Double-tube 'Snorkel' for aquatic sports, submerged activities, etc. e.g. swimming and riding on submersible

摘要

The double-tube (1) comprises a mouth-piece (2) connected through non-return valves (4,5) to the entry/exit of air mechanism (15). This comprises an inhalation tube (12) and the exhalation tube (11). Both tubes are formed by a divider (9) in the main tube. The air flows from the inhalation tube to the mouth-piece through a conduit (8). An anti-return mechanism (5) is associated to a second conduit (7) connecting it to the exhalation tube. For convenience of the swimmer, the main tube has a flexible section (10), allowing it to bend.