US Patent 10500338 Prefilled disposable injection device

A drug delivery device comprising a drug container extending between a distal end and a proximal end and is capable of being compressed into a single plane; a body extending between proximal and distal ends comprising a hollow space for containing the drug container; and a plunger extending between proximal and distal ends, wherein the distal end of the plunger engages telescopically with the proximal end of the body, wherein the plunger comprises at least one pair of protrusions, wherein the protrusion is capable of compressing the drug container as the plunger moves towards the proximal end of the drug delivery device, by applying a force to the drug container that is perpendicular to the movement of the plunger.