EP3219440B1 - Systeme adaptateur pour une machine de travail du sol, machine de travail du sol et outil associe - Google Patents

Systeme adaptateur pour une machine de travail du sol, machine de travail du sol et outil associe Download PDF

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Publication number
EP3219440B1
EP3219440B1 EP16160218.0A EP16160218A EP3219440B1 EP 3219440 B1 EP3219440 B1 EP 3219440B1 EP 16160218 A EP16160218 A EP 16160218A EP 3219440 B1 EP3219440 B1 EP 3219440B1
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EP
European Patent Office
Prior art keywords
adapter system
processing
receptacle
machining
fastening
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.)
Active
Application number
EP16160218.0A
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German (de)
English (en)
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EP3219440A1 (fr
Inventor
Marc Viebahn
Anis Saad
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.)
Visaatec GmbH
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Visaatec GmbH
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 Visaatec GmbH filed Critical Visaatec GmbH
Priority to EP16160218.0A priority Critical patent/EP3219440B1/fr
Priority to US15/458,308 priority patent/US10493587B2/en
Publication of EP3219440A1 publication Critical patent/EP3219440A1/fr
Application granted granted Critical
Publication of EP3219440B1 publication Critical patent/EP3219440B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/10—Single-purpose machines or devices
    • B24B7/18—Single-purpose machines or devices for grinding floorings, walls, ceilings or the like
    • B24B7/186—Single-purpose machines or devices for grinding floorings, walls, ceilings or the like with disc-type tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/02—Frames; Beds; Carriages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B45/00—Means for securing grinding wheels on rotary arbors
    • B24B45/003—Accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B45/00—Means for securing grinding wheels on rotary arbors
    • B24B45/006—Quick mount and release means for disc-like wheels, e.g. on power tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
    • B24D7/06—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor with inserted abrasive blocks, e.g. segmental
    • B24D7/066—Grinding blocks; their mountings or supports

