Patent 6908503 was granted and assigned to Airsep Corporation on June, 2005 by the United States Patent and Trademark Office.
A pressure swing adsorption apparatus for producing a gas mixture with a higher concentration of a particular gas such as oxygen from ambient air, in which the noisier components of the apparatus are contained in an internal removable module that is separated by sound insulation from the balance of the apparatus to attenuate structure borne vibration, reduce radiated noise, and to absorb airborne sound.