Improvements relating to automatic injection devices

A - Human Necessities – 61 – M

Patent

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A61M 5/20 (2006.01)

Patent

CA 2571571

An injection device comprises a syringe (1) extendible against a spring bias (9) from a retracted position in a housing (2) to a projecting injecting position. A spring biased plunger has collapsible elbows (10) which, when the plunger is released, initially engage the end of the syringe to drive it to the projecting position, whereupon arresting of the syringe movement causes the elbows to collapse inside the syringe to allow the plunger to engage and drive the bung (3).

L'invention concerne un dispositif d'injection qui comprend une seringue (1) pouvant s'étendre, au moyen d'un ressort (9), d'une position rétractée dans un logement (2) à une position d'injection déployée. Un piston sollicité par ressort possède des coudes pliables (10) qui, lorsque le piston est libéré, entrent en contact avec l'extrémité de la seringue afin d'entraîner celle-ci en position déployée, l'arrêt du mouvement de la seringue amenant les coudes à se plier à l'intérieur de la seringue pour permettre au piston d'entrer en contact avec un bouchon (3) et d'entraîner ce dernier.

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