Definitions

  • the present invention relates to a processing segment for an adapter system of a soil working machine, an adapter system, a soil working machine and a tool for use with an adapter system according to the invention and / or a soil working machine according to the invention.
  • Such floor cultivation machines are mostly designed as floor grinding machines and are usually used for surface treatment of floors. With such soil working machines, for example, concrete, asphalt, natural stone or other soil surfaces are ground, polished or otherwise surface-worked.
  • Floor grinding machines are also used to recondition the floor surface, for example to remove glue residue, filler residue, etc.
  • the soil cultivation machine has a drive shaft to which a grinding tool is attached.
  • the grinding tool has a carrier plate with a largely flat processing side facing the soil to be processed, which is set in rotation by the drive shaft.
  • the statements “axial” and “radial” used below relate to the longitudinal extension of the drive shaft or to the axis of rotation of the carrier plate or a component comparable to it.
  • the entire grinding tool is usually dismantled and replaced.
  • this is extremely complex, since the grinding tool is usually secured to a corresponding fastening section of the drive shaft with several screws.
  • the processing surface is firmly connected to the carrier plate so that the entire unit has to be disposed of or recycled. This is not in keeping with the times, not least for reasons of sustainability and environmental protection.
  • the carrier plates of the grinding tools have a diameter of 230 mm, 270 mm, for example, 280 mm or 400 mm, so that a wholesaler has to keep a large number of such grinding tools in stock.
  • the storage area required for this is accordingly large.
  • several of these grinding tools must also be kept available during the processing time in order not to lengthen the processing times due to extended downtimes of the soil cultivating machine.
  • WO 2007/072273 A2 discloses a soil working machine with a grinding tool.
  • the grinding tool has a base plate, a releasable connecting element, a carrier, a membrane, a mat and diamond tools attached thereto.
  • a variant is also shown in which several grinding inserts are attached to the base plate.
  • the solutions shown still have disadvantages in terms of manageability and flexibility.
  • the adapter system according to the invention can be attached to a soil cultivating machine.
  • the adapter system is distinguished from the adapter systems known from the prior art in that the adapter system has a receiving side with at least one receptacle, the receptacle having several second fastening elements for the detachable fastening of one Has machining segment in the recording.
  • This has the advantage that, on the one hand, no great effort is required for replacing a machining segment.
  • the manageability is significantly improved, since the entire adapter system in the sense of a carrier plate with a processing surface fixed on it is not exchanged. Rather, the adapter system remains on the soil cultivation machine and only the cultivation segment, which is significantly smaller in size, is replaced if necessary.
  • the second fastening element has a spring unit. It can thus be ensured that the at least one processing segment received in the at least one receptacle can adapt to unevenness in the floor due to the floating mounting. Furthermore, this also prevents the machining surface from being subject to increased wear due to excessive contact pressure.
  • the spring unit can also be designed as a damper unit or in combination with such, without this being a disadvantage for the processing result.
  • the second fastening element has at least one torsionally rigid second connecting means for non-positive and / or positive fastening of the machining segment.
  • the second connecting means is a hook and loop means.
  • the complementary Velcro is arranged on the processing segment. The processing segment can thus be fastened to the adapter system with reduced effort by placing the processing segment on or off the adapter system essentially in the axial direction, without the need for further fastening work, as would be the case, for example, when tightening or loosening a screw.
  • the spring unit is a composite component.
  • a composite component should be understood to mean a component that has a metal part and a plastic part that is inseparably connected to the metal part.
  • the plastic part is a foamed plastic.
  • the foamed plastic or its material properties are selected so that the desired resilience of the machining segment is achieved.
  • the result is a sandwich-like structure, at least consisting of a plastic part, a metal part and a second connecting means, preferably in the order mentioned.
  • the spring unit or a further spring unit is arranged on the processing segment if this is necessary for the intended use.
  • the plastic part is arranged between two metal parts in order to achieve a particularly stable fastening.
  • the adapter system is expediently designed in the shape of a disk, in particular a circular disk, the adapter system having a plurality of receptacles, preferably arranged in a circle on the receiving side, for receiving machining segments. It has been shown that it is particularly advantageous if the receptacles have an area proportion of 25% to 50%, in particular from 30% to 45% and particularly advantageously from 35% to 40% of the receiving area, so that a a particularly good machining result is achieved since the machining surfaces of the machining segments arranged in the receptacles make up an equal proportion of the surface area. In this context it is advantageous if the receptacles are arranged essentially along the circumference of the adapter system.
  • the receptacles are arranged only along the circumference, that is to say lying on the outside in the radial direction with respect to the axis of rotation of the adapter system. It has been shown that with receptacles arranged relatively close to the axis of rotation of the adapter system, an uneven loading of the machining segments arranged in the receptacles can occur. On the one hand, this can lead to uneven wear of the machining segments. On the other hand, this can also result in a heterogeneous machining result which, under certain circumstances, is further worsened by the uneven wear.
  • the at least one receptacle has at least one delimiting wall, the delimiting wall extending in the axial direction from the receiving side of the adapter system.
