Fresh air swimming snorkel

Surgery – Respiratory method or device – Draw-type snorkel

Reexamination Certificate

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Details

C128S201270

Reexamination Certificate

active

07047965

ABSTRACT:
A front-mounted swimming snorkel with separate air intake and exhaust tubes controlled by one-way valves to prevent re-breathing exhaled air, wherein the exhaust tube cross-sectional area is selected to regulate the amount of force needed to open the water purge valve so that a swimmer can open the purge valve by exhaling with more force than normal.

REFERENCES:
patent: 2753865 (1956-07-01), Van der Kogel
patent: 3860042 (1975-01-01), Green
patent: 5117817 (1992-06-01), Lin
patent: 5664558 (1997-09-01), Wagner
patent: 5697362 (1997-12-01), Albrecht
patent: D406333 (1999-03-01), Garraffa
patent: 6085744 (2000-07-01), Hermansen et al.
patent: 6302102 (2001-10-01), Giroux et al.
patent: 6318363 (2001-11-01), Monnich

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