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    • 3. 发明申请
    • MEDICATION CARTRIDGE PISTON
    • 药品盒活塞
    • US20090312716A1
    • 2009-12-17
    • US12307788
    • 2007-06-27
    • Ari Tao AdlerJames J. Collins, JR.Jose Colucci, JR.Jared Alden Judson
    • Ari Tao AdlerJames J. Collins, JR.Jose Colucci, JR.Jared Alden Judson
    • A61M5/315
    • A61M5/31513A61J1/065A61M5/31515A61M2005/31516
    • A medication cartridge piston of a cartridge for an injection device. In one form, the piston includes a body (32) formed of a first material and including an interior hollow with a rearward facing mouth allowing for insertion of a drive member of the injection device. The body includes a first portion and a second portion disposed rearwared of the first portion, a sealing gland (34) secured to the body and formed of a material that is less rigid than the first material, the sealing gland ringing at least an axial segment of the second portion and having at least one exterior periphery region for sealingly engaging an interior surface of the cartridge barrel, and the body first portion including a thrust surface (4S) within the interior hollow for direct abutment by the drive member, at least a portion of the thrust surface disposed forward of a forward edge of a forwardmost sealing gland exterior periphery region of the at least one exterior periphery region. This piston can be operatively pulled by the drive member in a forward direction within the cartridge barrel to dispense medication from the cartridge. In an alternate embodiment, a piston is provided which is adapted for use with different drive members of injection devices.
    • 用于注射装置的药筒的药筒活塞。 在一种形式中,活塞包括由第一材料形成并包括具有向后的嘴的内部空腔的主体(32),其允许插入注射装置的驱动构件。 本体包括第一部分和第二部分,该第一部分和第二部分设置在第一部分的后部,密封压盖(34)固定到主体并且由比第一材料刚性小的材料形成,密封压盖至少振动至少一个轴向部分 并且具有用于密封地接合盒筒的内表面的至少一个外周边区域,并且主体第一部分包括内部空心内的推力表面(4S),用于由驱动构件直接邻接,至少一个 推力表面的一部分设置在至少一个外周边区域的最前面的密封压盖外周边区域的前边缘的前方。 该活塞可以由驱动构件在筒筒内沿向前方向可操作地拉动,以从药筒分配药物。 在替代实施例中,提供适于与注射装置的不同驱动构件一起使用的活塞。