JPS57116840A - Operating device for civil engineering work and construction machinery - Google Patents

Operating device for civil engineering work and construction machinery

Info

Publication number
JPS57116840A
JPS57116840A JP77081A JP77081A JPS57116840A JP S57116840 A JPS57116840 A JP S57116840A JP 77081 A JP77081 A JP 77081A JP 77081 A JP77081 A JP 77081A JP S57116840 A JPS57116840 A JP S57116840A
Authority
JP
Japan
Prior art keywords
valve
switch valve
pressure
switch
tank
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
JP77081A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6362608B2 (enrdf_load_stackoverflow
Inventor
Toichi Hirata
Seiji Tamura
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 JP77081A priority Critical patent/JPS57116840A/ja
Publication of JPS57116840A publication Critical patent/JPS57116840A/ja
Publication of JPS6362608B2 publication Critical patent/JPS6362608B2/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
    • E02F9/2278—Hydraulic circuits
    • E02F9/2292—Systems with two or more pumps
    • 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
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • E02F9/2239—Control of flow rate; Load sensing arrangements using two or more pumps with cross-assistance

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Operation Control Of Excavators (AREA)
  • Fluid-Pressure Circuits (AREA)
JP77081A 1981-01-08 1981-01-08 Operating device for civil engineering work and construction machinery Granted JPS57116840A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP77081A JPS57116840A (en) 1981-01-08 1981-01-08 Operating device for civil engineering work and construction machinery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP77081A JPS57116840A (en) 1981-01-08 1981-01-08 Operating device for civil engineering work and construction machinery

Publications (2)

Publication Number Publication Date
JPS57116840A true JPS57116840A (en) 1982-07-21
JPS6362608B2 JPS6362608B2 (enrdf_load_stackoverflow) 1988-12-02

Family

ID=11482923

Family Applications (1)

Application Number Title Priority Date Filing Date
JP77081A Granted JPS57116840A (en) 1981-01-08 1981-01-08 Operating device for civil engineering work and construction machinery

Country Status (1)

Country Link
JP (1) JPS57116840A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS612568U (ja) * 1984-06-12 1986-01-09 ハンド−ザ−工業株式会社 土工用車輌における油圧ポンプの合流装置
JPS612567U (ja) * 1984-06-07 1986-01-09 ハンド−ザ−工業株式会社 土工用車輌における油圧ポンプの合流装置
JP2016125559A (ja) * 2014-12-26 2016-07-11 株式会社クボタ 作業機の油圧システム及びこの油圧システムを備えた作業機

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54148004U (enrdf_load_stackoverflow) * 1978-04-05 1979-10-15
JPS5513254U (enrdf_load_stackoverflow) * 1978-07-10 1980-01-28

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54148004U (enrdf_load_stackoverflow) * 1978-04-05 1979-10-15
JPS5513254U (enrdf_load_stackoverflow) * 1978-07-10 1980-01-28

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS612567U (ja) * 1984-06-07 1986-01-09 ハンド−ザ−工業株式会社 土工用車輌における油圧ポンプの合流装置
JPS612568U (ja) * 1984-06-12 1986-01-09 ハンド−ザ−工業株式会社 土工用車輌における油圧ポンプの合流装置
JP2016125559A (ja) * 2014-12-26 2016-07-11 株式会社クボタ 作業機の油圧システム及びこの油圧システムを備えた作業機

Also Published As

Publication number Publication date
JPS6362608B2 (enrdf_load_stackoverflow) 1988-12-02

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