Medication injector apparatus with drive assembly that...

A - Human Necessities – 61 – M

Patent

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Details

A61M 5/315 (2006.01) A61M 5/24 (2006.01)

Patent

CA 2689020

The invention relates to a medication injector apparatus such as an injection pen. The injection pen includes a resettable, cartridge plunger drive assembly including an axially floating nut, a cartridge plunger engaging screw, and a drive clutch movable with the nut and which when rotated causes the screw to screw through the nut. The injection pen also may include an injection clicker assembly. The injection pen also may include a doseable quantity identifier. The injection pen further may include an assembly for selectively rotating a drive sleeve of the pen, which assembly has a dial that rotates out during dose setting and which translates in without rotation during dose injecting.

La présente invention concerne un appareil d'injecteur de médication, par exemple une plume d'injection, qui comprend un dispositif d'entraînement de piston plongeur du type à cartouche, avec un écrou flottant sur le plan axial, une vis d'engagement de piston plongeur à cartouche et un embrayage d'entraînement qui peut se déplacer avec l'écrou et qui, lorsqu'il tourne, enfonce la vis dans l'écrou. La plume d'injection peut aussi comprendre un ensemble de contrôle d'injection. Elle peut également comprendre un indicateur de quantité dosable. La plume d'injection peut enfin comprendre un dispositif de rotation sélective d'un manchon d'entraînement, le dispositif comportant un indicateur qui pivote vers l'extérieur lors du réglage de la dose et qui s'enfonce à l'intérieur sans rotation lors de l'injection de la dose.

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