Air filled waistcoat for diver - with fresh and reusable air compartments connected to breathing valve

摘要

The waistcoat is lined with two air tight containers made from flexible material and fitted with flexible breathing tubes. The tubes are connected to a mouthpiece through a combined valve and to an air expulsion tube. The air is stored in one of the containers and is breathed out into the second container. This partially spent air may be breathed a second time before final expulsion. The breathing valve allows the inhaled air to be exhaled through the outlet tube which connects with the second container. A manually operated control valve allows the air to be exhausted directly if required.