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Syringe Device With a Dose Limiting Mechanism and an Additional Safety Mechanism

  • US 20080234634A1
  • Filed: 07/17/2006
  • Published: 09/25/2008
  • Est. Priority Date: 07/27/2005
  • Status: Active Grant
First Claim
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1. A syringe device for ejecting a dose of a medicament, the syringe device comprising:

  • a housing;

    a dose ejecting mechanism comprising;

    a dose setting member being rotatable in relation to the housing so as to set a dose to be ejected,a piston rod arranged with respect to the housing such that translational movement of the piston rod in a distal direction causes the dose to be ejected,means for transforming translational movement of the dose setting member into translational movement of the piston rod;

    a dose limiting mechanism arranged to interact with the dose ejecting mechanism to prevent ejection of a dose exceeding the set dose; and

    a safety mechanism, which is arranged such with respect to the dose ejecting mechanism that, if the dose limiting mechanism fails, the safety mechanism prevents ejection of a dose exceeding the set dose.

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