EP1970160B1 - Machine de traitement des planchers - Google Patents

Machine de traitement des planchers Download PDF

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Publication number
EP1970160B1
EP1970160B1 EP07103958A EP07103958A EP1970160B1 EP 1970160 B1 EP1970160 B1 EP 1970160B1 EP 07103958 A EP07103958 A EP 07103958A EP 07103958 A EP07103958 A EP 07103958A EP 1970160 B1 EP1970160 B1 EP 1970160B1
Authority
EP
European Patent Office
Prior art keywords
machining
transmission
tool
discs
carrier plate
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.)
Not-in-force
Application number
EP07103958A
Other languages
German (de)
English (en)
Other versions
EP1970160A1 (fr
Inventor
Kåre Kilgren
Håkan Thyssell
Johan Sunesson
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.)
HTC Sweden AB
Original Assignee
HTC Sweden AB
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 HTC Sweden AB filed Critical HTC Sweden AB
Priority to AT07103958T priority Critical patent/ATE458584T1/de
Priority to EP07103958A priority patent/EP1970160B1/fr
Priority to DE602007004942T priority patent/DE602007004942D1/de
Priority to PCT/SE2008/050251 priority patent/WO2008111902A1/fr
Priority to AU2008225212A priority patent/AU2008225212A1/en
Publication of EP1970160A1 publication Critical patent/EP1970160A1/fr
Application granted granted Critical
Publication of EP1970160B1 publication Critical patent/EP1970160B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B24B41/04—Headstocks; Working-spindles; Features relating thereto
    • B24B41/047—Grinding heads for working on plane surfaces

