Patent ID: 8632506

Claim:
A medical delivery system comprising: a container having a second fastening means and adapted to contain 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, the container comprising a proximal part having a circular side wall defining a proximal circular end surface; 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 first fastening means which during fastening of the container to the dosing assembly engages the 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, at least a part of said predetermined movement being a concurrent axial and rotational movement which is less than one revolution; wherein a sidewall of one of the first and second fastening means defines at least one projection extending in a radial direction, each of the at least one projection being adapted to engage a corresponding groove defined in a sidewall of the other one of the first and second fastening means; wherein a first coding mechanism is defined by a coding geometry of each of the first and the second fastening means, the first coding mechanism being adapted to prevent said predetermined movement unless each of the first and the second fastening means defines a predetermined coding geometry; and wherein the coding geometry is selected from a predetermined group of coding geometries; and wherein the system further comprises a second coding mechanism defined by one or more protrusions and/or indentations arranged along the proximal end surface of the container, and mating one or more corresponding indentations and/or protrusions at the distal end surface of the dosing assembly.