Hydraulic control apparatus
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United States of America Patent
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Jan 26, 2010
Grant Date -
Mar 6, 2008
app pub date -
Aug 20, 2007
filing date -
Aug 21, 2006
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A hydraulic control apparatus for a single action cylinder includes a switch valve for supplying fluid to and draining fluid from the cylinder, a cylinder side passage connected to the cylinder, a switch valve side passage connected to the switch valve, and a valve body accommodation chamber. The valve body accommodation chamber linearly extends between the cylinder side passage and the switch valve side passage. An on-off valve is located in a vicinity of a first end of the valve body accommodation chamber. The on-off valve defines a first back pressure chamber. A flow control valve is located in a vicinity of a second end that is opposite to the first end. The flow control valve defines a second back pressure chamber. The on-off valve and the flow control valve are separated from each other by a partitioning member.
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