Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
  • F24S25/00—Arrangement of stationary mountings or supports for solar heat collector modules
  • F24S25/70—Arrangement of stationary mountings or supports for solar heat collector modules with means for adjusting the final position or orientation of supporting elements in relation to each other or to a mounting surface; with means for compensating mounting tolerances
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
  • F24S25/00—Arrangement of stationary mountings or supports for solar heat collector modules
  • F24S25/60—Fixation means, e.g. fasteners, specially adapted for supporting solar heat collector modules
  • F24S25/61—Fixation means, e.g. fasteners, specially adapted for supporting solar heat collector modules for fixing to the ground or to building structures
  • F24S25/617—Elements driven into the ground, e.g. anchor-piles; Foundations for supporting elements; Connectors for connecting supporting structures to the ground or to flat horizontal surfaces
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
  • F24S30/00—Arrangements for moving or orienting solar heat collector modules
  • F24S30/40—Arrangements for moving or orienting solar heat collector modules for rotary movement
  • F24S30/45—Arrangements for moving or orienting solar heat collector modules for rotary movement with two rotation axes
  • F24S30/452—Vertical primary axis
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
  • F24S30/00—Arrangements for moving or orienting solar heat collector modules
  • F24S2030/10—Special components
  • F24S2030/13—Transmissions
  • F24S2030/133—Transmissions in the form of flexible elements, e.g. belts, chains, ropes
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
  • F24S30/00—Arrangements for moving or orienting solar heat collector modules
  • F24S2030/10—Special components
  • F24S2030/13—Transmissions
  • F24S2030/137—Transmissions for deriving one movement from another one, e.g. for deriving elevation movement from azimuth movement
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
  • F24S30/00—Arrangements for moving or orienting solar heat collector modules
  • F24S2030/10—Special components
  • F24S2030/14—Movement guiding means
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
  • F24S30/00—Arrangements for moving or orienting solar heat collector modules
  • F24S2030/10—Special components
  • F24S2030/18—Load balancing means, e.g. use of counter-weights
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
  • Y02E10/00—Energy generation through renewable energy sources
  • Y02E10/40—Solar thermal energy, e.g. solar towers
  • Y02E10/47—Mountings or tracking
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T29/00—Metal working
  • Y10T29/49—Method of mechanical manufacture
  • Y10T29/4935—Heat exchanger or boiler making
  • Y10T29/49355—Solar energy device making

Definitions

• Tracking device for a photovoltaic system and method for establishing such a tracking device
• the invention relates to a tracking device for a photovoltaic system with the features of the preamble of patent claim 1 and a method for establishing such a tracking device.
• Such a tracking device can be taken from EP 1 710 651 B1.
• the achievable energy output depends on the angle of incidence of the sun relative to the photovoltaic module, so that it is expedient to increase the energy yield to use facilities that track the photovoltaic modules of the system after the year or daytime changing sun position.
• the vertical tracking should be mentioned, in which the photovoltaic module is tracked by a rotation of the module supporting support structure about an axis which is substantially vertical to the earth's surface, the sun's run.
• a horizontal tracking is possible in such a way that the photovoltaic module is pivoted or inclined in a horizontal axis, so that ideally a right angle to the sun is guaranteed.
• an elevation element called a cam ring or cam disk
• a cam track with different height levels.
• the different height levels are transmitted to the photovoltaic module via a coupling device embodied as articulated arm linkage in such a way that pivoting takes place about the horizontal axis.
• the coupling device in this case comprises a coupling element which moves in operation along the curved or guideway of the elevation element.
• the object of the invention is to further improve such a tracking device to be taken from EP 1 710 651 B1.
• the object is achieved according to the invention by a tracking device with the features of claim 1 and by a method for establishing such a tracking device with the features of claim 15.
• the tracking device is generally designed as a biaxial tracking device for both vertical and horizontal tracking.
• the horizontal tracking takes place here via a mechanical positive coupling with the vertical tracking, without an additional drive or an additional control for horizontal tracking required and in particular also provided.
• the tracking device comprises for each photovoltaic module a support frame which has a vertical tracking device and a mechanically positively coupled with this horizontal tracking device.
• the vertical tracking device in this case comprises a preferably designed as a support mast support structure which is rotatably mounted about a substantially vertical axis. In operation, the vertical tracking is carried out with the aid of a particular electric motor drive whose adjusting movement is transmitted to the supporting structure.
