Stopper and plunger rod for a pre-filled syringe

A - Human Necessities – 61 – M

Patent

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Details

A61M 5/315 (2006.01)

Patent

CA 2689922

A plunger rod. (14) adapted for attachment with a stopper (12) for use with a syringe barrel (16) is disclosed. The plunger rod includes an elongated member (124) having a front end (126) and a back end, the plunger rod extending along a longitudinal axis. The plunger rod includes at least one deflecting arm (130) associated with' the front end of the elongated member. The deflecting arm is capable of deflecting radially inward during insertion of the plunger rod into a stopper, and deflecting outward into contact with an inner surface of the stopper after insertion to lock the plunger rod within the stopper.

L'invention porte sur une tige de piston apte à être attachée à un bouchon, qui est destinée à être utilisée dans le cylindre d'une seringue. La tige de piston, qui s'étend le long d'un axe longitudinal, comprend un organe allongé possédant une extrémité avant et une extrémité arrière. La tige de piston comprend au moins un bras déflecteur associé à l'extrémité avant de l'organe allongé. Le bras déflecteur est capable de se rabattre radialement vers l'intérieur lors de l'insertion de la tige de piston dans le bouchon, et de s'étendre vers l'extérieur jusqu'à entrer en contact avec la surface interne du bouchon après l'insertion afin de verrouiller la tige de piston à l'intérieur du bouchon.

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