Surgery – Respiratory method or device – Draw-type snorkel
Patent
1987-10-13
1989-11-14
Hindenburg, Max
Surgery
Respiratory method or device
Draw-type snorkel
12820127, B63C 1116
Patent
active
048799955
ABSTRACT:
The improved snorkel includes a conduit whose length is divided by a bell shaped chamber. A chamber purge valve is located above the water surface when the snorkel is in the approximate position of use by a skin diver swimming face down on the water surface. The chamber purge valve drains the chamber and upper conduit of water when the skin diver returns to the surface after swimming or diving underwater. After a purging exhalation, or after splashing into the open end of the upper conduit due to swimming movements or wave action or the like, the forces of molecular cohesion and adhesion cause water to flow down the inside surface of the upper conduit and chamber to the chamber purge valve. The purge valve opens under slight hydrostatic pressure and drains the water to ambient at a rate sufficient to prevent overflow into the lower conduit. In an alternate configuration, drainage is facilitated by another purge valve located at the bottom of a second chamber below the mouthpiece. The second chamber also serves to capture water which drains through the mouthpiece of which overflows from the upper conduit.
REFERENCES:
patent: 1197115 (1916-09-01), Fell
patent: 2317236 (1943-04-01), Wilen et al.
patent: 2753865 (1956-07-01), Van Der Kogel
patent: 2814292 (1957-11-01), Girden
patent: 4071924 (1978-01-01), Blanc
patent: 4278080 (1981-07-01), Schuch
patent: 4655212 (1987-04-01), Delphia
Hindenburg Max
Lacyk John P.
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