FR2449751B1 - - Google Patents

Info

Publication number
FR2449751B1
FR2449751B1 FR8004111A FR8004111A FR2449751B1 FR 2449751 B1 FR2449751 B1 FR 2449751B1 FR 8004111 A FR8004111 A FR 8004111A FR 8004111 A FR8004111 A FR 8004111A FR 2449751 B1 FR2449751 B1 FR 2449751B1
Authority
FR
France
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.)
Expired
Application number
FR8004111A
Other languages
French (fr)
Other versions
FR2449751A1 (en
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
Priority claimed from JP2077679A external-priority patent/JPS55115606A/en
Priority claimed from JP8021279A external-priority patent/JPS566901A/en
Priority claimed from JP54134259A external-priority patent/JPS595166B2/en
Application filed by Hitachi Construction Machinery Co Ltd filed Critical Hitachi Construction Machinery Co Ltd
Publication of FR2449751A1 publication Critical patent/FR2449751A1/en
Application granted granted Critical
Publication of FR2449751B1 publication Critical patent/FR2449751B1/fr
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
    • E02F9/2217—Hydraulic or pneumatic drives with energy recovery arrangements, e.g. using accumulators, flywheels
    • 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
    • E02F9/2242—Control of flow rate; Load sensing arrangements using two or more pumps with cross-assistance including an electronic controller
    • 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
FR8004111A 1979-02-26 1980-02-25 ACTUATION SYSTEM FOR CONSTRUCTION MACHINES AND METHOD FOR CONTROLLING HYDRAULIC CIRCUITS OF SUCH A SYSTEM Granted FR2449751A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2077679A JPS55115606A (en) 1979-02-26 1979-02-26 Closed hydraulic circuit for controlling operation of pump
JP8021279A JPS566901A (en) 1979-06-27 1979-06-27 Hydraulic circuit for construction equipment
JP54134259A JPS595166B2 (en) 1979-10-19 1979-10-19 Control method of pump control hydraulic circuit

Publications (2)

Publication Number Publication Date
FR2449751A1 FR2449751A1 (en) 1980-09-19
FR2449751B1 true FR2449751B1 (en) 1985-04-12

Family

ID=27283160

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8004111A Granted FR2449751A1 (en) 1979-02-26 1980-02-25 ACTUATION SYSTEM FOR CONSTRUCTION MACHINES AND METHOD FOR CONTROLLING HYDRAULIC CIRCUITS OF SUCH A SYSTEM

Country Status (4)

Country Link
DE (1) DE3007011A1 (en)
FR (1) FR2449751A1 (en)
GB (1) GB2045360B (en)
SE (1) SE448762B (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57197336A (en) * 1981-05-29 1982-12-03 Komatsu Ltd Oil-pressure circuit for turning excavator
JPS5817202A (en) * 1981-07-24 1983-02-01 Hitachi Constr Mach Co Ltd Control unit for hydraulic circuit
JPS5857504A (en) * 1981-10-02 1983-04-05 Hitachi Constr Mach Co Ltd Controller for hydraulic circuit
US4537029A (en) * 1982-09-23 1985-08-27 Vickers, Incorporated Power transmission
DE3789230T2 (en) * 1987-01-30 1994-06-09 Komatsu Mfg Co Ltd CONTROL UNIT.
DE3704452A1 (en) * 1987-02-10 1988-08-18 Mannesmann Ag Hydraulic system for an excavator
GB2250108B (en) * 1990-10-31 1995-02-08 Samsung Heavy Ind Control system for automatically controlling actuators of an excavator
JP5572586B2 (en) 2011-05-19 2014-08-13 日立建機株式会社 Hydraulic drive device for work machine
JP5973979B2 (en) 2013-11-21 2016-08-23 日立建機株式会社 Drive device for work machine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2631530A1 (en) * 1976-07-14 1978-01-19 Weserhuette Ag Eisenwerk Control system for hydraulically driven excavator - has minimal number of operating levers for interlocked individual circuits

Also Published As

Publication number Publication date
DE3007011A1 (en) 1981-01-15
SE448762B (en) 1987-03-16
GB2045360B (en) 1982-12-08
SE8001459L (en) 1980-08-27
GB2045360A (en) 1980-10-29
FR2449751A1 (en) 1980-09-19
DE3007011C2 (en) 1987-01-02

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Legal Events

Date Code Title Description
ST Notification of lapse