EP2981721B1 - Pompe de dosage en matière plastique - Google Patents

Pompe de dosage en matière plastique Download PDF

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Publication number
EP2981721B1
EP2981721B1 EP14708057.6A EP14708057A EP2981721B1 EP 2981721 B1 EP2981721 B1 EP 2981721B1 EP 14708057 A EP14708057 A EP 14708057A EP 2981721 B1 EP2981721 B1 EP 2981721B1
Authority
EP
European Patent Office
Prior art keywords
rotor
rotor blade
pump housing
metering pump
pump
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
EP14708057.6A
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German (de)
English (en)
Other versions
EP2981721A1 (fr
Inventor
Dan Barron
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2981721A1 publication Critical patent/EP2981721A1/fr
Application granted granted Critical
Publication of EP2981721B1 publication Critical patent/EP2981721B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/126—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with radially from the rotor body extending elements, not necessarily co-operating with corresponding recesses in the other rotor, e.g. lobes, Roots type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B13/00—Pumps specially modified to deliver fixed or variable measured quantities
    • F04B13/02—Pumps specially modified to deliver fixed or variable measured quantities of two or more fluids at the same time
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
    • F04C11/005—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations of dissimilar working principle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0003—Sealing arrangements in rotary-piston machines or pumps
    • F04C15/0034—Sealing arrangements in rotary-piston machines or pumps for other than the working fluid, i.e. the sealing arrangements are not between working chambers of the machine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
    • F04C15/0061—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/06—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/082—Details specially related to intermeshing engagement type machines or pumps
    • F04C2/084—Toothed wheels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber

