Surgery – Respiratory method or device – Draw-type snorkel
Patent
1998-11-09
2000-07-11
Lewis, Aaron J.
Surgery
Respiratory method or device
Draw-type snorkel
12820127, 12820128, B63C 1116
Patent
active
060857447
ABSTRACT:
A dual channel snorkel promotes cleaner air by substantially separating fresh air from used air. An upper valve comprises a pair of flexible material flaps which nominally permit flow only in opposite directions through the respective channels. However, when necessary for purging water, a strong exhalation will open both flaps upwardly to permit removal of water from both channels. The illustrated embodiment also comprises a lower valve and a splash guard.
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patent: 4655212 (1987-04-01), Delphia
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patent: 5267556 (1993-12-01), Feng
patent: 5280785 (1994-01-01), Fujima
patent: 5404872 (1995-04-01), Choi
patent: 5664558 (1997-09-01), Wagner
Hermansen Frank
Winefordner Carl
Wintner Robert
Lewis Aaron J.
Mitchell Teena
Tachner Leonard
Water Sports Distributing Inc.
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