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Single-use needle-less hypodermic jet injection apparatus and method

  • US 6,783,509 B1
  • Filed: 09/13/2000
  • Issued: 08/31/2004
  • Est. Priority Date: 11/18/1998
  • Status: Expired due to Term
First Claim
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1. A needleless injector system comprising:

  • an injector body member defining an inner chamber and an injection orifice;

    a gas capsule positioned within the body member chamber, the capsule having a penetrable wall at one end thereof;

    a capsule piercing member facing and spaced from the penetrable wall;

    a hammer member disposed in abutment with and affixed to the end of the capsule remote from the penetrable wall;

    a biasing system for selectively imparting a biasing force against the hammer member and the capsule; and

    a locking system for maintaining the piercing member spaced from the penetrable wall until the hammer member and the capsule are biased toward the piercing member.

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