Fluid delivery device and method
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United States of America Patent
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Aug 11, 2020
Grant Date -
Jan 14, 2016
app pub date -
Nov 11, 2013
filing date -
Nov 9, 2012
priority date (Note) -
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Abstract
A fluid delivery injector comprises a syringe defining a barrel; a plunger and a hollow needle provided within the barrel adapted for linear movement parallel to a longitudinal axis with a distal tip of the needle contained within the syringe. A fluid retention reservoir is defined at least in the barrel and is in fluid communication with the needle when pressure is applied to the fluid in the reservoir and to the plunger for moving the needle out of the barrel. A spring may be provided for retracting the needle when pressure is released from the plunger.
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