Gas mask coupled to monolithic member with speech membrane
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United States of America Patent
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Sep 18, 1990
Issued Date -
N/A
app pub date -
Nov 17, 1988
filing date -
Mar 12, 1986
priority date (Note) -
Expired
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Abstract
Gas mask mainly composed of an inlet and outlet part (1) with possibly a speaking membrane (9), fastening devices (2) for securing the inlet and outlet part (1) before the mouth and nose orifices and a filter connection part (3), which is rotatable towards the inlet and outlet part.
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