EP1577257A2 - Hydraulische Hubvorrichtung für batteriebetriebene Flurförderzeuge - Google Patents
Hydraulische Hubvorrichtung für batteriebetriebene Flurförderzeuge Download PDFInfo
- Publication number
- EP1577257A2 EP1577257A2 EP05004255A EP05004255A EP1577257A2 EP 1577257 A2 EP1577257 A2 EP 1577257A2 EP 05004255 A EP05004255 A EP 05004255A EP 05004255 A EP05004255 A EP 05004255A EP 1577257 A2 EP1577257 A2 EP 1577257A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- lifting
- load
- hydraulic
- valve
- electric machine
- 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
Links
- 244000037459 secondary consumers Species 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 8
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 230000004044 response Effects 0.000 claims description 2
- 238000011084 recovery Methods 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Images
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
-
- 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
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/161—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load
- F15B11/163—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load for sharing the pump output equally amongst users or groups of users, e.g. using anti-saturation, pressure compensation
-
- 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
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/161—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load
- F15B11/165—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load for adjusting the pump output or bypass in response to demand
-
- 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
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/20507—Type of prime mover
- F15B2211/20515—Electric motor
-
- 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
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/2053—Type of pump
- F15B2211/20538—Type of pump constant capacity
-
- 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
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/25—Pressure control functions
- F15B2211/253—Pressure margin control, e.g. pump pressure in relation to load pressure
-
- 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
- F15B2211/30—Directional control
- F15B2211/305—Directional control characterised by the type of valves
- F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
- F15B2211/3053—In combination with a pressure compensating valve
- F15B2211/30535—In combination with a pressure compensating valve the pressure compensating valve is arranged between pressure source and directional control valve
-
- 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
- F15B2211/50536—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using unloading valves controlling the supply pressure by diverting fluid to the return line
Definitions
- the invention relates to a hydraulic lifting device for battery-operated Forklift trucks according to the preamble of patent claim 1.
- a hydraulic lifting device has become known in which at least one hydraulic lifting cylinder is acted upon by a pump in load lifting operation which is driven by an electric machine.
- the pump works as a hydraulic motor and drives the electric machine as generator on (benefit sinks).
- Senkzweig is a hydraulic flow restrictor arranged at which in certain operating points, the total hydraulic pressure falls off and which takes over the load attitude.
- the Senkzweig is between a check valve and the input of the hydraulic pump connected. It is provided at least one secondary consumer, in the lowering operation of the lifting cylinder can be supplied with the medium of the lifting cylinder.
- the electric machine is always operated in the same direction, and the other hydraulic consumer can be supplied directly with hydraulic energy from the sinking process, so that efficiency losses are minimized.
- a speed control ensures a Load-independent control of the lowering speed both in regenerative mode Operation of the electric machine as well as in a control alone over a Valve assembly. Both the lifting and the lowering speed via a speed control of the electric machine. This can happen that the Lowering speed is undesirably high, if due to the high volume flow demand the additional consumer the speed of the electric Machine is increased accordingly.
- a similar lifting device as that described is known from DE 100 10 870 C2 become.
- a throttle valve and a pressure compensator are arranged, and a connection point between throttle valve and pressure compensator is with the input connected to the hydraulic pump, while the output of the pressure compensator to the tank is directed.
- With the lifting device described is even with double operation, i.e. Energy recovery during the lowering process and supply of secondary consumers achieved a relatively good efficiency.
- the invention is based on the object, a hydraulic lifting device for to create battery-operated trucks, with whatever the particular Volume flow requirements minimum flow losses can be achieved.
- the lift valve in the lifting branch is downstream of the branch arranged the line to the secondary consumers.
- the line is upstream of the Control valve connected via a pressure compensator with the tank.
- the pressure compensator with the Pressure in the pressure line (in lifting mode) or pressure at the secondary consumer is driven in order to derive the excess unsolicited quantity (Load sensing).
- an inlet pressure compensator is arranged upstream of the secondary consumer. Due to this design as a load-sensing system in conjunction with 2-way current controller (Inlet pressure compensator) for controlling the secondary consumer the possibility of several secondary functions simultaneously with pressure medium from the Supply load and their operating speed independently depending on the operation of the respective setpoint generator to regulate.
- volumetric flow demand of one or more secondary consumers is greater than the volume flow rate available from the load lowering operation the speed control device that the speed of the electric machine is not around the theoretically resulting differential speed is increased.
