EP4543798A1 - Chariot élévateur autonome de transport de charge et procédé associé - Google Patents
Chariot élévateur autonome de transport de charge et procédé associéInfo
- Publication number
- EP4543798A1 EP4543798A1 EP23736186.0A EP23736186A EP4543798A1 EP 4543798 A1 EP4543798 A1 EP 4543798A1 EP 23736186 A EP23736186 A EP 23736186A EP 4543798 A1 EP4543798 A1 EP 4543798A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- load
- detection
- forklift
- zone
- fork
- 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.)
- Pending
Links
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
- B66F9/063—Automatically guided
-
- 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
- B66F9/0755—Position control; Position detectors
-
- 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
- B66F9/24—Electrical devices or systems
Definitions
- TITLE Autonomous load transport forklift and associated method
- the present invention relates to the field of autonomous vehicles for the automated transport of loads, such as autonomous forklifts.
- Automated forklifts are an example of such vehicles and allow, for example, loading, transporting and positioning a load at height without human intervention.
- forklifts are conventionally equipped with mechanical sensors arranged on the vertical uprights of the fork used for lifting, transporting and depositing these loads.
- Such mechanical sensors are in the form of pivoting stops between an deployed position corresponding to a load absent or not resting against said stop, and a retracted position corresponding to a load resting against said stop.
- these mechanical sensors installed at the bottom of the apron do not make it possible to ensure when depositing a load that the deposit has been correctly carried out on the storage rack, nor to ensure when taking a load. load of the shelving that this socket has also been correctly carried out.
- the aim of the invention is therefore to propose an autonomous forklift capable of increasing the level of reliability and safety of load removal and pick-up operations from a storage rack.
- the subject of the invention is an autonomous forklift comprising a vertically movable fork provided with at least two arms for lifting loads, a drive system for moving the forklift, a control unit capable of controlling the operation of the drive system to autonomously guide the forklift and capable of controlling the vertical movement of the fork.
- the forklift further comprises a device for contactless detection of a load, said detection device being mobile together with the fork and arranged above the arms of said fork.
- the contactless detection device is capable of emitting a light beam scanning at least one predefined flat detection zone located above the arms to detect the presence or absence of a load.
- the forklift further comprises a means for determining a movement of the forklift. The determination means is able to acquire information representative of the movement of the forklift from a position of depositing or picking up a load of the forklift, said position being recorded by the control unit.
- control unit receives representative information from the determination means and information representative of the presence or absence of the load in said predefined flat detection zone from the contactless detection device.
- control unit is able to control the operation of the drive system and the vertical movement of the fork as a function of this information.
- the determination means comprises at least one rotary encoder capable of measuring the rotation of at least one wheel of the forklift.
- said predefined flat detection zone scanned by the light beam emitted by the contactless detection device is horizontal.
- said predefined flat detection zone scanned by the light beam emitted by the contactless detection device is located above the two arms.
- said detection zone plane can extend laterally at least partly beyond the transverse dimensions of said fork arms.
- the contactless detection device can scan two distinct flat detection zones, namely a first predefined flat detection zone located above a first arm of the fork and a second predefined flat detection zone located above. above a second arm of the fork different from the first.
- the fork comprises at least two uprights supporting the arms, the contactless detection device being arranged on one of the uprights.
- the autonomous forklift includes an on-board tracking device configured to acquire position data of the forklift and communicating with the control unit.
- the contactless detection device is separate from the location device.
- the determination means is separate from the location device.
- the location device forms the determination means.
- the automatically guided forklift can further comprise a stop placed on each of the uprights of the fork and pivotally mounted between a deployed position corresponding to a load absent or not resting against said stop and a retracted position corresponding to a load resting against said stop, the contactless detection device placed on said upright being located above the associated stop.
- the trolley is not equipped with these stops.
- the invention relates to a method of transporting and depositing a load by an autonomous forklift as described above.
- the transport and removal process includes:
- a step of reversing the forklift by a predetermined reversing distance which is controlled via information from the determination means
- the predefined flat clearance area may be located forward of the free end of the fork legs.
- the predefined flat clearance zone can be located at the rear of the free end of the fork arms, and the step of moving the forklift is triggered if the absence of load in said clearance zone is detected and if the sum of the forklift reversal values carried out from the set-down position is greater than the distance separating the free end of the fork arms from the part of said detection zone of the step which is located on the side of the detection device.
- the recoil of the forklift carried out during the recoil stages is of constant value.
- the steps of reversing the forklift are carried out continuously without stopping, said detection zones and said clearance zone being activated by the detection device successively according to the constant reversing value of the forklift.
