Invention Grant
US08967146B2 Respiratory mask having gas washout vent and method for making the mask 有权
具有气体冲洗孔的呼吸面罩和制造面罩的方法

Respiratory mask having gas washout vent and method for making the mask
Abstract:
A washout vent for a mask for use with a system for supplying breathable gas pressurized above atmospheric pressure to an airway of a mammal. The washout vent includes a vent orifice adapted for gas washout. The orifice includes one or more features that contribute to noise reduction, such as a channel with converging walls towards atmosphere, and/or a channel having one or more walls provided with surface treatment and/or contouring, such as roughening and/or scalloped portions.
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