| 摘要 |
A breathing apparatus for a diver is configured to include a second stage pressure regulator and a hollow exhaust tube. An input port is located on a side of the pressure regulator and is attached to a supply hose coming from a tank mounted on a scuba diver's back. Additionally, an exhaust port is located on the same side of the regulator as the input port. The hollow exhaust tube is attached to the exhaust port. The exhaust tube is able to trap gas therein by the placement of one-way valves at each end of the exhaust tube, thus supplying a counteracting buoyant force to the same side of the regulator as the side where the supply hose enters the regulator, while defining an exhaust port arranged so that bubbles leaving the exhaust tube do not obstruct the diver's vision. The regulator may be fit with a supporting surface designed to rest on a diver's chin.
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