- the invention also relates to a method of lifting and transporting a load by an autonomous forklift as described above.
- the lifting and transport process includes:
- the advancement of the forklift carried out during the advancement stages is of constant value.
- the stages of advancement of the forklift are carried out continuously without stopping, said detection zones and said gripping zone being activated by the detection device successively according to the advancement value constant of the forklift.
- the predefined flat detection zone is defined by four points delimiting a rectangle.
- said load detection step is carried out in a flat detection zone which is common to the arms of the fork. In another mode of implementation, said load detection step is carried out in two flat, distinct detection zones which are each specific to one of the two arms of the fork.
- FIG 1 is a perspective view of an autonomous forklift according to an exemplary embodiment of the invention.
- FIG 2 schematically illustrates the forklift of Figure 1 during its use
- FIG 4 illustrates the flowchart of a load transport and deposit method according to one mode of implementation of the invention
- FIG 5 is a partial top view of the forklift of Figure 1 on which is schematically represented a load detection zone contiguous to the previous load detection zone illustrated in Figure 3;
- FIG 6A] [Fig 6B] [Fig 6C] [Fig 6D] [Fig 6E] [Fig 6F] [Fig 6G] are partial top views of the forklift of Figure 1 on which detection zones are schematically represented successive and contiguous charges used in the process illustrated in Figure 4;
- FIG 6H is a partial top view of the forklift of Figure 1 on which is schematically represented a clearance zone used in the method illustrated in Figure 4;
- FIG 7 illustrates the flowchart of a lifting and load transport method according to one mode of implementation of the invention.
- FIG 8A] [Fig 8B] [Fig 8C] [Fig 8D] [Fig 8E] [Fig 8F] [Fig 8G] [Fig 8H] [Fig 81] are partial top views of the forklift of Figure 1 on which are schematically represented successive and contiguous charge detection zones used in the method illustrated in Figure 7; And
- FIG 8J is a partial top view of the forklift of Figure 1 on which is schematically represented a load handling area used in the method illustrated in Figure 7.
- Figure 1 shows the main elements of an autonomous forklift 1 according to one embodiment of the invention.
- the architecture of the forklift 1 is given as an example and does not limit the invention to the sole configuration of the architecture presented. It is understood that the invention also relates to forklifts intended to operate in manual mode and which have been adapted to allow a second mode of operation in autonomous mode.
- the autonomous forklift 1 illustrated in Figure 1 comprises a fork-carrying apron 3 provided with a fork 4 comprising two arms 4a, 4b spaced laterally and extending forward.
- the fork 4 also includes two uprights 4'a, 4'b each supporting one of the arms 4a, 4b.
- the arms 4a, 4b of the fork are generally used to insert into insertion tunnels provided in the transport pallets supporting the loads to be lifted.
- the uprights 4'a, 4'b make it possible to lift the arms 4a, 4b in order to be able to lift a pallet to be transported or another type of load and to be able to place or catch a pallet or another type of load at height.
- the fork 4 is capable of moving in translation in a vertical plane V defined by the fork-carrying apron 3, along a vertical mast 5 of the carriage.
- the uprights 4'a, 4'b can slide along the mast 5.
- the longitudinal axes of the arms 4a, 4b of the fork 4 are parallel. These longitudinal axes are oriented parallel to an axis horizontal X, and define a horizontal plane H called lifting plane.
- the arms 4a, 4b of the fork 4 are perpendicular to the vertical plane V.
- the arms 4a, 4b of the fork are also preferably movable laterally relative to each other.
- the arms of the fork 4 could be telescopic or retractable, and/or angularly orientable around their longitudinal axis.
- the carriage 1 is equipped with a drive system 7 allowing the movement of the carriage 1.
- the drive system comprises at least one electric or thermal motor (not shown) allowing the driving of the wheels 18 of trolley 1.
- the truck 1 is also equipped with an on-board location device 8, and an on-board control unit 9 (figure 2) receiving information from the location device 8 to autonomously control the movement of the forklift.
- an on-board control unit 9 (figure 2) receiving information from the location device 8 to autonomously control the movement of the forklift.
- the control unit 9 comprises the hardware and software means for controlling the operation of the drive system 7 as a function of the information received from the locating device 8.
- the control unit 9 also makes it possible to control the autonomous movement of the fork 4 .
- the cart 1 is further equipped with means 11 for determining a movement of the forklift 1, said determination means 11 being configured to acquire information representative of the movement of the cart 1 and to transmit it to the unit control 9.
