Single-use needle-less hypodermic jet injection apparatus and method
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United States of America Patent
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Jun 14, 2011
Grant Date -
N/A
app pub date -
Jul 24, 2003
filing date -
Nov 18, 1998
priority date (Note) -
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Abstract
A gas-powered, single-use, needle-less hypodermic jet injection device includes a hand-held injector, and a drug injection cartridge which provides a cylinder of liquid medication to be injected, an injection orifice, and an injection piston. Forceful movement of the injection piston in the cylinder causes an injection jet of medication to be expelled from the injection orifice. The injection device also includes a hermetically sealed gas pressure capsule which remains sealed until the moment of injection and powers the jet injection after opening of this cartridge.
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