MASK AND VENT ASSEMBLY THEREFOR
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United States of America Patent
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app pub date -
Aug 11, 2014
filing date -
Feb 10, 1997
priority date (Note) -
Abandoned
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Abstract
A mask for use with a system for supplying breathable gas pressurised above atmospheric pressure to human or animal's airways includes a mask shell which is, in use, in fluid communication with a gas supply conduit and a gas washout vent assembly. The gas washout vent assembly includes at least one gas washout orifice extending from a first side of the vent assembly positioned, in use, adjacent to human or animal's face and a second side positioned, in use, adjacent the atmosphere. The cross-sectional area of the orifice at the first side is larger than the cross-sectional area of the orifice at the second side.
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