Dosing and delivering system

B - Operations – Transporting – 05 – B

Patent

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Details

B05B 11/00 (2006.01) A61M 11/00 (2006.01) A61M 15/00 (2006.01) B05B 5/025 (2006.01) B05B 5/16 (2006.01) B05B 11/02 (2006.01)

Patent

CA 2360411

The present invention relates to a dispensing device (1) for a fluid (10), the dispensing device (1) comprising a reservoir (11), a shaft (12), a back seal (13), a damper (14), a piston (151) and a one-way valve (16), the back seal (13) sealing a first end of the reservoir and being displaceable along the shaft, the valve being on the second end of the reservoir, the piston being fixed to one end of the shaft, the piston being located between the valve and the damper, the damper being also fixed to the shaft, the damper being located between the piston and the back seal, whereby the piston has an opened position (151) and a closed position (152), the open position allowing fluid communication between the valve and the part of the reservoir between the piston and the back seal, the displacement of the piston between the opened and the closed position being induced by a displacement of the shaft along its own axis, the pressure in the area comprised between the valve and the piston reducing when the piston is moved from its closed position towards its opened position, the damper collapsing when the piston is moved from its closed position towards its opened position, the only fluid flow from the part of the reservoir situated between the damper and the back seal and the part of the reservoir situated on the other side of the damper being a connecting passage (140) situated in the damper (14) when the piston is moved from its opened position towards its closed position.

La présente invention concerne un dispositif (1) de distribution de fluide (10) comprenant : un réservoir (11), une tige (12), un joint arrière (13), un clapet (14), un piston (151) et une valve anti-reflux (16). Le joint arrière (13), qui peut se déplacer le long de la tige, ferme hermétiquement une première extrémité du réservoir ; la valve se trouve sur la deuxième extrémité du réservoir ; le piston est fixé à une extrémité de la tige, entre la valve et le clapet ; le clapet est également fixé sur la tige, entre le piston et le joint arrière. Le piston possède une position ouverte (151) et une position fermée (152), la position ouverte permettant une communication fluidique entre la valve et la partie du réservoir située entre le piston et le joint arrière, le déplacement du piston entre la position ouverte et la position fermée étant induit par un déplacement de la tige le long de son propre axe. Lorsque le piston est déplacé de sa position fermée jusque dans sa position ouverte, la pression dans la zone comprise entre la valve et le piston se réduit et le clapet descend ; lorsque le piston est déplacé de sa position ouverte jusque dans sa position fermée, le seul écoulement fluidique depuis la partie du réservoir située entre le clapet et le joint arrière jusque dans la partie du réservoir située de l'autre côté du clapet s'effectue par un passage de raccordement (140) situé dans le clapet (14).

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