Definitions

  • the present invention relates to a tool for machining floors, as per the preamble of claim 1.
  • a tool for machining floors as per the preamble of claim 1.
  • An example of such a tool is disclosed by US 2 171 060 A .
  • machining appliance which carries one or more rotatably mounted plates that in turn carries one or more machining elements, e.g. in the form of discs that are smaller than the carrier plates and adapted to be rotated in relation to the carrier plates for machining the surface.
  • This machining disc contacts the floor surface by means of different types of cutters/bits while performing a movement in a plane in parallel to the rotating carrier plates, so that a machining of the surface is produced.
  • the machine is provided with a machining tool having three overlapping machining devices, i.e. the machining area of the devices overlaps in at least one direction of driving.
  • Each of these machining devices comprises one carrier plate with one or more associated machining discs.
  • the applicant has machines for machining floors with for example three, four or more machining discs per carrier plate arranged with one front machining device and two machining devices placed adjacent each other following behind the first one in the direction of movement, the first one being arranged between the other two, in a similar way as a shaving apparatus with three in a triangular pattern arranged cutting units, as e.g. sold by Philips®, so that the machining of the first machining device is performed in the area that is not machined by the following two devices, in an overlapping manner.
  • a disadvantage of these known tools for machining of floor surfaces is that three machining devices are to be used when machining a surface in an overlapping manner, whereby a complicated tool have to be manufactured.
  • These prior art tools also have a disadvantage in that the machines become heavy and therefore are difficult to handle and also have to be designed with rugged constructions due to the fact that these machines have long overhanging tools at the front demanding very sturdy and complicated suspension and frame structures.
  • these prior art machines require separate lifting devices, i.e. one for each machining device in the tool, and also more dust-extractor hoods, one for each machining device in the tool, which hoods also must be configured with complicated shapes.
  • the known tools with three machining devices also occupy a large space, especially when machining of floor surfaces is to be performed in narrow spaces and passages, making the handling and driving of the machine difficult.
  • An object of the invention is therefore to provide an improved machining tool, which eliminates or at least reduces the disadvantages for prior art machining tools.
  • a tool for machining floors comprising at least two rotatably mounted carrier plates driven during use and arranged adjacent each other, wherein each plate in turn is adapted to carry at least one rotatably mounted machining disc rotary driven during machining.
  • the machining discs are arranged such that their machining areas are able to overlap when the discs are driven, and the rotation of the two carrier plates are operatively synchronized such that the overlapping machining discs are able to rotate in a non-colliding manner when machining the floor.
  • the rotary synchronization of the two carrier plates is achieved by means of a transmission interconnecting the plates.
  • a respective motor is associated with each of the carrier plates.
  • the transmission comprises wheels, at least one wheel for each carrier plate, whereby each wheel is fixedly coupled to its associated carrier plate and rotatably interconnected by means of a loop, which loop is able to synchronize the rotation of the wheels in relation to each other such that the rotation of the carrier plates and the machining discs is synchronized.
  • the transmission is a belt drive, a chain drive, a gear train, a V-belt drive, or a synchronous belt drive, or any other suitable transmission that may be used for the inventive synchronization.
  • the transmission comprises at least one tension wheel for tightening the transmission.
  • the transmission in yet another embodiment comprises two tension wheels for tightening the transmission.
  • each carrier plate is carrying at least two rotatably mounted machining discs that are rotary driven during machining., which, in another embodiment, is carrying three rotatably mounted machining discs. Moreover, in yet another embodiment, each carrier plate is carrying four rotatably mounted machining discs.
  • the tool comprises at least three rotatably mounted carrier plates provided thereon.
  • the transmission interconnecting the two carrier plates is driven directly by at least one separate power source, and, in another embodiment, the transmission interconnecting the two carrier plates is driven by the carrier plates, and, in yet another embodiment, the transmission is a third transmission interconnecting the two carrier plates, which third transmission is driven indirectly by at least one motor that firstly drives the at least one machining disc on each carrier plate via a first transmission, whereby the at least one machining disc in turn drives its carrier plate by means of a second transmission, such that the carrier plates drives the third transmission.
