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Corrosive protected hypodermic module

  • US 4,316,463 A
  • Filed: 01/26/1981
  • Issued: 02/23/1982
  • Est. Priority Date: 01/26/1981
  • Status: Expired due to Fees
First Claim
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1. A corrosive protected hypodermic module comprising:

  • a cylindrical barrel open at its forward end,a pierceable seal across said forward end of said barrel,a piston in said barrel in slidable sealed relation to the interior wall of the barrel,said barrel, between said pierceable seal and said piston defining a medicament chamber,said piston having a longitudinal bore therein,a pierceable diaphragm across the forward end of said bore, sealing the bore from said medicament chamber,and a tissue piercing needle supported in said bore behind the pierceable diaphragm and longitudinally slidable in said bore.

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