Portable oxygen delivery device

An oxygen delivery device comprising:

• an oxygen delivery module comprising a rotatory 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 extract oxygen from compressed air, the oxygen delivery module configured to deliver a pulse including greater than 100 mL of the oxygen, the oxygen delivery module receiving the compressed air from a rotary compressor that comprises a piston having a single rotor configured to orbit around a first eccentric of a shaft to compress ambient air to generate the compressed air, one or more exhaust gases of the oxygen delivery module being drawn out by a vacuum pump that comprises another piston having a single rotor configured to orbit around a second eccentric of the shaft to vacuum out the exhaust gases, the rotary compressor and the vacuum pump being separated by an endplate chamber formed within an endplate that excludes one or more motors driving the compressor and the vacuum pump, wherein a stator of the compressor, a 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 only a single vent hole that extends through the endplate and communicates with ambient pressure, wherein the entire vent hole extends only along a linear axis that is orthogonal to an axis of rotation of the shaft and wherein the vent hole has (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 so as to provide unrestricted air flow 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;
• and
• a controller configured to control the oxygen delivery module to cause the oxygen delivery module to deliver the pulse including greater than the 100 mL of the oxygen within approximately first 60% of an inspiratory period of a patient, and wherein the controller receives data from a pressure sensor connected to a cannula through which oxygen is delivered and, based on the received data, the controller controls oxygen delivery to the patient by causing the oxygen delivery module to deliver oxygen to the patient in continuous flow mode in response to a determination, based on the received data, that no patient breathing is detected for a first pre-determined period of time and, in response to a determination, based on the received data, that breathing is detected for a second period of time, the controller causes termination of the continuous flow mode, and further causes the oxygen delivery module to deliver oxygen to the patient in a pulse flow mode.