EP1897847A2 - Appareil de chargement - Google Patents

Appareil de chargement Download PDF

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Publication number
EP1897847A2
EP1897847A2 EP07115448A EP07115448A EP1897847A2 EP 1897847 A2 EP1897847 A2 EP 1897847A2 EP 07115448 A EP07115448 A EP 07115448A EP 07115448 A EP07115448 A EP 07115448A EP 1897847 A2 EP1897847 A2 EP 1897847A2
Authority
EP
European Patent Office
Prior art keywords
hydraulic
hydraulic cylinder
charger
boom
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
EP07115448A
Other languages
German (de)
English (en)
Other versions
EP1897847B1 (fr
EP1897847A3 (fr
Inventor
Marcus Bitter
Richard Tudor
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.)
Deere and Co
Original Assignee
Deere and Co
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 Deere and Co filed Critical Deere and Co
Publication of EP1897847A2 publication Critical patent/EP1897847A2/fr
Publication of EP1897847A3 publication Critical patent/EP1897847A3/fr
Application granted granted Critical
Publication of EP1897847B1 publication Critical patent/EP1897847B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/20—Means for actuating or controlling masts, platforms, or forks
    • B66F9/22—Hydraulic devices or systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F17/00—Safety devices, e.g. for limiting or indicating lifting force
    • 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
    • E02F9/24—Safety devices, e.g. for preventing overload
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/003—Systems with load-holding valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
    • F15B2211/50545—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using braking valves to maintain a back pressure

