Patent ID: 7493901

Claim:
A laryngeal-mask airway device comprising: an airway tube; an inflatable main-cuff which, when inflated, has a wider proximal region and a narrower distal region, said main-cuff comprising a relatively thin and softly pliant elastomeric material and having an inflation port connected to said proximal region; and a backplate defining a bowl having a concave laryngeal-side, and a pharyngeal-side, said backplate being bonded to a periphery of said main-cuff establishing separation between a laryngeal-chamber region and a pharyngeal region, said backplate including a tube-joint adjacent to said proximal region of said main-cuff, said tube-joint being formed on said pharyngeal-side and extending from said pharyngeal-side into said pharyngeal region, said backplate further including a passageway for communication between said pharyngeal and laryngeal-chamber regions, said backplate having a longitudinal distal rib for longitudinally supporting the distal region of said main-cuff.