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    • 9. 发明授权
    • Nipple plunger
    • 乳头柱塞
    • US5713866A
    • 1998-02-03
    • US548762
    • 1995-10-26
    • John Glyndwr Wilmot
    • John Glyndwr Wilmot
    • A61M5/20A61M5/24A61M5/31A61M5/315
    • A61M5/2033A61M5/31511A61M2005/3132A61M2005/31516A61M5/24
    • An automatic injector comprises a housing, a tubular cartridge disposed in the housing, the cartridge having a rearward portion thereof with a predetermined inner diameter and an inwardly extending shoulder connecting a forward portion of the cartridge with a smaller inner diameter than the predetermined diameter. A charge of liquid medicament is normally disposed in the cartridge, and a needle is disposed within the housing and adapted to communicate with the medicament through a forward end of the cartridge to dispense the medicament therethrough. A plunger disposed within the cartridge and rearwardly confines the medicament and has a rearward portion with a diameter sized to form a seal with the predetermined inner diameter of the rearward portion of the cartridge. The plunger is movable forwardly through the cartridge in slidingly sealed relation with respect thereto to displace the medicament through the needle. The plunger has a forward portion thereof being of a relatively reduced diameter than the rearward portion of the plunger and shaped i) to enter the forward portion of the cartridge to displace medicament therefrom through the needle and ii) to maintain fluid communication between the forward end of the cartridge through which the needle communicates with the medicament and a space within the cartridge between the plunger and the inwardly extending shoulder of the cartridge so as to dispense medicament from the cartridge until the plunger engages the shoulder and/or the forward end of the cartridge. A releasable energy source moves the plunger forwardly through the cartridge to dispense the medicament through the needle.
    • 自动注射器包括外壳,设置在外壳中的管状墨盒,墨盒具有预定内径的向后部分,以及向内延伸的肩部,其将盒的前部与内径比预定直径缩小。 液体药物的装料通常设置在药筒中,并且针被设置在壳体内并且适于通过药筒的前端与药物连通以通过其分配药物。 设置在所述盒内并且向后限制所述药物的柱塞,并且具有直径尺寸设置成与所述盒的后部的预定内径形成密封的后部。 柱塞可以相对于其滑动密封地向前移动通过盒,以使药物通过针移动。 柱塞的前部具有比柱塞的向后部分相对减小的直径,并且成形为i)进入筒的前部,以通过针移动药物,ii)保持前端之间的流体连通 所述药筒通过所述药筒与所述药物连通,并且所述药筒内的空间在所述柱塞和所述药筒的向内延伸的肩部之间,以便从所述药筒分配药物,直到所述柱塞接合所述药筒的肩部和/或前端 墨盒。 可释放的能源将柱塞向前移动通过药筒以通过针分配药物。