Definitions

  • the invention relates to a charger with a hydraulically actuatable boom, a sensor for monitoring the load condition on the charger and a hydraulic arrangement for actuating the boom and / or a tool mounted on the boom, wherein the hydraulic arrangement comprises at least one hydraulic cylinder with a rod-side and a piston-side supply line , at least one mechanically switchable control unit for controlling the at least one hydraulic cylinder, a hydraulic source, a hydraulic tank and an electronic control unit.
  • the WO 2004/007339 A1 discloses such a system.
  • a tilting moment acting on the vehicle is detected by sensors and fed to an electronic control.
  • several hydraulic cylinders for lifting, lowering and telescoping a telescopic boom and an electro-hydraulic control of the hydraulic cylinder are provided.
  • the system provides that, when approaching a predetermined threshold for the stalling torque, the hydraulic functions to operate the hydraulic cylinders are slowed down before the complete stoppage of the hydraulic cylinders occurs.
  • the load signal is further processed electronically and the operating possibilities are reduced by the operator or the actuation is prevented.
  • the more mature the technique is, for. B. by electronic control units, the easier is the intervention by the electronics.
  • valve spools of the control unit are controlled by hoists or levers
  • WO 2004/007339 A1 disclosed doctrine not applicable, since not controlled in such a simple manner in the mechanically performed by the operator functions can be intervened as a suitable electronics is missing.
  • the object underlying the invention is seen to provide a charger of the type mentioned, by which the aforementioned disadvantages are overcome.
  • a charger of the type mentioned is designed such that between the control unit and the hydraulic cylinder volume flow limiting means are provided with which a volume flow in at least one of the rod-side or piston-side supply lines of the hydraulic cylinder can be limited depending on a sensor signal supplied by the sensor.
  • the volume flow varying means the operability of the controlled via a mechanically controlled control unit hydraulic cylinder is influenced such that a volume flow of the hydraulic fluid flowing into one of the two chambers of the hydraulic cylinder is limited or reduced, so that the speed at which a certain amount of Hydraulic fluid flows into one of the chambers flows limited or reduced and ultimately thereby the movement of the hydraulic cylinder and the piston is slowed down.
  • the volume flow of the hydraulic fluid flowing into the chamber of the hydraulic cylinder is thereby reduced more strongly, the closer one approaches a critical value for the load state, which is predetermined by the electronic control unit.
  • the functions of the hydraulic cylinder are first slowed down and then finally completely prevented.
  • the volume flow limiting means comprise at least one controllable by the electronic control unit electro-hydraulic pressure relief valve and are in a connecting line extending between the rod-side and piston-side supply line.
  • the electrohydraulic pressure relief valve can be increasingly opened depending on the load signal or overload signal supplied by the sensor. The further you approach the preset threshold, the greater the risk that the vehicle tilts, and the lower the pressure relief valves are set or the more the pressure relief valves are opened.
  • more and more volume of hydraulic fluid can flow away from one connecting line into the other connecting line. Due to the resulting decreasing volume flow for the affected, connected to the rod-side or piston-side supply line chamber, the piston of the hydraulic cylinder is moved less quickly or is slowing down to a standstill.
  • a check valve is provided in the connection line, so that the hydraulic fluid can flow only in one direction through the pressure relief valve from the rod-side supply line into the piston-side supply line, or vice versa.
  • a check valve is already integrated in the pressure relief valve.
  • the hydraulic cylinder can be operated in the opposite direction of movement as usual.
  • a plurality of hydraulic cylinders are arranged in the hydraulic arrangement and thus a plurality of control devices for controlling the hydraulic cylinders can be used. In the event that multiple control units or more hydraulic cylinders are used, can according to several electro-hydraulic pressure relief valves are used, which are adjusted by the electronic control unit in response to the sensor signal.
  • the volume flow limiting means also comprise at least one controllable by the electronic control unit electro-hydraulic pressure relief valve, but they are arranged in a branching from the rod side or piston side supply line to the hydraulic tank discharge line.
  • the branched off via the pressure relief valve from the rod side or piston-side supply line hydraulic fluid is fed directly into the hydraulic tank and not in the piston-side or rod-side supply line.
  • the pressure acting in the previous exemplary embodiment connecting line
  • a pressure relief valve which is arranged in a directly leading into the hydraulic tank drain line, this is not the case.
  • the charger is preferably designed as a telescopic loader, wherein the boom via a first hydraulic cylinder in its angle and a second hydraulic cylinder in its length is variable and wherein a third hydraulic cylinder may be provided with which a tool arranged on the boom is pivotable.
  • a third hydraulic cylinder may be provided with which a tool arranged on the boom is pivotable.
  • the charger comprises a front loader, wherein the boom is designed as a rocker of a front loader, which is variable in its angle of attack via a first or a first and a second hydraulic cylinder.
  • a third hydraulic cylinder may be provided, with which a tool provided on the boom, for example a loading shovel or a loading fork, can be pivoted.
  • the senor is designed and arranged such that a critical load condition on the charger can be detected.
  • the sensor may be on an axle of the vehicle, for example be arranged and signal with a correspondingly high, one-sided load a critical state of charge.
  • strain gauges or force sensors can be used. It is also conceivable to position the sensor at another suitable location and, for example, to define the inclination of a vehicle frame relative to the vehicle axle as a critical state of charge state.
  • FIG. 1 shows a charger 10 is shown in the form of a telescopic loader.
  • the telescopic loader has a frame 12, on which a boom 14 is articulated.
  • the frame is supported by a front axle 16 and a rear axle 18 with respective front and rear wheels 20, 22.
  • the boom 14 is formed as a telescopic boom and is articulated via a hydraulic cylinder 24 in its angle relative to the frame 12 adjustable.
  • a second hydraulic cylinder is arranged inside the boom 14 (not shown) and allows the extension and retraction (telescoping) of the boom.
  • a third hydraulic cylinder is disposed at the free end of the boom 14 in the interior and allows the pivoting or tilting of a loading tool 26th
  • the charger 10 has a hydraulic source 28 and a hydraulic tank 30, which are arranged below the vehicle body and serve to supply the hydraulic components.
  • the hydraulic components are shown substantially in FIG.
  • FIG. 2 shows a hydraulic arrangement 36 provided for the charger 10.
