EP3021730B1 - Dispositif combiné de lavage et de rinçage et lave-vaisselle pourvu de celui-ci - Google Patents

Dispositif combiné de lavage et de rinçage et lave-vaisselle pourvu de celui-ci Download PDF

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Publication number
EP3021730B1
EP3021730B1 EP14747776.4A EP14747776A EP3021730B1 EP 3021730 B1 EP3021730 B1 EP 3021730B1 EP 14747776 A EP14747776 A EP 14747776A EP 3021730 B1 EP3021730 B1 EP 3021730B1
Authority
EP
European Patent Office
Prior art keywords
nozzles
arm
hub
half shell
sleeve
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
EP14747776.4A
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German (de)
English (en)
Other versions
EP3021730A1 (fr
Inventor
Luca Montagnana
Norberto CEVOLONI
Riccardo ORLANDI
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.)
Premark FEG LLC
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Premark FEG LLC
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Filing date
Publication date
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Publication of EP3021730A1 publication Critical patent/EP3021730A1/fr
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Publication of EP3021730B1 publication Critical patent/EP3021730B1/fr
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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/14—Washing or rinsing machines for crockery or tableware with stationary crockery baskets and spraying devices within the cleaning chamber
    • A47L15/18—Washing or rinsing machines for crockery or tableware with stationary crockery baskets and spraying devices within the cleaning chamber with movably-mounted spraying devices
    • A47L15/22—Rotary spraying devices
    • A47L15/23—Rotary spraying devices moved by means of the sprays
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
    • A47L15/4219—Water recirculation
    • A47L15/4221—Arrangements for redirection of washing water, e.g. water diverters to selectively supply the spray arms

