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 200-250 PSI, an internal liquid volume of 0.25-1 L, an internal gas volume of 0.5-15 L at 200-250 PSI and room temperature, and a burst pressure greater than 250 PSI to 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;
• wherein the inner portion of the adapter comprises at least one tab on the outer surface thereof and the outer portion comprises at least one complimentary slot on the inner surface thereof;
• and
• wherein the at least one tab slidingly engages the at least one complimentary slot to cause gas to flow from the container when turned about 90° in a first direction.