  • the hydraulic arrangement 36 comprises the hydraulic cylinder 24, and optionally the hydraulic cylinder (not shown) for telescoping the boom and tilting the loading tool.
  • the hydraulic cylinder 24 is connected via a first and second hydraulic supply line 38, 40 with a mechanically controllable control unit 42, via which the connection of the supply lines 38, 40 with the hydraulic pump 28 and the hydraulic tank 30 can be produced.
  • the control unit 42 is mechanically connected to the operating device 34, for example via building trains, so that a displacement of the control device 42 or of the valve slide of the control unit 42 can take place by adjusting the operating device 34.
  • a load-holding valve 44 is arranged in the hub Leten chamber of the hydraulic cylinder 24 associated supply line 40.
  • the load holding valve comprises a pressure relief valve 46 which can be opened in the direction of the control unit 42, which is arranged in the supply line 40 and can be opened via control pressure lines 48, 50, which are connected to both supply lines 38, 40, and in the direction of the hydraulic cylinder, arranged in a bypass line 24 opens check valve 52.
  • the load-holding valve 44 serves to ensure that in the event of a pipe break on the lift side of the hydraulic cylinder 24, no hydraulic fluid can escape and the hydraulic cylinder 24 maintains its position.
  • the control unit 42 comprises three slide positions, one for lifting, one for lowering and another for holding the hydraulic cylinder.
  • the control unit 42 is formed as a mechanically switchable or mechanically controllable proportional valve and can be mechanically controlled or adjusted via an actuating device 54, wherein the actuating device 54 is mechanically coupled to the operating device 34.
  • the mechanically actuatable control device 42 establishes a connection or disconnection of the hydraulic pump 28 with the supply lines 38, 40.
  • an operating lever located on the operating device 34 is pushed forward, whereby the operation of the control unit 42 takes place and this is shifted to its lifting position and the hydraulic cylinder 24 is filled with hydraulic fluid on the stroke side, that is extended.
  • a corresponding opposite operation of the operating lever would cause a displacement of the control unit 42 in the lowering position, whereupon the hydraulic cylinder 24 would be drained.
  • a connecting line 56 is provided which extends between the two supply lines 38, 40.
  • a check valve 58 closing in the direction of the rod-side supply line 38 is arranged, which prevents hydraulic fluid from flowing from the piston-side supply line 40 into the rod-side supply line 38.
  • an electro-hydraulic pressure relief valve 62 is arranged in the connecting line 56.
  • the pressure relief valve 62 is arranged such that hydraulic fluid can flow out of the rod-side supply line 38 in the direction of the piston-side supply line 40.
  • the electro-hydraulic pressure relief valve 62 is connected to an electronic control unit 64.
  • the overpressure valve 62 opens hydraulic fluid into the piston-side supply line and into the piston Hydraulic tank 30 drains, resulting in that the adjustment speed of the hydraulic cylinder 24 is reduced, since the volume flow of the located in the rod-side supply line hydraulic fluid is reduced. That is, the amount of hydraulic fluid flowing into the rod-side chamber of the hydraulic cylinder decreases and thus the operation of the hydraulic cylinder 24, in this case the lowering of the hydraulic cylinder 24, is slowed down.
  • the arrangement of the check valve 58 and the electro-hydraulic pressure relief valve 62 can be made opposite, so that hydraulic fluid from the piston-side supply line 40 can flow into the rod-side supply line 38. In this case, then the lifting of the hydraulic cylinder 24 would be slowed down.
  • the control of the pressure relief valve 62 is performed by the electronic control unit 64, which in turn receives control signals from a load sensor 66. Depending on the load condition, the sensor 66 signals a more or less critical load condition. If one approaches the critical load state, the control signal emitted by the electronic control unit 64 also amplifies to adjust the overpressure valve 62, which is then opened further, so that the outflowing volume flow increases.
  • the adjustment or the gain of the control signal is preferably proportional to the signal supplied by the sensor.
  • the sensor is preferably arranged on the rear axle 18 of the charger 10.
  • the sensor 66 is designed as a strain gauge and registers or detects the deflection of the rear axle 18. From the signal values for the deflection can then be closed to the loading or unloading of the rear axle 18. If the load on the rear axle 18 decreases progressively, this may indicate a critical load condition, namely at the latest when no load on the rear axle 18 is detected or signaled. In this case, the charger 10 begins to tip over. The same is also conceivable for the front axle 16.
  • FIG. 3 shows an alternative exemplary embodiment of a hydraulic arrangement 56 ', in which, instead of the connecting line 56 from FIG. 2, a drain line 56' is arranged, in which the electrohydraulic pressure relief valve 62 is arranged.
  • the drain line 56 ' branches off from the rod-side supply line 38 and leads into the hydraulic tank 30.
  • hydraulic fluid can flow directly into the hydraulic tank 30.
  • the control of the pressure relief valve takes place analogously to the embodiment shown in Figure 2.
  • no check valve 58 is provided, since there is no connection of the piston-side supply line 40 to the discharge line 56'.
  • FIGS. 2 and 3 representatively represent the arrangement of only one hydraulic cylinder 24.
  • further hydraulic cylinders (not shown) can be used in parallel, which can be actuated in the same way by an actuating device 34 and also in a hydraulic arrangement 36, 36 ', as shown in Figures 2 and 3, are involved.
  • not only is it possible to limit or slow down the retraction or lowering of the hydraulic cylinder 24.
  • control pressure line 56 with the lifting position of the control unit 42 and thus the lifting of the hydraulic cylinder 24 is controlled, provided with an electro-hydraulic pressure relief valve 62 and connected.
  • the piston-side supply line 40 would be connected to a corresponding outflow line 56 'with an electro-hydraulic overpressure valve 62.
  • FIG. 4 shows a further embodiment of a charger 10 in the form of a tractor 68 with front loader 70, wherein for the same components of the charger 10, such as frame 12, front axle 16, rear axle 16, wheels 20, 22, loading tool 26 and cabin 32, the same reference numerals be valid.
  • the rockers 70 the two sides of the tractor 68th are arranged, a boom, by its operation in certain situations and overloads critical load conditions of the charger 10 can be caused.
  • the hydraulic cylinders 74 arranged for actuating the rockers 70 and the hydraulic cylinders 76 arranged for actuating the loading tool 26 are operated analogously to the hydraulic arrangements 36, 36 'shown in FIGS. 2 and 3.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Geology (AREA)
  • Transportation (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Operation Control Of Excavators (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Component Parts Of Construction Machinery (AREA)
EP07115448A 2006-09-08 2007-08-31 Appareil de chargement Not-in-force EP1897847B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006042372A DE102006042372A1 (de) 2006-09-08 2006-09-08 Ladegerät