  • the invention also concerns a machine for machining floors, comprising at least one tool in accordance with any of the embodiments defined above.
  • Providing a machine for machining stone or concrete floors with a tool for this, which tool comprises at least two machining devices of which each carries at least one machining disc being arranged with overlapping machining areas and rotary synchronized such that they do not collide when rotating during machining of the surface means that the machining discs machines the floor surface without leaving any unmachined area between them, so that the machine for grinding the floor surface is made more compact, lighter, and less complicated as the machining devices forming the tool are arranged as close as possible to each other to provide the overlapping machining areas such that the overall size of the floor grinding machine is minimized, the overhang of the tool is minimized, whereby the suspension and associated components may be optimized compared to prior art machines, and that the tool according to the invention may be equipped with any number of machining devices, e.g. three, four, five or more, without requiring the same sturdiness and complexity as prior art machines.
  • the inventive tool makes the machine according to the invention easier to handle and maintain reducing, consequently, costs associated therewith
  • Fig. 1 indicates a machine for machining surfaces on floors, preferably having concrete or stone as a wearing layer, with an abrading, machining or grinding tool 10 with at least two rotating plates 20a, 20b or more, which are mounted rotatably and adapted for machining of surfaces by means of at least one surface contacting machining disc 30, which is driven by a power source, e.g. a motor 11, as is explained in more detail in for example the patent publication WO 94/08752 .
  • the floor grinding machine comprises two motors 11, each motor separately rotating one or more, in this embodiment, three machining discs 30 via a first belt transmission (not shown in this application).
  • Each disc 30 has a rotational axis protruding upwards towards the motors for operative engagement with a second belt transmission (not shown in this application) that drives each carrier plate 20a, 20b separately with a lower rotative speed in relation to the discs.
  • This prior art machine has no synchronization between the two carrier plates 20a, 20b, which disadvantage is eliminated by the invention by providing the machine according to the invention with carrier plates 20a, 20b placed adjacent, in a preferred embodiment close, to each other and machining discs 30 that are arranged along the periphery of each carrier plate such that the disc machining areas overlap when the discs are rotary driven, and the rotation of the two carrier plates 20a, 20b are operatively synchronized such that the overlapping machining discs 30 rotate in a non-colliding manner when machining the floor.
  • This inventive synchronization of the carrier plates 20a, 20b may in one embodiment be done by indirect use of the existing motors 11 for rotative powering of the carrier plates or in another embodiment be done by use of a separate motor 12 that directly actuates and controls the synchronization, the motors 11, 12 preferably being electrically driven.
  • the floor surfaces may be stone, concrete, different types of asphalt, or different types of coatings on these surfaces, e.g. epoxy lacquers/resins/adhesives, plastic materials (e.g. plastic mats), paint, lacquer, or any other type of floors and coatings.
  • the machine according to the invention may also be used for cleaning and polishing floor surfaces by using cleaning and/or polishing pads instead of machining elements, e.g. TWISTER®-pads.
  • machining elements 31 On the rotatable plates 20a, 20b a suitable number of machining, i.e. grinding discs 30 may be attached, which discs are provided with detachably attached machining elements 31, which elements are positioned according to a predetermined and known pattern, i.e.
  • each machining disc is rotated substantially in a plane parallel to the surface to be machined and the planes of the carrier plates 20a, 20b in a known way and by means of known driver means as explained earlier.
  • Each carrier plate 20a, 20b, as shown in the embodiment of Figs. 1-5 supports three machining discs 30, which may be of any kind, e.g. as disclosed in EP-1 321 233 and/or WO 2004/108352 .
  • the tool 10 according to the invention for machining floors comprises two or more rotatably mounted carrier plates 20a, 20b, which are driven during use and arranged adjacent each other, and, in one embodiment, arranged side by side, but, preferably, sufficiently close to each other.
  • Each rotary plate 20a, 20b in turn carries three rotatably mounted machining discs 30, which are rotary driven during machining of the floor surface.
