| 摘要 |
<p>The invention refers to a self-destructive syringe having a piston stem disengagement system, to provide a device that allows the normal suction of the liquid intended to be injected, in a manner similar to that of disposable syringes commonly used in the market. However, when the course of travel of the piston stem/plunger assembly is reversed in order to inject a liquid, the pressure is transferred to the plunger (22), causing the liquid to also apply a proportional pressure against the plunger, due to the force applied to the piston stem, causing a pressure in the liquid that is greater than the atmospheric pressure, thereupon occurring a deformation of the plunger (22), expelling the supporting pin (6) of the piston stem/plunger assembly, since the pin (6) is displaced, the supporting claws (5) lose their support and the piston stem is detached from the plunger (22) and this latter (plunger) is retained at the bottom of the barrel, rendering impossible a second suction stroke and consequently a reutiliztion (self-destruction).</p> |