Publications (3)

Publication Number Publication Date
EP1897847A2 true EP1897847A2 (fr) 2008-03-12
EP1897847A3 EP1897847A3 (fr) 2009-06-17
EP1897847B1 EP1897847B1 (fr) 2012-06-06

Family

ID=38683486

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07115448A Not-in-force EP1897847B1 (fr) 2006-09-08 2007-08-31 Appareil de chargement

Country Status (5)

Country Link
US (1) US7845896B2 (fr)
EP (1) EP1897847B1 (fr)
JP (1) JP5503103B2 (fr)
DE (1) DE102006042372A1 (fr)
ES (1) ES2389136T3 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTO20100776A1 (it) * 2010-09-23 2012-03-24 Merlo Project Srl Veicolo sollevatore
ITTO20110399A1 (it) * 2011-05-06 2012-11-07 Merlo Project Srl Veicolo sollevatore
CN102783283A (zh) * 2011-05-14 2012-11-21 罗伯特·博世有限公司 升降机构
EP2829504A1 (fr) * 2013-07-23 2015-01-28 Palfinger Platforms GmbH Procédé de commande d'une machine de travail et système hydraulique pour une plate-forme élévatrice
IT201700047745A1 (it) * 2017-05-03 2018-11-03 Cnh Ind Italia Spa Veicolo provvisto di un braccio comprendente un circuito di controllo idraulico avente una valvola di controllo di carico
EP3594509A1 (fr) * 2018-07-05 2020-01-15 Guima Palfinger S.A.S. Dispositif de levage comprenant un circuit hydraulique perfectionné pour autoriser une phase de retour bennage rapide

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2815333C (fr) * 2010-11-12 2015-05-19 Jlg Industries, Inc. Systeme de surveillance de stabilite longitudinale
JP6177562B2 (ja) * 2013-03-28 2017-08-09 三菱日立パワーシステムズ株式会社 油圧装置及び原動装置
EP3181763A1 (fr) * 2015-12-15 2017-06-21 Caterpillar Global Mining LLC Bloc de vanne à actionneur double hydraulique
DE102016205582A1 (de) * 2016-04-05 2017-10-05 Robert Bosch Gmbh Hydraulische Antriebsvorrichtung mit Regenerationsbetrieb
KR20190095287A (ko) 2016-12-16 2019-08-14 클라크 이큅먼트 컴파니 접이식 리프트 아암을 갖는 로더
USD832552S1 (en) 2017-10-12 2018-10-30 Clark Equipment Company Lift arm for loader
USD832551S1 (en) 2017-10-12 2018-10-30 Clark Equipment Company Loader
CN108455487A (zh) * 2018-03-16 2018-08-28 王静 一种手扶液压搬运装置及其使用方法
EP3778298B1 (fr) * 2019-08-13 2024-06-26 Rotex Automation Limited Soupape de commande de cabine intégrée dotée d'une soupape de commande de direction de solénoïde

