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Needle protection device intended for a carpule and injection device comprising a carpule and this protection device

  • US 20050119623A1
  • Filed: 11/23/2004
  • Published: 06/02/2005
  • Est. Priority Date: 11/24/2003
  • Status: Active Grant
First Claim
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1. Auxiliary device for protecting a needle comprising:

  • a protector support which delimits a chamber for receiving a reservoir of fluid to be injected, which reservoir is provided with a piston and which support is provided with means for being fixedly joined to the reservoir;

    a needle protector which can be moved relative to the protector support between a retracted position and a deployed position for protecting the needle;

    characterised in that it comprises the needle, which needle is carried by the protector support in the axis of the chamber and has an injection end which protrudes from the chamber and a perforation end which protrudes into the chamber, and in that the joining means comprise hooks which protrude in the chamber and which delimit, around the needle, a cage for resiliently latching around the neck of a carpule which forms the reservoir, and in that it comprises a spring which is interposed between the protector support and the needle protector, which spring is initially compressed and can urge the needle protector towards the deployed position thereof, and in that the protector support comprises, at the end thereof for introducing the carpule into the chamber, a collar for supporting the spring.

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