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    • 1. 发明授权
    • Syringe with retractable needle assembly
    • 带可伸缩针头组件的注射器
    • US07494479B2
    • 2009-02-24
    • US10247781
    • 2002-09-16
    • Rudy MontalvoRaymond P. FeithSusan McConnell-MontalvoApril Marano-Ford
    • Rudy MontalvoRaymond P. FeithSusan McConnell-MontalvoApril Marano-Ford
    • A61M5/00
    • A61M5/3234A61M5/508A61M2005/3235A61M2005/3241
    • A hypodermic syringe employing a plunger slidably disposed within a barrel. The plunger has a mounting hole extending through the seal end thereof to receive a mandrel. The mandrel has a flexible flange to be releasably engaged with the plunger. A spring element withdraws the mandrel into a cavity within the plunger upon full extension of the plunger within the barrel. The barrel includes a hub retainer at the forward end thereof and a needle hub retained therein the mandrel includes barbed tines with surfaces having axes of the conical surfaces that are displaced from one another such that movement of the tines toward one another also brings the axes closer. A catch associated with the back end of the spring element coupled with the mandrel at the other end cooperates with shoulders on smooth surfaces within the cavities to retain tension within the bungee. The hub retainer and the needle hub cooperate to insure that the needle hub is constrained to limited motion such that the mandrel will fully engage the needle hub.
    • 使用可滑动地设置在筒内的柱塞的皮下注射器。 柱塞具有延伸穿过其密封端的安装孔以接收心轴。 心轴具有柔性凸缘以与柱塞可释放地接合。 弹簧元件在柱塞内的柱塞完全延伸之后将心轴抽入柱塞内的空腔中。 筒体在其前端包括轮毂保持器,并且保持在其中的针毂包括带刺的尖齿,带有具有彼此相对移位的锥形表面的轴线的表面,使得尖齿彼此相对移动使轴线更接近 。 与另一端的心轴耦合的与弹簧元件的后端相关联的卡扣与空腔内的平滑表面上的肩部配合以保持蹦极内的张力。 轮毂保持器和针座配合以确保针座被限制为有限的运动,使得心轴将完全接合针毂。