| 摘要 |
A first belt of the invention -- substantially hollow and worn about the waist -- is able to be filled with a compressed gas from a cartridge coupled with it and actuable by a pin whose placement is controlled by a pulling open of a belt buckle or by a pulling on an included lanyard. A portion of this first belt is secured in overlapping relationship so as to unfold and expand outwardly under action of the compressed gas which fills it. A second belt of the invention -- of conventionalconstruction and also worn about the waist -- underlies the first belt and is tethered to it. The end result is to increase the length of the first belt when filled with the compressed gas, thereby forming a tube riding under the armpits in holding a wearer vertically in the water -- yet still allowing him or her to be able to swim about, while the tether prevents the tube thus formed from slipping over the shoulders and head of the wearer.
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