Device for delivering medicament

Device for delivery of medicament comprising:

• a main housing;
• a container including at least two compartments, wherein each compartment contains a component of the medicament to be injected, and arranged to be connected to a patient delivery means;
• a longitudinally movable piston and a spring arrangement acting on the piston and capable of exerting a force on said components;
• a first holding means arranged and capable of holding the piston in a force-loaded state;
• first activator means capable of acting on the first holding means for releasing the piston, wherein the force from the piston/spring arrangement and the movement causes the compartments to communicate with each other and the components to mix;
• a second holding means capable of stopping the movement of the piston when it has moved a certain first distance after one activation of the first activator means and holding the piston in that position;
• and
• dose adjusting means arranged and capable of adjusting a second distance of the piston/spring arrangement in order to set a predetermined dose;
• wherein a second activator means is capable of acting on the second holding means for releasing the piston;
• upon a subsequent activation of the first activator means, the piston moves the second distance;
• the force from the piston/spring arrangement and the movement causes the mixed components to be ejected through the patient delivery means;
• and
• the second holding means comprises threads arranged on said piston, a first and a second nut threaded on said piston, and an abutment wall arranged adjacent said piston, against which the nuts abut when the piston has moved the first distance, means for displacing the second of said nuts in relation to the first nut axially along said piston, wherein said second holding means is capable of holding said first nut, and wherein the second activator means comprises a front end of said device capable of being movable axially upon penetration of said device into a patient, which axial movement causes said second holding means to release said first nut and hold said second nut, where the force of the piston/spring arrangement causes the first nut to rotate and the piston to move.