- the secondary consumers only as much volume flow is made available as from the Load lowering operation is available. This will cause an unwanted acceleration the lowering process avoided.
- the sole figure shows a circuit diagram for a device according to the invention.
- a hydraulic pump 5 can be seen, which with a electric machine 6 is coupled.
- the electric machine is not powered by one
- the speed control device shown in its speed controlled, the speed setpoint is specified via a speed setpoint generator, by an operator is operated in an industrial truck.
- a Reach truck referred to, a lifting cylinder 1, a tilting cylinder 2, a side thrust cylinder 3 and a push cylinder 4 has.
- the tilt cylinder the mast is tilted backwards or forwards, with the side thrust cylinder is the Load support laterally displaced, and with the push cylinder 4, the mast from Drive part continues on or on this moved forward, as is known.
- the pump 5 provides the pressure medium for all consumers (main consumers Lifting cylinder 1 and secondary consumers 2 to 4) are available, wherein the pressure medium is sucked from a tank 19 via a check valve 17 in the tank line 7.
- the individual valves with which the different consumers are controlled are housed in block 18.
- a lift valve 7 and a check valve 20 are arranged in a pressure or lifting line 9 to the lifting cylinder 1.
- the lifting speed is determined by the speed of the electric motor 6 and this in turn over the setpoint generator, not shown.
- a Senkzweig 8 is between lifting cylinder 1 and connected to the check valve 20 in which a throttle valve 11 is arranged. The other end is connected to the tank line 7 between a check valve 17 and the Pump 5 connected.
- a Branch line 10 connected to the pressure line 9. It serves to supply the mentioned auxiliary consumers.
- two pressure compensators 15 to the Line 10 is connected, whose output is connected to a line 14, the each leads to a control valve 16.
- the control valves 16 With the help of the control valves 16 is the Speed of the secondary consumers controlled. Tilting cylinder and side thrust cylinder are operated together via the control valve 16, via a another valve 22 whose position determines to which of the cylinders 2, 3 the Hydraulic medium flows.
- a tank line 12 is connected, in which a pressure compensator 13 is arranged.
- the hydraulic medium arrives Tank 19, wherein in the conduit 12, a filter 24 is arranged and parallel to this one Check valve 26.
- a first shuttle valve 28 is at the ends in each case with the input of the control valves 16 connected.
- the position of the valve ball depends on which pressure at the two Inputs the larger one is.
- the shuttle valve is connected to the input of a second shuttle valve 30 connected to the other end with the pressure line 9 in Connection stands. Again, the position of the valve ball depends on which Pressure at the two inputs of the shuttle valve is the larger.
- the middle of the second shuttle valve 30 is connected to a control input of the pressure compensator 13. In this way, a load-sensing system is created.
- the operation of the arrangement shown is as follows. Working in lifting mode the hydraulic unit as a pump, and the lifting speed depends on the Specification by the operator via a setpoint generator. This will also the Opening width of the globe valve specified. Stepping during the lifting process Volume flow requirements of the secondary consumers, they are on the Branch line 10 also supplied with hydraulic medium, the amount by the control valves 16 is given, and the pressure compensators 15 ensure that this independent of load happens.
- hydraulic medium passes through the throttle valve 11 Pump 5 and drives it, so that the electric machine 6 operate as a generator and can return power to the battery.
- the hydraulic medium passes through the Branch 10 and the pressure compensator 13 to the tank 19, which happens almost lossless.
- the globe valve 7 is naturally closed.
