Surgery – Respiratory method or device – Face mask covering a breathing passage
Patent
1989-03-02
1990-11-20
Green, Randall L.
Surgery
Respiratory method or device
Face mask covering a breathing passage
12820628, A62B 1808
Patent
active
049710516
ABSTRACT:
A face mask having a perimeter for sealing against the face of a user is incorporated in a continuous positive airway pressure mask (CPAP) for treatment of central and obstructive sleep disorders. An elongate flexible pneumatic cushion seal is formed around the perimeter of the mask. An air passageway is coupled to the pneumatic air cushion. An inflatable expandable balloon chamber is coupled in open communication through the air passageway to the elongate pneumatic cushion seal. The balloon chamber is inflated to a desired pressure for passage of air between the pneumatic cushion seal and the expandable balloon chamber at said pressure. The pneumatic cushion seal is maintained against the face of a user and follows the changing contours of a user's face by passage of air between the pneumatic cushion seal and the expandable balloon chamber at the desired pressure. This changing volume of air in the pneumatic cushion seal assures that the seal is maintained. A flap ring of a flexible membrane positioned at the perimeter of the mask extends radially inwardly from the perimeter. The flexible membrane flap ring is formed with a central opening for the user to breathe in the mask. Air flowing into the mask seals the flexible membrane flap ring against the facial contours providing additional sealing for the CPAP mask.
REFERENCES:
patent: 1108122 (1914-07-01), Drager
patent: 2254854 (1941-09-01), O'Connell
patent: 3044464 (1962-07-01), Gray
patent: 4305387 (1981-12-01), Kundig et al.
patent: 4402316 (1983-09-01), Gadberry
patent: 4677977 (1987-07-01), Wilcox
Green Randall L.
Kane Daniel H.
Reichle K. M.
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