• the horizontal tracking device comprises in particular a Elevation element that defines a mechanical guideway with different height levels. In operation, the height levels defined by the guideway are transmitted to the photovoltaic module by means of a mechanical coupling device upon rotational movement of the support structure about the vertical axis to produce a pivotal movement about the horizontal axis.
• the coupling device in this case comprises a preferably designed as a fork element coupling element which moves in operation along the mechanical guideway.
• the mechanical coupling device is preferably non-rotatably connected to the supporting structure so that the mechanical coupling device moves along the guideway during a rotational movement about the vertical axis.
• the elevation element is preferably non-rotatably connected to an anchoring element, via which the support frame is fastened on the bottom side to the intended mounting surface for the photovoltaic system.
• the anchoring element is for example a ground anchor, wherein each support frame is assigned a separate ground anchor.
• the anchoring element may also be a support profile construction, which is provided, for example, in (flat) roof installations.
• the guideway is circular in a plan around the support pole running around and has elevations and reductions to define the different height levels. In a developed state of the guideway, this therefore runs undulating, for example sinusoidal.
• the guideway is formed by the already mentioned cam ring. Curved ring is understood here to mean a rod shaped into a ring, which runs along a predetermined curve.
• a different height level of the guideway is generally transmitted to the photovoltaic module as a function of the rotational or azimuth angle, and thus, in a different way, Depending on the azimuth angle, a defined horizontal angle of inclination of the photovoltaic module is forcibly adjusted.
• the support frame has at least one adjusting device, via which the rotational orientation of the elevation element with respect to the anchoring element and / or the rotational orientation of different subregions of the support mast are mutually adjustable.
• These adjusting devices are used to simplify the assembly or for easy readjustment in the course of operation.
• the configuration of these adjusting devices is based on the recognition that due to the mechanical positive coupling between the vertical and horizontal tracking devices an exact alignment of the support frame in a desired orientation is required.
• the vertical tracking is done via a common drive motor, as provided for example in the tracking device according to EP 1 710 651 B1, there is the problem that due to tolerances and play in the drive train the individual photovoltaic modules occupy a different azimuth angle, ie a different angle of rotation about the vertical axis.
• the advantage is achieved that after commissioning of the system, if due to such play and tolerance effects, the vertical orientation between different support racks is not completely synchronous, the vertical Wheelsteliung individual Traggesteüe in is easily adjustable without the support frame must be rotated in total with respect to the anchoring element.
• the adjusting device for rotational positioning for the elevation element The defined by this guideway with the different height levels must be aligned exactly with respect to the cardinal directions, so that the highest point of the guideway shows exactly south.
• the elevation element is each firmly connected to the anchoring element, for example by welding, etc., so that it depends on a highly accurate orientation of the anchoring element. This is sometimes difficult, especially in a photovoltaic system with a plurality of individual support frames.
• the adjusting device can therefore be made in a simple manner subsequent exact positioning of the elevation element in the desired position.
• the adjusting device for rotational adjustment of the elevation element is preferably independent of the adjusting device for rotational adjustment of the two subregions of the supporting structure with each other. Preferably, they are used in combination, so that a double adjustment possibility is given.
• the elevation element is for this purpose in particular non-rotatably connected with a mounting foot, for example by welding, etc., wherein the mounting foot is reversibly fastened with respect to the anchoring element in different rotational positions.
• the fastening foot and / or the anchoring element has at least one oblong slot guide, in particular curved along a circular path, for a fastening element such as a screw.
• the mounting foot expediently has an, for example, circular mounting plate for surface contact on the anchoring element. This is for easy installation and high mechanical stability.
• the subregions can be mutually reversibly fixed to one another at their point of separation in different rotational positions.
• the two sections of the support mast are connected to each other at the separation point via flanges.
• at least one of the flanges has a preferably along a circular path curved slot guide for a fastener such as a screw.
• the flanges ensure easy assembly and high mechanical stability.
• a spring element is arranged between the coupling element designed, for example, as a fork element and the support mast.
• the spring element which may be preferably formed as a compression spring
• the contact force between the fork element and the example formed in the manner of a cam ring elevation element is reduced.
• the spring element thus counteracts the considerable mass forces of the photovoltaic modules, which would otherwise produce high frictional forces in the absence of a spring element.
• the energy required for the biaxial tracking by the inventively provided spring element can be significantly reduced again, so that a larger number of tracking devices can be driven with a single drive.
• the spring element is preferably arranged such that it exerts on the coupling element a torque which counteracts the torque generated by the photovoltaic module. In this way, the possibly considerable torque that is generated by the photovoltaic module, by means of the spring element is at least partially compensated, so that the forces acting on the cam ring forces are also reduced.
