FIELD: medicine.
SUBSTANCE: needleless injection device comprises a pyrotechnic gas generator with a pyrotechnic charge formed by two energy materials with different burning, at least one piston, reserved liquid agent and an injection nozzle. One of two energy materials is core and enclosed by the second energy material which is peripheral. And the entire external surface of the core energy material contacts to the internal surface of the peripheral energy material.
EFFECT: invention allows for high reliability and reproducibility in adjusting pressure profiles.
18 cl, 3 dwg, 2 ex
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