  • the boundary wall is designed so that a processing segment arranged in the receptacle is arranged at least during operation of the soil cultivating machine essentially within the receptacle or in the axial direction inwardly with respect to the boundary wall, the processing surface of the processing segment being axially separated from the boundary wall protrudes. This can prevent a machining segment from migrating - for example due to the centrifugal forces that occur.
  • the boundary wall is designed in such a way that it does not come into contact with the soil to be worked even when the spring unit is acted upon during operation of the soil cultivation machine with an axially inwardly acting force. It is also conceivable that during operation the machining segment displaces the axially inwardly acting force against the spring force of the spring unit in such a way that the machining segment is only then prevented from migrating by the boundary wall.
  • the boundary wall has at least one tool opening for receiving a tool.
  • the tool can be introduced in order to remove a machining segment received in the receptacle quickly and largely without effort.
  • the adapter system has at least one processing segment according to the invention, the at least one processing segment being fastened in the at least one receptacle. It has been shown that a particularly good machining result is achieved if preferably several machining segments are fastened in several receptacles, in particular if six receptacles are provided in a circular arrangement along the circumference of the adapter system.
  • the machining segment preferably has a base body with a machining side and a fastening side.
  • the fastening side is arranged on the side of the base body opposite the machining side.
  • the fastening side has according to the invention, at least one first fastening element for releasably fastening the machining segment to the adapter system, the machining side being designed as a closed machining surface
  • the processing segment has two sides, the processing segment being attachable to an adapter system with the attachment side.
  • the processing surface is designed to be completely closed, that is to say without openings, receptacles or holes for locking means such as screws or the like. In this way, the effectively available machining area is increased, so that overall a longer useful life of the machining segment can be achieved.
  • the machining segment according to the invention consists essentially only of a base body with a fastening side and a machining side, so that in the event of an exchange, only the individual machining segment has to be exchanged.
  • the adapter system which takes on the function of the carrier plate, remains firmly connected to the soil cultivation machine and does not have to be laboriously dismantled or disposed of.
  • the first fastening element has at least one torsionally rigid first connection means for positively and / or non-positively fastening the machining segment.
  • the first connecting means is a hook and loop means.
  • the complementary Velcro is arranged on the adapter system.
  • the processing segment can thus be fastened to the adapter system with reduced effort by placing the processing segment on or off the adapter system essentially in the axial direction without the need for further fastening work (such as tightening or loosening screws).
  • the processing surface can thus also extend over the entire processing side facing the floor during operation, since no openings or the like are necessary for receiving screws, for example. Rather, the first connecting means designed as Velcro does not have to be accessible with a tool or the like for fastening.
  • the base body is expediently designed in the form of a disk, in particular a circular disk.
  • the base body has a diameter of 60 mm to 150 mm, advantageously 80 to 130 mm and in particular 100 mm. This results in a sufficiently large processing area with simultaneously reduced space requirements. Overall, this results in particularly good manageability of the individual processing segment.
  • the machining surface has metal-bonded and / or diamond-bonded and / or plastic-bonded grinding structures.
  • a suitable processing segment can be selected in order to achieve an optimal processing result while at the same time reducing the amount of dust.
  • the object is also achieved with a soil cultivating machine according to claim 13, which has an adapter system according to the invention.
  • the floor working machine is a floor grinding machine.
  • a tool is proposed according to the invention, the tool being used for use with an adapter system according to the invention and / or a soil cultivating machine according to the invention.
  • the tool has a nose and a lever shaft, the nose being insertable between the receiving side of the adapter system and the fastening side of the machining segment in such a way that the machining segment can be removed from the holder by moving the lever shaft relative to the adapter system.
  • a machining segment fastened in the receptacle can be removed quickly from the receptacle by moving the lever shaft with little effort, for example if a wear-related replacement is due.
  • a machining segment 1 which has a circular disk-shaped base body 2 with a machining side 3 and a fastening side 4 (cf. Fig. 2 ) having.
  • the processing side 3 is arranged on one side of the base body 2
  • the fastening side 4 is arranged on the other side of the base body 2 opposite the processing side 3.
  • the fastening side 4 has a first fastening element 6.
  • the fastening element 6 has a torsionally rigid first connecting means 7, which is also essentially in the form of a circular disk and largely covers the fastening side 4, as in FIG Fig. 2 shown.
  • the first connecting means 7 is a Velcro means which enables a rotationally rigid fastening.
  • the machining side 3 is shown as a closed machining surface 5.
  • the machining surface 5 has grinding structures 8 which extend in the axial direction from the machining side 3.
  • four centrally arranged octagonal grinding structures 8 are provided, as well as four further polygonal grinding structures 8 arranged on the circumference of the machining segment 1.