Definitions

  • the present invention relates to a metering pump made of plastic with two via gears coupled to each other, rotatably driven rotors, which are mounted in a pump housing which is provided with intake and outlet, each rotor having a rotor shaft whose rotor shaft ends in the walls of the pump housing ,
  • Metering pumps are known in all sizes and types. As metering pumps made of plastic in particular manually operated piston pumps are known, as they are known on soap dispensers for liquid soaps or as here of particular interest in the hospitality industry, where, for example, in fast food companies mustard, ketchup or creamer delivered with such hand-operated piston pumps metered. Despite these metering pumps, however, the quantity delivered varies relatively greatly, since in the case of the metering pumps, in particular those as described here, the stroke should actually be fully utilized with each actuation, but this is usually not the case. Instead, often one, two or three Kurzhube be carried out and varies accordingly, the amount very strong. As long as this amount is given as an addition to a hamburger, this plays only a minor role. However, where such metering pumps are also used to add a special amount of a liquid food to a recipe, the taste is varied by improper operation, which is not always appreciated by customers.
  • the plastic metering pump of interest here should be designed in particular for foods that are dispensed in so-called tubular bags or other soft packaging made of plastic films
  • Many liquid foods also contain larger amounts of solids.
  • Typical examples of such liquid foods are, for example, sauce tartare, mustard sauces with pickles, vanilla sauce with chocolate or almonds, etc.
  • sauce tartare a sauce tartare
  • mustard sauces with pickles a sauce with pickles
  • vanilla sauce with chocolate or almonds etc.
  • gear pumps as such, for example in the FR-2313971 is shown, this can hardly be realized.
  • For larger solid particles, such as almond pins they are ground by the rotors or block the rotors.
  • dosing pumps are suitable for such dosing pumps, in particular in which the rotors have two or more rolling elements.
  • Examples of such pumps are from the US 3054417 where a dosing pump for liquid media for admixing other liquids is shown, in which case each rotor has three vane arms and these vane arms roll against each other and so on transport the medium.
  • there is enough between the housing and the individual rotor blades Space to transport liquids with solid particles.
  • solid particles are less the larger solid particles a problem, but rather the smaller solid parts that stick to the mutually rolling rotor blades and are completely crushed during the rolling process, whereupon a coating can form, which reduces the flow rate and can even lead to blockages.
  • Another rotary piston pump is out of the EP-1 892 417 known. However, this is designed as an insert for an outer metallic housing, but is created for one-way use and has a plastic housing.
  • the gear transmission with which the correct relative position of the two rotors is ensured, is part of a arranged outside of the actual pump gear and not part of the intended for disposable parts.
  • the intermeshing rotors in operation have concave recesses, but they are not shaped in such a way that the rotary piston pump is particularly suitable for products with solids content.
  • the comparatively narrow radii of the concave recesses allow it to occur in these areas deposits that remain in the pump and possibly spoil quickly in the case of food by contact with the outside air.
  • optimization with regard to the achievement of minimal product residues means that the shape of the rotor blade shoes and the concave recesses is designed and matched to one another so that either no or only as few product residues as possible get caught in the concave molding areas or if the product remains stuck in the concave molding areas through the end edges the rotor wing shoes during operation as completely and continuously stripped again and transported on.
  • each rotor has for this purpose part-cylindrical rotor blade shoes and concave indentations whose respective curvatures or radii of curvature are in parts at least approximately equal.
  • the exact curves result from the counter-rotating rolling or combing movements of the two rotors.
  • Fig. 1 is symbolically a preferred application of the inventive metering pump, which is generally designated 1, shown on a tubular bag 2.
  • the metering pump 1 is held on the tubular bag 2 by means of a fastening sleeve 3 which is provided with a flange 4 on the tubular bag 2.
  • the connection of the flange 4 with the tubular bag 2 is preferably carried out by ultrasonic welding.
  • the metering pump itself is shown with a view of a fixed end wall 8 of the pump housing 5, in which case a rotor shaft end 15 with a Drive coupling part 16 provided by the aforementioned solid end wall 8 protrudes and one recognizes the drive coupling part 16.
  • the drive coupling part serves to be positively connected to a drive means, not shown here.
  • the metering pump 1 is shown with the attachment piece on its own.
  • opening means 17 which are formed here as perforating and incisors and in this position are still completely within the intake manifold 6 before the first use.
  • the aforementioned Opening means 17 an aseptically closed container, preferably a tubular bag made of plastic film, cut open.
  • the outlet port 7 is provided with a closure cap 18, which ensures that during transport and storage no foreign matter or foreign particles can get into the metering pump.
  • the pump housing 5 is shown open. While in the Fig. 1 As already mentioned, looking at the fixed end wall 8 of the pump housing 5, here the metering pump 1 is shown rotated by 180 ° and you look at that side of the metering pump 1 with a detachable end wall 9. This detachable end wall 9 is shown laterally offset or released.
  • the detachable end wall 9 can also be referred to as a pump housing cover.
  • the outwardly closed bearing bushes 19 are held stabilized with stiffening ribs 20 on the outside of the detachable end wall 9.
  • the metering pump 1 is shown in the side view, but in the same situation as in Fig. 2 However, with the omission of the detachable end wall 9 of the pump housing 5.
  • the two rotors mounted in the pump housing 5 rotors 10, which preferably integrally gears 11 are formed, which cause the two rotors, if one of the two rotors is driven, move in opposite directions.
  • the exact configuration of the two rotors 10 is based on the following Fig. 4 and 5 directed.
  • Fig. 4 and 5 directed.
  • every rotor is provided with a rotor shaft 12, wherein one looks here on the rotor shaft ends 15, and wherein on the rotor shafts 12 each have two diametrically opposed rotor blade walls 13 are formed.
  • a rotor blade shoe 14 is formed in each case.
  • Each rotor blade has a part-cylindrical shape, which is adapted to the cylindrical part of the pump housing 5 in the curvature. As here (but also from the Fig. 8 ) is visible, each rotor blade 14 is constantly either on the inside of the pump housing or strips with an end edge 22 of the rotor blade 14, a concave indentation 24 of the adjacent rotor.
  • concave recesses 24 on both sides between the Rotor shafts 12 and the rotor wing shoes 14 in the rotor blade walls and the rotor blade shoes 14 formed.
  • the shape of the rotor blade shoes and the indentations with respect to minimal product residues is optimized. Like from the Fig. 4 it can be seen that the curvature of the part-cylindrical rotor blade shoes 14 and the curvature of the concave recesses 24 are at least approximately equal. With this design optimization is to be achieved that in the region of the concave recesses 24 as possible no niches exist, in which material residues could remain undetectable.
  • both rotors 10 are designed absolutely identical, so that only one injection mold is needed for their production. This also has the advantage that with the same design of the two rotors also during assembly no source of error arises.
  • the metering pump according to the invention is preferably designed practically in such a way that the pump seals the connection between intake manifold 6 and outlet connector 7.
  • the pump or its rotors 10 and the pump housing 5 on sealing elements.
  • these sealing elements also purify and prevent deposits in the pump housing, which can lead to a reduction in quality and leaks and, in the worst case, blockages of the pump.
  • the rotor blade walls 13 have end faces 26.
  • the gears 11 are integrally connected to the end faces.
  • Leksabstreifrippen 28 are also mounted on the rotor shaft. These Leksabstreifrippen 28 extend parallel to the axis A of the rotor shaft 12. In principle, it suffices in each case to attach a Leksabstreifrippe 28 on each rotor shaft 12, but preferably two such Leksabstreifrippen are each mounted on the same side. These Lekssabstreifrippen 28 not only act sealing, but also clean the rotor blade 14 on the outside of 21 there may be formed deposits. These constructive features practically a self-cleaning and very low-residue metering pump is formed.
  • Fig. 5 shows for better understanding nor a rotor in a perspective view seen from the gear side. Clearly visible here are the integrally formed gear 11 and the drive coupling part 16.
  • the pump housing 5 is shown by itself.
  • the intake manifold 6 and the outlet 7 are only partially visible.
  • the pump housing cover, or the detachable end wall 9 of the pump housing 5 is removed.
  • Hierin are second bearing sleeves 29, 30 formed, wherein the second bearing sleeve 29 is designed to be closed, and the other second bearing sleeve 30 is open to the outside.
  • a circumferential sealing lip 31 is preferably formed with a lesser height.
  • the rotors 10 have on their rotor shafts 12 on both sides rotor shaft ends 15, which are designed as a bearing pin 35.
  • the bearing pin 35 on the side of the pump housing cover 9 have a smaller diameter, while the bearing pin 35 on the other gear side have a much larger diameter. Since, however, as already mentioned, preferably the two rotors are of identical design, both rotors also have the above-mentioned drive coupling part 16 at that rotor shaft end with the larger diameter, which already has reference to FIG Fig. 1 and 5 has been described. While in the Fig.
  • bearings are molded in the detachable end wall. However, these are referred to here as closed bearing bushes 19. Since these bushings 19 are closed, no additional sealing means are required here.
  • the diameter of these closed bearing bushes 19 is substantially smaller than the diameter of the two bearing sleeves 29 and 30. In these closed bearing bushes 19 engage the rotor shaft ends 15, which are designed as a bearing pin 30, as shown most clearly in the Fig. 4 is apparent.
  • the Fig. 8 shows for further illustration, finally, the Kämm the two rotors 10 in two different angular positions.
  • Analogous to the Figures 2-4 the two rotors on the left side of the picture are in a correct first relative position as shown in the installation. Since the two rotors 10 rotate in opposite directions, their position is shown after a rotation by an angle ⁇ on the right side again in a correct second relative position. It can clearly be seen that the end edges 22 of the rotor blade shoes 14 meshing with the concave recesses 24 of the adjacent rotor.
  • the size of the solid particles plays virtually no role, they must of course be in size so that it is less than the distance between the two rotor shafts. But whether the solid particles are coarse-grained or fine-grained and thus more or less prone to deposits does not matter.
  • the solid parts are not ground, and on the other hand, their deposits on the pump housing and on the rotor wing shoes or on the rotor shafts are continuously removed by the means described above. This ensures that the metering pump, which serves as a disposable metering pump, always works reliably for the required service life.
  • the food which is delivered in the fully closed aseptic tubular bag can be offered without or at least substantially less preservative.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Claims (8)

