Lever and gear force multiplier medication delivery system...

A - Human Necessities – 61 – M

Patent

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Details

A61M 5/315 (2006.01)

Patent

CA 2746153

A drug delivery device includes a cartridge (211) for storing a medicament and a needle (203) communicating with the cartridge (211) for injecting a medicament dose. A rack (241) is movably disposed in the cartridge (211) and is engageable with a stopper (213) for expelling the medicament dose from the cartridge (211). A lever assembly (231) has a lever arm (233) connected to a lever gear (230). The lever gear (232) is engaged with the rack (241) such that rotation of the lever arm (233) rotates the lever gear (232) during injection of the medicament dose, thereby moving the rack (241) and stopper (213) through the cartridge (211) to deliver the medicament dose.

L'invention concerne un dispositif d'administration de médicament comprenant une cartouche (211) destinée à recevoir un médicament et une aiguille (203) communiquant avec la cartouche (211) pour injecter une dose de médicament. Une crémaillère (241) est disposée de manière mobile dans la cartouche (211) et est en mesure d'entrer en prise avec un butoir (213) pour expulser la dose de médicament de la cartouche (211). Un ensemble levier (231) comporte un bras de levier (233) raccordé à un engrenage à levier (230). L'engrenage à levier (232) est mis en prise avec la crémaillère (241) de sorte que la rotation du bras de levier (233) fait tourner l'engrenage à levier (232) lors de l'injection de la dose de médicament, déplaçant ainsi la crémaillère (241) et le butoir (213) au travers de la cartouche (211) pour administrer la dose de médicament.

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