- the determination means 1 1 comprises at least one rotary encoder capable of measuring the rotation of at least one wheel 18 of the forklift 1.
- the encoder is capable of determining the value of the displacement of the forklift 1 as a function of the detected number of revolutions of the associated wheel 18.
- the carriage 1 is also equipped with a contactless detection device 10 which is arranged above the arms 4a, 4b of the fork 4.
- the detection device 10 is fixed on the upright 4' a of the fork and is located above arms 4a, 4b.
- the contactless detection device 10 is mobile together with the upright 4'a of the fork.
- THE detection device 10 is distinct from the location device 8 and the determination means 11.
- the detection device 10 is capable of emitting a light beam scanning at least one predefined flat detection zone located above the arms 4a, 4b to detect the presence of a load at raise by intersection of the light beam by said load inside said predefined flat detection zone.
- the detection device 10 is configured to acquire position data of the load to be lifted, and to transmit to the control unit 9 information representative of the presence or absence of the load detected inside the predefined flat detection area. Depending on the information received, the control unit 9 then controls the operation of the drive system 7 and the vertical movement of the fork 4.
- the detection device 10 can for example be a laser sensor of the Lidar type.
- the control unit 9 controls the operation of the cart 1 to bring it closer to the rack 13 and the lifting of the arms of the fork 4 carrying the load to be deposited to position it relative to the rack 13.
- the cart 1 is controlled by the control unit 9 as a function of data from the location device 8.
- the carriage 1 is controlled to keep a minimum safety distance d relative to the shelving 13.
- the carriage 1 is controlled to keep a minimum horizontal safety distance between the overhanging end of the arms of the fork 4 and the shelving 13 in order to allow the safe passage of the arms of the fork 4 above the shelving 13.
- the control unit 9 can use the information transmitted by the determination means 1 1 to precisely control the movement of the carriage 1 in addition to the data from the location device 8.
- the detection device 10 emits a light beam 14 scanning at least one predefined flat detection zone 15a located above the arms 4a, 4b of the fork.
- the vertical projection of the detection zone 15 covers the arms 4a, 4b of the fork and the transverse space separating these arms.
- the detection zone 15a is defined by four distinct points delimiting a rectangle, such as points B, C, D and E in Figure 3.
- Point A schematically represents the emission point of the light beam 14 at the output of the device 10.
- the detection zone 15a is here horizontal. Alternatively, it could be possible to provide a zone 15a inclined relative to the horizontal.
- the long side of the rectangle delimited by points B, C, D and E has a length y greater than the transverse dimensions of the arms 4a, 4b of the fork, and the detection zone 15a is centered relative to these arms.
- the flat detection zone 15a extends laterally beyond the transverse dimensions of the arms 4a, 4b of the fork.
- the width w of the short side of the rectangle delimited by points B, C, D and E, and therefore the depth of the detection zone 15a can be equal to 50 mm.
- the detection device 10 is configured to detect whether the load 12 is inside the detection zone 15a.
- the charge 12 is detected by the device 10 as being present when it intersects the light ray 14 and it is inside the first detection zone 15.
- the detection device 10 is able to detect that the load is inside the first detection zone 15 by measuring the distance.
- the detection device 10 detects that the distance separating it from the load 12 is outside of the predefined flat detection zone 15, then the device 10 detects an absence of the load 12 in said detection zone.
- Process 20 is illustrated in Figure 4.
- the method 20 begins with step 21 of depositing the load 12, during which the control unit 9 controls the carriage 1 to reach a position of depositing the load. Once the carriage 1 has reached the position for depositing the load, the control unit 9 controls the movement of the arms 4a, 4b relative to the shelving 13 in order to deposit the load 12 there. During this phase, the control unit 9 controls the lowering of the load 12 above the rack 13 until the load 12 comes into contact with the part of the rack 13 intended to accommodate the load 12. The control unit 9 then continues the lowering of the arms 4a, 4b inducing a relative vertical movement between the arms 4a, 4b and the load 12 meaning that the latter is no longer in contact with the arms 4a, 4b and rests entirely on the shelving 13.
- the method 20 continues with a step 22 of recording the position of the forklift 1 in the load removal position as a reference position.
- the device 10 detects whether the load 12 is absent from the predefined plane detection zone 15a (FIG. 3).
- control unit 9 stops the carriage 1 in step 23' to allow it to be put in order by an operator.
- step 24 of retreat the control unit 9 controls the carriage 1 to move it back a predetermined distance away from the shelving 13 and the load 12.
- the distance back is of a predefined value, and can for example be equal to 50 mm.