  1. Pompe de dosage jetable (1) en matière plastique pour des produits contenant des proportions de matières solides, comprenant deux rotors (10) entraînés en sens inverse, accouplés l'un à l'autre par le biais de roues dentées (11), qui sont supportés dans un carter de pompe (5) qui est pourvu de tubulures d'aspiration (6) et de tubulures de sortie (7), chaque rotor (10) présentant un arbre de rotor (12) dont les extrémités d'arbre de rotor (15) sont supportées dans les parois (8, 4) du carter de pompe (5), et chaque rotor (10) présentant deux parois de pales de rotor (13) disposées diamétralement sur l'arbre de rotor (12), au niveau des extrémités périphériques desquelles est façonné un sabot de pale de rotor partiellement cylindrique respectif (14), les sabots de pales de rotor (14) s'appliquant de manière glissante et hermétique contre les régions de paroi interne cylindriques du carter de pompe (5) et les parois de pales de rotor (13) présentant en outre entre les arbres de rotor (12) et les sabots de pales de rotor (14) des formations concaves des deux côtés (24) dans lesquelles peut s'engrener une arête d'extrémité (22) d'un sabot de pale de rotor du rotor adjacent, caractérisée en ce que la forme des sabots de pales de rotor et des formations est optimisée en vue d'obtenir le moins possible de résidus de produits par le fait que les arêtes d'extrémité (22) des sabots de pales de rotor (14) s'engrènent par contact avec les formations concaves (24) du rotor adjacent et en ce qu'au moins une nervure de raclage longitudinale (28) orientée radialement vers l'extérieur et s'étendant parallèlement à l'axe d'arbre de rotor (A) est disposée en outre au niveau de chaque arbre de rotor (12).
  2. Pompe de dosage selon la revendication 1, caractérisée en ce que la courbure des sabots de pales de rotor partiellement cylindriques (14) et la courbure des formations concaves (24) sont au moins approximativement identiques.
  3. Pompe de dosage (1) selon la revendication 1 ou 2, caractérisée en ce qu'une roue dentée (11) est façonnée d'une seule pièce sur chaque arbre de rotor (12).
  4. Pompe de dosage (1) selon l'une quelconque des revendications 1 à 3, caractérisée en ce que le carter de pompe (5) présente une paroi frontale (8) connectée fixement au carter de pompe (5) et une paroi frontale (9) pouvant être détachée de celui-ci, au moins une extrémité d'arbre de rotor (15) présentant une partie d'accouplement d'entraînement (16) traversant le carter de pompe (5), laquelle traverse la paroi frontale connectée fixement au carter de pompe (5).
  5. Pompe de dosage (1) selon la revendication 4, caractérisée en ce que les deux rotors (10) sont identiques et présentent tous deux ainsi une partie d'accouplement d'entraînement (16), l'une des parties d'accouplement d'entraînement (16) étant supportée dans une deuxième douille-palier ouverte (30) et l'autre étant supportée dans une douille-palier (29) fermée vers l'extérieur.
  6. Pompe de dosage (1) selon la revendication 5, caractérisée en ce qu'au moins une lèvre d'étanchéité périphérique (31) est façonnée d'une seule pièce dans la deuxième douille-palier ouverte (30).
  7. Pompe de dosage (1) selon la revendication 3; caractérisée en ce qu'au moins une lèvre d'étanchéité (27) pour l'application hermétique contre la paroi frontale détachable (9) du carter de pompe (5) est prévue au niveau des parois de pales de rotor (13) sur leurs côtés frontaux (26) éloignés des roues dentées (11).
  8. Pompe de dosage (1) selon la revendication 1, caractérisée en ce qu'entre les deux parois de pales de rotor s'étendant diamétralement (13), des deux côtés de l'arbre de rotor (12), sont disposées deux nervures de raclage longitudinales parallèles (28).
EP14708057.6A 2013-04-03 2014-03-06 Pompe de dosage en matière plastique Active EP2981721B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013205843.8A DE102013205843B4 (de) 2013-04-03 2013-04-03 Dosierpumpe aus Kunststoff
PCT/EP2014/054352 WO2014161700A1 (fr) 2013-04-03 2014-03-06 Pompe de dosage en matière plastique

