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An oxygen concentrator portable by a patient, permitting producing a flow of gas containing 50% to 95% of oxygen from air, comprising air compression device, elements for gas separation by adsorption with pressure variations, and electrical energy storage unit keeping its charge for at least 30 minu

An oxygen concentrator portable by a patient, permitting producing a flow of gas containing 50% to 95% of oxygen from air, comprising air compression device, elements for gas separation by adsorption with pressure variations, and electrical energy storage unit keeping its charge for at least 30 minutes, the concentrator having a total weight less than 10 kg. Preferably, the gas separation elements are a PSA system using a zeolite X exchanged with lithium, as the adsorbent.

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An oxygen concentrator portable by a patient, permitting producing a flow of gas containing 50% to 95% of oxygen from air, comprising air compression device, elements for gas separation by adsorption with pressure variations, and electrical energy storage unit keeping its charge for at least 30 minu

An oxygen concentrator portable by a patient, permitting producing a flow of gas containing 50% to 95% of oxygen from air, comprising air compression device, elements for gas separation by adsorption with pressure variations, and electrical energy storage unit keeping its charge for at least 30 minutes, the concentrator having a total weight less than 10 kg. Preferably, the gas separation elements are a PSA system using a zeolite X exchanged with lithium, as the adsorbent. gment including a lateral opening in the cylindrical wall for coupling nitrous oxide from said nitrous oxide supply into said first cylindrical segment. 6. The nitrous oxide fuel system as defined in claim 1, wherein said stream of nitrous oxide comprises a cylindrical shape of predetermined diameter; and wherein said fan shaped spray of fuel spreads laterally of said first direction with distance from said fuel emitting means to define a beam spread at said intersection with said stream of nitrous oxide; said beam spread is no greater in width than said predetermined diameter. 7. The nitrous oxide fuel system as defined in claim 6, wherein said stream of nitrous oxide intersects said spray of fuel at an acute angle, said acute angle comprises forty-five degrees. 8. A nozzle for a nitrous oxide system for an internal combustion engine comprising: an outlet for expressing a high velocity cylindrical stream of nitrous oxide inside the intake runner of the intake manifold of an internal combustion engine; a thin slot for expressing a fan shaped mist of fuel at an acute angle toward said high velocity stream of nitrous oxide, wherein said high velocity stream of nitrous oxide intersects and collides with said fan shaped mist of fuel to further produce a finer mist of fuel mixed with nitrous oxide. 9. A nozzle for delivering nitrous oxide and fuel into the intake runner of the intake manifold of an internal combustion engine, comprising: an elongate metal body having first and second ends; attaching means for attaching said elongate metal body to the wall of an intake runner with said second end and a portion of said elongate body positioned inside said intake runner and said first end and said remaining portion of said elongate body being positioned exterior of said intake runner; first and second passages inside said elongate body, said passages extending from respective inlets at said first end and longitudinally extending through a substantial portion of the length of said elongate body toward and terminating short of said second end; said first passage for receiving fuel from an external source, said fuel being in a liquid state; and said second passage for receiving nitrous oxide from an external source, said nitrous oxide being in a liquid state; a fuel outlet port and a nitrous oxide outlet port located on the same side of said elongate body; said fuel outlet port for emitting a spray of fuel in one direction exterior of said metal body, said spray of fuel comprising particles of fuel; and said nitrous oxide outlet port for emitting a high velocity stream of nitrous oxide in another direction exterior of said metal body to collide with said spray of fuel, wherein said particles of fuel are broken into finer particles. 10. A nozzle for supplying nitrous oxide and fuel within an intake runner of the intake manifold of an internal combustion engine, comprising: an elongate metal body including a side, a body axis and first and second ends; attachment means for attaching said elongate metal body to the wall of an intake runner with said second end and a portion of said elongate metal body positioned inside said intake runner and said first end and said remaining portion of said elongate metal body being positioned exterior of said intake runner; first and second passages in said elongate metal body, said passages extending from respective inlets at said first end and longitudinally extending through a substantial portion of the length of said elongate metal body toward d and terminating short of said second end thereof; said first passage for receiving fuel from an external source, said fuel being in a liquid state and said second passage for receiving nitrous oxide from an external source, said nitrous oxide being in a liquid state; a fuel outlet port and a nitrous oxide outlet port located at longitudinally spaced locations in said side of said metal body; said fuel outlet port having a port axis and