Pyrotechnically driven needle-free liquid jet injection device with low-cost components and production

摘要

An easy, precise and low-cost manufacturing of a pyrotechnically driven needle-free liquid jet injection device for performing a needleless hypodermic injection of a liquid medication contained in the device into a body, said device comprising a driving unit including pyrotechnical means for generating within the device a pressure necessary for injecting the medication, said means comprising a gas generating pyrotechnical material and an actuation device for igniting the pyrotechnical material, is achieved by said injection device comprising a one-piece ductile pressure shell surrounding at least a portion of the pyrotechnical material, said pressure shell being formed by a single deep-drawn material, preferably metal, as basic construction material for the shell.