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AssigneeCrossject
InventorsPatrick Alexandre, Guy Delannoy, Philippe Gautier, Denis Roller
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The invention relates to a needleless syringe (1), comprising the following' successively: a gas generator, a gas expansion chamber (3), a means for retaining particles of the active agent and a tube (6) for ejecting said particles. The main characteristic of the inventive syringe is that the gas generator is a pyrotechnic generator (2), comprising a pyrotechnic charge (10) which generates gas, a gas generator and an initiation device. The invention is also characterized in that the retaining means comprise at least one lid (8), which is fixed to the ejection tube and is configured to break under the influence of the gases generated by the combustion of said charge (10).
A needleless syringe (1) comprising, in succession, a gas generator, a gas expansion chamber (3, 23, 43), a means for retention of the particles of an active principle, and a tube (6, 26, 46) for ejection of said particles, characterized in that the gas generator is a pyrotechnic generator (2) comprising a pyrotechnic charge (10) which generates gas, and an initiation device, and in that the retention means comprises at least one protective seal (8, 28, 48) which is fixed to the ejection tube (6, 26, 46) and is intended to burst under the effect of the gases produced by the combustion of said charge (10).
Dependencies are inferred from the claim text.