发明名称 |
FACE MASK ASSEMBLY AND METHOD |
摘要 |
A face mask assembly having a housing and a replaceable filter mounted in said housing. A fan means draws air into a plenum chamber defined by said housing and said filter for this air to pass into a facial breathing area. An outlet check valve is provided, and a primary filter through which air passes before entering said plenum chamber.
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申请公布号 |
CA2090741(A1) |
申请公布日期 |
1993.08.27 |
申请号 |
CA19932090741 |
申请日期 |
1993.02.24 |
申请人 |
D.J.S.&T. LIMITED PARTNERSHIP |
发明人 |
STERN, DONALD J.;TRYON, JAMES A. |
分类号 |
A62B18/00;A62B18/08;(IPC1-7):A62B23/00 |
主分类号 |
A62B18/00 |
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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