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Emergency syringe

  • US 4,314,556 A
  • Filed: 04/21/1980
  • Issued: 02/09/1982
  • Est. Priority Date: 04/21/1980
  • Status: Expired due to Term
First Claim
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1. In a hypodermic syringe of the type having a containment chamber for long term sealed storage of a liquid therein and having means for dispensing the stored liquid through a channeled needle after the containment chamber is unsealed, the combination comprising:

  • a constricted opening in said chamber forming a fluid path therein, said fluid path being in substantial proximity to said dispensing means,a stopper inside said chamber in blocking engagement with said fluid path,means for pushing said stopper further into said chamber without increasing the pressure in said chamber and for holding said stopper in fixed displacement from said fluid path thereby unsealing said chamber, andmeans for forcing said liquid through said fluid path and in to said dispensing means.

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