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Medicament delivery devices for administration of a medicament within a prefilled syringe

DC
  • US 10,238,806 B2
  • Filed: 07/20/2015
  • Issued: 03/26/2019
  • Est. Priority Date: 01/26/2011
  • Status: Active Grant
First Claim
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1. An apparatus, comprising:

  • a cover member;

    a prefilled syringe assembly including a syringe body, an elastomeric member disposed within the syringe body, and a needle staked to a distal end portion of the syringe body, a proximal end portion of the syringe body including a flange;

    a piston member having a distal end configured to move within the syringe body between a first position and a second position to convey a dose of a medicament from the syringe body through the needle during an injection event; and

    a syringe enclosure removably disposed within the cover member, the syringe enclosure defining an internal volume within which the proximal end portion of the syringe body is disposed before and during the injection event, the medicament within the syringe body being visible through the syringe enclosure when the syringe enclosure is removed from the cover member, the cover member obstructing the view of the medicament within the syringe body when the syringe enclosure is within the cover member, a distal end of the needle extending beyond a distal end surface of the syringe enclosure before and during the injection event, a proximal end of the syringe enclosure including a first stop surface and a second stop surface, the first stop surface configured to limit distal movement of the piston member when piston member is at the second position within the syringe body, the second stop surface configured to engage the flange to limit movement of the prefilled syringe assembly within the syringe enclosure; and

    an actuator operably coupled to the piston member, movement of the actuator causing a force to be exerted on a proximal end portion of the piston member.

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