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    • 3. 发明授权
    • Syringe plunger with intermediate pushing surface
    • 注射器柱塞带中间推面
    • US5460617A
    • 1995-10-24
    • US282138
    • 1994-07-28
    • Marc S. MinkusJohn S. Ziegler
    • Marc S. MinkusJohn S. Ziegler
    • A61M5/315
    • A61M5/31511A61M5/31515
    • The present invention is directed to a syringe plunger for use to administer a solution front a syringe of the type having an axially slidable piston sealing an axially extending barrel having a nozzle. The plunger includes a rigid stem member axially extending from a distal end to a proximal end. The plunger also includes threads or other attaching mechanism at the proximal end of the stem for removable attachment to the slidable piston. The stem member includes a first surface at the distal end of the stem for application of axial force to the stem so as to move the slidable piston in the barrel. Advantageously according to the invention, the stem also includes a second surface at an axially intermediate position on the stem for alternative application of axial force to the stem so as to initially move the slidable piston in the barrel, which is especially convenient for syringe users with small hands.
    • 本发明涉及一种注射器柱塞,其用于向前注射具有轴向滑动的活塞的类型的注射器,所述注射器密封具有喷嘴的轴向延伸的筒。 柱塞包括从远端轴向延伸到近端的刚性杆构件。 柱塞还包括在杆的近端处的螺纹或其它附接机构,用于可拆卸地附接到可滑动的活塞。 杆构件包括在杆的远端处的第一表面,用于向杆施加轴向力,以便将可滑动的活塞移动到枪管中。 有利地,根据本发明,杆还包括在杆上的轴向中间位置处的第二表面,用于替代地向杆施加轴向力,以便最初将可滑动活塞移动到筒中,这对于注射器用户尤其方便, 小手。