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US 4,896,664 AGranted
Snorkel
AssigneeJunkosha Inc.
InventorChiharu Harayama
Life of this patent
Estimating the term…
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.
Claims6
A snorkel comprising:
- (a) a mouthpiece portion, including a check valve;
- (b) a breathing tube extending outwardly from said mouthpiece portion;
- and
- (c) capping the outward end of said breathing tube a multiplicity of porous tubes which are impermeable to water but permeable to gases, said tubes being sealed at one end and gathered together at the other end of each tube to form an integral unit, said unit being inserted in or affixed to said breathing tube in an airtight manner.
1 more element
Dependencies are inferred from the claim text.