Patent Application
20170012400
The invention relates to a holding frame according to the preamble of independent main claim 1.
The invention also relates to a method according to the preamble of independent coordinated claim 9.
Holding frames of this type are required in order to receive a plurality of modules of the same kind and/or also a plurality of different modules. By way of example, these modules can be insulating bodies, which are provided as contact carriers for electronic and electrical and possibly also for optical and/or pneumatic contacts. It is particularly important that the holding frame enables a regulation-compliant protective earthing according to plug-type connector standard EN61984, for example for insertion of the holding frame loaded with modules into a metal plug-type connector housing.
A holding frame for supporting plug-type connector modules and for installation in plug-type connector housings and/or for screwing to wall surfaces is known from document EP 0 860 906 E1, wherein the plug-type connector modules are inserted into the holding frame and supporting means on the plug-type connector modules cooperate with recesses provided on opposite wall parts (side parts) of the holding frame, wherein the recesses are formed as openings, which are closed on all sides, in the side parts of the holding frame, wherein the holding frame consists of two halves connected to one another in a hinged manner, wherein the holding frame separates transversely to the side parts of the frame, and wherein hinges are arranged in the fastening ends of the holding frame in such a way that when the holding frame is screwed onto a fastening surface the frame parts are oriented in such a way that the side parts of the holding frame are oriented at right angles to the fastening surface, and the plug-type connector modules are connected to the holding frame in an interlocking manner by means of the supporting means. Holding frames of this type are usually manufactured in practice in a diecasting method, in particular in a zinc diecasting method.
Document EP 2 581 991 A1 discloses a holding frame for plug-type connector modules which has two frame halves, which can be latched to one another by linear displacement of one frame half relative to the other frame half in a direction of displacement, wherein detent means corresponding to one another are provided on each of the frame halves and, in the event of linear displacement, latch the two frame halves to one another in two different latch positions, in which the frame halves are spaced apart from one another at a different distance.
It has been found in practice however that holding frames of this type require complex handling during assembly. By way of example, holding frames of this type must be unscrewed and/or unlatched from the plug-type connector as soon as even just a single module is to be replaced. Here, the other modules, the removal of which was not even desired, might also fall out of the holding frame and then have to be inserted again before the frame halves are screwed together and/or latched. Finally, all modules must be disposed simultaneously in their intended positions already before the frame halves are joined together so as to be ultimately fixed in the holding frame when the frame halves are joined together, which complicates the assembly.
Document EP 1 801 927 B1 discloses a holding frame that consists of a one-piece plastics injection-molded part. The holding frame is formed as a peripheral collar and has, on its plugging side, a plurality of wall segments separated by slots. Each two opposed wall segments form an insertion region for a plug module, wherein the wall segments have window-like openings, which serve to receive protrusions integrally molded on the narrow sides of the modules. A guide groove is also provided in each of the wall segments. The guide groove is formed above the openings by means of an outwardly offset window web, which on the inner side has an insertion bevel. In addition, the plug modules have detent arms, which are integrally molded on the narrow sides in a manner acting in the direction of the cable connections, and which latch beneath the lateral collar wall, such that two independent detent means fix the plug-type connector modules in the holding frame.
In the case of this prior art it is disadvantageous on the one hand that the holding frame is a holding frame formed from plastic, which holding frame is not suitable for protective earthing and therefore is not suitable for installation in metal plug-type connector housings. However, the use of metal plug-type connector housings presupposes a protective earthing of this type and is necessary in many cases, for example on account of the mechanical robustness and temperature resistance of said housings and the electrically shielding properties thereof, and is therefore desired by the customer. It has also been found that the production of the aforementioned plastics holding frames by means of injection molding is at the least problematic and can be implemented only with a high level of effort. Lastly, the heat resistance of a plastics holding frame of this type also is not always sufficient for particular applications, for example in the vicinity of a blast furnace. Lastly, the plastics material and the shape, in particular the strength of the holding frame at the relevant points, are determined primarily by the requirements placed on flexibility and not by those of temperature resistance.
The problem addressed by the invention is that of specifying a design for a holding frame, which on the one hand has a good heat resistance and a high mechanical robustness and in particular enables an appropriate protective earthing, in particular a PE (protection earth), even in the case of installation in a metal plug-type connector housing, and on the other hand also ensures comfortable handling, in particular when replacing individual modules.
This problem is solved in a first aspect with a holding frame of the type mentioned in the introduction by the features of the characterizing part of independent main claim 1.
In a second aspect the problem is solved with a method of the type mentioned in the introduction by the features of the characterizing part of independent coordinated claim 9.
A holding frame of this type can be used in the field of heavy industrial plug-type connectors and can consist at least in part of an electrically conductive material. A protective earthing, in particular a PE protective earthing is thus made possible where appropriate, which can be realized for example in that the holding frame has a PE contact or at least is provided with a PE contact of this type.
