JPS5751005A - Composite control valve fitted with attachment valve - Google Patents
Composite control valve fitted with attachment valveInfo
- Publication number
- JPS5751005A JPS5751005A JP9304280A JP9304280A JPS5751005A JP S5751005 A JPS5751005 A JP S5751005A JP 9304280 A JP9304280 A JP 9304280A JP 9304280 A JP9304280 A JP 9304280A JP S5751005 A JPS5751005 A JP S5751005A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- attachment
- composite control
- loading
- control valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
PURPOSE: To reduce the cost by a method wherein a loading valve which controls loading and unloading is provided at the lower stream of a bypass passage of a composite control valve.
CONSTITUTION: The loading valve 51 is fitted at the lower stream of the bypass passage of the composite control valve 11. When the attachment valve 34 is in its neutral position, the loading valve 51 is opened to maintain an unloading condition. On the other hand, when the attachment valve 34 is operated, the loading valve 51 is closed by a pilot change-over valve 61 to maintain a loading condition and an actuator for an attachment is operated through the attachment valve 34. Accordingly, since the valve body of an ordinary composite control valve 11 is used in the composite control valve 11 fitted with the attachment valve 34, the cost of the composite control valve can be reduced.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9304280A JPS5948883B2 (en) | 1980-07-08 | 1980-07-08 | Composite control valve with attachment valve added |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9304280A JPS5948883B2 (en) | 1980-07-08 | 1980-07-08 | Composite control valve with attachment valve added |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5751005A true JPS5751005A (en) | 1982-03-25 |
JPS5948883B2 JPS5948883B2 (en) | 1984-11-29 |
Family
ID=14071440
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9304280A Expired JPS5948883B2 (en) | 1980-07-08 | 1980-07-08 | Composite control valve with attachment valve added |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5948883B2 (en) |
-
1980
- 1980-07-08 JP JP9304280A patent/JPS5948883B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5948883B2 (en) | 1984-11-29 |
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