Fluid management system with auxiliary dispensing chamber
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United States of America Patent
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Mar 16, 1993
Issued Date -
N/A
app pub date -
Mar 22, 1991
filing date -
Mar 4, 1986
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A system that permits highly accurate flow control, even at very low flow rates, by providing a measurement chamber and an auxiliary dispensing chamber having a volume that is variable between fixed maximum and minimum limits. The maximum volume of the dispensing chamber is substantially smaller than the maximum volume of the measurement chamber used in this type of system. The dispensing chamber can then be filled to its maximum volume from the measurement chamber and thereafter caused to be reduced over time to its minimum volume. Because the maximum and minimum volumes of the dispensing chamber are known, the volume change of the dispensing chamber per unit time is determinable and is the flow rate out of the system.
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