Face mask assembly and method having a fan and replaceable filter
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Dec 13, 1994
Grant Date -
N/A
app pub date -
Feb 26, 1992
filing date -
Feb 26, 1992
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A face mask assembly and method of use 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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Family
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Cited Art Landscape
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