HERMETICALLY SEALED PRESSURE BALANCED ACCUMULATOR

摘要

A hermetically sealed pressure-balanced accumulator includes a housing (12) and a moveable divider mechanism (14) for separating the housing into at least an accumulator chamber (16) at a pre-selected accumulator pressure. A first balancing chamber (18) is responsive to changes in ambient pressure for adjusting the pre-selected accumulator pressure with respect to ambient pressure. A second balancing chamber (20) is responsive to the first balancing chamber, and the first and second balancing chambers maintain a predetermined pressure differential between the pre-selected accumulator pressure and ambient pressure. The hermetically sealed pressure-balanced accumulator further includes a hermetic sealing device (22) for sealing the first balancing chamber from at least one of the accumulator chamber and the second balancing chamber.