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0580007A1 (fr) 1992-07-21 1994-01-26 A. WEBER ANLAGENBAU GmbH & Co. KG Dispositif pour commander le pivotement d'une flèche dont la longueur effective est variable
WO2004007339A1 (fr) 2002-07-12 2004-01-22 J.C. Bamford Excavators Limited Systeme de commande pour appareil de manipulation de charge

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1528741A (en) * 1974-10-12 1978-10-18 Liner Concrete Machinery Load handling vehicle
JPH10310394A (ja) * 1997-05-15 1998-11-24 Toyota Autom Loom Works Ltd フォークリフトのティルト制御装置
DE19853523C1 (de) * 1998-11-20 2000-03-09 Schaeff Karl Gmbh & Co Fahrbarer Schaufellader
JP2001226096A (ja) * 2000-02-15 2001-08-21 Komatsu Forklift Co Ltd 産業車両の転倒警報装置及び転倒防止装置
ES2289436T3 (es) * 2003-07-05 2008-02-01 DEERE & COMPANY Suspension hidraulica.
DE102004031248A1 (de) * 2004-06-29 2006-02-09 Plustech Oy Ladegerät
US7204084B2 (en) * 2004-10-29 2007-04-17 Caterpillar Inc Hydraulic system having a pressure compensator
DE102005043447A1 (de) * 2005-09-13 2007-03-15 Deere & Company, Moline Ladegerät sowie Verfahren für ein Ladegerät
SE531309C2 (sv) * 2006-01-16 2009-02-17 Volvo Constr Equip Ab Styrsystem för en arbetsmaskin och förfarande för styrning av en hydraulcylinder hos en arbetsmaskin

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0580007A1 (fr) 1992-07-21 1994-01-26 A. WEBER ANLAGENBAU GmbH & Co. KG Dispositif pour commander le pivotement d'une flèche dont la longueur effective est variable
WO2004007339A1 (fr) 2002-07-12 2004-01-22 J.C. Bamford Excavators Limited Systeme de commande pour appareil de manipulation de charge

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTO20100776A1 (it) * 2010-09-23 2012-03-24 Merlo Project Srl Veicolo sollevatore
ITTO20110399A1 (it) * 2011-05-06 2012-11-07 Merlo Project Srl Veicolo sollevatore
EP2520536A1 (fr) * 2011-05-06 2012-11-07 Merlo Project S.r.l. Véhicule de levage
CN102783283A (zh) * 2011-05-14 2012-11-21 罗伯特·博世有限公司 升降机构
EP2524585A3 (fr) * 2011-05-14 2014-06-04 Robert Bosch Gmbh Dispositif de levage
EP2829504A1 (fr) * 2013-07-23 2015-01-28 Palfinger Platforms GmbH Procédé de commande d'une machine de travail et système hydraulique pour une plate-forme élévatrice
IT201700047745A1 (it) * 2017-05-03 2018-11-03 Cnh Ind Italia Spa Veicolo provvisto di un braccio comprendente un circuito di controllo idraulico avente una valvola di controllo di carico
WO2018202659A1 (fr) * 2017-05-03 2018-11-08 Cnh Industrial Italia S.P.A. Véhicule pourvu d'une flèche comprenant un circuit de commande hydraulique avec une soupape de commande de charge
US11225981B2 (en) 2017-05-03 2022-01-18 Cnh Industrial America Llc Vehicle with a boom comprising a hydraulic control circuit with a load control valve
EP3594509A1 (fr) * 2018-07-05 2020-01-15 Guima Palfinger S.A.S. Dispositif de levage comprenant un circuit hydraulique perfectionné pour autoriser une phase de retour bennage rapide

Also Published As

Publication number Publication date
EP1897847B1 (fr) 2012-06-06
US7845896B2 (en) 2010-12-07
JP2008063142A (ja) 2008-03-21
DE102006042372A1 (de) 2008-03-27
JP5503103B2 (ja) 2014-05-28
US20080073155A1 (en) 2008-03-27
ES2389136T3 (es) 2012-10-23
EP1897847A3 (fr) 2009-06-17

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