Diffusion barrier in a delivery apparatus for pressurized medical liquids
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United States of America Patent
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Jun 26, 2012
Grant Date -
Sep 9, 2010
app pub date -
Jun 29, 2005
filing date -
Jun 29, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A delivery apparatus for pressurized medical liquids has a reservoir for medical liquid and a pressurizing means configured for pressurizing medical liquid to a driving pressure; with a diffusion barrier arranged to float on medical liquid in the reservoir and disposed to cover substantially the entire surface of the medical liquid in the reservoir for the purpose of preventing diffusion of gas present in the reservoir into the medical liquid.
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