Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure
Patent
1998-10-23
2000-11-28
Dawson, Glenn K.
Surgery
Respiratory method or device
Means for supplying respiratory gas under positive pressure
12820418, A62B 902
Patent
active
061521353
ABSTRACT:
A portable mechanical ventilator uses a constant-speed compressor compressor and a recirculating bypass circuit. Bypass flow is governed by a spring-biased bypass valve so connected to both the inlet and the outlet of the main flow control valve as to maintain a differential pressure across the flow valve sufficient to operate the ventilator with minimal energy consumption. The flow valve is operated by a microprocessor in accordance with empirically derived lookup tables to both produce the desired air flow and provide a measure of that air flow.
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DeVries Douglas F.
Holmes Michael B.
Dawson Glenn K.
Pulmonetic Systems, Inc.
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