Retractable syringe with reduced retraction force

Details Retractable syringe with reduced retraction force Retractable syringe with reduced retraction force

A - Human Necessities

61

M

A61M 5/315 (2006.01) A61M 5/32 (2006.01) A61M 5/50 (2006.01)

Patent

CA 2437415

A tamperproof retractable non-reusable syringe has a one piece hollow outer body (12) with a barrel (14) for a slidable plunger, a transition zone and a smaller diameter nose portion (16). An elongated needle holder (22) and spring (24) combination is installable from the rear of the outer body, guided into the nose portion and held by cooperating inwardly and outwardly facing surfaces oriented in the direction of retraction at the most constricted part of the transition zone where the nose begins.

L'invention concerne une seringue protégée rétractable à usage unique, qui présente un corps extérieur monobloc creux (12) doté d'un cylindre (14) pour piston coulissant, une zone de transition et une partie nez (16) à diamètre réduit. Par l'arrière du corps extérieur, on installe un porte-aiguille allongé (22) et un ressort (24) combinés, qui sont guidés dans la partie nez et retenus par des surfaces coopérantes, tournées vers l'intérieur et vers l'extérieur et orientées dans le sens du retrait dans la partie d'étranglement de la zone de transition où commence le nez.

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