| 摘要 |
An accumulator is connected to a source of hydraulic fluid, comprising a movable barrier which separates the hydraulic fluid from a compartment containing two distinct energy absorbing medium-a first energy absorbing medium and a second energy absorbing medium. The movable barrier, when acted upon by an increase in pressure of the hydraulic fluid, will move in a first direction to initially contact and begin compressing the first energy absorbing medium. When the movable barrier moves further in said first direction it will contact the second energy absorbing medium and will begin compressing the second energy absorbing medium while still compressing the first energy absorbing medium.
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