  • FIG Figure 1B Another exemplary embodiment for a machining segment 1 according to the invention is shown in FIG Figure 1B shown. This differs from the one in Figure 1A embodiment shown only in the shape and the arrangement of the grinding structures 8. As in Figure 1B shown, the grinding structures 8 can also be designed in the shape of a round cylinder. The grinding structures 8 can be designed as metal-bonded, diamond-bonded and / or plastic-bonded grinding structures 8. Depending on which type of soil cultivation is to be carried out, suitable cultivation segments 1 are selected and attached to an adapter system 10, as will be explained in more detail below.
  • FIG. 3 shows the adapter system without second fastening elements 13
  • Fig. 4 shows the adapter system 10 with second fastening elements 13
  • Fig. 5 shows the adapter system 10 with processing segments 1 attached thereto.
  • the adapter system 10 is designed in the shape of a circular disk.
  • the adapter system 10 has a receiving side 11 with several receptacles 12 for receiving machining segments 1 (cf. Fig. 5 ).
  • the adapter system 10 has six receptacles 12 which are arranged in a circle at regular intervals along the circumference U of the adapter system 10.
  • each receptacle 12 has four second fastening elements 13.
  • the fastening elements 13 have the same structure, are designed as round cylinders and are arranged uniformly within the receptacle 12.
  • a cut-free second fastening element 13 is shown in side view.
  • the fastening element 13 has a torsionally rigid second connecting means 14.
  • the second The connecting means 14 extends essentially parallel to the receiving side 11 of the adapter system 10.
  • the second connecting means 14 is a Velcro means which is complementary to the first connecting means 6, which is also designed as a Velcro means.
  • Other torsionally rigid connection means 6 and 14 are also conceivable, for example in the form of a bayonet lock or the like.
  • the second fastening element 13 also has a spring unit 15.
  • the spring unit 15 is a composite component which has a metal part 16 and a plastic part 17.
  • the metal part 16 is designed in the shape of a circular disk and is arranged between the second connecting means 14 and the plastic part 17.
  • the plastic part 17 is a plastic foam part with certain elastic properties that define the resilience or damping behavior of the spring unit 15.
  • the second fastening element 13 has a central through hole 20 for receiving a locking means (not shown in detail).
  • the second fastening element 13 can be fixed to the receptacle 12 of the adapter system 10 via a corresponding locking means receptacle 21.
  • the receptacles 12 of the adapter system 10 also have boundary walls 18.
  • the boundary walls 18 extend in the axial direction from the receiving side 11 of the adapter system 10 and form an essentially circular delimitation of the seat 12.
  • the boundary walls 18 each have two openings 19 per seat 12.
  • the openings 19 point radially outward and are arranged along the circumference U of the adapter system 10.
  • the openings 19 serve to accommodate a tool 100, as will be explained in more detail below.
  • the boundary walls 18 of the individual receptacles 12 are connected to one another with stiffening ribs 22, which likewise extend in the axial direction from the receptacle side 11 of the adapter system 10 and stabilize the adapter system 10 in themselves.
  • stiffening ribs 22 are arranged in a star shape, pointing radially inward.
  • two arcuate stiffening ribs 22 running in the direction of the circumference U of the adapter system 10 are arranged between the individual receptacles 12.
  • the machining segments 1 are inserted in the axial direction into the corresponding receptacle 12 until the first connecting means 7 of the machining segment 1 comes into contact with the second connecting means 14 of the receptacle 12 of the adapter system 10.
  • the machining segment 1 is then releasably fastened in the receptacle 12 by applying slight pressure in the axial direction. Since the first connecting means 6 almost completely covers the fastening side 4 of the machining segment 1 (see FIG Fig. 2 ), the orientation of the machining segment 1 relative to the receptacle 12 is irrelevant.
  • FIG Fig. 7 Tool 100 shown to use.
  • the tool 100 has a nose 101 and a lever shaft 102.
  • the nose 101 is connected to the lever shaft 102 via a curved transition piece 103.
  • the nose 101 is designed such that it can be introduced into the receptacle 12 through an opening 19 of a delimiting wall 18 of a receptacle 12, as shown in Fig. 8 is shown.
  • the nose 101 is arranged in the axial direction between the receiving side 11 of the adapter system 10 and the fastening side 4 of the machining segment 1.
  • the tool 100 tilts in the area of the rear edge of the nose 101, so that the nose 101 is displaced in the direction of the fastening side 4 of the machining segment 1.
  • the nose 101 contacts the fastening side 4 of the machining segment 1 and presses the machining segment 1 in the axial direction out of the receptacle 12.
  • the connection between the first fastening element 6 of the machining segment 1 and the four second fastening elements 13 of the receptacle 12 is released and the machining segment 1 can be lifted from the adapter system 10.
  • a second embodiment of the adapter system 10 according to the invention is shown.
  • the adapter system 10 shown differs from the adapter system described above in that the receptacle 12 has only one second fastening element 13a.
  • the second fastening element 13a shown in this figure is constructed essentially the same as that in FIG Fig. 6 second fastening element 13 shown, that is to say with a spring unit 15 designed as a composite component. Since the second fastening element 13a according to FIG Fig. 9 largely completely fills the receptacle, the second fastening element 13 has two incisions 23 for receiving the nose 101 of the tool 100.
  • the tool 100 is shown by way of example, the nose 101 being received within an incision 23.
  • the nose 101 extends through the opening 19 and is arranged between the receiving side 11 of the adapter system and the machining side 4 of the machining segment 1 (not shown).
  • a soil cultivating machine 200 is shown.
  • the floor processing machine 200 is a floor grinding machine and has an adapter system 10 according to the invention with six processing segments 1 according to the invention attached to it.
  • the drive shaft (not shown) of the soil cultivating machine 200 sets the adapter system 10 and the processing segments 1 fastened thereon in a rotationally rigid manner in rotation so that the surface is processed, in particular removed in layers by the grinding structures 8. Due to the floating mounting of the machining segments 1 generated by the spring units 15, an optimal machining result is achieved.

