JPS56156503A - Multistage pressure controller of hydraulic circuit - Google Patents
Multistage pressure controller of hydraulic circuitInfo
- Publication number
- JPS56156503A JPS56156503A JP6021180A JP6021180A JPS56156503A JP S56156503 A JPS56156503 A JP S56156503A JP 6021180 A JP6021180 A JP 6021180A JP 6021180 A JP6021180 A JP 6021180A JP S56156503 A JPS56156503 A JP S56156503A
- Authority
- JP
- Japan
- Prior art keywords
- over
- signal change
- change
- valve
- circuit
- 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
- Fluid-Pressure Circuits (AREA)
Abstract
PURPOSE: To enable multistage pressure control fast in the response speed by providing a pair of electromagnetic proportion type pressure control valves through an electromagnetic direction change-over valve so as to control a vent circuit pressure of a relief valve within a hydraulic circuit.
CONSTITUTION: A relief valve 4 is provided on the discharge side of a pump 1 sending oil within a tank 2 by pressing to an actuator 3, and electromagnetic proportion type pressure control valves 6 and 7 are connected thereto through an electromagnetic direction change-over valve 5 so as to control a vent circuit 4A of the relief valve 4. Solenoids 5A and 5B on both sides of the change-over valve 5 are connected to a signal change-over device 8. The signal change-over device 8 is connected to a signal change-over device 11 via a timer 9 and an OR circuit 10. Signal change- over devices 12 and 13 are connected to the output side of the signal change-over device 11. By the outputs of these signal change-over devices 12 and 13, solenoids 6A and 7A of the valves 6 and 7 are controlled. The above signal change-over devices 12 and 13 produce a value selected from pressure values P11WP1m, and P21W P2m in accordance with the outputs of the above signal change-over devices 12 and 13.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6021180A JPS56156503A (en) | 1980-05-07 | 1980-05-07 | Multistage pressure controller of hydraulic circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6021180A JPS56156503A (en) | 1980-05-07 | 1980-05-07 | Multistage pressure controller of hydraulic circuit |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2268605A Division JPH03144101A (en) | 1990-10-05 | 1990-10-05 | Multistage pressure controlling method for hydraulic circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56156503A true JPS56156503A (en) | 1981-12-03 |
JPH037801B2 JPH037801B2 (en) | 1991-02-04 |
Family
ID=13135584
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6021180A Granted JPS56156503A (en) | 1980-05-07 | 1980-05-07 | Multistage pressure controller of hydraulic circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56156503A (en) |
-
1980
- 1980-05-07 JP JP6021180A patent/JPS56156503A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPH037801B2 (en) | 1991-02-04 |
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