Definitions

  • the present invention relates to a low-cost, small-sized combined washing and rinsing device.
  • the invention further relates to a dishwashing machine including such a device.
  • Dishwashing machines in particular those for professional use (in communities, hotels, restaurants etc.), are usually provided with a washing tank provided with a pair of coaxial rotating arms, a first one for dispensing the washing liquid (water and detergent) and the second for dispensing the rinsing liquid (water).
  • a washing tank provided with a pair of coaxial rotating arms, a first one for dispensing the washing liquid (water and detergent) and the second for dispensing the rinsing liquid (water).
  • FIG. 1 is a washing tank of a dishwashing machine 1b (illustrated only in part for the sake of simplicity); the washing tank 1 is provided with filters 2, a washing arm 3 and a rinsing arm 4, mounted coaxial and overlapping each other over two coaxial dispensing pipes 5,6, which lead into the chamber 1.
  • a combined washing and rinsing device is thus supplied, as defined in claim 1.
  • the combined washing and rinsing device comprises: a single arm, delimited on the outside by a first face equipped with a plurality of first, washing nozzles and with a plurality of second, rinsing nozzles, which are arranged aligned with each other, the first nozzles to form at least a first row in a longitudinal direction of extension of the arm and the second nozzles to form at least a second row in said longitudinal direction; a hub carried by a second face of the arm opposite to the first, and arranged substantially on the center-line of the arm, which rotates, in use, on the hub, about a symmetry axis of the hub; and a double hydraulic delivery circuit defined by the arm for separately supplying the first and the second nozzles.
  • the arm is defined by an internally hollow body formed by a first and by a second half shell coupled to overlap each other at the part of the respective concavities thereof, the first half shell delimiting the first face on the part opposite to the concavity thereof, and the second half shell delimiting the second face, on the part opposite to the concavity thereof; while the double hydraulic delivery circuit is obtained inside the second half shell by means of a longitudinal rib which overhangs inside the concavity of the second half shell and which couples in a fluid sealing manner with the first half shell to form, inside the arm, a first and a second chamber, which are separate from each other, into which the first and the second nozzles lead, respectively.
  • the two half shells are fixed to each other in a fluid sealing manner.
  • the half shells are obtained by molding of a synthetic plastic material and fixed to each other by vibration welding.
  • the nozzles are arranged preferably inclined with respect to a plane perpendicular to the symmetry axis of the hub and to the rotation axis of the single arm.
  • the invention finally relates to a dishwashing machine provided with the aforesaid combined washing and rinsing device.
  • reference number 10 indicates as a whole a combined washing and rinsing device for a dishwashing machine, such as the known professional dishwashing machine 1b in figure 1 ; in particular, the device 10 can be mounted in use on the dispensing pipes 5,6, as explained below, to replace the two arms 3 and 4.
  • the device 10 comprises a single arm 11, shown in exploded configuration in figure 2 , delimited on the outside by a first face 12 provided with a plurality (a first group) of first washing nozzles 13 and a plurality (a second group) of rinsing nozzles 14; a hub 15 carried by a second face 16 of the arm 11 opposite to first face 12, and arranged substantially on the center-line of the arm 11; and a double hydraulic circuit 17 ( figure 2 ) for dispensing operative fluids of the dishwasher 1b, defined by the arm 11 and by the hub 15, and adapted to separately supply the group of nozzles 13 and the group of nozzles 14, respectively.
  • the arm 11 rotates in use on the hub 15, about a symmetry axis A of the hub, as described more in detail below.
  • the nozzles 13 and 14 of each group are generally arranged aligned with one another.
  • the first nozzles 13 are aligned to form, in a longitudinal direction of extension of the arm 11 ( figure 3 ), at least a first row F1 of nozzles 13, while the second nozzles 14 are aligned to form in the same longitudinal direction D at least a second row F2 of nozzles 14.
  • the arm 11 is defined by a flat, internally hollow "biscuit-shaped" body, formed by a first half shell 18 and by a second half shell 19 coupled to each other to overlap at the side of their respective concavities 20 and 21, respectively.
  • the first half shell 18 delimits the first face 12 on the part opposite to its concavity 20 and the second half shell 19 delimits the second face 16 on the part opposite to concavity 21.
  • the double hydraulic circuit 17 is obtained within the second half shell 19 by means of a longitudinal rib 22 which overhangs inside the concavity 21 of the half shell 19 and which couples in a fluid sealing manner with the half shell 18 to form inside the arm 11 a first chamber 23 and a second chamber 24, reciprocally separate, to which the first nozzles 13 (in chamber 23) and the second nozzles 14 (in chamber 24) are lead.
  • the half shells 18,19 are fixed integrally to each other in a fluid sealing manner.
  • the half shells 18 and 19 are obtained by molding of synthetic plastic material, are mechanically coupled by means of teeth 25 and are reciprocally welded in a fluid sealing manner along respective edges 26 and 27 delimiting the concavity 20 and 21 for the entire extension thereof and along the entire rib 22, which is coupled to a ridge 28 inside the half shell 18, which longitudinally extends for the entire length of the half shell 18.
  • the integral, fluid sealing union per welding is obtained in any appropriate known manner adapted for synthetic plastic material, e.g. by ultrasound welding or preferably by vibration welding.
  • the hub 15 is obtained solely and integrally in one piece with the second half shell 19 and is formed ( figure 7 ) by a first sleeve 29 and by a second sleeve 30 arranged coaxial with respect to axis A and having a different axial extension with respect to each other on the side of second face 16.
  • the sleeve 29 is arranged radially outside and has, on the side of the face 16, an axial extension, which is greater than that, on the same part, of the sleeve 30, which is arranged instead radially on the inside, partially within the sleeve 29.