  • the machining discs 30 are arranged along the periphery of each carrier plate such that the disc machining areas overlap when the discs are rotary driven, and the rotation of the two carrier plates 20a, 20b are operatively synchronized such that the overlapping machining discs 30 rotate in a non-colliding manner when machining the floor.
  • the machining discs 30 are in this embodiment with three discs per carrier plate 20a, 20b arranged in a triangular pattern and spaced apart angularly about 120°, if four or more discs are used, this angular spacing may be 90° for four discs or 72° if five discs are used or any other suitable angular spacing may be used, around the periphery of the carrier plates 20a, 20b, depending on the number of machining discs.
  • These machining discs 30 may in another embodiment be arranged with their periphery extending more or less beyond and outside the periphery of the associated carrier plate 20a, 20b, i.e. at least partly outside the plane of the carrier plates when viewed perpendicularly to the carrier plate plane, such that the discs 30 on one carrier plate 20a extend over the adjacent carrier plate or plates 20b, at least partly.
  • the overlapping machining areas for the machining discs 30 in an embodiment are achieved in that the carrier plates 20a, 20b are arranged side by side with their rotational axes spaced apart in parallel with a distance D being close to the diameter of each plate 20a, 20b, i.e. only a small gap G exists between the carrier plate peripheries or contours as shown in Fig. 3 .
  • the distance D is defined when dimensioning the machine and the gap G is optimized in relation to this, i.e. these parameters may be freely chosen for fulfilling the requirements of each machine and application, but should of course, within limits, be as small as possible.
  • This arrangement in combination with the machining disc peripheries protruding with a distance P beyond the circle contour or swept area of the two carrier plates when the plates are rotated, this distance P being bigger than the gap G, means that the discs 30 on one carrier plate, e.g. the left carrier plate 20a in Figs. 1-3 and 5 , is moved in a path that lets these left discs, at least partly, sweep over the same area as the other discs on the other carrier plate, i.e. the right discs and the right carrier plate 20b in Figs. 1-3 and 5 , whereby the machining area of the left discs and the right discs (see Figs. 3 and 5 ) overlap at an intermediate area.
  • the carrier plates 20a, 20b have their axes around which they rotate aligned with shafts on their electrical motors 11 shown in Fig. 1 .
  • the plates have their axes aligned horizontally, but, in other embodiments, they may be arranged in a straight but somewhat skew alignment, i.e. one plate 20a may be placed a distance from the other plate in relation to the horizontal direction as shown in Figs. 3 and 4 or as seen in the direction of movement for the floor grinding machine shown as a two-directional arrow in Fig. 5 .
  • the rotary synchronization of the two carrier plates 20a, 20b is achieved by means of a transmission 40 interconnecting the two carrier plates.
  • the transmission comprises wheels, gears or pulleys 40a, 40b, i.e. at least one wheel, gear or pulley for each carrier plate 20a, 20b, whereby each wheel, gear or pulley is fixedly coupled to its associated carrier plate and rotatably interconnected by means of a loop 41, which loop is able to synchronize the rotation of the wheels, gears or pulleys in relation to each other such that the rotation of the carrier plates and the machining discs 30 is synchronized as explained above.
  • the transmission 40 may be a belt drive, a gear train or a chain drive. If the transmission is a belt drive, the belt may be a V-belt 41 or a synchronous belt 41, i.e. a toothed belt.
  • the transmission also comprises at least one tension wheel, gear, pulley or jockey 42 for tightening the transmission, i.e. the belt or the chain such that any slack for the loop and/or skidding between the loop 41 and the wheels, gears, or pulleys 40a, 40b is eliminated or at least minimized.
  • the transmission 40 comprises two tension wheels, gears, or pulleys 42 for tightening the transmission.
  • the pulleys 40a, 40b are fixedly coupled to the carrier plates 20a, 20b by means of a key joint, a splined coupling, screw joint, force or shrinkage fit so that a rotation of one carrier plate 20a or pulley 40a also rotates the other fitted component, i.e. the other carrier plate 20b or pulley 40b.
  • the separate pulleys 42 are rotatably mounted on the floor grinding machine such that they may rotate with the pulleys 40a, 40b and be able to keep the tension in the loop 41.
  • the motor 12 is arranged in the similar way as one of the pulleys 42, i.e. the motor replaces one of these pulleys 42, and fixedly mounted on the floor grinding machine by means of known technology, e.g. by any one of the above mentioned coupling devices.
  • the second belt transmission (not shown in this application) that drives each carrier plate 20a, 20b, as explained with reference to the machine disclosed in the patent publication WO 94/08752 , is eliminated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Plural Heterocyclic Compounds (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Soil Working Implements (AREA)

