FLUID CONTROL DEVICE - SHIMADZU CORP

Title:

FLUID CONTROL DEVICE

Document Type and Number:

WIPO Patent Application WO/2017/006417

Kind Code:

A1

Abstract:

A fluid control device provided with a plurality of switching valves and a plurality of relief valves, wherein a sub-relief passage communicating with a tank when the switching valves are in any state other than neutral is branched from a parallel passage for guiding a high-pressure hydraulic fluid to the switching valves, a sub-relief valve is provided within the sub-relief passage, and a check valve that minimizes the flow of hydraulic fluid toward a hydraulic pressure supply source is provided between switching valves and the point of branching of the sub-relief passage in the parallel passage, whereby the number of components and man-hours for assembly can be reduced due to the sub-relief passage having no check valve, hydraulic fluid can be prevented from heading toward a pump from an actuator even when the plurality of switching valves are operated simultaneously, and with no need for high hydraulic fluid pressure, high-pressure hydraulic fluid is prevented from being guided to an actuator having comparatively low pressure-resistant performance.

Inventors:

KUROMUSHA JUNYA (JP)

Application Number:

PCT/JP2015/069437

Publication Date:

January 12, 2017

Filing Date:

July 06, 2015

Export Citation:

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Assignee:

SHIMADZU CORP (JP)

International Classes:

F15B11/16

Foreign References:

JP2007155109A	2007-06-21
JPH11315803A	1999-11-16
US20030115864A1	2003-06-26

Other References: