发明名称 |
Respiratory mask having washout vent and gas washout vent assembly for a respiratory mask |
摘要 |
The present invention provides a vent assembly suitable for use with a respiratory mask of the type used in CPAP treatment. In one embodiment the vent is made of a thin air permeable membrane. Generally, the membrane is thinner than 0.5 mm. The membrane can be made of a hydrophobic material such as polytetrafluoroethylene (PTFE). The membrane can also be fabricated from expanded PTFE. The expanded PTFE membrane is mounted on a polypropylene scrim. The pores of the membrane have a reference pore size of 10 to 15 microns. In an alternative embodiment, the vent assembly includes a vent constructed from stainless steel. In another embodiment the membrane has a superficial cross-sectional area of approximately 500 mm2. In another embodiment the vent assembly comprises a membrane attached to a vent frame, the vent assembly forming an insert which can be removeably attached to a mask frame.
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申请公布号 |
US8528558(B2) |
申请公布日期 |
2013.09.10 |
申请号 |
US201113064266 |
申请日期 |
2011.03.15 |
申请人 |
DREW JOANNE ELIZABETH;VIRR ALEXANDER;CRUMBLIN GEOFFREY;RESMED LIMITED |
发明人 |
DREW JOANNE ELIZABETH;VIRR ALEXANDER;CRUMBLIN GEOFFREY |
分类号 |
A62B18/02;A61M16/06;A61M16/10 |
主分类号 |
A62B18/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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