Title:
FLUID PRESSURE CONTROL DEVICE AND WORK MACHINE PROVIDED THEREWITH
Document Type and Number:
WIPO Patent Application WO/2018/193807
Kind Code:
A1
Abstract:
This fluid pressure control device (100) is provided with a supply passage (21), a discharge passage (22), actuator control valves (30, 40) which control the flow of a hydraulic oil supplied to and discharged from actuators (15, 16), a spool valve (110) which blocks flow of the hydraulic oil from the supply passage (21) to the actuator control valves (30, 40), and an unloading device (120) which is connected to the supply passage (21a) upstream of the spool valve (110) and which, by allowing hydraulic oil discharged from the pump (11) to escape into the discharge passage (22), sets the hydraulic pressure from the pump (11) to an unloaded state. When the hydraulic pressure from the pump (11) has been set to the unloaded state by the unloading device (120), the spool valve (110) blocks flow of the hydraulic oil to the control valves (30, 40).
Inventors:
ISHIBASHI KOKI (JP)
NAKAMURA MASAYUKI (JP)
TERAO TAKESHI (JP)
NAKAMURA MASAYUKI (JP)
TERAO TAKESHI (JP)
Application Number:
PCT/JP2018/013225
Publication Date:
October 25, 2018
Filing Date:
March 29, 2018
Export Citation:
Assignee:
KYB CORP (JP)
International Classes:
F15B20/00; B66F9/22; F15B11/00; F16K17/06; F16K31/122; F16K31/124
Foreign References:
| JP2007055754A | 2007-03-08 | |||
| JP2002193598A | 2002-07-10 | |||
| JP2004352466A | 2004-12-16 | |||
| JPS59992U | 1984-01-06 |
Attorney, Agent or Firm:
GOTOH & PARTNERS (JP)
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