JPS57240A - Controller for oil pressure of construction equipment - Google Patents

Controller for oil pressure of construction equipment

Info

Publication number
JPS57240A
JPS57240A JP7149080A JP7149080A JPS57240A JP S57240 A JPS57240 A JP S57240A JP 7149080 A JP7149080 A JP 7149080A JP 7149080 A JP7149080 A JP 7149080A JP S57240 A JPS57240 A JP S57240A
Authority
JP
Japan
Prior art keywords
pump
port
discharge
pilot
neutral position
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
JP7149080A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0255568B2 (enrdf_load_stackoverflow
Inventor
Hidekazu Sato
Mitsuru Arai
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.)
Komatsu Ltd
Original Assignee
Komatsu 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 Komatsu Ltd filed Critical Komatsu Ltd
Priority to JP7149080A priority Critical patent/JPS57240A/ja
Publication of JPS57240A publication Critical patent/JPS57240A/ja
Publication of JPH0255568B2 publication Critical patent/JPH0255568B2/ja
Granted legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2278—Hydraulic circuits
    • E02F9/2296—Systems with a variable displacement pump

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Operation Control Of Excavators (AREA)
  • Fluid-Pressure Circuits (AREA)
JP7149080A 1980-05-30 1980-05-30 Controller for oil pressure of construction equipment Granted JPS57240A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7149080A JPS57240A (en) 1980-05-30 1980-05-30 Controller for oil pressure of construction equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7149080A JPS57240A (en) 1980-05-30 1980-05-30 Controller for oil pressure of construction equipment

Publications (2)

Publication Number Publication Date
JPS57240A true JPS57240A (en) 1982-01-05
JPH0255568B2 JPH0255568B2 (enrdf_load_stackoverflow) 1990-11-27

Family

ID=13462146

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7149080A Granted JPS57240A (en) 1980-05-30 1980-05-30 Controller for oil pressure of construction equipment

Country Status (1)

Country Link
JP (1) JPS57240A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0183416U (enrdf_load_stackoverflow) * 1987-11-19 1989-06-02
EP1977819A2 (en) 1996-12-06 2008-10-08 Basf Catalysts Llc Catalytic metal plate

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0183416U (enrdf_load_stackoverflow) * 1987-11-19 1989-06-02
EP1977819A2 (en) 1996-12-06 2008-10-08 Basf Catalysts Llc Catalytic metal plate

Also Published As

Publication number Publication date
JPH0255568B2 (enrdf_load_stackoverflow) 1990-11-27

Similar Documents

Publication Publication Date Title
GB1510064A (en) Priority flow valve
EP0393195A4 (en) Fluid control mechanism for power shovels
JPS57240A (en) Controller for oil pressure of construction equipment
JPS5587865A (en) Control circuit of variable capacity pump
GB1509286A (en) Selective and proportional hydraulic remote control device in particular for handling public works gears
JPS57242A (en) Controller for oil pressure of construction equipment
JPS57241A (en) Controller for oil pressure of construction equipment
JPS56143803A (en) Fluid controller
GB1599411A (en) Fluid pressure circuit control arrangement
GB807267A (en) Improvements in or relating to fluid pressure valves
JPS57205638A (en) Oil-pressure circuit for oil-pressure shovel
JPS5659003A (en) Oil pressure controller
JPS54156985A (en) Safety device of hydraulic circuit having a plurality of actuators
GB574179A (en) Improvements in or relating to valves for use in fluid pressure systems
JPS5758737A (en) Construction machinery such as power shovel
GB1408607A (en) Hydraulic valve means
AU566630B2 (en) Override control of variable displacement pump
JPS5758735A (en) Construction machinery such as power shovel
JPS57143180A (en) Control method of variable displacement oil hydraulic pump
GB740429A (en) Improvements in or relating to selector valves for hydraulic systems
GB801551A (en) Measuring valves and systems
JPS57107486A (en) Fluid control valve
JPS5761121A (en) Oil pressure circuit for construction machinery
JPS5682654A (en) Brake valve
JPS552171A (en) Hydraulic excavator