Pumps – Condition responsive control of pump drive motor – Plural pumps having separate drive motors – supply sources,...
Patent
1993-02-19
1993-11-16
Bertsch, Richard A.
Pumps
Condition responsive control of pump drive motor
Plural pumps having separate drive motors, supply sources,...
417 41, 417 46, 417 53, 417282, 417283, 417392, 210104, 210740, 210776, F04B 3500, F04B 4106
Patent
active
052617912
ABSTRACT:
Pumping apparatus for recovering a first liquid, such as a pollutant, floating on a second liquid, such as ground water. A pump immersed in the second liquid, or ground water, operates to produce a cone of depression and discharge the second liquid into a pressure vessel. A variable volume chamber inside the pressure vessel contracts and displaces any contents through an outlet conduit to a product discharge point. When the pump turns off, the variable volume chamber expands and draws product into the chamber to be driven from the chamber during successive pumping operations. Over time periodic pumping operations cause the variable volume chamber to recover the first liquid and move it to a discharge point.
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Advanced Remediation Technologies
Bertsch Richard A.
Herbster George A.
Scheuermann David W.
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