  • the two coaxial sleeves 29 and 30 are shaped (by appropriately selecting their diameters, axial lengths and reciprocal positions) so as to be adapted in use to couple in idle, substantially fluid sealed manner with the traditional dispensing pipes 5 and 6 of a known dishwashing machine 1b, like the one in figure 1 , so that the single arm 11 may be easily mounted in use, in rotating manner, on the pipes 5 and 6, instead of the two traditional arms 3 and 4.
  • the entire hub 15, i.e. both its sleeves 29 and 30, are obtained entirely integral in one piece with the half shell 19 allows to ensure the dimensional constancy and accuracy necessary to allow, in use, the later coupling with the two pipes 5 and 6, and to avoid the formation of undercuts, so that the half shell 19 may be molded in one step, without using molds with moveable parts, which considerably reduces the cost.
  • the sleeve 29 is not only arranged radially outside the sleeve 30, but it also integrally supports the sleeve 30 by means of one pair of diametrically opposite spokes 31 ( figures 4 and 7 ), which delimit between the sleeves 29 and 30 and through the second half shell 19, in an empty radial space delimited between the sleeves 29 and 30, a pair of circumferentially extending axial through access apertures 32 to chamber 23.
  • the arm 11 has, in the longitudinal direction D, a central section or part 33 provided with the hub 15 and, in a plan view, namely on a plane perpendicular to the symmetry axis A of the hub 15, is S-shaped (in a plan view from the bottom, i.e. on the side of face 16), in other words is shaped as an upside down S (in a plan view from the top, i.e. on the side of face 12).
  • the arm 11 has, again in the longitudinal direction D, a first section or peripheral part 34 and a second section or peripheral part 35 opposite to section 34, which sections 34 and 35 radially overhangingly protrude from the central section 33 in eccentric and diametrically opposite positions with respect to the symmetry axis of the hub 15.
  • the two peripheral sections 34 and 35 are provided with nozzles 13 and 14, while the central section 33 is nozzle-free and operates as supporting part to allow, as explained below, the hydraulic connection between the chambers 23,24 and the hub 15.
  • the chamber 23, despite extending for the entire length of the arm 11 in direction D and through the hub 15, is divided by the hub 15 and the rib 22 into two sections 23b and 23c ( figure 2 ), opposite to each other and radially staggered but communicating, the chamber section 23b extending along the first section 34 of the arm 11 and the chamber section 23c extending along the second peripheral section 35 of the arm 11, respectively; the two chamber sections 23b and 23c are accessible through the hub 15, in particular through the respective axial through apertures 32 delimited between the sleeves 29 and 30, and in the case in point through the second half shell 19 at respective curvilinear stretches 36 of the central section 33.
  • the chamber 24 is a rectilinear chamber which extends through the hub 15, in particular, as explained below, through the sleeve 30, for the entire length of the arm 11 and along the two peripheral sections 34 and 35, parallel to and by the side of the sections 23b and 23c of the chamber 23.
  • the nozzles 14 are aligned along a same row F2 which extends on both the peripheral sections 34 and 35, while the nozzles 13 are aligned along the row F1, which extends only along the first section 34 and along a third row F3 which extends only along the second peripheral section 35 and which is parallel but unaligned with respect to row F1.
  • the spokes 31 are internally hollow and hydraulically connect, from opposite sides, the chamber 24 to the inside of the sleeve 30, through respective radial through apertures 37 obtained through the sleeve 30 at the spokes 31.
  • the chamber 24 is consequently delimited between the sleeve 29, the longitudinal rib 22 and at least one side wall of the half shell 19, in the case in point between a portion of a side wall 38 of the half shell 19, alongside section 34 and a portion of a side wall 39 of the half shell 19, opposite to wall 38, alongside section 35.
  • the chamber 23 is instead delimited between the sleeve 29, the rib 22, the curvilinear stretches 36 of the central section 33 and respective portions of the side walls 38 and 39, section 35 alongside wall 38 and section 34 alongside wall 39, respectively.
  • the nozzles 13 and 14 are obtained integral in one piece with the first half shell 18, which is formed by molding, so as not to define any undercuts in axial direction i.e. a direction parallel to axis A. Furthermore, the nozzles 13 and 14 are arranged oblique with respect to a plane perpendicular to the symmetry axis A of the hub 15 and rotation axis in use of the single arm 11, so as to determine, in use, a propulsive impulse which determines the rotation of the single arm on the hub by virtue of the dispensing of a service washing fluid from the nozzles 13 and of the dispensing of a service rinsing fluid from the nozzles 14.
  • the nozzles 13 are inclined with respect to the perpendicular P to the plane perpendicular to the axis A by an angle ⁇ 1
  • the nozzles 14 are inclined with respect to the perpendicular P to the plane perpendicular to the axis A by an angle ⁇ 2 which is different from the previous angle, so as to compensate for the different flow rates which may be emitted by the nozzles 14 with respect to the nozzles 13 and vice versa.
  • the invention also relates to a professional dishwashing machine, like the dishwashing machine 1b in figure 1 but comprising a combined washing and rinsing device 10 as described above, in particular formed by a single "mixed" arm 11 which replaces and substitutes the traditional separate arms 3 and 4, in which the hub 15 is formed by the sleeves 29 and 30 arranged coaxial and having a mutually different extension, the sleeve 29 being coupled in a fluid sealing manner to the pipe 5 and the sleeve 30 being coupled in a fluid sealing manner to the washing and rinsing operative fluid feeding pipe 6, respectively, also arranged coaxial to each other, so as to support the single arm 11 in idle manner on at least of one (or both) of the pipes 5 and 6.
  • the single arm 11 may also be adapted to existing dishwashing machines and, in all cases, an extremely compact combined washing and rinsing system is obtained, which is easy and cost-effective to make and mount, is completely reliable and which does not even need the propulsive nozzles usually present on the traditional arms.