Claims (18)

  1. Outil (10) de traitement de planchers, comprenant au moins deux plaques de support montées de façon rotative (20a, 20b) qui sont entraînée pendant l'utilisation et disposées l'une à côte de l'autre, dans lequel chaque plaque de support (20a, 20b) est à son tour adaptée pour porter au moins un disque de traitement monté de façon rotative (30) qui est entraîné à tourner pendant le traitement,
    dans lequel les disques de traitement (30) sont agencés de telle sorte que leurs surfaces de traitement soient capables de se chevaucher lorsque les disques sont entraînés, et la rotation des deux plaques de support (20a, 20b) est synchronisée de façon opérationnelle au moyen d'une transmission (40) qui interconnecte les deux plaques de support, de telle sorte que les disques de traitement (30) qui se chevauchent puissent tourner sans se heurter lors du traitement du plancher,
    caractérisé en ce qu'un moteur respectif (11) est associé à chacune des plaques de support (20a, 20b).
  2. Outil selon la revendication 1, dans lequel chaque moteur (11) est agencé de manière à faire tourner au moins un disque de traitement (30) qui est associé à la même plaque de support (20a, 20b) que le moteur (11), et dans lequel une deuxième transmission à courroie est installée pour transférer la rotation du disque de traitement (30) afin d'entraîner la plaque de support (20a, 20b) à tourner.
  3. Outil (10) selon l'une quelconque des revendications précédentes, dans lequel la transmission (40) comprend des roues (40a, 40b), au moins une roue pour chaque plaque de support (20a, 20b), dans lequel chaque roue est couplée fixement à sa plaque de support associée et est interconnectée de façon rotative au moyen d'une boucle (41), ladite boucle étant capable de synchroniser la rotation des roues l'une par rapport à l'autre de telle sorte que la rotation des plaques de support et des disques de traitement (30) soit synchronisée.
  4. Outil (10) selon l'une quelconque des revendications précédentes, dans lequel la transmission (40) est un mécanisme d'entraînement par courroie.
  5. Outil (10) selon l'une quelconque des revendications 1 à 3, dans lequel la transmission (40) est un mécanisme d'entraînement par chaîne.
  6. Outil (10) selon l'une quelconque des revendications 1 à 3, dans lequel la transmission (40) est un train d'engrenages.
  7. Outil (10) selon l'une quelconque des revendications 1 à 4, dans lequel la transmission (40) est un mécanisme de transmission par courroie trapézoïdale.
  8. Outil (10) selon l'une quelconque des revendications 1 à 4, dans lequel la transmission (40) est un mécanisme de transmission par courroie synchrone.
  9. Outil (10) selon l'une quelconque des revendications précédentes, dans lequel la transmission (40) comprend au moins une roue de tension (42) pour tendre la transmission.
  10. Outil (10) selon la revendication 9, dans lequel la transmission (40) comprend deux roues de tension (42) pour tendre la transmission.
  11. Outil (10) selon l'une quelconque des revendications précédentes, dans lequel chaque plaque de support (20a, 20b) porte au moins deux disques de traitement montés de façon rotative (30) qui sont entraînés en rotation pendant le traitement.
  12. Outil (10) selon l'une quelconque des revendications précédentes, dans lequel chaque plaque de support (20a, 20b) porte trois disques de traitement montés de façon rotative (30) qui sont entraînés en rotation pendant le traitement.
  13. Outil (10) selon l'une quelconque des revendications précédentes, dans lequel chaque plaque de support (20a, 20b) porte quatre disques de traitement montés de façon rotative (30) qui sont entraînés en rotation pendant le traitement.
  14. Outil (10) selon l'une quelconque des revendications précédentes, dans lequel au moins trois plaques de support montées de façon rotative (20a, 20b) sont agencées sur celui-ci.
  15. Outil (10) selon l'une quelconque des revendications précédentes, dans lequel la transmission (40) qui interconnecte les deux plaques de support (20a, 20b) est entraînée directement par au moins une source d'énergie séparée (12).
  16. Outil (10) selon l'une quelconque des revendications précédentes, dans lequel la transmission (40) qui interconnecte les deux plaques de support (20a, 20b) est entraînée par les plaques de support.
  17. Outil (10) selon l'une quelconque des revendications précédentes, dans lequel la transmission (40) est une troisième transmission qui interconnecte les deux plaques de support (20a, 20b), ladite troisième transmission (40) est entraînée indirectement par un moteur (11) qui entraîne d'abord ledit au moins un disque de traitement (30) sur chaque plaque de support par l'intermédiaire d'une première transmission, dans lequel ledit au moins un disque de traitement entraîne à son tour sa plaque de support au moyen d'une deuxième transmission, de telle sorte que les plaques de support entraînent la troisième transmission.
  18. Machine de traitement de planchers, caractérisée en ce que la machine comprend au moins un outil (10) selon l'une quelconque des revendications 1 à 17.
EP07103958A 2007-03-12 2007-03-12 Machine de traitement des planchers Not-in-force EP1970160B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AT07103958T ATE458584T1 (de) 2007-03-12 2007-03-12 Bodenbearbeitungsgerät
EP07103958A EP1970160B1 (fr) 2007-03-12 2007-03-12 Machine de traitement des planchers
DE602007004942T DE602007004942D1 (de) 2007-03-12 2007-03-12 Bodenbearbeitungsgerät
PCT/SE2008/050251 WO2008111902A1 (fr) 2007-03-12 2008-03-06 Outil compact à poncer les dalles
AU2008225212A AU2008225212A1 (en) 2007-03-12 2008-03-06 Compact machining device for machining floors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07103958A EP1970160B1 (fr) 2007-03-12 2007-03-12 Machine de traitement des planchers

