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    • 1. 发明申请
    • Single Use Retractable Infusion or Transfusion Needle
    • 单次使用可伸缩输液或输血针
    • US20110071469A1
    • 2011-03-24
    • US12672275
    • 2008-05-01
    • Craig Douglas WilsonIan Patrick Berrell
    • Craig Douglas WilsonIan Patrick Berrell
    • A61M5/50
    • A61M25/0637A61M5/3257A61M25/0631A61M2005/3247
    • A needle assembly (10) has a hollow tubular housing (12) and a needle sub assembly (14) including a needle (18) slideably mounted therein. Two diametrically opposed legs (30) extend radially outwards and backwards from the needle shaft (16) and engage the rear end (42) of the housing (12) surrounding an aperture (74) through which the rear of the shaft (16) extends. The legs hold the subassembly (14) in an extended state against the action of a spring (52). Two diametrically opposed arms (70) overlie the legs (30) when the needle sub assembly (14) is extended and which may be squeezed together to compress the legs (30) inwards and allow the legs (30) to pass through the aperture (74) under the action of the spring (52) allowing the needle subassembly (14) to retract and draw the point (26) of the needle (18) into the housing (12).
    • 针组件(10)具有中空管状壳体(12)和包括可滑动地安装在其中的针(18)的针子组件(14)。 两个直径相对的腿(30)从针轴(16)径向向外和向后延伸,并且接合围绕孔(74)的壳体(12)的后端(42),轴(16)的后部延伸穿过该孔 。 腿部抵抗弹簧(52)的作用将子组件(14)保持在延伸状态。 当针子组件(14)延伸并且可以挤压在一起以将腿部(30)向内压缩并允许腿部(30)穿过孔口(20)时,两个直径相对的臂(70)覆盖腿部(30) 在弹簧(52)的作用下,允许针子组件(14)缩回并将针(18)的点(26)拉入壳体(12)中。