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  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Washing And Drying Of Tableware (AREA)
  • Detergent Compositions (AREA)

Claims (8)

  1. Dispositif combiné de lavage et de rinçage (10) pour un lave-vaisselle (1b), en particulier pour un lave-vaisselle professionnel, comprenant un seul bras (11) délimité sur le côté extérieur par une première face (12) équipée d'une pluralité de premières buses de lavage (13), et d'une pluralité de secondes buses de rinçage (14), qui sont agencées au moins partiellement alignées les unes avec les autres, les premières buses (13) formant au moins une première rangée (F1) dans une direction longitudinale (D) d'extension du bras (11) et les secondes buses (14) formant au moins une deuxième rangée (F2) dans ladite direction longitudinale (D); un moyeu (15) porté par une seconde face (16) du bras opposée à la première, et agencée sensiblement sur l'axe médian du bras (11), c'est-à-dire, lors de l'utilisation, qui tourne sur le moyeu (15), autour d'un axe de symétrie (A) du moyeu; et un double circuit de distribution hydraulique (17) défini par le bras (11) pour alimenter séparément les premières et secondes buses;
    dans lequel:
    i) le bras (11) est constitué d'un corps intérieurement creux formé par une première (18) et une seconde (19) demi-coquilles couplées de manière à se chevaucher mutuellement au niveau de la partie des concavités respectives (20, 21) de celles-ci, la première demi-coquille (18) délimitant, sur la partie opposée à la concavité (20) de celle-ci, la première face (12), et la seconde demi-coquille (19) délimitant, sur la partie opposée à la concavité (21) de celle-ci, la seconde face (16);
    ii) le double circuit de distribution hydraulique (17) est obtenu à l'intérieur de la seconde demi-coquille (19) au moyen d'une nervure longitudinale (22) qui est en surplomb à l'intérieur de la concavité (21) de la seconde demi-coquille (19) et qui se couple d'une manière étanche au fluide avec la première demi-coquille (18) de manière à former, à l'intérieur du bras (11), une première (23) et une seconde (24) chambres, qui sont séparées l'une de l'autre, dans lesquelles les première (13) et seconde (14) buses, respectivement, sont introduites; et
    iii) les première et seconde demi-coquilles (18, 19) sont intégralement attachées l'une à l'autre d'une manière étanche au fluide; et dans lequel le moyeu (15) est réalisé uniquement et complètement intégralement d'une seule pièce avec la seconde demi-coquille (19) et est formé par un premier (29) et un second (30) manchons, qui sont agencés de façon coaxiale et qui présentent, à la partie de la seconde face (16), une extension axiale qui est différente d'un manchon à l'autre,
    caractérisé en ce que:
    le premier manchon (29) est agencé radialement à l'extérieur du second manchon (30) et supporte intégralement le second manchon (30) au moyen d'au moins une paire de rayons diamétralement opposés (31), qui délimitent, entre le premier et le second manchons (29, 30), dans la seconde demi-coquille (19), une paire d'ouvertures traversantes axiales s'étendant de façon circonférentielle (32), pour accéder à la première chambre (23).
  2. Dispositif selon la revendication 1, caractérisé en ce que lesdits rayons (31) sont intérieurement creux et connectent de façon hydraulique, sur des côtés opposés, la seconde chambre (24) avec l'intérieur du second manchon (30), au moyen d'ouvertures radiales traversantes respectives (37) formées à travers le second manchon (30), aux rayons (31); la seconde chambre (24) étant délimitée entre le premier manchon (29), ladite nervure longitudinale (22) et au moins une paroi latérale extérieure (38; 39) de la seconde demi-coquille (19).
  3. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le corps creux qui définit le bras (11) présente une section centrale en forme de S (33) en plan, c'est-à-dire dans un plan perpendiculaire à l'axe de symétrie (A) du moyeu, et pourvue dudit moyeu (15); et une première (34) et une seconde (35) sections périphériques, qui font saillie radialement en surplomb à partir de la section centrale (33) dans des positions excentriques et diamétralement opposées par rapport à l'axe de symétrie (A) du moyeu, les sections périphériques (34, 35) étant équipées desdites premières et secondes buses (13, 14).
  4. Dispositif selon la revendication 3, caractérisé en ce que les secondes buses (14) sont toutes alignées le long d'une même deuxième rangée (F2) qui s'étend sur les deux sections périphériques (34, 35), alors que les premières buses (13) sont alignées le long d'une première rangée (F1) qui s'étend sur la première (34) des sections périphériques et le long d'une troisième rangée (F3) qui s'étend sur la seconde (35) des sections périphériques et qui n'est pas alignée par rapport à la première rangée (F1).
  5. Dispositif selon la revendication 3 ou 4, caractérisé en ce que le première chambre (23) est divisée, par le moyeu (15), en deux sections (23b, 23c) qui sont opposées l'une à l'autre et échelonnées radialement et qui s'étendent le long des première (34) et seconde (35) sections périphériques, respectivement, et qui sont accessibles à travers des ouvertures traversantes axiales respectives (32) ménagées à travers la seconde demi-coquille (19) à des étirements curvilignes respectifs (36) de la section centrale (33).
  6. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que les premières et secondes buses (13, 14) sont formées intégralement d'une seule pièce avec la première demi-coquille (18), qui a été formée par moulage, de manière à ne définir aucune découpe dans la direction axiale.
  7. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que lesdites premières et secondes buses (13, 14) sont agencées en oblique par rapport à un plan perpendiculaire à l'axe de symétrie (A) du moyeu et à l'axe de rotation de l'unique bras (11), de manière à déterminer, lors de l'utilisation, une impulsion de propulsion qui détermine la rotation de l'unique bras (11) sur le moyeu (15).
  8. Lave-vaisselle professionnel (1b), caractérisé en ce qu'il comprend un dispositif combiné de lavage et de rinçage (10) selon l'une quelconque des revendications précédentes, dans lequel le moyeu (15) est formé par un premier et un second manchons (29, 30) agencés de façon coaxiale et présentant une extension axiale différente d'un manchon à l'autre, qui sont couplés d'une manière étanche au fluide à un premier (5) et un second (6) tuyaux pour amener un fluide actif de lavage et de rinçage, respectivement, également agencés de façon coaxiale l'un par rapport à l'autre, de manière à supporter librement l'unique bras (11) sur au moins un desdits tuyaux (5, 6).
EP14747776.4A 2013-07-19 2014-07-17 Dispositif combiné de lavage et de rinçage et lave-vaisselle pourvu de celui-ci Active EP3021730B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000614A ITTO20130614A1 (it) 2013-07-19 2013-07-19 Dispositivo di lavaggio e risciacquo combinato e macchina lavastoviglie includente tale dispositivo
PCT/US2014/047003 WO2015009916A1 (fr) 2013-07-19 2014-07-17 Dispositif combiné de lavage et de rinçage et lave-vaisselle pourvu de celui-ci

