Crossject

Alain Navelier

Patrick Alexandre

Bernard Brouquieres

Philippe Gautier

Denis Roller

Claude Mikler

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 () comprises a cylindrical reservoir (), closed at its upstream part by a closure element () capable of being moved by driving means (), and closed at its downstream part by an injector () comprising at least an injection duct and said reservoir being secured to the body () of the syringe, said syringe is such that the diaphragm (), compatible with the active principle, isolates the latter from the injector () and said diaphragm can be passed through by the liquid () when pressurized for injection.

Needleless syringe with membrane isolating a multiple duct injector

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 () comprises a cylindrical reservoir (), closed at its upstream part by a closure element () capable of being moved by driving means (), and closed at its downstream part by an injector () comprising at least an injection duct and said reservoir being secured to the body () of the syringe, said syringe is such that the diaphragm (), compatible with the active principle, isolates the latter from the injector () and said diaphragm can be passed through by the liquid () when pressurised for injection.

The invention concerns the field of needleless syringes for injecting an active principle for therapeutic purposes. More particularly, it concerns a needleless syringe for injecting an active principle () initially set between an injector () comprising at least an injection nozzle, said injector being contacted with the skin, and a wall () mobile under the effect of a propelling system () pressurizing and expelling the active principle through the injector located at the syringe downstream end (). In order to produce nozzles in a considerable injector thickness and to control the jet coherence distance, said injector () comprises at least two elements () whereof the contact surfaces (') are oriented towards the skin, at least a groove () forming an injection nozzle in the assembly of said elements.

Needleless syringe comprising an injector with nested elements

The invention concerns the technical field of needleless syringes for injecting an active principle for therapeutic purposes. More particularly, it concerns a needleless syringe for injecting an active principle ( ) initially set between an injector ( ) comprising at least an injection nozzle ( ) contacted with the skin and a wall ( ) mobile under the effect of a propelling system ( ) pressurizing and expelling the active principle through the injector located at the downstream end ( ) of the syringe. In order to produce nozzles passing through a considerable injector thickness and to control the jet coherence distance, said injector ( ) comprises a support ( ) with at least a housing ( ) wherein are stacked plates ( ) each comprising an equal number of orifices aligned to form at least a nozzle ( ) through the stack.

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Pierrefeu du Var, France

Alain Navelier