- the control unit 9 controls the recoil of the carriage 1 via information from the determination means 11.
- the method 20 could include an additional step of reversing carried out before the detection step 23.
- the method continues with a load detection step 25 in which the device 10 performs load detection in a new zone 15b (figure 5) of predefined plane detection which is contiguous to the previous plane detection zone 15a by considering the axis of extension of the arms 4a, 4b of the fork.
- the predefined plane detection zone 15b is located on the side opposite the detection device 10 with respect to the previous plane detection zone 15a and has a lateral dimension w equal to the value of the recoil of the forklift 1 carried out in step 24 of retreat.
- the predefined plane detection zone 15b corresponds to the rectangle CC b D b D.
- the rectangles BCDE and CC b D b D have one of their large common sides, namely the CD side.
- the method 20 continues with a repetition
- step 24 of recoil and of step 25 of detection until the detection device 10 performs load detection in a zone 16 (FIG. 6H) of predefined flat clearance relative to the free end arms 4a, 4b of the fork.
- zone 16 of clearance relative to the free end of the arms 4a, 4b of the fork for example a zone which is further away from the free end of the arms 4a, 4b of the fork or even, a zone having a different width w.
- a new detection step is carried out in a new zone 15c ( Figure 6A ) of predefined plane detection contiguous to the previous plane detection zone 15b.
- the predefined plane detection zone 15c is located on the side opposite the detection device 10 with respect to the previous plane detection zone 15b and has a lateral dimension w equal to the value of the reversal of the forklift 1 which has just been carried out.
- control unit 9 stops the carriage 1 to allow it to be put in order by an operator. If the absence of the load in zone 15c is detected, process 20 continues.
- the backing steps of the forklift 1 are carried out continuously without stopping.
- the detection zones 15a to 15i and the clearance zone 16 are activated by the detection device 10 successively according to the constant recoil value of the forklift.
- control unit 9 stops the carriage 1 at step 26' to allow reordering by an operator.
- step 27 it could be possible to provide that the method passes to step 27 if the charge is present in the clearance zone 16 when the charge detection is carried out in this zone 16. With such mode of implementation, it is preferable to provide a greater spacing separating the free end of the arms 4a, 4b of the fork and the zone 16.
- the method 20 includes a load detection step in the clearance zone 16 which is located at the front of the arms 4a, 4b of the fork. As indicated previously, it could be possible to define another clearance zone 16.
- the clearance zone 16 could be defined as being at the rear of the free end of the arms 4a, 4b of the fork.
- the vertical projection of the clearance zone 16 is located on the arms 4a, 4b of the fork.
- step 27 the process proceeds to step 27 of moving the forklift if the load is absent from this zone 16 and if the sum of the values of recoil of the forklift carried out from the removal position is greater at the distance separating the free end of the arms 4a, 4b of the fork from the long side BE of the rectangle of the detection zone 15a.
- a single recording step is provided, i.e. reference taking step, of the position of the forklift in the position of depositing the load as a reference position.
- Process 30 is illustrated in Figure 7.
- the method 30 begins with the positioning step 31, during which the control unit 9 controls the carriage 1 to position the arms 4a, 4b relative to the shelving 13 in a position for taking the load 12. Before and during this step, the load 12 rests on the shelving.
- zone 17a corresponds to a predetermined zone which is located at the front of the arms 4a, 4b of the fork.
- zone 17a is defined by four points J, K, L and M delimiting a rectangle located at the front of the arms 4a, 4b of the fork.
- control unit 9 stops the carriage 1 at step 32' to allow it to be put in order by an operator.
- the method 30 continues with a step 33 of recording the position of the forklift 1 in the load detection position 12 as a reference position, then a step 34 d ' advancement.
- the control unit 9 controls the carriage 1 to advance it by a predetermined advancement distance while approaching the racking and the load.
- the value of this advancement is of a predefined value, and can for example be equal to 50 mm.
- the control unit 9 controls the advancement of the carriage 1 via information from the determination means 1 1.
- method 30 could include an additional advancement step carried out before reference taking step 33.
- the method 30 continues with a step 35 of detecting the load in which the detection device 10 performs load detection in a new zone 17b (Figure 8B) of predefined plane detection which is contiguous to the previous plane detection zone 17a by considering the axis of extension of the arms 4s, 4b of the fork.
- the predefined flat detection zone 17b is located on the side of the detection device 10 relative to the previous plane detection zone 17a and has a lateral dimension w equal to the value of the advancement of the forklift 1 carried out in the advancement step 34.
- the predefined plane detection zone 17b corresponds to the rectangle J b JMM b .
