Patent 7931023 was granted and assigned to ResMed on April, 2011 by the United States Patent and Trademark Office.
A patient interface assembly adapted to be connected to a gas supply pump to deliver pressurized breathable gas to the inlet of a patient's respiratory system includes a patient interface structured to provide a seal with the patient and at least one inlet tube provided to the patient interface. Each inlet tube includes a substantially flat lower side wall to face the patient and a substantially arcuate upper side wall.