Surgery – Respiratory method or device – Draw-type snorkel
Patent
1990-07-23
1992-06-02
Burr, Edgar S.
Surgery
Respiratory method or device
Draw-type snorkel
12820716, B63C 1116
Patent
active
051178176
ABSTRACT:
A vertical co-axial multi-tubular diving snorkel which is characterized by the following structural design: an inner tube is disposed inside an outer tube of snorkel, these two tubes are co-axial but their calibers obviously differ from each other so as to form two separate channels; a middle thimble is provided inside the top of outer tube, a plurality of intake valve ports are provided to the top of said middle thimble, an annular flat one-way check diaphragm (referred to as the inhaling diaphragm hereinafter to only let the foreign air enter into the snorkel) is provided to the top surface of said intake valve ports; a flat one-way check diaphragm (referred to as the exhaust diaphragm hereinafter to only let the air in the snorkel be exhausted out of the snorkel), an annular body as a housing is provided to the top of snorkel and with a plurality of spaced intake holes and exhaust holes nearby the inhaling and exhaust diaphragms, an annular flat water check diaphragm (referred to as the water check diaphragm hereinafter) and a sleeve type float (referred to as the float hereinafter) are disposed in sequence below the foregoing intake valve ports on the top edge on the inner periphere of intake holes, and normally the water check diaphragm is on the bottom edge on the inner periphere of said intake holes; and based on such a structure, when the diver uses the snorkel of the present invention for breathing, he or she can avoid inhaling the waste carbon dioxide exhaled by himself or herself because there are different channels for separate intake and exhaust, and during use, when the float contacts the water, the float will be subject to the floating force of water and immediately rise up to push the water check diaphragm to close the intake valve ports so as to prevent the water from flowing into the snorkel.
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patent: 4896664 (1990-01-01), Harayama
Burr Edgar S.
Lewis Aaron J.
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