PILOT PRESSURE CONTROL DEVICE
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United States of America Patent
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Issued Date -
Jan 23, 2025
app pub date -
Sep 1, 2022
filing date -
Sep 1, 2022
priority date (Note) -
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status (Latency Note)
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Abstract
To provide a pilot pressure control device capable of securing a pilot pressure with an inexpensive configuration. There is equipped with a controller configured, when a pump pressure drops to a predetermined pressure or below resulting from the drive of a fluid pressure actuator, to control so as to throttle an opening of a spool that is the cause of the drop in the pump pressure. The pump pressure can be maintained with an inexpensive configuration without increasing the size of an accumulator for pressure accumulation, and the pilot pressure can be secured by the pilot circuit from this pump pressure.
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