JPS643305A - Driving controller for hydraulic machine - Google Patents

Driving controller for hydraulic machine

Info

Publication number
JPS643305A
JPS643305A JP62193740A JP19374087A JPS643305A JP S643305 A JPS643305 A JP S643305A JP 62193740 A JP62193740 A JP 62193740A JP 19374087 A JP19374087 A JP 19374087A JP S643305 A JPS643305 A JP S643305A
Authority
JP
Japan
Prior art keywords
neutral position
output
hydraulic machine
driving controller
control unit
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
JP62193740A
Other languages
Japanese (ja)
Other versions
JPH0768965B2 (en
Inventor
Ichiro Hirami
Masakazu Haga
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.)
Hitachi Construction Machinery Co Ltd
Original Assignee
Hitachi Construction Machinery 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 Hitachi Construction Machinery Co Ltd filed Critical Hitachi Construction Machinery Co Ltd
Priority to JP62193740A priority Critical patent/JPH0768965B2/en
Publication of JPS643305A publication Critical patent/JPS643305A/en
Publication of JPH0768965B2 publication Critical patent/JPH0768965B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Fluid-Pressure Circuits (AREA)

Abstract

PURPOSE:To prevent any unexpected danger by interrupting an output from a control unit to a control valve when an operation device is in its neutral position. CONSTITUTION:A neutral position detector 10 is provided on an operation lever 6, while an electromagnetic switch 12 which operates by means of an output from the neutral position detector 10 provided on a circuit which connects a control unit 7 to a control valve 5. The output from the control unit 7 to the control valve 5 can thus be interrupted when the operation lever 6 is in its neutral position. Therefore, the motion of a hydraulic cylinder 4 can be prevented at malfunction, thereby any unexpected danger can be avoided.
JP62193740A 1987-03-27 1987-08-04 Drive controller for hydraulic machine Expired - Lifetime JPH0768965B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62193740A JPH0768965B2 (en) 1987-03-27 1987-08-04 Drive controller for hydraulic machine

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP62-71761 1987-03-27
JP7176187 1987-03-27
JP62193740A JPH0768965B2 (en) 1987-03-27 1987-08-04 Drive controller for hydraulic machine

Publications (2)

Publication Number Publication Date
JPS643305A true JPS643305A (en) 1989-01-09
JPH0768965B2 JPH0768965B2 (en) 1995-07-26

Family

ID=26412861

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62193740A Expired - Lifetime JPH0768965B2 (en) 1987-03-27 1987-08-04 Drive controller for hydraulic machine

Country Status (1)

Country Link
JP (1) JPH0768965B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994027052A1 (en) * 1993-05-07 1994-11-24 Hitachi Construction Machinery Co., Ltd. Driving controller of hydraulic machine

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS497828A (en) * 1972-05-12 1974-01-24
JPS61146605U (en) * 1985-03-05 1986-09-10

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS497828A (en) * 1972-05-12 1974-01-24
JPS61146605U (en) * 1985-03-05 1986-09-10

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994027052A1 (en) * 1993-05-07 1994-11-24 Hitachi Construction Machinery Co., Ltd. Driving controller of hydraulic machine
US5497805A (en) * 1993-05-07 1996-03-12 Hitachi Construction Machinery Co., Ltd. Drive control system for hydraulic machine

Also Published As

Publication number Publication date
JPH0768965B2 (en) 1995-07-26

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