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Automatic injection device

  • US 9,345,831 B2
  • Filed: 10/18/2007
  • Issued: 05/24/2016
  • Est. Priority Date: 10/19/2006
  • Status: Active Grant
First Claim
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1. An automatic injection device for injecting a fluid into an object, said automatic injection device comprising:

  • a plunger assembly for operative engagement with a syringe adapted to contain said fluid and permit ejection of said fluid therefrom via a syringe outlet, said plunger assembly being displaceable relative to said syringe in a first direction which causes at least some of said fluid contained in said syringe to be ejected from said syringe via said syringe outlet;

    a vial adaptor engagement assembly adapted for engagement with a vial adaptor, said vial adaptor engagement assembly comprising a needle guard; and

    a user operable actuator button which, when displaced in a button displacement direction, is operable to cause displacement of said plunger assembly relative to said syringe in said first direction, said user operable actuator button being mechanically locked against displacement in said button displacement direction by said vial adaptor preventing access to said needle guard at all times that said syringe outlet is in operative engagement with said vial adaptor.

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