Liquid dispenser having flow rate compensation

Details Liquid dispenser having flow rate compensation Liquid dispenser having flow rate compensation

1996-11-18

1998-10-20

Derakshani, Philippe

Dispensing

Processes of dispensing

222 59, 222 61, 222318, B67D 508

Patent

active

058233881

ABSTRACT:
A method and apparatus for dispensing a predetermined quantity of a liquid from a dispensing pump. A recirculation path from the dispensing pump to a bulk reservoir is configured to be substantially identical to the dispensing path itself. Periodically, a recirculation cycle is undertaken and the flow rate during the recirculation cycle is determined. With the recirculation and dispensing paths being identical, the dispensing rate for the dispensing path is then known. The method for accurately determining the recirculation rate is derived from Boyle's law to determine the specific volume dispensed in a specific recirculation cycle time.

REFERENCES:
patent: 3216622 (1965-11-01), Drostholm
patent: 4371096 (1983-02-01), Scholl et al.
patent: 5556002 (1996-09-01), Green

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