Smoke-proof mask
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United States of America Patent
Stats
-
Sep 14, 1993
Grant Date -
N/A
app pub date -
Dec 7, 1992
filing date -
Dec 7, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A smoke-proof mask having a body with an upper chamber and a lower chamber, an exhaling valve fixed on the body for exhaled air to flow out, and an oxygen chamber provided in a lower portion of the body to receive and store oxygen coming from a small oxygen tank, the oxygen in the chamber being inhaled by a mouth of a wearer to pass through small holes in the chamber to move into the lower chamber in the body and through the mouth into his lung, and exhaled air coming out of the nose of the wearer being exhausted from the upper chamber through the exhaling valve into open air.
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