Retractable needle and syringe combination

A - Human Necessities – 61 – M

Patent

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Details

A61M 5/32 (2006.01)

Patent

CA 2242226

A combination syringe (20) and needle are disclosed wherein the needle is mounted to a retractable element which retracts into the body of the syringe plunger. The needle (12) is mounted to the retractor (30) which is spring biased (68) to retract the needle. The retraction is actuated by releasing the forward end of the retractor from engagement with a collet positioned on the forward end of the syringe inner barrel (60). The collet (66) is configured so as to clamp the forward end of the retractor, and only releases the forward end when the collet is pushed forwardly, expanded, and disengages the forward end of the needle retractor.

La présente invention concerne une combinaison d'une seringue (20) et d'une aiguille, laquelle aiguille est montée sur un élément escamotable qui s'escamote dans le corps du piston de seringue. L'aiguille (12) est montée sur l'escamoteur (30) d'aiguille qui est soumis à l'action d'un ressort (68) tendant à escamoter l'aiguille. L'escamotage est déclenché par le dégagement de l'extrémité antérieure de l'escamoteur qui était retenue par une virole garnissant l'extrémité antérieure du cylindre intérieur (60) de la seringue. Cette virole (66), qui est agencée de façon à serrer l'extrémité antérieure de l'escamoteur, ne dégage l'extrémité antérieure que lorsqu'on pousse en avant la virole qui peut ainsi se déplier et libérer l'extrémité antérieure de l'escamoteur d'aiguille.

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