Fluid dispensing system
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United States of America Patent
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Sep 4, 2012
Grant Date -
Mar 31, 2011
app pub date -
Sep 28, 2009
filing date -
Sep 28, 2009
priority date (Note) -
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Abstract
A fluid dispenser is disclosed where a backoff distance is determined and implemented to prevent leakage while dispensing sequentially an accurate, precise amount of fluid substantially independent of the fluid remaining in a syringe-type dispenser. The fluid characteristics of the fluid, e.g. viscosity, surface tension, etc. affect the backoff distance that may be determined heuristically for fluid type, amount of fluid remaining in the syringe and amount to be dispensed. Once the fluid characteristics are known, the dispensing may be accomplished automatically with a processor loading new drive and backoff steps to a motor controller.
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