Fluid transfer devices with sealing arrangement
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United States of America Patent
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Dec 17, 2013
Issued Date -
N/A
app pub date -
Oct 19, 2010
filing date -
Nov 12, 2009
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The present invention is directed toward fluid transfer devices including a vial adapter having a top wall and a cannula with a cannula tip, and an elastic O-ring like sealing element sealingly encircling the cannula and initially disposed towards the cannula tip and spaced apart from the top wall, the sealing element being brought into initial contact with the vial stopper subsequent to the cannula tip contacting the vial stopper at a puncture site and thereafter being slidingly urged towards the top wall and continuously sealing the puncture site during snap fit mounting the vial adapter on the vial.
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