Liquid-pressure driving system
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United States of America Patent
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-
Aug 7, 2018
Grant Date -
Dec 1, 2016
app pub date -
Jan 14, 2015
filing date -
Jan 23, 2014
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A hydraulic driving system includes first to third liquid-pressure pumps and control valves. The first boom control valve is connected to the first hydraulic pump, and the second arm control valve and the first bucket control valve are connected to the second liquid-pressure pump. Further, the turning control valve and the second bucket control valve are connected to the third hydraulic pump. When a pilot pressure XAk0 is output from a bucket operating device while a turning operation is performed, a command switching device outputs a pilot pressure XAk1 to the first bucket control valve. When the pilot pressure XAk0 is output from the bucket operating device while the turning operation is performed, the command switching device outputs a pilot pressure XAk2 to a second bucket control valve.
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