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Patent Searching and Data


Title:
VALVE DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/008736
Kind Code:
A1
Abstract:
In a valve device (100), a travel control valve unit (130) has a communication passage for connecting the delivery passages (123) of left and right travel control valve units (130), and a spool (170) has a delivery-side land section (172) for allowing or blocking communication between the delivery passage (123) and the communication passage; a discharge-side land section (173) for allowing or blocking communication between an actuator passage (125) and a discharge passage (129); a discharge section (192B) which is provided at the delivery-side land section (172) and which, in a movement initial stage of the spool (170), discharges, to the discharge passage (129), part of operating fluid conducted from a supply passage to the delivery passage (123); and a communication section (192A) which is provided at the delivery-side land section (172) and which, in a movement final stage of the spool (170), connects the delivery passage (123) and the communication passage.

Inventors:
MATSUURA AKIO (JP)
Application Number:
PCT/JP2019/019363
Publication Date:
January 09, 2020
Filing Date:
May 15, 2019
Export Citation:
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Assignee:
KYB CORP (JP)
International Classes:
F15B11/22; E02F9/02; E02F9/22
Foreign References:
JP2006336731A2006-12-14
JP2010151189A2010-07-08
JP2006082767A2006-03-30
JP2018129127A2018-08-16
Other References:
See also references of EP 3677795A4
Attorney, Agent or Firm:
GOTOH & PARTNERS (JP)
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