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    • 5. 发明申请
    • Plunger for retracting needle syringe
    • 用于缩回针头的柱塞
    • US20070100293A1
    • 2007-05-03
    • US11261271
    • 2005-10-28
    • Robert CipolettiRichard GiddesKanar Rabah
    • Robert CipolettiRichard GiddesKanar Rabah
    • A61M5/315
    • A61M5/3234A61M5/3202A61M5/508A61M2005/31516
    • A plunger for a retracting needle syringe includes a hollow elongate body portion having a proximal end, a distal end, and a side wall therebetween defining a cavity. The distal end includes a distal wall having an inside surface and an outside surface. A stopper, at the distal end of the body portion, includes a peripheral portion performing a seal with the inside surface of a syringe barrel and at least one radial element extending from about a center of the outside surface of the distal wall to the peripheral portion. The distal end of the body portion includes at least one primary chamfer in the cavity at an intersection of the inside surface of the distal wall and the side wall. The chamfer is positioned under the at least one radial element for supporting the distal wall and the radial element when a hollow sleeve in the syringe barrel cuts through the end wall plunger. A secondary, smaller chamfer on each side of the primary chamfer is also provided.
    • 用于缩回针头注射器的柱塞包括具有近端,远端和其间限定空腔的侧壁的中空细长主体部分。 远端包括具有内表面和外表面的远侧壁。 在主体部分的远端处的止动件包括与注射器筒的内表面进行密封的周边部分和从远端壁的外表面的中心附近延伸到周边部分的至少一个径向元件 。 主体部分的远端在远端壁和侧壁的内表面的交叉处在空腔中包括至少一个主倒角。 当注射器筒中的中空套筒穿过端壁柱塞时,倒角位于至少一个径向元件的下方,用于支撑远侧壁和径向元件。 还提供了在主倒角的每一侧上的二次较小的倒角。
    • 6. 发明授权
    • Retracting needle syringe
    • 收回针头注射器
    • US6036674A
    • 2000-03-14
    • US216412
    • 1998-12-18
    • Richard J. CaizzaRobert Cipoletti
    • Richard J. CaizzaRobert Cipoletti
    • A61M5/32A61M5/50A61M5/00
    • A61M5/3234A61M5/3202A61M5/508
    • A retracting needle syringe includes a barrel having a chamber, an open proximal end and an open distal end. A plunger is slidably positioned in fluid-tight engagement with an inside surface of the barrel. The plunger has an elongated cavity in its distal end and a cover element sealing the cavity. A needle assembly at the distal end of the barrel includes a needle cannula having an inner hub having an open proximal end and a distal end connected to the needle cannula so that the lumen of the cannula is in fluid communication with the chamber. A flange on the inner hub is connected to a proximal end of an outer hub so that the needle cannula projects distally outwardly from a distal end of the outer hub. A spring is contained between the inner hub and the outer hub. A circular release element is movably connected to a proximal end of the flange. The release element has a distal end and a sharp proximal end projecting into the chamber, wherein distal motion of the plunger will cause the sharp proximal end to cut through the cover element and the distal end of the release element to dissociate an outer portion of the flange from an inner portion of the flange allowing the spring to expand and move the needle cannula into the cavity.
    • 缩回针头注射器包括具有腔室,开口近端和开口远端的筒体。 柱塞可滑动地定位成与筒的内表面流体密封接合。 柱塞在其远端具有细长空腔和密封空腔的盖元件。 在针筒的远端处的针组件包括针管,其具有内毂,该内套具有敞开的近端和连接到针插管的远端,使得套管的内腔与腔流体连通。 内轮毂上的凸缘连接到外毂的近端,使得针套从外毂的远端向远侧突出。 在内轮毂和外轮毂之间容纳弹簧。 圆形释放元件可移动地连接到凸缘的近端。 释放元件具有突出到腔室中的远端和尖锐的近端,其中柱塞的远端运动将使得尖锐的近端穿过覆盖元件和释放元件的远端分离出外部部分 法兰从凸缘的内部部分允许弹簧膨胀并将针管移动到腔中。
    • 9. 发明授权
    • Retracting needle syringe
    • 收回针头注射器
    • US06221052B1
    • 2001-04-24
    • US09506460
    • 2000-02-17
    • Richard J. CaizzaRobert Cipoletti
    • Richard J. CaizzaRobert Cipoletti
    • A61M500
    • A61M5/3234A61M5/3202A61M5/508
    • A retracting needle syringe includes a barrel having a chamber, an open proximal end and an open distal end including a passageway therethrough having a proximal end and a distal end. A plunger is slidably positioned in fluid-tight engagement with an inside surface of the barrel. The plunger has an elongated cavity in its distal end and a cover element sealing the cavity. A needle assembly at the distal end of the barrel includes a needle cannula and a hub having an open proximal end and a distal end connected to the needle cannula so that the lumen of the needle cannula is in fluid communication with the chamber. A flange portion of the inner hub is positioned in the proximal end of the passageway so that the needle cannula projects distally outwardly from a distal end of the passageway. A spring is contained between the hub and the distal end of the passageway. A circular release element is movably connected to a proximal end of the hub. The release element has a distal end and a sharp proximal end projecting into the chamber, wherein distal motion of the plunger will cause the sharp proximal end to cut through the cover element and the distal end of the release element to dissociate an outer portion of the flange from an inner portion of the flange allowing the spring to expand and move the needle cannula into the cavity.
    • 缩回针头注射器包括具有腔室,敞开的近端和敞开的远端的镜筒,该远端包括通过其的通道,具有近端和远端。 柱塞可滑动地定位成与筒的内表面流体密封接合。 柱塞在其远端具有细长空腔和密封空腔的盖元件。 在针筒的远端处的针组件包括针插管和具有开口近端和连接到针管的远端的毂,使得针插管的内腔与腔流体连通。 内轮毂的凸缘部分定位在通道的近端中,使得针套管从通道的远端向远侧突出。 在轮毂和通道的远端之间容纳弹簧。 圆形释放元件可移动地连接到轮毂的近端。 释放元件具有突出到腔室中的远端和尖锐的近端,其中柱塞的远端运动将使得尖锐的近端穿过覆盖元件和释放元件的远端分离出外部部分 法兰从凸缘的内部部分允许弹簧膨胀并将针管移动到腔中。