Mask for adminstering an anesthetic gas to a patient
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United States of America Patent
Stats
-
May 28, 1991
Grant Date -
N/A
app pub date -
Aug 3, 1990
filing date -
Aug 3, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A mask for administering gas to a patient in which an inner cup-shaped wall fits over the nose of a patient and engages the face of the patient. An outer wall of the mask is detachably secured to and spaced from the inner wall to form an exhaust passage for the removal of gas exhaled by the patient. A floating disc valve is opened and closed by the exhaling and inhaling of the patient to control the flow of exhaust gas from the gas chamber of the inner wall to the exhaust passage. A valve seat of the floating disc valve is part of the inner wall and a flexible floating valve disc of the floating disc valve is attached to the valve seat. Formed in the peripheral edge of the inner wall is a recessed, V-shaped section to accommodate the middle of the nose and to form a seal against gas leakage.
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