- Occur volume flow requirements during the lowering process also in terms of Secondary consumers, these can also be supplied. Not needed Hydraulic medium is in turn returned via pressure compensator 13. Exceeds printing and volume flow from the load-lowering operation the pressure and volume flow demand one or more secondary consumers, so in addition to the supply of a or several secondary consumers in parallel generating regenerative excess Power from the load-lowering operation via pump and electric machine 6 possible. Secondary consumers can work independently in the load-lowering mode with pressure medium be supplied in response to the actuation of the control valves 16 or the associated setpoint generator to be controlled.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Transportation (AREA)
- Structural Engineering (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Combustion & Propulsion (AREA)
- Chemical & Material Sciences (AREA)
- Fluid-Pressure Circuits (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
Description
Claims (4)
- Hydraulische Hubvorrichtung für batteriebetriebene Flurförderzeuge, mit mindestens einem hydraulischen Hubzylinder, einem im Lasthebebetrieb als Pumpe arbeitenden, den Hubzylinder mit Druckmittel beschickenden und im Lastsenkbetrieb als Motor arbeitenden, von dem vom Hubzylinder verdrängten Druckmittel angetriebenen Hydraulikpumpe, einer mit der Hydraulikpumpe gekuppelten, im Lasthebebetrieb als Elektromotor und im Lastsenkbetrieb als Generator arbeitenden elektrischen Maschine, einer Drehzahlregeleinrichtung für die elektrische Maschine, wobei die elektrische Maschine durch die Drehzahlregeleinrichtung in Abhängigkeit von der Betätigung eines Sollwertgebers in ihrer Drehzahl regelbar ist, einer Hubventilanordnung in einem zum Hubzylinder führenden Hebenzweig, einem Senkzweig zwischen dem Hubzylinder und einer Verbindung zwischen einem Rückschlagventil und einem Eingang der Hydraulikpumpe, einem Volumenstrombegrenzer im Senkzweig, einer Bypass-Ventilanordnung, welche einen Ausgang der Hydraulikpumpe mit dem Tank verbindet und mindestens einem weiteren hydraulischen Verbraucher, der von der Hydraulikpumpe über ein zugeordnetes Steuerventil versorgbar ist, dadurch gekennzeichnet, daß das Hubventil (7) im Hebenzweig (9) abströmseitig von der Abzweigung einer Leitung (10) zum Nebenverbraucher (2, 3, 4) angeordnet ist und die Leitung (10) aufströmseitig des Steuerventils (16) über eine Druckwaage (13) mit dem Tank (19) verbindbar ist.
- Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Druckwaage (13) mit dem jeweils höheren Druck von Hubzylinder (1) oder Nebenverbraucher (2, 3, 4) angesteuert wird zwecks Ableitung des überschüssigen nicht angeforderten Volumenstroms (Load-Sensing).
- Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß aufströmseitig des Steuerventils (16) eine Eingangsdruckwaage (15) angeordnet ist.
- Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Drehzahlregelvorrichtung für die elektrische Maschine (6) so ausgelegt ist, daß die durch den Lastsenkvorgang vorgegebene Drehzahl nicht erhöht wird, wenn die Volumenstromanforderung des Nebenverbrauchers (2, 3, 4) größer ist als das Volumenstromangebot aus dem Lastsenkvorgang.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004011913A DE102004011913B4 (de) | 2004-03-11 | 2004-03-11 | Hydraulische Hubvorrichtung für batteriebetriebene Flurförderzeuge |
DE102004011913 | 2004-03-11 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1577257A2 true EP1577257A2 (de) | 2005-09-21 |
EP1577257A3 EP1577257A3 (de) | 2005-09-28 |
EP1577257B1 EP1577257B1 (de) | 2009-01-14 |
Family
ID=34833111
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05004255A Active EP1577257B1 (de) | 2004-03-11 | 2005-02-26 | Hydraulische Hubvorrichtung für batteriebetriebene Flurförderzeuge |
Country Status (3)
Country | Link |
---|---|
US (1) | US7181910B2 (de) |
EP (1) | EP1577257B1 (de) |
DE (2) | DE102004011913B4 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014095240A1 (de) * | 2012-12-17 | 2014-06-26 | Jungheinrich Aktiengesellschaft | Hydraulische hubvorrichtung für ein batteriebetriebenes flurförderzeug |
