Title:
HYDRAULIC VALVE APPARATUS
Document Type and Number:
WIPO Patent Application WO/2024/009619
Kind Code:
A1
Abstract:
In order to improve the straight advancing ability of a work machine provided with two traveling hydraulic devices, a hydraulic valve apparatus 1 is interposed between the hydraulic devices and a hydraulic pump, and carries out supply control of oil from the hydraulic pump to the hydraulic devices by operating spools provided in a valve body 20. The valve body 20 is provided with: individual traveling spools 34 that are provided to correspond to two traveling hydraulic motors 7; cylinder spools 33 that are provided to correspond to hydraulic cylinders 11, 12; and two pump oil paths 21A, 21B that are connected through pump ports 22A, 22B to the hydraulic pump. The two traveling spools 34 are connected to the individual pump oil paths 21A, 21B without passage through the respective other spools 33, 35 at positions where distances from the pump ports 22A, 22B are equal to each other.
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Inventors:
HISHINUMA YUICHI (JP)
MIYAMOTO YUUSUKE (JP)
MIYAMOTO YUUSUKE (JP)
Application Number:
PCT/JP2023/018336
Publication Date:
January 11, 2024
Filing Date:
May 16, 2023
Export Citation:
Assignee:
KOMATSU MFG CO LTD (JP)
International Classes:
F15B11/00; E02F9/20; F15B11/17
Domestic Patent References:
| WO2022210662A1 | 2022-10-06 |
Foreign References:
| JPS6294158U | 1987-06-16 | |||
| JP2009041711A | 2009-02-26 | |||
| JP2002181008A | 2002-06-26 | |||
| JPH0643301U | 1994-06-07 | |||
| JP2571231Y2 | 1998-05-18 | |||
| JP2019183972A | 2019-10-24 | |||
| JP2021038792A | 2021-03-11 | |||
| JP2019002451A | 2019-01-10 | |||
| JP2018016977A | 2018-02-01 | |||
| JP2021156399A | 2021-10-07 | |||
| JP2004197825A | 2004-07-15 | |||
| JPH03140678A | 1991-06-14 | |||
| JP2003113809A | 2003-04-18 |
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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