Dual chamber syringe with a dual function piston

Details Dual chamber syringe with a dual function piston Dual chamber syringe with a dual function piston

A - Human Necessities

61

M

A61M 5/28 (2006.01) A61M 5/315 (2006.01)

Patent

CA 2395902

A dual chamber syringe in which a dual function piston divides the syringe into two compartments containing powder or fluid in one compartment and fluid in the other. For mixture of the two substances, a passage is opened between the two compartments before or during retraction of the piston to force the substances to be mixed in the front compartment. During forward movement of the piston, the passage between the two compartments is closed to force the mixture of substances through the discharge opening of the syringe.

La présente invention concerne une seringue à double compartiment dans lequel un piston à double fonction divise la seringue en deux compartiments dont l'un contient une poudre ou un liquide et l'autre un liquide. Pour mélanger les deux substances, un passage s'ouvre entre les deux compartiments avant ou pendant la rétraction du piston pour amener les substances à se mélanger dans le compartiment avant. Lors du mouvement avant du piston, le passage entre les deux compartiments se ferme pour expulser le mélange de substances à travers l'ouverture de décharge de la seringue.

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