Gas spring actuator
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United States of America Patent
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Aug 25, 1992
Grant Date -
N/A
app pub date -
Jan 16, 1991
filing date -
Jan 16, 1991
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A gas spring actuator which, when attached to a valve, will return the valve to its initial position after the valve 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 in one direction to operate the valve and simultaneously pressurize the gas in the gas spring. Upon removal of the hydraulic pressure, the pressurized gas returns the piston, and the valve, to its initial position.
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