Precision dispensing of varying viscosity fluids in a prescribed mix ratio
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United States of America Patent
Stats
-
Jul 23, 1991
Grant Date -
N/A
app pub date -
Mar 31, 1989
filing date -
Mar 31, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The flow rate of fluid components, typically water and syrup, is sensed by a flowmeter that is substantially insensitive to variations in fluid pressure and/or viscosity. A feedback circuit which may be either analog or digital permits the regulation of fluid flows to be in a precisely prescribed relative proportion. This proportion may be changed by varying the amplification gain of the feedback circuit in the analog configurations, or by programming a new ratio quantity in the digital configuration of the control circuit. The digital control circuit integrates the total fluid flow, and maintains historical records of the total fluid volume and portions dispensed. The dispensed volume of any particular portion may be predetermined by manually demarking the time interval over which such volume is flowed. The historical records of dispensing activity are securely stored and may be inspected in order to compare such activity to receipts derived from sale of the dispensed beverage only by an authorized interrogation device.
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