Nasal mask with balloon exhalation valve
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jun 24, 2003
Grant Date -
Jul 25, 2002
app pub date -
Oct 19, 2001
filing date -
Jun 18, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A nasal mask has a shell portion that is a hollow enclosure with a rearwardly facing opening that is defined by edge portions of the shell portion. A resiliently deformable endless interface member engages and extends around the edge portion of the opening and forms a seal between the shell portion and the user's face. The shell portion and the interface member are generally symmetrical about a median place. The shell portion has two gas inlet orifices, one on each side of the median place. The shell portion has a tubular exhalation outlet extending from the face of the mask. The mask is further provided with a balloon exhalation valve connected to the exhalation outlet for alternately venting and sealing the interior of the mask during exhalation and inhalation, respectively.
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