发明名称 |
BREATHING EQUIPMENT FOR AIRCREW |
摘要 |
A breathing apparatus for aircrew comprising a rigid outer shell (4) in which a flexible face-piece (3) is received whose periphery is adapted to make a seal with the pilot's face. The face-piece incorporates an inspiratory and expiratory valve and the outer shell has means (5,32) for attaching it at a fixed distance from the wearer's face. The face-piece also includes extendable means (20) a bladder (30) automatically operable to press the periphery of the face-piece (3) towards the pilot's face to improve the seal therewith when gas at a pressure above that required for normal breathing is supplied to the facemask, the extendable means reconfiguring as a result thereof. Transparent viewing means (31) are either mounted on the rigid outer shell (4) in the wearer's line of sight or can be formed as a viewing window (31) incorporated in a flexible NBC hood (30) or a full face protective helmet.
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申请公布号 |
CA2134469(C) |
申请公布日期 |
1997.10.07 |
申请号 |
CA19932134469 |
申请日期 |
1993.05.05 |
申请人 |
GRIFFITHS, JOSEPH ANTHONY |
发明人 |
GRIFFITHS, JOSEPH ANTHONY |
分类号 |
A62B18/04;A62B18/08;(IPC1-7):A62B18/08 |
主分类号 |
A62B18/04 |
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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