Single-use syringe

Details Single-use syringe Single-use syringe

A - Human Necessities

61

M

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

Patent

CA 2454586

A single-use syringe includes a shield (2), a barrel (1) mounted for axial movement within the shield and being biased to a rearward position by resilient biasing means (10), and a plunger assembly (3) mounted for axial movement within the barrel. A resilient locking member (6) initially prevents the barrel from moving rearwardly. When fluid is expressed from the barrel, the barrel moves forward thereby disabling rearward movement prevention means (15) and enabling forward movement prevention means (14) such that the barrel can move rearwardly and is locked in the rearward position to prevent repeated use.

L'invention concerne une seringue à usage unique qui comprend un cache (2), un cylindre (1) monté pour assurer un mouvement axial à l'intérieur du cache et incliné vers une position arrière par un dispositif d'inclinaison élastique (10), et un ensemble piston (3) monté pour assurer un mouvement axial à l'intérieur du cylindre. Un élément de verrouillage élastique (6) empêche au départ le cylindre de reculer. Lorsqu'un fluide est exprimé du cylindre, ce dernier avance pour désactiver un moyen de prévention de mouvement vers l'arrière (15) et activer un moyen de prévention de mouvement vers l'avant (14) de sorte que le cylindre puisse reculer et se verrouiller dans la position arrière pour empêcher un usage répété.

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