Inflatable bag with inner and intermediate containers and gas generation substances within inner container

Claim 1

An inflatable bag, comprising: a quantity of a first substance which when mixed with a quantity of a selected second substance will generate a quantity of inflating gas; a quantity of a selected second substance which when mixed with said quantity of said first substance will generate said quantity of inflating gas; an inner container being constituted by first wall means having an internal volume containing both said quantity of said first substance and said quantity of said selected second substance together with a breakable second wall means, which, while it remains unbroken, maintains said quantity of said first substance separated from said quantity of said selected second substance; and an outer container containing said inner container and being constituted by flexible third wall means defining a bag capable of having, when inflated, a substantially larger internal volume than said internal volume of said inner container; said internal volume of said inner container being insufficient to contain all of said quantity of inflating gas and said first wall means of said inner container being constructed and arranged to permit said inflating gas to escape from said inner container into said internal volume of said outer container only after said breakable second wall means has been broken and said quantity of said first substance and said quantity of said selected second substance have substantially fully contacted one another within said inner container while said inner container has remained substantially intact but for breakage of said breakable second wall means; said first and third wall means of said inner and outer containers being constructed and arranged to permit said breakable second wall means to be manually broken from externally of said outer container without rupturing said outer container and without rupturing said inner container and said first wall means of said inner container being relatively non-stretchable, so that as said quantity of inflating gas is generated in said inner container upon breakage of said breakable second wall means, at least some of said inflating gas, sufficient to inflate said internal volume of said outer container, must escape through said first wall means of said inner container into said internal volume of said outer container; and said internal volume of said outer container being sufficient to contain all of said quantity of inflating gas so as to dispose said outer container in an inflated condition; one of said first substance and selected second substance being in powder form, and the other of said first substance and selected second substance being in liquid form; said first substance being a mixture of sodium bicarbonate and an acidic agent and said second selected substance being water; a first intermediate container being constituted by fourth wall means having an internal volume containing said inner container and being contained within said internal volume of said outer container; said internal volume of said first intermediate container being insufficient to contain all of said inflating gas which escapes through said first wall means of said inner container upon contacting of said quantity of said first substance and said quantity of said selected second substance; said fourth wall means of said first intermediate container being constructed and arranged to permit said inflating gas to escape from said first intermediate container into said internal volume of said outer container only after said inflating gas has escaped from said inner container into said first intermediate container and fully inflated said internal volume of said first intermediate container; and said fourth wall means of said first intermediate container being relatively non-stretchable, so that after said inflating gas begins to escape from said inner container into said first intermediate container so as to inflate said internal volume of said first intermediate container, at least some of said inflating gas must escape through said fourth wall means of said first intermediate container into said internal volume of said outer container; and said first and fourth wall means of said inner container and of said first intermediate container are constructed and arranged to successively suddenly rupture with an audible `bang` for permitting escape of said inflating gas through the respective said first and fourth wall means.