发明名称 |
GASMISCHVORRICHTUNG FÜR EIN BEATMUNGSGERÄT |
摘要 |
The gas mixing apparatus provides the components of a breathing gas for mixing at approximately ambient atmospheric pressure, and regulates the pressure of a selected gas to approximately ambient atmospheric pressure for mixing with air at ambient atmospheric pressure. The gas mixing apparatus includes a piston disposed within a pump chamber. A flow limiting inlet controls introduction of a first selected gas such as oxygen for mixing with a second selected gas such as air. The pressure of the first selected gas is limited to an acceptable maximum pressure, so that even if a valve for admitting the first selected gas for mixing at ambient pressure fails, breathing gas will not be provided at an excessive pressure. A demand valve is alternatively provided for reducing the pressure of the first selected gas supplied before mixing, but a pressure sensor is also provided downstream of the demand valve for detecting failure of the demand valve, to shut off the supply of the first selected gas to prevent overpressurization. |
申请公布号 |
DE69621320(T2) |
申请公布日期 |
2002.11.21 |
申请号 |
DE1996621320T |
申请日期 |
1996.02.06 |
申请人 |
PURITAN-BENNETT CORP., PLEASANTON |
发明人 |
MERRICK, B.;GEE, N.;O'MAHONEY, JOHN;O'DEA, JOHN |
分类号 |
A61M16/00;A61M16/12;A61M16/20 |
主分类号 |
A61M16/00 |
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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