Publications (2)

Publication Number Publication Date
EP1970160A1 EP1970160A1 (fr) 2008-09-17
EP1970160B1 true EP1970160B1 (fr) 2010-02-24

Family

ID=38328495

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07103958A Not-in-force EP1970160B1 (fr) 2007-03-12 2007-03-12 Machine de traitement des planchers

Country Status (5)

Country Link
EP (1) EP1970160B1 (fr)
AT (1) ATE458584T1 (fr)
AU (1) AU2008225212A1 (fr)
DE (1) DE602007004942D1 (fr)
WO (1) WO2008111902A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2561959B1 (fr) * 2011-08-22 2013-10-09 Cha Enterprise Co., Ltd. mécanisme d'entraînement pour une ponceuse
US8870631B2 (en) 2011-08-23 2014-10-28 Cha Enterprise Co., Ltd. Drive assembly for a grinder
US8684796B2 (en) * 2011-10-04 2014-04-01 Krmc, Llc Floor grinding and polishing machine
US10406648B2 (en) * 2012-01-19 2019-09-10 Newgrind Inc. Apparatus for surface abrasion
SE537973C2 (sv) 2014-04-29 2015-12-29 Per-Erik Lilienberg Slip/fräsmaskin för planbearbetning av horisontella ytor
CN104668219B (zh) * 2014-12-30 2016-09-14 信宜市恒大机械科技有限公司 砖车清扫装置

Family Cites Families (11)

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Publication number Priority date Publication date Assignee Title
US1142570A (en) * 1912-06-18 1915-06-08 William La Hodny Polishing-machine.
US1761196A (en) * 1926-02-19 1930-06-03 Libbey Owens Glass Co Sheet-glass-surfacing apparatus
US2171060A (en) * 1939-02-18 1939-08-29 Spirt Giles De Floor surfacing machine
US2759305A (en) * 1954-06-11 1956-08-21 Cyclo Mfg Company Portable abrading and polishing machine
US3102372A (en) * 1962-09-10 1963-09-03 Terrazzo Machine And Supply Co Terrazzo grinding machine
US3452486A (en) * 1967-06-26 1969-07-01 Terrazzo Supply Corp Floor surfacing machine
GB8818478D0 (en) * 1988-08-03 1988-09-07 B A Power Tool Ltd Grinding machine
SE501448C2 (sv) * 1992-10-22 1995-02-20 Haakan Thysell Anordning vid en mobil slipmaskin för slipning av stengolv
NL1006141C1 (nl) * 1997-05-27 1998-12-01 Holland Ind Diamantwerken Bv Slijpmachine.
SE518356C2 (sv) * 2001-02-06 2002-10-01 Haakan Thysell Anordning vid mobil maskin för slipning av golvytor
DE202007010059U1 (de) * 2007-07-17 2007-10-18 Jacob Löwer Inh. von Schumann GmbH & Co. KG Durchlaufschleifmaschine zum Bearbeiten einer Werkstückoberfläche

Also Published As

Publication number Publication date
AU2008225212A1 (en) 2008-09-18
AU2008225212A2 (en) 2009-11-12
ATE458584T1 (de) 2010-03-15
DE602007004942D1 (de) 2010-04-08
EP1970160A1 (fr) 2008-09-17
WO2008111902A8 (fr) 2008-12-18
WO2008111902A1 (fr) 2008-09-18

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