Pressure control device for heavy equipment
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United States of America Patent
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Sep 6, 2011
Grant Date -
Apr 3, 2008
app pub date -
Jun 26, 2007
filing date -
Sep 28, 2006
priority date (Note) -
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Abstract
A pressure control valve for heavy equipment. The pressure control valve can smoothly operate a working device having a high load pressure by limiting a supply of hydraulic fluid to a working device having a low load pressure in the case of simultaneously operating a plurality of working devices in a hydraulic circuit in which a plurality of control valves (e.g., a boom control valve and a bucket control valve) are connected in parallel to a single hydraulic pump.
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