- the rectangles J b JMM b and JKLM have one of their large common sides, namely the JM side.
- control unit 9 stops the carriage 1, during step 35', to allow it to be put in order by an operator.
- the method 30 continues with a repetition 36 of the advancement step 34 and the detection step 35, until the detection device 10 produces a load detection in a predefined flat grip zone 18 relative to the vertical uprights of the fork which is illustrated in Figure 8J.
- the grip zone 18 corresponds to a predetermined zone which is located on the side of the vertical uprights of the fork and which is defined as being a safe load grip position.
- the grip zone 18 is defined by four points P, R, S and Q defining a rectangle located near the vertical uprights of the fork.
- the method 30 continues by repeating the advancement and detection steps.
- a new detection step is carried out in a new zone 17c (figure 8C) of predefined plane detection which is contiguous to the previous plane detection zone 17b.
- the predefined plane detection zone 17c is located on the side of the detection device 10 with respect to the previous plane detection zone 17b and has a lateral dimension w equal to the value of the advancement of the forklift 1 which has just been carried out . If the absence of the load in zone 17c is detected, the control unit 9 stops the carriage 1 to allow it to be put in order by an operator. If the presence of the charge in zone 17c is detected, process 30 continues.
- the advancement stages of the forklift 1 are carried out continuously without stopping.
- the detection zones 17a to 17i and the grip zone 18 are activated by the detection device 10 successively according to the constant advancement value of the forklift.
- control unit 9 stops the carriage 1 in step 36' to allow a restoration of order by an operator.
- step 37 in the control unit 9 lifts the load by issuing a lifting instruction.
- a single recording step is provided, i.e. reference taking step, of the position of the forklift in the load detection position as a reference position.
- the detection steps are carried out with detection zones of the detection device which are each common to the two arms 4a and 4b of the fork.
- a detection zone specific to it it could be possible to provide, at each detection step and for each of the arms 4a, 4b of the fork, a detection zone specific to it.
- the detection device emits a light beam scanning a detection zone specific to the arm 4a of the fork and located above this arm 4a, and a zone specific to the arm 4b, located at the -above this arm 4b and distinct from the detection zone specific to arm 4a.
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2206208A FR3137031A1 (fr) | 2022-06-22 | 2022-06-22 | Chariot élévateur autonome de transport de charge et procédé associé |
| PCT/FR2023/050866 WO2023247861A1 (fr) | 2022-06-22 | 2023-06-14 | Chariot élévateur autonome de transport de charge et procédé associé |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4543798A1 true EP4543798A1 (fr) | 2025-04-30 |
Family
ID=83280124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23736186.0A Pending EP4543798A1 (fr) | 2022-06-22 | 2023-06-14 | Chariot élévateur autonome de transport de charge et procédé associé |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4543798A1 (fr) |
| CN (1) | CN119403755A (fr) |
| FR (1) | FR3137031A1 (fr) |
| WO (1) | WO2023247861A1 (fr) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2181959B1 (fr) * | 2008-10-31 | 2017-03-01 | OM Carrelli Elevatori S.p.A. | Chariot de manutention |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6150938A (en) * | 1998-09-09 | 2000-11-21 | Sower; Forrest D. | Laser lighting assembly mounted on a forklift to project a light beam parallel to and in the same plane as a fork and utilized to accurately direct the fork into a fork receiving volume of a pallet, thereby avoiding any fork damage to a load on a pallet |
| US8538577B2 (en) * | 2010-03-05 | 2013-09-17 | Crown Equipment Limited | Method and apparatus for sensing object load engagement, transportation and disengagement by automated vehicles |
| US8965561B2 (en) * | 2013-03-15 | 2015-02-24 | Cybernet Systems Corporation | Automated warehousing using robotic forklifts |
-
2022
- 2022-06-22 FR FR2206208A patent/FR3137031A1/fr active Pending
-
2023
- 2023-06-14 EP EP23736186.0A patent/EP4543798A1/fr active Pending
- 2023-06-14 WO PCT/FR2023/050866 patent/WO2023247861A1/fr not_active Ceased
- 2023-06-14 CN CN202380048751.8A patent/CN119403755A/zh active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2181959B1 (fr) * | 2008-10-31 | 2017-03-01 | OM Carrelli Elevatori S.p.A. | Chariot de manutention |
Also Published As
| Publication number | Publication date |
|---|---|
| CN119403755A (zh) | 2025-02-07 |
| FR3137031A1 (fr) | 2023-12-29 |
| WO2023247861A1 (fr) | 2023-12-28 |
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