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    • 4. 发明授权
    • Single-use auto-disable syringe
    • 一次性自动禁用注射器
    • US08287491B2
    • 2012-10-16
    • US12591660
    • 2009-11-25
    • Steven BurnsRussell ColeChee L. LumDavid Martinez LlanosMichael SoltzRamon Arazo UrracaLuis Saldana
    • Steven BurnsRussell ColeChee L. LumDavid Martinez LlanosMichael SoltzRamon Arazo UrracaLuis Saldana
    • A61M5/00
    • A61M5/502A61M5/3146A61M5/3202A61M5/3213A61M2005/5026A61M2005/5033A61M2205/581A61M2205/582Y10T29/49268
    • A single-use auto-disable syringe device of reduced size utilizes a locking element to prevent re-use of the syringe by locking the plunger rod with respect to the barrel upon completion of an injection stroke. The plunger rod includes a plurality of teeth comprising distally facing shoulders provided on a majority of the length of an elongate portion of the plunger rod and a breakable section configured to break upon the application of excessive axial or torsional force. The breakable section is preferably provided at a distal end of the plunger rod so that a proximal end of the locking element engages the syringe barrel and plunger rod at a position more proximal than the breakable section. In this way, the locking element resists some of the force that would otherwise be applied to the breakable section if the plunger rod were twisted. The plunger rod also includes an intermediate tooth provided on a distal-most tooth to prevent the user from repeatedly drawing in doses too small to activate the safety mechanism.
    • 减小尺寸的一次性自动禁用注射器装置利用锁定元件来防止在注射冲程完成时通过将柱塞杆相对于枪管锁定来重新使用注射器。 柱塞杆包括多个齿,其包括设置在柱塞杆的细长部分的大部分长度上的朝向远侧的肩部,以及构造成在施加过大的轴向或扭转力时断裂的可断裂部分。 优选地,所述可断裂部分设置在所述柱塞杆的远端处,使得所述锁定元件的近端在更靠近所述可断裂部分的位置处接合所述注射器筒和柱塞杆。 以这种方式,如果柱塞杆被扭转,则锁定元件抵抗否则将施加到可断裂部分的一些力。 柱塞杆还包括设置在最远端牙齿上的中间齿,以防止使用者重复地抽取太小的剂量以致不能启动安全机构。