Portable gas delivery system

A portable gas delivery system for dispensing medical grade gas to a patient, the system comprising:

• a portable, low pressure gas container comprising an outlet, a pressurized medical grade gas up to 250 PSI, an internal liquid volume up to 1 L, an internal gas volume up to 15 L at 200-250 PSI and room temperature, and a burst pressure less than 500 PSI at room temperature;
• a low pressure regulator comprising an inlet and an outlet, and in fluid communication with the container to provide the gas at an adjustable volumetric flow rate from 0-10 L/min and having an inlet pressure up to 250 PSI at room temperature;
• and
• a two piece adapter comprising an inner portion removably coupled to and slidably engaged with an outer portion to control a flow of gas between the container and regulator, wherein the inner portion is threadingly engaged to the inlet of the regulator and the outer portion is coupled to the container;
• and
• a mask to receive at least one of the patient's mouth and nose removably coupled to the outlet of the regulator, and
• wherein the container and the regulator each have a weight less than 0.5 lbs, and
• wherein the system is in an open position when the inner portion of the adapter is in a first position and the system is in a closed position when the inner portion of the adapter is in a second position.