Pumps – Condition responsive control of pump drive motor – By control of electric or magnetic drive motor
Patent
1990-02-02
1992-06-30
Hepperle, Stephen M.
Pumps
Condition responsive control of pump drive motor
By control of electric or magnetic drive motor
417 53, 417 63, F04B 4906
Patent
active
051258013
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 caused 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 the pulses, the pulses are counted to determine the number of pump cycles.
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Carson Douglas T.
Hulinsky Raymond
Nabity Frederick A.
Wright Paul G.
Carney Vincent L.
Hepperle Stephen M.
Isco, Inc.
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