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1. 发明授权

US5201709A Single use, self destructing disposable syringe 失效
标题翻译：单次使用，自毁一次性注射器
公开(公告)号：US5201709A
公开(公告)日：1993-04-13
申请号：US825790
申请日：1992-01-21
申请人： Nicholas G. Capra , Kirk G. McElney , James D. Pauls, Sr.
发明人： Nicholas G. Capra , Kirk G. McElney , James D. Pauls, Sr.
IPC分类号： A61M5/50
CPC分类号： A61M5/5066 , A61M2005/5026
摘要： A disposable hypodermic syringe which is self-destructing upon a single use has an elongate, cylindrical barrel with an adapter means on one end for attachment of a needle and an open other end. A plunger and piston carried thereby are reciprocable in the barrel. The improvement comprises releasable, interengaged flange means on the piston and plunger for holding the piston and plunger assembled together during initial retraction of the plunger and piston in the barrel but which is operative to disengage the mutually engaged flange means upon forward movement of the plunger in the barrel, whereby subsequent retraction of the plunger results in separation of the piston and plunger, rendering the syringe inoperative for subsequent reuse.
摘要翻译：一次性皮下注射器在一次使用时自毁，具有细长的圆柱形筒，其一端具有适配器装置，用于附接针和另一端。由此携带的柱塞和活塞在筒体中往复运动。改进包括在活塞和柱塞上的可释放的相互接合的凸缘装置，用于在活塞和活塞在筒中初始缩回期间将活塞和柱塞保持在一起，但是当柱塞在柱塞的向前移动时可操作以分离相互接合的凸缘装置桶，由此柱塞的后续缩回导致活塞和柱塞的分离，使注射器不起作用以供后续再利用。

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