Tamper evident syringe design

Details Tamper evident syringe design Tamper evident syringe design

A - Human Necessities

61

M

A61M 5/31 (2006.01) A61M 5/315 (2006.01)

Patent

CA 2235940

A plastic prefilled syringe (10) including a syringe body (11) and a plunger assembly (12), the syringe body (11) having opposed first (13) and second (14) ends and an inner wall (16) defining a cylindrical chamber (15) which contains an injectable solution (100), the first end (13) of the syringe body (11) being sealed by a closure and the second end (14) incorporating an opening (18), the plunger assembly (12) including a plunger shaft (22) extending through said opening (18) and a stopper (24) secured at an end of said shaft (22) within said chamber, the plunger assembly (12) being movable within the chamber with the stopper (24) being operable to seal the opening (18) wherein the plunger assembly (12) includes barrier means (26 and 29) on said shaft (22) the barrier means (26 and 29) being adapted, in conjunction with a part of the syringe body (16 and 19), to inhibit access to the injectable solution (100) through the opening (18).

L'invention porte sur un seringue en plastique préremplie (10) comprenant un corps (11) et un ensemble piston (12). Une première (13) et une seconde (14) extrémité opposées du corps (11) ainsi qu'une paroi interne (16) définissent une chambre cylindrique (15) contenant une solution injectable (100), la première extrémité (13) du corps (11) de la seringue étant rendue hermétique par une fermeture et la seconde extrémité (14) étant pourvue d'un orifice (18). L'ensemble piston (12) comprend l'axe (22) du piston passant par ledit orifice (18) et un bouchon (24) fixé dans la chambre à une extrémité de l'axe (22). Cet ensemble piston (12), lequel se déplace dans la chambre, le bouchon (24) servant à fermer hermétiquement l'orifice (18), comporte, sur l'axe, des éléments d'arrêt (26 et 29). Les éléments d'arrêt (26 et 29) sont conçus pour interdire, concurremment avec une partie du corps de la seringue (16 et 19), tout accès à la solution injectable (100) par l'orifice (18).

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