Metered fluid source connection to downstream functions in PCLS systems
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United States of America Patent
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Sep 5, 2017
Grant Date -
Mar 16, 2017
app pub date -
Sep 15, 2015
filing date -
Sep 15, 2015
priority date (Note) -
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Abstract
A hydraulic control valve assembly to be integrated into a pressure compensated load sensing system including a fluid source is provided. The hydraulic control valve assembly includes a first working unit to control a first hydraulic function of a machine. The first working unit includes a first directional and return flow control in the form of a first spool, a first function flow control to selectively communicate a working pressure of the first function to the fluid source, and a first downstream flow control. The hydraulic control valve assembly further includes a second working unit arranged downstream of the first working unit. The second working unit to control a second hydraulic function of the machine. The first downstream flow control to selectively restrict a flow a fluid from the fluid source to the second working unit.
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