Metering apparatus

A - Human Necessities – 61 – M

Patent

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Details

A61M 15/00 (2006.01) A61J 3/00 (2006.01)

Patent

CA 2255734

An apparatus (100) adapted for applying to a carrier (C) a suspension (S) comprising a suspending agent and a powdered medicament. The apparatus (110) includes a reservoir (110), a junction container (120) adapted to contain a liquid, an outlet line (130) extending from the reservoir (110) and through the junction container (120) to a pump (P), a nozzle (160) connected to the pump (P) and a sonicator (150) operatively connected to the junction container (120). The reservoir (110) is adapted to maintain the agent and the medicament admixed in suspension. The nozzle (160) is formed from an inner cylinder (161) disposed within an outer cylinder (162), thereby defining a space (X) therebetween, and includes a purge line (165) fluidly connected with the outer cylinder (162) for providing a gas jet to the space (X). The sonicator (150) creates waves in the liquid in the container (110) to help prevent the suspension (S) from flocculating as it travels through the outlet line (130) from the reservoir (110) and to the pump (P). The pump (P) expels the suspension (S) through the nozzle (160) to the carrier (C), and a gas jet (GJ) from the purge line (165) prevents capillary forces from allowing the suspension (S) to collect around the tip (T) of the inner cylinder (161) of the nozzle (160).

Appareil (100) permettant d'appliquer sur un support (C) une suspension (S) contenant un agent de suspension et un médicament en poudre. L'appareil (110) comprend un réservoir (110), un récipient de jonction (120) conçu pour contenir un liquide, un tuyau de sortie (130) partant du réservoir (110), traversant le récipient de jonction (120) et aboutissant à une pompe (P), un ajutage (160) relié à la pompe (P) et un dispositif de traitement ultrasonique (150) relié fonctionnellement au récipient de jonction (120). Le réservoir (110) est conçu pour maintenir l'agent et le médicament mélangés en suspension. L'ajutage (160) est formé d'un cylindre interne (161) disposé à l'intérieur d'un cylindre externe (162), définissant un espace (X) entre eux, et comprend un tuyau de purge (165) en communication fluidique avec le cylindre externe (162) qui propulse un jet de gaz dans l'espace (X). Le dispositif de traitement ultrasonique (150) produit des vagues dans le liquide contenu dans le récipient (110), ce qui contribue à empêcher la suspension (S) de floculer au moment où elle traverse le tuyau de sortie (130) allant du réservoir (110) à la pompe (P). Cette dernière expulse la suspension (S) par l'ajutage (160) de façon à l'amener sur le support (C), et un jet de gaz (GJ) venant du tuyau de purge (165) empêche la suspension (S) de se rassembler, sous l'influence des forces capillaires, autour de la pointe (T) du cylindre interne (161) de l'ajutage (160).

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