Pumping system

Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices

Patent

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G01B 530

Patent

active

060810653

ABSTRACT:
To draw samples from a source of liquid, a pumping system measures the amount of liquid being pumped by detecting pump cycles and calculating the pumped liquid from this measurement and stored data including conduit size, pressure head and statistical data to correlate detected pump cycles with volume of liquid pumped. Pressure pulses cause by a peristaltic pump are sensed by a piezoelectric film positioned on an inlet conduit connecting the pump to the source of water and, when the liquid reaches a predetermined point determined by the nature of pulses are counted to determine the number of pump cycles.

REFERENCES:
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patent: 4216403 (1980-08-01), Krempl et al.
patent: 4304126 (1981-12-01), Yelke
patent: 4391147 (1983-07-01), Krempl et al.
patent: 4404854 (1983-09-01), Krempl et al.
patent: 4646563 (1987-03-01), Jones
patent: 4668945 (1987-05-01), Aldrorandi et al.
patent: 5125801 (1992-06-01), Nabity et al.

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