| 摘要 |
PURPOSE:To make a floating bag not only satisfactorily flexible but also heat proof and of a high level strength to bear the inner and outer pressure, by composing the floating bag expanded with a high temperature gas with an inside bag of heatproof material and an outside bag of extremely strong material. CONSTITUTION:When a powder 1 is ignited, a burned high temperature gas flows from an expansion chamber 2b into a floating bag 3 through a flowing hole 2c. Consequently, the floating bag 3 is expanded, casing doors 5a to 5d to be dropped down to expand the bag further, and the submerged body is surfaced. While expanding, the high temperature gas contacts the inner bag 3c without giving a burning damage, because of its heatproof material. Although the outer bag 3b is heated by the heat penetrating through the inner bag 3c, the temperature will not rise too much because of the heat resistance of the interface between the both bags and the water contacting to the outer bag. Therefore, with a less heatproof performance, the strong material of the outer bag satisfys the required overall strength of the floating bag. Thus, by using materials to respond to the respective requirements, flexibility, heatresistance, and strength can be satisfied.
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