| 摘要 |
The present invention concerns a unitary flexible barrier for use in a plural-zoned, valved pressure container wherein the barrier has a shaped spatial form having sufficient rigidity to maintain its shape prior to insertion into and use in a plural-zoned, valved pressure container. The barrier comprises a flexible wall portion having an outer wall segment and an inner wall segment connected by an angled fold, the free terminal end of the outer wall segment forming a seal and the terminus of the inner wall segment distal to the fold extending into a central piston region that closes the barrier, and further wherein the outer wall segment is steeply frusto-conical in shape and terminates at its free end in a seal, and the inner wall segment is disposed in juxtaposed relation to the inner surface of the outer wall and in steeply frustoconical shape opposite to the frusto-conical shape of the outer wall segment so as to form a small acute angle between the outer wall segment and the inner wall segment; the terminus of the inner wall segment distal to the fold being closed by a central piston region to thereby complete the unitary barrier member.
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