Double pump device for mixing two or more liquids with variable relative ratios and concentrations
AssigneeConsiglio Nazionale Delle Ricerche
InventorsPaolo Papoff, Dante Guidarini, Carlo Fragale
Life of this patent
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Abstract
A double pump device for mixing with variable ratios and concentrations two or more liquids, comprising in combination: a first peristaltic pump, and a second peristaltic pump, each of said pumps acting on a plurality of collapsible tubes, said pumps being operated by two electric motors, interdependant and preferably identical to each other, driven by an electronic circuit comprising as main elements a differential amplifier and circuitry means for adjusting the input voltage of the differential amplifier and for amplifying the output signals from the differential amplifier before their application to the two driving motors.
Claims6
A double pump device for mixing with variable ratios and concentrations two or more liquids, comprising in combination:
- a first peristaltic pump, and a second peristaltic pump, each of said pumps acting on a plurality of collapsible tubes, some of said tubes having a crosssectional area different from others of said tubes, said pumps being operated by two electric motors, driven by an electronic circuit comprising as main elements a differential amplifier and circuitry means for adjusting the input voltage of the differential amplifier and for amplifying the output signals from the differential amplifier before their application to the two driving motors so that the speeds of the motors vary inversely to each other.
Dependencies are inferred from the claim text.