• the low friction between the cam ring and the fork element leads to a reduced need for Antriebse ⁇ ergie.
• the coupling element has at least one rotatably mounted sleeve, with which the coupling element is supported on the guideway of the elevation element.
• the rotatably mounted sleeves roll on the cam ring, so that the tracking requires only a small amount of energy.
• the coupling element is designed in the manner of a fork element with two fingers which grip the elevation element formed as a cam ring between them. The cam ring is therefore guided between the rotatably mounted sleeves.
• a protective sleeve is attached to the support pole in the region of the spring element. Due to the sometimes considerable forces and their variation, there is a risk that the support pole is damaged by the support of the spring element, so that, for example, a protective coating is removed. This is prevented by the protective sleeve, which consists for example of a suitable abrasion-resistant plastic or of a suitable metal.
• the entire support frame is preferably made of metal, which must be weather-resistant due to the required outdoor installation.
• galvanized metal structures are used. Due to the rotational movement of the individual parts to each other this can lead to undesirable signs of wear but also sluggishness. The latter are in particular also due to the surface roughness generated during the galvanizing process.
• a sliding element in particular a sliding sleeve, is arranged between the support mast and the fastening foot on which the support mast is rotatably arranged.
• the sliding element here is preferably arranged loosely and consists of a preferably abrasion-resistant plastic or of a suitable Meiaii.
• the mounting foot in a ver ⁇ Tikale direction oriented stand or guide tube which guides the supporting mast. This is either slipped over the standpipe or plugged into the standpipe.
• a sliding sleeve a radial guide between the support pole and the guide tube is defined at the same time about this.
• the sliding sleeve can extend over the entire length of the guide tube.
• a plurality of sliding sleeves in particular two sliding sleeves, are provided, namely in particular on the two end sides of the guide tube.
• the support mast has a bottom-side flange, with which it is supported on at least a part of the sliding element. If the sliding element is designed as a sleeve, then this sleeve also preferably has a flange.
• a storm protection is provided, which secures the support pole against loosening of the anchoring element and in particular the mounting foot.
• a holding element is preferably provided, which forms an effective axial connection between the mounting foot and the support mast, while still allowing the rotational movement.
• a retaining tab is provided, which is attached to the mounting foot and overlapping the bottom-side flange of the support mast form-fitting, preferably without touching it.
• a drive means for example a
• a friction brake is generally formed in particular by structuring the lateral surface of the driver element.
• a guide slot is preferably introduced for this purpose in the driver element, in which the drive means rests in the mounted state. The rope is therefore in operation in the tensioned state at the in Um- catching direction opposite edges of the guide slot, whereby the friction increases and slippage is prevented.
• the flange of the lower portion of the support mast forms an upper termination for the driver element, i. the separation point is arranged at the upper end of the driver element.
• this flange preferably forms a cover, so that a closed assembly is formed. The storage area of the support mast on the base plate is thereby better protected.
• the tracking device comprises a plurality of supporting frames, to which a common drive is assigned, wherein the actuating movements exerted by the drive are transmitted via a drive means, such as the rope, to the support pole.
• a common drive for example, assigned 10 to 30 supporting frames.
• a photovoltaic system may consist of several such rows.
• the object is further achieved by a method having the features of claim 15. Thereafter, it is provided that the elevation element and / or the upper portion of the support structure are brought into a defined desired position to set up the tracking device with the aid of adjusting devices. Especially in the latter case, at least once
• the subclaims contain, in part, independent inventive concepts, which are also independent of the special design of the adjusting device. direction can be implemented.
• the submission of divisional applications to any of these aspects, regardless of the design of the adjustment devices is reserved.
• FIG. 1 is a simplified representation of a tracking device with several mounted on a respective support frame photovoltaic modules according to the prior art
• FIG. 3 is a fragmentary sectional view of the support frame in the region of a mounting foot
• FIG. 4 shows the partial region shown in FIG. 3 in a perspective view obliquely from below, FIG.
• FIG. 5 shows a side view of a fork element formed as a coupling element with pushed onto fork ends guide sleeves and a pushed on a boom compression spring
• FIG. 8 the tracking device of FIG. 7 from a different perspective.
• FIG. 1 shows a photovoltaic system known from the prior art according to EP 1 710 651 B1 with a two-axis tracking device.
• the photovoltaic system has a multiplicity of supporting frames 2, which each carry a photovoltaic module 4.
• two supporting frames 2 are shown by way of example.
