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    PHARMACEUTICAL SYRINGE PISTON
    1.
    发明公开
    PHARMACEUTICAL SYRINGE PISTON 审中-公开
    活塞，药物注射器

    公开(公告)号：EP2981314A1

    公开(公告)日：2016-02-10

    申请号：EP13717392.8

    申请日：2013-04-05

    申请人： West Pharmaceutical Services, Inc.

    发明人： LAUBACH, Jeffrey, M. ,  BRINKHUES, Jurgen ,  GRUEN, Heike ,  WORMAN, Joel ,  ZHAO, Xia ,  MATTIA, Jason

    IPC分类号： A61M5/315

    CPC分类号： A61M5/31513

    摘要： A pharmaceutical syringe piston having a longitudinal axis includes a body having a central face portion with a first outer circumference and maximum first diameter. A cylindrical sealing portion proximate the central face portion has first and second axial ends and a wall extending therebetween. The wall has a second outer circumference and a second diameter essentially constant along the longitudinal axis between the first and second axial ends of the cylindrical sealing portion and is larger than the maximum first diameter. An annular curved portion has a maximum outer diameter less than the second diameter and connects the first axial end of the cylindrical sealing portion to the first outer circumference. An inert film encloses the central face portion and at least a part of the annular curved portion and has an outer boundary between the first axial end of the cylindrical sealing portion and the first outer circumference.