Improvements in and relating to a medicament delivery devices

Details Improvements in and relating to a medicament delivery devices Improvements in and relating to a medicament delivery devices

A - Human Necessities

61

M

A61M 5/145 (2006.01)

Patent

CA 2757136

A medicament delivery device (1) comprises a housing (2) for holding a medicament cartridge (9), a drive (18, 32) and a drive control means (46, 52). The medicament cartridge (9) has a medicament outlet and a bung (20) able to be driven via a piston rod (12, 14) driven by the drive force of the drive (18, 32) and controlled by the drive control means (46, 52). Additionally, the medicament delivery device (1) comprises a restraining means (38) for applying a restraining force to the piston rod (12, 14), in a direction opposite to the drive force. By varying the restraining force by the drive control means (46, 52) the movement of the bung (20) along the medicament cartridge can be controlled.

Un dispositif d'administration de médicament (1) comprend un boîtier (2) contenant une cartouche de médicament (9), un entraînement (18, 32) et un moyen de commande d'entraînement (46, 52). La cartouche de médicament (9) comprend une sortie de médicament et un bouchon (20) pouvant être déplacé par une tige de piston (12, 14) elle-même déplacée par la force d'entraînement de l'entraînement (18, 32) et commandée par le moyen de commande d'entraînement (46, 52). De plus, le dispositif d'administration de médicament (1) comporte un moyen de limitation (38) permettant de limiter la force exercée sur la tige de piston (12, 14) dans une direction opposée à la force d'entraînement. En modulant la force de limitation à l'aide du moyen de commande d'entraînement (46, 52), il est possible d'agir sur le mouvement du bouchon (20) le long de la cartouche de médicament.

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