Title:
FLUID PRESSURE CONTROL DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/017719
Kind Code:
A1
Abstract:
A load holding mechanism 20 comprises: a switching valve 22 that switches the operation of an operation check valve 21; and a relief valve 41 that opens when the pressure in a load-side pressure chamber 2a reaches a predetermined pressure. The switching valve 22 comprises: a drain chamber 51 provided on the opposite side to a spring chamber 54 across a spool 56; a drain passage 76 connected to the relief valve 41 and connected to at least one of the drain chamber 51 and the spring chamber 54; a pressure conduit passage 90 that connects the drain passage 76 and the downstream side of the spool 56 to each other; and a check valve 91 which is provided to the pressure conduit passage 90 and which allows only the flow of a working fluid from the drain passage 76 to the downstream side of the spool 56.
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Inventors:
KUBO SHUNSUKE (JP)
Application Number:
PCT/JP2022/028304
Publication Date:
February 16, 2023
Filing Date:
July 21, 2022
Export Citation:
Assignee:
KYB CORP (JP)
International Classes:
F15B11/00; F15B11/08
Domestic Patent References:
| WO2017051824A1 | 2017-03-30 | |||
| WO2019182128A1 | 2019-09-26 |
Foreign References:
| JP2004084727A | 2004-03-18 | |||
| JPH0625288U | 1994-04-05 |
Attorney, Agent or Firm:
GOTOH & PARTNERS (JP)
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