Load-sensing active hydraulic control device for multiple actuators
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United States of America Patent
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Sep 20, 1994
Grant Date -
N/A
app pub date -
Dec 28, 1992
filing date -
Dec 25, 1991
priority date (Note) -
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Abstract
A device for controlling multiple hydraulic actuators to protect a system from an overpressure caused by increasing the load on an individual actuator. By controlling the supply of hydraulic fluid to a pair of cylinders each associated with a pilot valve so that each cylinder always has enough fluid pressure to operate, the device of the present invention prevents the shutdown of the device caused by too much fluid going to the actuator operating at the maximum pressure. Thus all actuators continue to operate even if one is overpressured.
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