DIRECTIONAL CONTROL VALVE

Title:

DIRECTIONAL CONTROL VALVE

Document Type and Number:

WIPO Patent Application WO/2018/147108

Kind Code:

A1

Abstract:

Provided is a simply structured directional control valve that change the supply flow of a hydraulic fluid. According to the present invention, a valve main body (31) has: a first branch passage (48) and a first parallel passage (46) that communicate with a first pump (51); a second branch passage (49) and a second parallel passage (47) that communicate with a second pump (52); and a bridge passage (43) that opens at a spool hole (33). The bridge passage (43) is divided into a confluence passage (45) and a connecting passage (44). When a spool (32) is in a first position, the confluence passage (45) communicates with: the first branch passage (48) and/or the first parallel passage (46); and the second branch passage (49) and/or the second parallel passage (47). When the spool (32) is in a second position, the connecting passage (44) communicates with the first branch passage (48) and/or the first parallel passage (46).

Inventors:

IWASAKI HITOSHI (JP)
ABE AKINORI (JP)

Application Number:

PCT/JP2018/002667

Publication Date:

August 16, 2018

Filing Date:

January 29, 2018

Export Citation:

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Assignee:

NABTESCO CORP (JP)

International Classes:

F15B11/02; F15B11/00; F16K11/07

Foreign References:

JP2013527399A

2013-06-27

Attorney, Agent or Firm:

NAGAI Hiroshi et al. (JP)

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