Switching valve, switching hydraulic system and crane
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United States of America Patent
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Mar 19, 2019
Grant Date -
Feb 8, 2018
app pub date -
Mar 3, 2016
filing date -
Mar 4, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
The present application relates to a switching valve, a switching hydraulic system, and a crane, in which the switching valve having an oil inlet and an oil outlet comprises at least two pairs of valve oil ports, a pair of cartridge valves provided between each pair of valve oil ports, and the oil inlet and the oil outlet are controlled such that the oil inlet and the oil outlet are capable of shifting between communications with the at least two pairs of valve oil ports. The switching valve switches on and off communication between the oil inlet and the oil outlet and the at least two pairs of valve oil ports by controlling opening or closing of the cartridge valves.
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