Infusion device and actuator for same

A - Human Necessities – 61 – M

Patent

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Details

A61M 5/142 (2006.01)

Patent

CA 2624793

An apparatus for delivering a fluid includes a housing (14), an inlet (22) in the housing (14) for receiving the fluid, and an outlet (24) in the housing (14) for discharging the fluid. A piston channel (38) is provided within the housing (14) through which the fluid flows from the inlet (22) to the outlet (24). An actuator (58) is positioned within the housing (14) and is moveable between a retracted position and a forward position, the actuator (58) defining a piston chamber (100) for storing fluid received through the inlet (22) when the actuator (58) is in the retracted position and for driving the fluid stored in the piston chamber (100) toward the outlet (24) when the actuator (58) transitions from the retracted position to the forward position. The actuator (58) includes an armature (60) and a piston (62) coupled to the armature (60) and moveable within the piston channel (38). The piston (62) is provided with a groove (64) in an outer surface for conducting fluid from the inlet (22) to the outlet (24).

L~invention a pour objet un appareil permettant la délivrance d~un liquide et comprenant un boîtier (14) dans lequel sont pratiqués un orifice d~entrée (22) pour la réception du liquide et un orifice de sortie (24) pour l~évacuation du liquide. Le boîtier (14) contient un canal de piston (38) par lequel le liquide s~écoule de l~orifice d~entrée (22) vers l~orifice de sortie (24). Un actionneur (58) à l~intérieur du boîtier (14) peut être déplacé d~une position de retrait vers une position d~avancement, définissant une chambre de piston (100) pour le stockage du liquide entré lorsque l~actionneur (58) se trouve en position de retrait et pour l~acheminement du liquide stocké dans la chambre de piston (100) vers l~orifice de sortie (24) lorsque l~actionneur (58) se trouve dans une position intermédiaire entre la position de retrait et la position d~avancement. L~actionneur (58) comprend une armature (60) auquel est couplé un piston (62) se déplaçant à l~intérieur du canal de piston (38). Le piston (62) présente une gorge (64) dans sa surface externe pour acheminer le liquide de l~orifice d~entrée (22) à l~orifice de sortie (24).

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