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    • 6. 发明申请
    • Unidirectional Plunger Device For Syringe
    • 注射器单向柱塞装置
    • US20130023885A1
    • 2013-01-24
    • US13187978
    • 2011-07-21
    • Kevin MaddenJohn HenryAndreas Legner
    • Kevin MaddenJohn HenryAndreas Legner
    • A61B17/58B23P17/04
    • A61M5/31505A61M5/19A61M5/3137A61M5/315Y10T29/49826
    • A unidirectional plunger device for a syringe includes a base member and a ratchet mechanism. The base member is configured to attach to the proximal end of the syringe body such that the ratchet mechanism engages the plunger of the syringe. The ratchet mechanism may include a pawl configured to engage teeth on a plunger rod of the plunger. The ratchet mechanism is desirably configured to permit distal movement of the plunger while resisting proximal movement of the plunger. The unidirectional plunger device may be a retrofit that can be attached to (e.g., clipped onto) an existing syringe design. The device may be used in conjunction with a two-barrel syringe for dispensing a two-part curable composition, such as calcium phosphate bone cement or epoxy resin.
    • 用于注射器的单向柱塞装置包括基部构件和棘轮机构。 基部构件被构造成附接到注射器主体的近端,使得棘轮机构接合注射器的柱塞。 棘轮机构可以包括构造成接合柱塞的柱塞杆上的齿的棘爪。 棘轮机构理想地构造成允许柱塞的远端运动同时抵抗柱塞的近端运动。 单向柱塞装置可以是可以附接到(例如,夹在)现有注射器设计上的改装。 该装置可以与双筒注射器结合使用,用于分配两部分可固化组合物,例如磷酸钙骨水泥或环氧树脂。