Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure
Reexamination Certificate
2005-06-28
2005-06-28
Bennett, Henry (Department: 3743)
Surgery
Respiratory method or device
Means for supplying respiratory gas under positive pressure
C128S205240, C128S204210, C128S204180
Reexamination Certificate
active
06910482
ABSTRACT:
An on demand supplemental oxygen delivery system that is self-calibrating includes a tank containing a supply of oxygen and a nasal cannula through which the oxygen may be provided to a patient when the system solenoid valve is in the open condition. When the valve is in the closed condition, the cannula communicates with a pressure transducer via a transducer line. An orifice is formed in the line so that the pressure within the transducer line goes to atmospheric pressure when the valve is in the open condition. The pressure transducer reads the atmospheric pressure and directs it to a system controller where it is stored as a reference pressure.
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Bliss Peter L.
Davidson Willard S.
Bennett Henry
Chart Inc.
DLA Piper Rudnick Gray Cary US LLP
Patel Mital
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