| 摘要 |
The gas spring actuator (10), when attached to a valve (29), will return the valve (29) to its initial position after the valve (29) has been moved to a second position by application of a pressurized fluid that opposes the gas spring. The gas spring is charged to a predetermined gas pressure. A hydraulic fluid is applied in an opposing manner to drive the piston (26, 28) in one direction to operate the valve (29) and simultaneously pressurize the gas in the gas spring. Upon removal of the hydraulic pressure, the pressurized gas returns the piston (26, 28), and the valve (29), to its initial position. <IMAGE>
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