JPS5620803A - Hydraulic circuit - Google Patents

Hydraulic circuit

Info

Publication number
JPS5620803A
JPS5620803A JP9634079A JP9634079A JPS5620803A JP S5620803 A JPS5620803 A JP S5620803A JP 9634079 A JP9634079 A JP 9634079A JP 9634079 A JP9634079 A JP 9634079A JP S5620803 A JPS5620803 A JP S5620803A
Authority
JP
Japan
Prior art keywords
pressure
load
line
generation
speed reduction
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
JP9634079A
Other languages
Japanese (ja)
Other versions
JPS6234961B2 (en
Inventor
Kenji Masuda
Toshio Ikeda
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.)
Daikin Industries Ltd
Original Assignee
Daikin Industries 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 Daikin Industries Ltd filed Critical Daikin Industries Ltd
Priority to JP9634079A priority Critical patent/JPS5620803A/en
Publication of JPS5620803A publication Critical patent/JPS5620803A/en
Publication of JPS6234961B2 publication Critical patent/JPS6234961B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Fluid-Pressure Circuits (AREA)

Abstract

PURPOSE: To prevent the generation of a negative pressure in a load line upon speed reduction of a load having a negative load by a method wherein a two-port valve opened by a pressure in a pressure line is provided between the pressure line and the load line in a discharging side of a pump.
CONSTITUTION: A two-port valve 40 opened by a pressure in a pressure line 51 is provided between the pressure line 51 in a discharging side of a pump and a load line 53 communicating with a cylinder chamber 30b. In case a change-over valve 21 is switched from a right position b1 to a neutral position for a speed reduction of a load 31, the two-port valve 40 is opened simultaneously with generation of a surge pressure in the pressure line 51 and oil in the pressure line 51 is flowed into the load line 53 and the cylinder chamber 30b. Thereby, generation of a negative pressure in the load line 53 upon speed reduction of the load 31 may be prevented.
COPYRIGHT: (C)1981,JPO&Japio
JP9634079A 1979-07-27 1979-07-27 Hydraulic circuit Granted JPS5620803A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9634079A JPS5620803A (en) 1979-07-27 1979-07-27 Hydraulic circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9634079A JPS5620803A (en) 1979-07-27 1979-07-27 Hydraulic circuit

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP17625086A Division JPS6249001A (en) 1986-07-25 1986-07-25 Hydraulic circuit

Publications (2)

Publication Number Publication Date
JPS5620803A true JPS5620803A (en) 1981-02-26
JPS6234961B2 JPS6234961B2 (en) 1987-07-30

Family

ID=14162278

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9634079A Granted JPS5620803A (en) 1979-07-27 1979-07-27 Hydraulic circuit

Country Status (1)

Country Link
JP (1) JPS5620803A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58142003A (en) * 1982-02-15 1983-08-23 Mitsubishi Heavy Ind Ltd Driving circuit of actuator with vacuum preventive mechanism
JPS58142004A (en) * 1982-02-15 1983-08-23 Mitsubishi Heavy Ind Ltd Control valve for driving actuator with vacuum preventive mechanism
JPS61101103U (en) * 1984-12-11 1986-06-27

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4944180A (en) * 1972-07-13 1974-04-25
JPS5151682A (en) * 1974-10-29 1976-05-07 Daikin Ind Ltd RYUTAISOCHI
JPS52151903A (en) * 1976-06-11 1977-12-16 Daikin Ind Ltd Hydraulic device
JPS5316174A (en) * 1976-07-27 1978-02-14 Budzich Tadeusz Load control device
JPS5410185U (en) * 1977-06-24 1979-01-23
JPS54104760U (en) * 1977-12-29 1979-07-24

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5254238A (en) * 1975-10-29 1977-05-02 Takao Unno Buffer strut for guard cable

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4944180A (en) * 1972-07-13 1974-04-25
JPS5151682A (en) * 1974-10-29 1976-05-07 Daikin Ind Ltd RYUTAISOCHI
JPS52151903A (en) * 1976-06-11 1977-12-16 Daikin Ind Ltd Hydraulic device
JPS5316174A (en) * 1976-07-27 1978-02-14 Budzich Tadeusz Load control device
JPS5410185U (en) * 1977-06-24 1979-01-23
JPS54104760U (en) * 1977-12-29 1979-07-24

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58142003A (en) * 1982-02-15 1983-08-23 Mitsubishi Heavy Ind Ltd Driving circuit of actuator with vacuum preventive mechanism
JPS58142004A (en) * 1982-02-15 1983-08-23 Mitsubishi Heavy Ind Ltd Control valve for driving actuator with vacuum preventive mechanism
JPS61101103U (en) * 1984-12-11 1986-06-27

Also Published As

Publication number Publication date
JPS6234961B2 (en) 1987-07-30

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