Publications (2)

Publication Number Publication Date
EP3021730A1 EP3021730A1 (fr) 2016-05-25
EP3021730B1 true EP3021730B1 (fr) 2017-09-06

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EP14747776.4A Active EP3021730B1 (fr) 2013-07-19 2014-07-17 Dispositif combiné de lavage et de rinçage et lave-vaisselle pourvu de celui-ci

Country Status (4)

Country Link
EP (1) EP3021730B1 (fr)
ES (1) ES2647453T3 (fr)
IT (1) ITTO20130614A1 (fr)
WO (1) WO2015009916A1 (fr)

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Publication number Priority date Publication date Assignee Title
SE540512C2 (en) * 2016-03-30 2018-09-25 Granuldisk Ab Spray arm for a dishwashing apparatus
TR201615841A2 (tr) 2016-11-07 2018-05-21 Arcelik As Su tüketi̇mi̇ azaltilan bi̇r bulaşik maki̇nasi
CN107348922B (zh) * 2017-07-14 2021-08-20 佛山市顺德区美的洗涤电器制造有限公司 洗碗机的喷臂水管组件和洗碗机
TR201716895A2 (tr) * 2017-10-31 2019-05-21 Arcelik As Bi̇r yikama pervanesi̇
TR201717501A2 (tr) * 2017-11-08 2019-05-21 Arcelik As Bi̇r bulaşik maki̇nasi
TR201902651A2 (tr) * 2019-02-21 2020-09-21 Serdar Plastik Sanayi Ve Ticaret Anonim Sirketi 2K Sızdırmaz Püskürtmeli Döner Pervane

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DE7024995U (de) * 1970-07-03 1971-03-11 Robert Bosch Gmbh Geschirrspülmaschine
US4387496A (en) * 1980-12-08 1983-06-14 Whirlpool Corporation Method of forming a spray arm
DE19832982C2 (de) * 1998-07-22 2000-08-03 Premark Feg Llc Spülvorrichtung für eine Geschirrspülmaschine
JP2000157478A (ja) * 1998-11-30 2000-06-13 Hoshizaki Electric Co Ltd 食器洗浄機のノズル構造
JP4717866B2 (ja) * 2007-10-10 2011-07-06 パナソニック株式会社 食器洗い機
JP2011224232A (ja) * 2010-04-22 2011-11-10 Panasonic Corp 食器洗い機
ES2470972T3 (es) * 2011-05-12 2014-06-24 Lg Electronics Inc. Lavavajillas

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Also Published As

Publication number Publication date
ITTO20130614A1 (it) 2015-01-20
EP3021730A1 (fr) 2016-05-25
WO2015009916A1 (fr) 2015-01-22
ES2647453T3 (es) 2017-12-21

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