• Each of the photovoltaic modules 4 is pivotable about a vertical axis 6 and about a horizontal pivot axis 8.
• a common drive motor 10 which transmits via a formed in the embodiment as a cable 12 drive means an actuating movement to the respective support frame 2 to exercise a synchronous rotation of the individual support frames 2 about their respective axis 6 for a vertical tracking.
• a vertical tracking forcibly at the same time via a mechanical positive coupling and a horizontal tracking around the pivot axis 8 is exercised.
• each support frame 2 is generally attached via an anchoring element 14 on the ground.
• each support frame 2 is assigned its own anchoring element 14. This includes a bottom plate with an anchoring post driven into the ground.
• a support pole 16 is rotatably arranged on the anchoring element 14.
• the support pole 16 extends in the vertical direction and is oriented concentrically to the vertical axis of rotation 6.
• the support mast 16 is connected to a support frame 18 (cf., in particular, FIG.
• the horizontal pivot axis 8 crosses the support pole 16 and an extension thereof.
• a hollow cylinder trained driver element 20 which is connected for example via connecting struts with the support pole 16.
• the cable 12 is guided around this driver element 20 and preferably wraps around it several times.
• a horizontal tracking device is provided for positively coupled vertical tracking.
• This comprises an elevation element formed in the exemplary embodiment as a cam ring 22, which is a ring element formed concentrically around the support mast 16, which defines a mechanical guideway 24 with different height levels.
• the cam ring 22 is connected via fastening elements 26 fixed to the anchoring element 14.
• the horizontal tracking device comprises a mechanical coupling device, which consists in the embodiment of a Knickarmgestnature.
• This essentially comprises a coupling element 28, which is fastened with its tragmastsei- term end pivotally on this. At its opposite end it is also pivotally connected to a lever arm 30, which in turn is rotatably connected to the support frame 18 (see Fig. 2).
• the coupling point of the lever arm 30 on the support frame 18 is spaced from the horizontal pivot axis 8, so that a vertical adjusting movement of the lever arm 30 leads to a horizontal pivoting.
• the coupling element 28 is forcibly guided by the guideway 24 in a rotational movement about the vertical axis 6, thus travels through the elevation element (cam ring 22) predetermined cam track with the different
• the coupling element 28 is designed as a fork element whose two fork ends surrounds the cam ring 22.
• the photovoltaic system During operation of the photovoltaic system, it depends on a precise alignment of the individual photovoltaic modules 4 for the highest possible efficiency. It has been shown that during commissioning or during operation the problem may arise that, for example due to clearance and tolerance effects in the drive train, the individual support frames 2 and thus photovoltaic modules 4 assume different rotational positions with respect to their rotational position about the vertical axis 6. Furthermore, it has been shown that the exact positioning of the elevation element 22 is difficult in the desired target rotational position. The highest point of the elevation element 22 must be oriented to the south. To solve these problems, a double adjusting device is provided, as will be explained in more detail below in connection with FIGS. 2 to 4.
• the first adjusting device serves to adjust the elevation element 22 in the desired setpoint rotational position with respect to the vertical axis 6.
• This first adjusting device essentially comprises a fastening foot 32 designed as a circular fastening plate in the exemplary embodiment, with which the entire support frame 2 is fastened to the anchoring element 14 is.
• the mounting foot 32 is in this case connected by means of a releasable attachment, in particular screw fastening, with the anchoring element 14, so that after loosening the attachment, the rotational position of the mounting foot 32 is variable.
• the mounting foot 32 has in the embodiment for this purpose two circular arc-shaped slot guides, through which the fastening screws can be inserted.
• the second adjusting device is used to adjust the rotational position about the vertical axis 6 of the respective photovoltaic module 14 in non-exact synchronous alignment with the other photovoltaic modules 4.
• the support pole 16 is divided into an upper portion 36A and a lower portion 36B.
• these two portions 36A, 36B reversibly releasably fastened together in such a way that their relative rotational position is adjustable to one another.
• the separation point is in this case generally arranged below a coupling point at which the coupling device is fastened to the support mast.
• the separation point is arranged above a coupling point at which the driving force exerted by the drive train is transmitted to the support mast 16.
• a respective attachment flange 38 is formed on each end. At least one of the mounting flanges 38 is similar to the mounting foot 32 is formed with slot guides 34.
• the upper portion of the support frame 2 can therefore be easily readjusted in its rotational position without affecting the lower portion 36A, to which the driving force of the drive 10 is transmitted.
• a decoupling possibility between the drive train and the upper portion is generally defined on the separation point.
