Portable oxygen delivery device

1. An oxygen delivery device comprising:

an oxygen delivery module configured to receive compressed air from a compressor comprising a piston having a single rotor configured to orbit around first eccentric on a shaft to compress ambient air into the compressed air, the oxygen deliver module comprising a rotary valve assembly that rotates with respect to a plurality of adsorption beds to selectively transfer fluids through the plurality of adsorption beds in order to separate concentrated oxygen and other gases within the compressed air, the compressor configured to be combined with a vacuum pump comprising another piston having a single rotor configured to orbit around a second eccentric on the shaft to vacuum out the other gases, the compressor and the vacuum being separated by an endplate that excludes one or more motors driving the compressor and the vacuum pump, the endplate overlaying and being adjacent to a stator of the compressor and a stator of the vacuum pump, wherein the endplate completely separates a first housing containing the first stator and a second housing containing the second stator, wherein the stator of the compressor, the stator of the vacuum pump, and the endplate all have the same height measured along a dimension perpendicular to a long axis of the shaft, and wherein the endplate includes a only a single vent hole that extends through the endplate and communicates with ambient pressure, the vent hole being positioned entirely within the endplate and having (1) a first end that communicates solely with an endplate chamber entirely defined by the endplate and entirely contained within the endplate (2) a second end that communicates with the ambient pressure, wherein the vent hole is straight along its entire length and extends radially outward from the endplate chamber to a radial end of the endplate and provides a sole passageway for fluid to vent out of the endplate chamber through the endplate and to atmosphere, and wherein the endplate chamber fluidly communicates with both the compressor and the vacuum such that gas can leak from the compressor or the vacuum into the endplate chamber, wherein the vent hole vents the gas that leaks into the endplate chamber to atmosphere;

at least one sensor to detect patient breathing; and

a controller configured to control the oxygen delivery module to cause the oxygen delivery module to deliver the concentrated oxygen to the patient based on data from the at least one sensor such that in response to a determination, based on data from the at least one sensor, that no breathing is detected for a first pre-determined period of time, the controller causes the oxygen delivery module to deliver the concentrated oxygen to the patient in continuous flow mode, and in response to a determination, based on additional data from the at least one sensor, that breathing is detected for a second period of time, the controller causes the oxygen delivery module to deliver the concentrated oxygen to the patient in a pulse flow mode.

2. The oxygen delivery device of claim 1 , wherein the at least one sensor is configured to detect patient breathing by performing one of: continuous detection of patient breathing, and periodic detection of patient breathing,

wherein the compressor and the vacuum are enclosed within a single housing.

3. The oxygen delivery device of claim 1 , wherein the controller is further configured, subsequent to the determination that no breathing is detected and to causing the oxygen delivery module to deliver the concentrated oxygen to the patient in the continuous flow mode, to:

terminate the continuous flow delivery of the concentrated oxygen to the patient, and

cause the oxygen delivery module to deliver the concentrated oxygen to the patient in the pulse dose mode in response to one or more of:

(a) a determination that the second period of time has elapsed since the determination that no breathing is detected, and

(b) the determination, based on the additional data from the at least one sensor, that the patient is breathing.

4. The oxygen delivery device of claim 1 , wherein the at least one sensor includes a pressure sensor fluidly connected to a cannula coupled to the oxygen delivery module, the cannula structured to deliver the concentrated oxygen from the oxygen delivery module through the patient's nasal passages.

5. The oxygen delivery device of claim 4 , wherein the pressure sensor fluidly connected to the cannula is configured to detect pressure changes within the patient's nasal passages, and to generate data representative of the pressure changes.

6. The oxygen delivery device of claim 5 , wherein the controller is further configured to:

receive a feed of the data generated by the pressure sensor;

perform filtering operation on the feed of the data generated by the pressure sensor to determine onset of an inspiratory cycle for the patient.

7. The oxygen delivery device of claim 1 , wherein the oxygen delivery module comprises one or more of: a pressure swing adsorption system, a vacuum-pressure swing adsorption system, a vacuum swing adsorption system, and a membrane separation device.