Locking syringe
    1.
    发明授权
    Locking syringe 失效
    锁定注射器

    公开(公告)号:US5057078A

    公开(公告)日:1991-10-15

    申请号:US325561

    申请日:1989-03-17

    IPC分类号: A61M5/315 A61M5/48

    摘要: A syringe and method for use which may be selectively operated between a free position and a locked position. A triggering device configured with a trigger attached to the plunger of the syringe is employed. The triggering device includes a set of threads located on the plunger and a corresponding set of threads on the barrel of the syringe. Upon actuation of the trigger, the threads on the plunger are retracted from their position of engagement with the threads on the barrel, thereby placing the syringe in position for free movement of the plunger with respect to the barrel. The threads are biased in the engaged position. Thus, when the trigger is released, the threads on the plunger return to their position of engagement with the threads on the barrel. In the locked position, the plunger may be screwed into or out of the barrel by rotating the plunger, enabling the operator of the syringe to maintain strict control over the amount of pressure in the syringe. The triggering device employs a plurality of ramp and channel configurations which are disposed at approximately the same angle as the threads on the plunger and barrel. Thus, upon actuation of the triggering device, no net force results on the plunger which would cause movement of the plunger with respect to the barrel.

    摘要翻译: 可以在自由位置和锁定位置之间选择性地操作的注射器和使用方法。 采用构造为具有附接到注射器的柱塞的触发器的触发装置。 触发装置包括位于柱塞上的一组螺纹和在注射器的筒上的相应的一组螺纹。 在触发器的致动时,柱塞上的螺纹从与筒体上的螺纹接合的位置缩回,从而将注射器放置在适当位置,以使柱塞相对于筒体自由移动。 螺纹被偏置在接合位置。 因此,当触发器被释放时,柱塞上的螺纹返回到与筒体上的螺纹接合的位置。 在锁定位置,柱塞可以通过旋转柱塞而旋入或移出筒体,使得注射器的操作者能够严格控制注射器中的压力量。 触发装置采用多个斜坡和通道构造,其以与柱塞和筒体上的螺纹大致相同的角度设置。 因此,在启动触发装置时,在柱塞上不产生净力,这将引起柱塞相对于筒体的移动。