Title:
FLUID PRESSURE CONTROL DEVICE
Document Type and Number:
Japanese Patent JP2019090493
Kind Code:
A
Abstract:
To improve stability of operation of a fluid pressure control device.SOLUTION: A fluid pressure control device 100 includes: a first travel control valve 20 which controls flow of hydraulic oil supplied to/discharged from a first travel motor 1; a cylinder control valve 25 which controls flow of the hydraulic oil supplied to/discharged from a hydraulic cylinder 3; a first confluence passage 17 which guides the hydraulic oil from a third drive pump P3 to the cylinder control valve 25; and a communication valve 40 with which the confluence passage 17 is connected. A contracted part 60 which provides resistance to the passing hydraulic oil is provided at a tank passage 51 communicating with a second pilot chamber 41b of the communication valve 40.SELECTED DRAWING: Figure 1
Inventors:
MIYASHITA HIDEKI
MATSUZAKI KEIICHI
MATSUZAKI KEIICHI
Application Number:
JP2017220301A
Publication Date:
June 13, 2019
Filing Date:
November 15, 2017
Export Citation:
Assignee:
KYB YS CO LTD
KYB CORP
KYB CORP
International Classes:
F15B11/02; E02F9/22
Domestic Patent References:
| JP2013148175A | 2013-08-01 | |||
| JP2006242336A | 2006-09-14 |
Attorney, Agent or Firm:
Goto Patent Office