A displacement device for controlled dispensing of a dose of...

A - Human Necessities – 61 – M

Patent

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Details

A61M 5/315 (2006.01) A61M 5/20 (2006.01)

Patent

CA 2291341

The present invention relates to an improved displacement device (1) for controlled dispensing of a dose of a liquid contained in a cartridge (40), said displacement device (1) comprising a housing (5) incorporating: a means (6) for accommodating said cartridge (40), a manually activatable displaceable elongated dose dispensing means (20), said elongated dose dispensing means (20) having a first end part (22) extending to the exterior of the housing (5), an elongated piston rod (30) connected with a displaceable piston (32), said piston (32) being adapted to press out the liquid contained in said cartridge (40), and said elongated piston rod (30) having a plurality of transversely extending teeth (25) arranged along its length, a toothed displacing means (14), a user-operated dose setting means (8, 10, 12), said user-operated dose setting means (8, 10, 12) and said toothed displacing means (14) being operatively connected to cause movement of said toothed displacing means (14) in response to the operation of the dose setting means (8, 10, 12), pinion means (35) having a shaft (37), said pinion means (35) being rotatably secured to said elongated dose dispensing means (20), said pinion means (35) being arranged to engage the teeth of said toothed displacing means (14) and the teeth (25) of the piston rod (30).

L'invention concerne un dispositif de déplacement (1) conçu pour réguler la distribution d'une dose de liquide contenu dans une cartouche (40), ledit dispositif (1) comprenant un boîtier (5) comportant un organe (6) destiné à loger ladite cartouche (40), un organe allongé (20) de distribution de dose mobile et pouvant être actionné manuellement. Ledit organe (20) présente une première partie d'extrémité (22) se prolongeant vers l'extérieur du boîtier (5), une tige de piston allongée (30) reliée à un piston mobile (32), ledit piston (32) étant adapté pour évacuer par pression le liquide contenu dans ladite cartouche (40). Ladite tige de piston allongée (30) présente une pluralité de dents (25) s'étendant transversalement, disposées sur sa longueur, un organe de déplacement denté (14), des organes de dosage (8, 10, 12) actionnés par l'utilisateur. Lesdits organes de dosage (8, 10, 12) et ledit organe de déplacement denté (14) commandés par l'utilisateur sont reliés d'une manière actionnable afin de déplacer ledit organe de déplacement (14) en réaction à l'actionnement des organes de dosage (8, 10, 12). Un organe à pignon (35) présente un axe (37), ledit organe à pignon (35) étant fixé de manière rotative audit organe allongé (20) de distribution de dose et disposé de manière à s'engrener avec les dents dudit organe de déplacement denté (14) et avec les dents (25) de la tige de piston (30).

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