| 摘要 |
Hurlable, water rescue aid 10 comprising an initially collapsed, gas-inflatable buoyancy element 12, a ball-shaped bracket 24 supporting the buoyancy element in collapsed condition generally within the locus of the bracket, a compressed gas supply 32 within the bracket for inflating said element, a penetrating tip 40, adapted to release the gas supply from the cylinder in advance of hurling the aid toward a person to be rescued, and passageways 52 metering flow of released gas from the supply into the buoyancy element, whereby the buoyancy element is substantially collapsed at the commencement of flight but substantially inflated at the termination of flight for use by the person.
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