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AssigneeCrossject
InventorsAlain Navelier, Patrick Alexandre, Bernard Brouquieres, Philippe Gautier
Estimating the term…
The invention concerns the field of needleless syringe having an injector with several ducts. The problem that needs to be solved is the long term compatibility of the injector with the liquid active principle. For that purpose the syringe (1) comprises a cylindrical reservoir (2), closed at its upstream part by a closure element (3) capable of being moved by driving means (70), and closed at its downstream part by an injector (4) comprising at least an injection duct and said reservoir being secured to the body (8) of the syringe, said syringe is such that the diaphragm (5), compatible with the active principle, isolates the latter from the injector (4) and said diaphragm can be passed through by the liquid (6) when pressurized for injection.
A needleless syringe for injection of a liquid active principle contained in a cylindrical reservoir closed at its upstream part by a closure element which can be displaced by a driving means, and closed at its downstream part by a transversable membrane compatible with the active principle and covering an injector which comprises at least one injection duct, and this reservoir being made integral with the body of the syringe, said syringe being characterized in that the reservoir is tubular, the membrane is pinched between the downstream edge of the reservoir and a substantially plane upstream face of the injector, the membrane comprises pre-pierced areas opposite each at least one injection duct, and each pre-pierced area remains closed and leaktight until the liquid is pressurized.
Dependencies are inferred from the claim text.