Dispensing – Automatic control – Motor control
Patent
1985-12-23
1988-01-12
Rolla, Joseph J.
Dispensing
Automatic control
Motor control
222333, 604 67, 604153, B67D 508, A61M 3700
Patent
active
047185767
ABSTRACT:
A fluid infusion positive displacement pump includes a plunger driven by a stepping motor which is operated by a motor control system. The control system advances the plunger to expel liquid in a series of incremental steps at a user-set pumping rate and until a preset total dosage has been delivered with the pumping rate being determined by the waiting time between each step. In order to minimize shock to the patient, the pump is operated at a plurality of increasing fractional rates during the start of pumping and at a plurality of decreasing fractional rates at the termination of pumping with the user-set (maximum) pumping rate occurring between such fractional rate pumping periods.
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Hadley Ted A.
Kelsey Wayne R.
Tamura Paul S.
Huson Gregory L.
Katz Martin L.
Oximetrix, Inc.
Rolla Joseph J.
Roth Michael J.
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