• the flange 38 of the lower portion 36 B at the same time forms an upper cover of the hollow cylindrical driver element 20.
• a largely closed mecanicholraum is created in which rests in particular the bearing point of the support mast 16 protected.
• the mounting flange 38 is the driver element 20 in particular something
• the mounting flange 38 is preferably arranged above the driver element 20 and its edge sides overlapping.
• the support mast 16 is rotatably mounted on the mounting foot 32.
• the attachment foot 32 comprises a central support tube 40, over which the tubular support mast 16 is slipped over.
• sliding elements are provided on the type of bearing sleeves 42 in the embodiment. These are each arranged in the lower and upper regions of the support tube 40.
• both bearing sleeves 42 have a kind of annular flange.
• the support mast 16 is supported with its lower end, on which it also forms an annular flange, on this annular flange of the bearing sleeve 42, so that a rather flat contact is formed.
• the bearing sleeves 42 consist for example of an abrasion-resistant plastic or of a suitable metal.
• a storm protection 43 is provided for the support mast 16 such that the support mast in particular against an axial lifting of the mounting foot 32 is secured while being rotatable.
• the support mast 16 in particular against an axial lifting of the mounting foot 32 is secured while being rotatable.
• the storm protection 43 is in this case formed in a simple manner by a curved tab, which is fastened with its one end on the mounting foot 32 and projects with its other end on the flange, in particular with a small axial distance.
• the coupling element 28 comprises two forked ends 44.
• a rotatably mounted sleeve 46 is attached to each of the fork ends 44, for example a plastic sleeve or a metal sleeve. When installed, these sleeves 46 roll on the guideway 24. In the embodiment as a fork element of the cam ring 22 is guided between these sleeves 46. As a result, a possible low-friction guidance is achieved, so that the expended driving force from the drive motor 10 can be kept low.
• a shoe sleeve 53 is arranged on the support mast 16.
• the coupling element 28 also has a mounting hole 48 for its articulated connection to the support mast 16.
• the coupling element 28 furthermore has a fastening element designed in the manner of a cantilever 50, on which a spring element 52, in the exemplary embodiment a compression spring, is pushed.
• the spring element 52 is in the built-in! State between the coupling element 28 and the support pole 16 effectively, so is based on the support pole 16 from.
• the spring element 52 exerts a counterforce directed against the weight of the photovoltaic module 4.
• the arrangement of the spring element 42, its size and its spring force / spring constant are therefore suitably selected to exert this counterforce.
• the transmitted to the elevation element 22 contact force is reduced, resulting in a smoother adjustment movement in a tracking movement and the engine 10 is relieved overall. Since the force generated by the spring element 52 force not through the over the mounting hole 48th defined pivot point of the coupling element 28 extends, the spring element 52 generates a torque which is directed in the anti-clockwise direction shown in Fig. 5.
• the spring element 52 acts on the coupling element 28 with the torque, the torque generated by the photovoltaic module 4 is generally counteracted, so that the cam ring 22 is less loaded. Since the forces and moments acting on the cam ring 22 are reduced, the tracking of the photovoltaic module takes place with less expenditure of energy. Likewise, the forces acting on the cable 12 are reduced, so that the drive motor 10 can be made smaller or a larger number can be connected to supporting frames.
• a guide slot 54 which acts in the manner of a friction brake for the cable 12, is furthermore provided in the driver element 20.
• the guide slot 54 extends only over a portion of the lateral surface of the driver element 20.
• the cable 12 is guided over the guide slot 54 around the lateral surface.

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• Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Life Sciences & Earth Sciences (AREA)
• Sustainable Development (AREA)
• Sustainable Energy (AREA)
• Thermal Sciences (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Photovoltaic Devices (AREA)

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• 2009
  • 2009-07-20 DE DE102009034144A patent/DE102009034144A1/de not_active Ceased
• 2010
  • 2010-05-25 EP EP10724285A patent/EP2457036A2/de not_active Withdrawn
  • 2010-05-25 JP JP2012520917A patent/JP2012533892A/ja active Pending
  • 2010-05-25 WO PCT/EP2010/003164 patent/WO2011009508A2/de not_active Ceased
  • 2010-05-25 CA CA2768676A patent/CA2768676A1/en not_active Abandoned
  • 2010-05-25 CN CN2010800323385A patent/CN102575879A/zh active Pending
  • 2010-05-25 AU AU2010275826A patent/AU2010275826A1/en not_active Abandoned
• 2012
  • 2012-01-20 US US13/354,860 patent/US20120152316A1/en not_active Abandoned

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