초록 ▼

An improved oxygen concentrator includes an oxygen sensor, valve and timer for periodically directing a breathable gaseous mixture having increased oxygen concentration to the sensor. A preferred assembly includes an alarm and means for increasing oxygen concentration in the breathable gaseous mixtu

An improved oxygen concentrator includes an oxygen sensor, valve and timer for periodically directing a breathable gaseous mixture having increased oxygen concentration to the sensor. A preferred assembly includes an alarm and means for increasing oxygen concentration in the breathable gaseous mixture when the concentration falls below a selected concentration.

대표청구항 ▼

In an apparatus for increasing the oxygen concentration of a breathable gaseous mixture to be delivered to a patient, the improvement comprising an oxygen sensing assembly for sensing the concentration of oxygen in said breathable gaseous mixture comprising: a three-way valve having a first and a se

In an apparatus for increasing the oxygen concentration of a breathable gaseous mixture to be delivered to a patient, the improvement comprising an oxygen sensing assembly for sensing the concentration of oxygen in said breathable gaseous mixture comprising: a three-way valve having a first and a second gas inlet and a gas outlet, and means for selectively opening said first and second gas inlets, a first conduit connected to said first gas inlet for directing said breathable gaseous mixture having increased oxygen concentration thereto, a second conduit connected to said second gas inlet for directing atmospheric air thereto, an oxygen sensor, a third conduit connected between said gas outlet and said oxygen sensor, and a control means electrically connected to said means for alternately opening one of said first and second gas inlets and closing the other, for a selected time, and operating said oxygen sensor.