JPS56156503A - Multistage pressure controller of hydraulic circuit - Google Patents

Multistage pressure controller of hydraulic circuit

Info

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
Application number
JP6021180A
Other languages
Japanese (ja)
Other versions
JPH037801B2 (en
Inventor
Shigeru Fujita
Masao Hirozawa
Hideo Sakanishi
Yukitoshi Tajima
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shibaura Machine Co Ltd
Original Assignee
Toshiba Machine Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Machine Co Ltd filed Critical Toshiba Machine Co Ltd
Priority to JP6021180A priority Critical patent/JPS56156503A/en
Publication of JPS56156503A publication Critical patent/JPS56156503A/en
Publication of JPH037801B2 publication Critical patent/JPH037801B2/ja
Granted legal-status Critical Current

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
JP6021180A 1980-05-07 1980-05-07 Multistage pressure controller of hydraulic circuit Granted JPS56156503A (en)

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)

Also Published As

Publication number Publication date
JPH037801B2 (en) 1991-02-04

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