Title:
CONTROL VALVE
Document Type and Number:
WIPO Patent Application WO/2019/058814
Kind Code:
A1
Abstract:
A control valve (IB) is provided with: a valve body (151) having supply passages (161a, b), load pressure passages (162a, b), and a discharge passage (163); and a spool (153). The load pressure passage (162a) has connected thereto a pressure release passage (164a) having a narrowed passage (131). The spool (153) has a land (171), a land (172), and a communication section (174) in which the pressure release passage (164a) is provided. When the communication between the load pressure passage (162a) and the load pressure passage (162b) is blocked, the communication section (174) provides communication between the load pressure passage (162a) and the discharge passage (163) through the pressure release passage (164a), and when the load pressure passage (162a) and the load pressure passage (162b) are in communication with each other, the communication section (174) blocks the communication between the load pressure passage (162a) and the discharge passage (163) through the pressure release passage (164a).
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Inventors:
MATSUURA AKIO (JP)
Application Number:
PCT/JP2018/030233
Publication Date:
March 28, 2019
Filing Date:
August 13, 2018
Export Citation:
Assignee:
KYB CORP (JP)
International Classes:
F15B11/02; E02F9/22; F15B11/00
Foreign References:
| JPH09210005A | 1997-08-12 | |||
| JPH11218102A | 1999-08-10 | |||
| JP2013079552A | 2013-05-02 | |||
| JP2014522465A | 2014-09-04 | |||
| JPH11236902A | 1999-08-31 | |||
| JPH11247803A | 1999-09-14 |
Attorney, Agent or Firm:
GOTOH & PARTNERS (JP)
Download PDF:
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