Mask and a vent assembly therefor
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United States of America Patent
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-
May 13, 2003
Issued Date -
N/A
app pub date -
Dec 1, 1999
filing date -
Feb 10, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A mask (10) for use with a system for supplying breathable gas pressurised above atmospheric pressure to a human or animal's airways. The mask (10) includes a mask shell (12) which is, in use, in fluid communication with a gas supply conduit and a gas washout vent assembly (20). The gas washout vent assembly (20) includes at least one gas washout orifice (22) extending from a first side of the vent assembly (20) positioned, in use, adjacent the human or animal's face and a second side positioned, in use, adjacent the atmosphere. The cross-sectional area of the orifice (22) at the first side is larger than the cross-sectional area of the orifice (22) at the second side.
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Family
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