×

PLUNGER-DRIVEN AUTO-INJECTORS

  • US 20140330216A1
  • Filed: 04/22/2014
  • Published: 11/06/2014
  • Est. Priority Date: 05/01/2013
  • Status: Active Grant
First Claim
Patent Images

12. An automatic injector comprising a housing;

  • a syringe cartridge;

    a needle assembly comprising a retractable needle;

    a plunger sub-assembly comprising a plunger outer having one or more engagement prongs, a plunger inner having one or more engagement slots and a retraction biasing member, whereby the one or more engagement prongs and the one or more engagement slots are capable of releasable engagement to retain the retraction biasing member in an initially energized state between the plunger outer and the plunger inner, wherein the plunger sub-assembly is at least partially mounted within the syringe cartridge; and

    an activation mechanism operable to facilitate sequential depression of the plunger sub-assembly to deliver one or more fluids from the syringe cartridge through the needle assembly and subsequent retraction of the plunger inner when the plunger inner is engaged with the retractable needle.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×