Snorkel
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United States of America Patent
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-
Jan 30, 1990
Grant Date -
N/A
app pub date -
Apr 4, 1989
filing date -
Apr 7, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A snorkel device for breathing under the surface of water which will allow both inhaling and exhaling of air underwater. A multiplicity of water impermeable tubes, permeable to dissolved or gaseous oxygen, allow underwater passage of oxygen into the snorkel. Preferred tube material is porous expanded polytetrafluoroethylene.
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