Pumps – Condition responsive control of pump drive motor – With condition responsive control of pump fluid valve
Patent
1994-09-08
1995-05-16
Bertsch, Richard A.
Pumps
Condition responsive control of pump drive motor
With condition responsive control of pump fluid valve
417 441, 417 448, 604 67, 128DIG12, 318645, A61M 5142, F04B 4908
Patent
active
054155282
ABSTRACT:
A solution pumping system is disclosed which is embodied as a disposable pump cassette including a self-contained positive displacement pump, and an associated pump driver including a reciprocable pump piston for driving the pump of the cassette. This system is particularly suited for use in compounding in preparation of parenteral solutions for administration to patients. In order to promote high liquid output with minimum peak pumping pressures, the controls of the system operate to provide a "square" pumping pressure waveform, thus optimizing performance of the system. This is achieved by selectively varying the velocity of the pump piston during its operation.
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Ogden John E.
Rudzena William L.
Tripp Edward
Abbott Laboratories
Bertsch Richard A.
McAndrews, Jr. Roland G.
Trausch A. Nicholas
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