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JPS54156985A - Safety device of hydraulic circuit having a plurality of actuators - Google Patents

Safety device of hydraulic circuit having a plurality of actuators

Info

Publication number
JPS54156985A
JPS54156985A JP6625378A JP6625378A JPS54156985A JP S54156985 A JPS54156985 A JP S54156985A JP 6625378 A JP6625378 A JP 6625378A JP 6625378 A JP6625378 A JP 6625378A JP S54156985 A JPS54156985 A JP S54156985A
Authority
JP
Japan
Prior art keywords
positively operating
actuators
oil
positively
control valves
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
JP6625378A
Other languages
Japanese (ja)
Other versions
JPS6334321B2 (en
Inventor
Hideaki Yoshimatsu
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.)
Kobe Steel Ltd
Original Assignee
Kobe Steel 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 Kobe Steel Ltd filed Critical Kobe Steel Ltd
Priority to JP6625378A priority Critical patent/JPS54156985A/en
Publication of JPS54156985A publication Critical patent/JPS54156985A/en
Publication of JPS6334321B2 publication Critical patent/JPS6334321B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Fluid-Pressure Circuits (AREA)

Abstract

PURPOSE: In a case where an oil leakage occurs in any of front and rear pipelines of a counterbalance valve, to stop a plurality of actuators such as hydraulic cylinders all at a time, thereby accurately preventing respective actuators and work pieces from operating on the load side.
CONSTITUTION: A single counterbalance valve 6 is provided between positively operating supply circuits 13 and 15, and pilot type control valves are unitarily provided in respective actuators 8a and 8b. Each of control valves 7a and 7b between positively operating branch circuits 13, 15 and positively operating oil chambers 19a, 19b, is made switchable to a position allowing only the flow of oil from the positively operating branch circuits 16a, 16b to the positively operating oil chambers 19a, 19b and to a position allowing only the flow of oil from the positively operating oil chambers 19a, 19b to the positively operating branch circuits 16, 16b. The pilot setting pressures of respective control valves 7a and 7b are made lower than the pilot setting pressure of the counterbalance valve 6.
COPYRIGHT: (C)1979,JPO&Japio
JP6625378A 1978-05-31 1978-05-31 Safety device of hydraulic circuit having a plurality of actuators Granted JPS54156985A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6625378A JPS54156985A (en) 1978-05-31 1978-05-31 Safety device of hydraulic circuit having a plurality of actuators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6625378A JPS54156985A (en) 1978-05-31 1978-05-31 Safety device of hydraulic circuit having a plurality of actuators

Publications (2)

Publication Number Publication Date
JPS54156985A true JPS54156985A (en) 1979-12-11
JPS6334321B2 JPS6334321B2 (en) 1988-07-08

Family

ID=13310504

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6625378A Granted JPS54156985A (en) 1978-05-31 1978-05-31 Safety device of hydraulic circuit having a plurality of actuators

Country Status (1)

Country Link
JP (1) JPS54156985A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5737102U (en) * 1980-08-13 1982-02-26
JPS5740104A (en) * 1980-08-23 1982-03-05 Kato Seisakusho:Kk Device for preventing hydraulic cylinder from acting due to oil leak
JPS59501451A (en) * 1982-07-13 1984-08-16 アプライド　パワ−　インコ−ポレイテツド Tilting cab truck including a device for uniformly advancing and retracting the tilting cylinder
JPS6061503U (en) * 1983-10-04 1985-04-30 三菱重工業株式会社 Hydraulic system for lifting equipment
JPH01173504U (en) * 1988-05-30 1989-12-08

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4729194U (en) * 1971-04-28 1972-12-02
JPS5290787A (en) * 1976-01-23 1977-07-30 Caterpillar Tractor Co Fluid system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4729194U (en) * 1971-04-28 1972-12-02
JPS5290787A (en) * 1976-01-23 1977-07-30 Caterpillar Tractor Co Fluid system

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5737102U (en) * 1980-08-13 1982-02-26
JPS5740104A (en) * 1980-08-23 1982-03-05 Kato Seisakusho:Kk Device for preventing hydraulic cylinder from acting due to oil leak
JPS6352246B2 (en) * 1980-08-23 1988-10-18 Kato Seisakusho Kk
JPS59501451A (en) * 1982-07-13 1984-08-16 アプライド　パワ−　インコ−ポレイテツド Tilting cab truck including a device for uniformly advancing and retracting the tilting cylinder
JPS6351909B2 (en) * 1982-07-13 1988-10-17 Applied Power Ind Inc
JPS6061503U (en) * 1983-10-04 1985-04-30 三菱重工業株式会社 Hydraulic system for lifting equipment
JPH01173504U (en) * 1988-05-30 1989-12-08

Also Published As

Publication number Publication date
JPS6334321B2 (en) 1988-07-08

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