Drive mechanisms suitable for use in drug delivery devices

Details Drive mechanisms suitable for use in drug delivery devices Drive mechanisms suitable for use in drug delivery devices

A - Human Necessities

61

M

A61M 5/315 (2006.01)

Patent

CA 2521634

The invention relates to a drive mechanism for use in a drug delivery device comprising an epicyclic gearbox. This drive mechanism can comprise a housing (2) having a helical thread; a piston rod (20) having a non-circular cross section and an external helical thread; a dose dial sleeve (30), which is threadedly engaged with said housing and being rotatable with respect to said housing; a drive sleeve (50), located between said housing and said piston rod, which is threadedly engaged with said piston rod.

L'invention concerne un mécanisme de commande destiné à être utilisé dans un dispositif pour administrer des médicaments comprenant une boîte de vitesse épicyclique. Ledit mécanisme de commande peut comprendre un logement (2) présentant un filetage hélicoïdal ; une tige de piston (20) présentant une coupe transversale non circulaire et un filetage hélicoïdal externe ; un manchon de sélection (30) de dosage, qui s'enclenche de manière filetée avec ledit logement et qui peut tourner par rapport audit logement ; un manchon de commande (50), situé entre ledit logement et ladite tige de piston, qui s'enclenche de manière filetée avec ladite tige de piston.

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