Publications (2)

Publication Number Publication Date
EP2981721A1 EP2981721A1 (fr) 2016-02-10
EP2981721B1 true EP2981721B1 (fr) 2017-01-11

Family

ID=50231184

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14708057.6A Active EP2981721B1 (fr) 2013-04-03 2014-03-06 Pompe de dosage en matière plastique

Country Status (4)

Country Link
US (1) US9732750B2 (fr)
EP (1) EP2981721B1 (fr)
DE (1) DE102013205843B4 (fr)
WO (1) WO2014161700A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2956851A1 (es) * 2022-05-24 2023-12-29 Alarcon Antonio Canizares Bomba de impulsion de masa viscosa con elementos solidos en suspension

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3054417A (en) 1956-05-07 1962-09-18 Corvisier Louis Rene Apparatus for mixing liquids in a constant proportion
FR1326006A (fr) * 1962-06-01 1963-05-03 Pompe pour produits pulvérulents ou granuleux ou pâteux
DE2526215A1 (de) 1975-06-12 1976-12-30 Elastogran Gmbh Misch- und dosiervorrichtung fuer mehrkomponentenkunststoffe, insbesondere polyurethan
US5558116A (en) 1994-03-07 1996-09-24 Createchnic Ag Metering cap
DE102005042040B3 (de) 2005-09-02 2007-05-16 Fresenius Medical Care De Gmbh Zahnradpumpe
GB2440944B (en) 2006-08-11 2011-10-12 Itt Mfg Enterprises Inc Rotary lobe pump

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
WO2014161700A1 (fr) 2014-10-09
DE102013205843A1 (de) 2014-10-09
US20160053757A1 (en) 2016-02-25
EP2981721A1 (fr) 2016-02-10
US9732750B2 (en) 2017-08-15
DE102013205843B4 (de) 2024-02-15

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