Dose setting limiter

A limiting mechanism which prevents the setting of a dose, which exceeds the amount of liquid left in a cartridge of an injection device is disclosed. The injection device is the type where a dose is set by rotating a dose setting member (30) relative to a driver (31) and away from a fixed stop in the injection device. The dose setting member interfaces the driver such that the dose setting member can be rotated in one direction without rotating the driver. The dose is injected by rotating back the dose setting member which carries the driver with it during the backward rotation. Rotating the driver causes a piston rod (3) to move forward inside the cartridge and expel some of the liquid contained in the cartridge. The driver is provided with a track (33) having a length which is related to the total amount of liquid in the cartridge and which track is engaged by a track follower (32) coupled to the dose setting member to follow rotation of this dose setting member. Each time a dose is set and injected, the track follower moves further into the track. When the track follower reaches the end of the track the dose setting member can not be rotated further, and a dose larger than the remaining liquid in the cartridge cannot be set.