherein the system further comprises an axially extending coding mechanism extending from and defined by a proximal end surface of the container and a corresponding distal end surface of the dosing assembly.