Claims (14)

  1. Système adaptateur (10) pour machine (200) de travail du sol, ledit système adaptateur (10) étant apte à être fixé audit machine (200) de travail du sol, et ledit système adaptateur (10) comprenant une face de logement (11) comportant au moins un logement (12), caractérisé en ce que ledit logement (12) comprend plusieurs deuxièmes éléments de fixation (13) pour fixer de façon amovible un segment de travail (1) dans ledit logement (12), et le deuxième élément de fixation (13) comprend une unité élastique (15).
  2. Système adaptateur (10) selon la revendication 1, caractérisé en ce que ledit deuxième élément de fixation (13) comprend au moins des deuxièmes moyens de raccord (14) solidaires en rotation pour une fixation à engagement non-positif et/ou à engagement positif dudit segment de travail (1).
  3. Système adaptateur (10) selon la revendication 1 ou 2, caractérisé en ce que ladite unité élastique (15) est un composant composite (16, 17).
  4. Système adaptateur (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que ledit système adaptateur (10) est réalisé en forme de disque, en particulier en forme de disque circulaire, ledit système adaptateur (10) comprenant plusieurs logements (12), qui sont de préférence disposés de façon circulaire sur la face de logement (11), pour recevoir des segments de travail (1).
  5. Système adaptateur (10) selon la revendication 4, caractérisé en ce que lesdits logements (12) sont disposés sensiblement le long de la périphérie (U) dudit système adaptateur (10).
  6. Système adaptateur (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que ledit au moins un logement (12) comprend au moins une paroi de délimitation (18), ladite paroi de délimitation (18) s'étendant en direction axiale depuis la face de logement (11) du système adaptateur (10).
  7. Système adaptateur (10) selon la revendication 6, caractérisé en ce que ladite paroi de délimitation (18) comprend au moins une percée d'outil (19) pour recevoir un outil (100).
  8. Système adaptateur (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que ledit système adaptateur (10) comprend au moins un segment de travail (1), ledit au moins un segment de travail (1) étant fixé dans ledit au moins un logement (12) du système adaptateur (10), ledit segment de travail (1) comprenant un corps de base (2) comportant une face de travail (3) et une face de fixation (4), la face de fixation (4) étant disposé sur la face opposée à la face de travail (3) du corps de base (2), la face de fixation (4) comportant au moins un premier élément de fixation (6) pour attacher un segment de travail (1) audit système adaptateur (10) de façon amovible, et la face de travail (3) étant réalisée en forme d'une surface continue (5).
  9. Système adaptateur (10) selon la revendication 8, caractérisé en ce que ledit premier élément de fixation (6) comprend au moins des premiers moyens de raccord (7) solidaires en rotation pour une fixation à engagement non-positif et/ou à engagement positif dudit segment de travail (1).
  10. Système adaptateur (10) selon la revendication 8 ou 9, caractérisé en ce que ledit corps de base (2) est réalisé en forme de disque, en particulier en forme de disque circulaire.
  11. Système adaptateur (10) selon la revendication 10, caractérisé en ce que ledit corps de base (2) a un diamètre de 60 mm à 150 mm, avantageusement de 80 mm à 130 mm, et en particulier de 100 mm.
  12. Système adaptateur (10) selon l'une quelconque des revendications 8 à 11, caractérisé en ce que ladite surface continue (5) comprend des structures abrasives à liant en métal, en diamant et/ou en matière plastique.
  13. Machine (200) de travail du sol comprenant un système adaptateur (10) selon l'une quelconque des revendications précédentes, ladite machine (200) de travail du sol étant en particulier une ponceuse de sol.
  14. Outil (100) comprenant un système adaptateur (10) selon l'une quelconque des revendications 1 à 12 ou une machine (200) de travail du sol selon la revendication 13, ledit outil (100) comprenant un nez (101) et un tige de levier (102), ledit nez (101) étant apte à être introduit entre la face de logement (11) du système adaptateur (10) et la face de fixation (4) du segment de travail (1) de manière qu'on peut enlever le segment de travail (1) depuis le logement (12) en mouvant ledit tige de levier (102) par rapport audit système adaptateur (10).
EP16160218.0A 2016-03-14 2016-03-14 Systeme adaptateur pour une machine de travail du sol, machine de travail du sol et outil associe Active EP3219440B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP16160218.0A EP3219440B1 (fr) 2016-03-14 2016-03-14 Systeme adaptateur pour une machine de travail du sol, machine de travail du sol et outil associe
US15/458,308 US10493587B2 (en) 2016-03-14 2017-03-14 Processing section for a floor-processing machine, adapter system for a floor-processing machine, floor-processing machine and tool therefor

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Application Number Priority Date Filing Date Title
EP16160218.0A EP3219440B1 (fr) 2016-03-14 2016-03-14 Systeme adaptateur pour une machine de travail du sol, machine de travail du sol et outil associe

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EP3219440A1 EP3219440A1 (fr) 2017-09-20
EP3219440B1 true EP3219440B1 (fr) 2020-12-30

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EP3219440A1 (fr) 2017-09-20
US10493587B2 (en) 2019-12-03
US20170259391A1 (en) 2017-09-14

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