Multi-chamber, sequential dose dispensing syringe

A - Human Necessities – 61 – M

Patent

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Details

A61M 5/19 (2006.01) A61M 5/315 (2006.01) A61M 39/22 (2006.01)

Patent

CA 2665697

A valve assembly is disclosed which partitions a conventional syringe into proximal and distal chambers to provide a multi-chamber, sequentially dispensing syringe apparatus. Incorporated in the valve assembly is a valved stopper and a separator which filters out gas from dispensed liquid. The valve assembly is actuated by differential pressure of a force greater than the valve assembly displacement force. Key features: (1) fluids in the chambers are kept disparate; (2) valve assembly may be used in conventional syringes; (3) filtering of gas from dispensed liquid; (4) bi-stable valve operation; (5) reflux free operation; (5) a clinch in the separator holds the valve securely closed until the valve is opened by a predetermined, tactilely sensible action.

La présente invention concerne un ensemble valve qui divise une seringue classique en chambres proximales et distales, afin de constituer un appareil de seringue à distribution séquentielle à chambres multiples. Un butoir à valve et un séparateur qui filtre le gaz provenant du liquide distribué sont incorporés dans l'ensemble valve. L'ensemble valve est actionné par une pression différentielle d'une force supérieure à la force de déplacement de l'ensemble valve. Les caractéristiques principales sont les suivantes : (1) maintien des liquides séparés dans les chambres ; (2) possibilité d'utiliser l'ensemble valve dans des seringues classiques ; (3) filtrage du gaz à partir du liquide distribué ; (4) fonctionnement de la valve bistable ; (5) fonctionnement libre à reflux ; (5) maintien, par un rivet dans le séparateur, de la valve fermée de manière sûre jusqu'à ce que la valve soit ouverte par une action prédéterminée tactilement sensible.

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