High precision liquid dispenser
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United States of America Patent
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Mar 29, 2016
Grant Date -
N/A
app pub date -
Jun 12, 2015
filing date -
Jun 12, 2015
priority date (Note) -
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Abstract
In one embodiment, a liquid dispenser includes a liquid reservoir, a load cell supporting at least a partial weight of the liquid reservoir, an electrically actuated valve coupled to a tube outlet exiting from a bottom of the liquid reservoir, and a processor. The processor is electrically connected to the load cell and operatively coupled to and controlling operation of the valve. Further, the processor is configured to determine a valve open time for dispensing a requested amount of liquid. The valve open time depends upon a preliminary time based on the requested amount and an output from the load cell, and an adjustment to the preliminary time based on a difference between a requested amount and a measured amount determined by the load cell for at least one previous dispense.
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