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Needle assembly for a prefilled syringe system

  • US 9,358,346 B2
  • Filed: 08/31/2012
  • Issued: 06/07/2016
  • Est. Priority Date: 08/30/2005
  • Status: Active Grant
First Claim
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1. A needle assembly (10;

  • 210) for a prefilled injection syringe, comprising;

    a needle holder (12;

    212) adapted to be secured to a syringe barrel of the injection syringe and a needle (14;

    214) secured to the needle holder (12;

    212);

    a needle sheath (16;

    216) having a distal end and a proximal end, releasably connected at its distal end to the needle holder (12;

    212) to form a sterile seal, and surrounding and shielding the needle (14;

    214);

    a needle seal having a distal end and a proximal end (18;

    218), located on the needle tip and arranged at least in part in the proximal end of the needle sheath (16;

    216), said needle sheath (16;

    216) being a tubular member (32;

    232); and

    a closure element (20;

    220) that closes off the proximal end of the needle seal, said closure element (20;

    220) being a cap (56;

    256) with a cylindrical shell (60;

    260) having a distal rim (62;

    262);

    a closure connection between the closure element (20;

    220) and the needle sheath (16;

    216), configured as a permanently non-releasable and sterile barrier (54;

    254) produced by means of bonding or welding;

    whereinthe proximal end of the needle sheath (16;

    216) is provided with a ring flange (34;

    234) and the distal rim (62;

    262) of said cap shell (60;

    260) connects to said ring flange (34;

    234) of said needle sheath (16;

    216) to form the permanently non-releasable and sterile barrier (54;

    254) produced by means of bonding or welding.

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