Back-pressure generating fluid containment structure and method

摘要

A fluid containment structure (20) includes a containment vessel (22) having an interior vessel space (24) for fluid containment, and a fluid outlet (40) communicating with the interior vessel space. A flexible bag (30) with opposed side surfaces is disposed within the containment vessel, vented to an external atmosphere outside the containment vessel. A sacrificial bond structure (36) is formed between the side surfaces, and restrains the side surfaces together until a back-pressure within the vessel space exerts sufficient force to break the sacrificial bond structure, allowing air from the external atmosphere to enter the bag and enlarge an interior bag space.