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Auto-injection device

  • US 6,203,530 B1
  • Filed: 01/28/1997
  • Issued: 03/20/2001
  • Est. Priority Date: 01/28/1997
  • Status: Expired due to Term
First Claim
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1. An auto-injection device comprising:

  • a barrel having a wall with an external surface and defining therein an internal cavity having a longitudinal axis, said barrel having a front end for placement against a patient'"'"'s skin and a rear end, said wall having a trigger access therethrough;

    a driver shiftably received in said cavity for movement between a forward, uncocked position and a rearward, cocked position and adapted to engage a syringe for longitudinally shiftable movement of the drive and syringe within said barrel, said driver including a catch positioned more proximate said rear end than said front end of said barrel;

    a release carried by said barrel, said release including a resilient member positioned within said cavity and a trigger projecting through said trigger access and biased by said resilient member to a first position on the exterior surface of the barrel adjacent said trigger access, said release being located within said cavity for retaining said catch when said driver is shifted into said cocked position, said trigger including a projection extending axially therefrom and opposing said exterior surface of said barrel and requiring shifting across said exterior surface about said axis and against said resilient member prior to depression of said trigger toward said axis and into said trigger access to shift the release out of engagement with the catch and permit movement of the driver forwardly to the uncocked position.

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