Needleless syringe with two injection speed levels

Details Needleless syringe with two injection speed levels Needleless syringe with two injection speed levels

A - Human Necessities

61

M

A61M 5/30 (2006.01) A61M 5/303 (2006.01) A61M 5/48 (2006.01)

Patent

CA 2400071

The invention concerns the field of needleless syringes for injecting a liquid active principle. It improves bioavailability by providing injection at two speed levels. The syringe comprises a reservoir (2) contained between an injector (3) and push means subjected to the action of a gas generator (7), said push means comprising an end, directed towards the active principle, which forms a delivery head (4) whereof the cross-section is smaller than the powering head (6) cross-section, the powering travel (C1) in the power cylinder (10) being shorter than the height (H1) of the active principle reservoir (2).

La présente invention se situe dans le domaine des seringues sans aiguille pour l'injection de principe actif liquide. Elle améliore la biodispobilité par la réalisation de deux niveaux de vitesse d'injection. La seringue comporte un réservoir (2) compris entre d'une part un injecteur (3) et d'autre part un moyen de poussée soumis à l'action d'un générateur de gaz (7), ledit moyen de pousée comportant une extrémité, dirigée vers le principe actif, qui constitue une tête de refoulement (4) dont la section transversale est inférieure à la section transversale de la tête motrice (6), la course motrice (C1) dans le cylindre moteur (10) étant inférieure à la hauteur (H1) du réservoir (2) de principe actif. Image

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