DE102017131164A1 (de) | 2017-12-22 | 2019-06-27 | Linde Material Handling Gmbh | Hydraulisches Antriebssystem einer mobilen Arbeitsmaschine, insbesondere eines Flurförderzeugs |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007010697A1 (de) * | 2007-03-06 | 2008-09-11 | Jungheinrich Aktiengesellschaft | Flurförderzeug |
DE102007028864A1 (de) * | 2007-03-27 | 2008-10-02 | Robert Bosch Gmbh | Hydraulische Steueranordnung |
US7980073B2 (en) * | 2008-05-08 | 2011-07-19 | Caterpillar Inc. | Hybrid system for a powertrain and hydraulic system |
DE102012102092B4 (de) | 2012-03-13 | 2024-04-25 | Still Gesellschaft Mit Beschränkter Haftung | Hydraulikanlage einer mobilen Arbeitsmaschine, insbesondere eines Flurförderzeugs |
SE1350633A1 (sv) * | 2013-05-24 | 2014-11-25 | BAE Systems Hägglunds Aktiebolag | Förfarande och system för styrning av hydraulanordning |
US9975426B2 (en) | 2013-06-26 | 2018-05-22 | Parker-Hannifin Manufacturing Limited | Energy efficient electric vehicle control system |
DE102014108370B4 (de) * | 2014-06-13 | 2020-10-01 | Jungheinrich Aktiengesellschaft | Hydraulische Hubvorrichtung für ein batteriebetriebenes Flurförderzeug |
DE102014114526A1 (de) | 2014-10-07 | 2016-04-07 | Linde Material Handling Gmbh | Hydraulisches Antriebssystem einer batterie-betriebenen mobilen Arbeitsmaschine |
DE102016124506A1 (de) * | 2016-12-15 | 2018-06-21 | Jungheinrich Aktiengesellschaft | Flurförderzeug mit einer Steuereinheit zur Regelung der Bewegung einer Last sowie ein entsprechendes Verfahren |
CN111148905B (zh) | 2018-09-05 | 2021-08-27 | 株式会社日立建机Tierra | 电动式液压工程机械的液压驱动装置 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4402653C2 (de) * | 1994-01-29 | 1997-01-30 | Jungheinrich Ag | Hydraulische Hubvorrichtung für batteriebetriebene Flurförderzeuge |
DE29911686U1 (de) * | 1999-07-06 | 1999-09-16 | Heilmeier & Weinlein Fabrik für Oel-Hydraulik GmbH & Co KG, 81673 München | Elektrohydraulischer Hubmodul |
DE10224730A1 (de) * | 2001-06-29 | 2003-01-16 | Linde Ag | Hydraulische Steuereinrichtung |
DE10010670C2 (de) * | 2000-03-04 | 2003-11-06 | Jungheinrich Ag | Hydraulische Hubvorrichtung für batteriebetriebene Flurförderzeuge |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4127342C2 (de) * | 1991-08-19 | 1995-02-16 | Danfoss As | Hydraulisches System mit einer Pumpe |
DE4423644C2 (de) * | 1994-07-06 | 1998-10-01 | Buchholz Hydraulik | Hydraulische Steuervorrichtung |
-
2004
- 2004-03-11 DE DE102004011913A patent/DE102004011913B4/de not_active Expired - Fee Related
-
2005
- 2005-02-26 DE DE502005006449T patent/DE502005006449D1/de active Active
- 2005-02-26 EP EP05004255A patent/EP1577257B1/de active Active
- 2005-03-09 US US11/075,511 patent/US7181910B2/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4402653C2 (de) * | 1994-01-29 | 1997-01-30 | Jungheinrich Ag | Hydraulische Hubvorrichtung für batteriebetriebene Flurförderzeuge |
DE29911686U1 (de) * | 1999-07-06 | 1999-09-16 | Heilmeier & Weinlein Fabrik für Oel-Hydraulik GmbH & Co KG, 81673 München | Elektrohydraulischer Hubmodul |
DE10010670C2 (de) * | 2000-03-04 | 2003-11-06 | Jungheinrich Ag | Hydraulische Hubvorrichtung für batteriebetriebene Flurförderzeuge |
DE10224730A1 (de) * | 2001-06-29 | 2003-01-16 | Linde Ag | Hydraulische Steuereinrichtung |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014095240A1 (de) * | 2012-12-17 | 2014-06-26 | Jungheinrich Aktiengesellschaft | Hydraulische hubvorrichtung für ein batteriebetriebenes flurförderzeug |
DE102017131164A1 (de) | 2017-12-22 | 2019-06-27 | Linde Material Handling Gmbh | Hydraulisches Antriebssystem einer mobilen Arbeitsmaschine, insbesondere eines Flurförderzeugs |
Also Published As
Publication number | Publication date |
---|---|
EP1577257B1 (de) | 2009-01-14 |
DE102004011913A1 (de) | 2005-10-13 |
US20050198950A1 (en) | 2005-09-15 |
DE502005006449D1 (de) | 2009-03-05 |
EP1577257A3 (de) | 2005-09-28 |
US7181910B2 (en) | 2007-02-27 |
DE102004011913B4 (de) | 2005-12-29 |
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