The holding frame has a basic portion and a deformation portion, which are formed at least in part from different materials. The basic portion serves to fix a received module in a plane. The deformation portion can assume an insertion state and a holding state, wherein the insertion state allows at least one module to be inserted into the holding frame in a direction transverse to the plane, wherein in the holding state a received module is fixed.
The holding frame can have, by way of example, a basic frame as basic portion and at least one, preferably two cheek parts as deformation portion. The basic frame can then be formed from a different material compared with the cheek parts and therefore advantageously can have a lower elasticity and therefore a greater rigidity compared with the cheek parts.
The deformation portion, in particular the one or more cheek parts, can be formed from a material which is more elastic in accordance with its stress/strain graph, i.e. has a lower modulus of elasticity compared with the material from which the basic portion, in particular the basic frame, is formed. Expressed conversely, the material of the basic portion can be more rigid than the material from which the deformation portion is formed. By way of example, the material of the basic frame can have a modulus of elasticity, in accordance with its stress/strain graph, which is greater than the modulus of elasticity of the material from which the cheek parts are formed.
Here, the value of the modulus of elasticity is all the greater, the greater is the resistance put up by a material in opposition to the elastic deformation thereof. Furthermore, the material from which the deformation portion is formed, in accordance with the stress/strain graph thereof, can have a greater elastic range compared with the material from which the basic portion is formed.
In particular, the basic portion, in particular the basic frame, can be rigid, and in particular can be rigid in an idealized way.
Furthermore, the deformation portion, in particular the cheek part or the cheek parts, can be resilient and advantageously can be manufactured from a resilient sheet metal.
A resilient sheet metal is to be understood here to mean a sheet metal that has resilient properties, for example a reversible deformability, in particular with application of a corresponding restoring force, i.e. for example a sheet metal that is manufactured from spring steel or a comparable material.
Advantageous embodiments of the invention are specified in the dependent claims.
One advantage of the invention therefore lies in the fact that the modules can be individually inserted into the holding frame and removed therefrom again with only very little effort, which in particular facilitates the manual fitting of said modules. The resilient properties of the deformation portion, in particular of the cheek part or the cheek parts, specifically make it possible to insert or to remove modules individually with only very little effort. At the same time, the basic frame, as a result of its rigidity, can ensure the necessary mechanical stability when holding the inserted modules.
Use of one or more metal materials, for example compared with plastic, ensures high temperature resistance and furthermore also a particularly high mechanical robustness of the holding frame, which is advantageous both for the basic portion, in particular the basic frame, and for the deformation portion, in particular the cheek parts.
A further advantage of the use of one or more metal materials lies in the fact that the holding frame, for electrical safety, enables a protective earthing, in particular a PE protective earthing of a metal plug-type connector housing in which the holding frame is inserted. This furthermore also ensures, as an additional advantage, a shielding of the signals transmitted through the plug-type connector. This shielding may be a protection against interfering fields from outside. However, the shielding may also be a shielding for avoiding or reducing emitted interference, i.e. for protecting the environment against interfering fields of the plug-type connector. In other words, not only are the signals transmitted through the modules protected against external interfering fields, but there is also provided a protection of the surroundings from interference produced by a flow of current running through the modules.
A particularly great additional advantage of the use of one or more metal materials furthermore lies in the fact that the holding frame on the one hand is particularly heat-resistant and on the other hand, for example due to the use of resilient sheet metal, still has a sufficiently high elasticity at the necessary points to insert the modules individually and with little effort into the module frame and to remove these again. It is therefore particularly advantageous when the holding frame comprises resilient sheet metal at suitable points, since it is thus much more resistant to heat, with at least just as much elasticity, than a plastics frame which is otherwise functionally comparable from a mechanical viewpoint. Relevant modules can be designed in an accordingly compact manner, such that they can still be fabricated from plastic and are nevertheless relatively resistant to heat.
It is particularly advantageous when the holding frame has a plurality of different regions, for example a first and second region, which have a different elasticity from one another, because a higher section modulus can then be applied purposefully in the region of the highest bending load. The first region can correspond to the basic portion. The second region can correspond to the deformation portion.
These different regions, in particular the basic portion and the deformation portion, can be formed for example from different materials and can thus preferably have different material properties, in particular different moduli of elasticity.
The second region, in particular the deformation portion, can thus have a higher elasticity than the first region, which in particular corresponds to the basic portion. Expressed conversely, the first region can thus have a greater rigidity than the second region. In particular, the first region can be rigid and the second region can be resilient. An elasticity or rigidity of this type can be achieved on the one hand, as already mentioned, by the used material in question and/or can be achieved on the other hand also by the geometric shaping of these regions, in particular of the basic portion and of the deformation portion.
The first region, in particular the basic portion, can be formed for this purpose from a rigid material, for example from a zinc alloy or from an aluminum alloy or from a copper alloy. The second region, in particular the deformation portion, can be formed from a resilient material and therefore can consist by way of example of a resilient sheet steel.
The first region, in particular the basic portion, can be produced in a casting method, for example in a zinc diecasting or aluminum diecasting method or also by milling from, for example, a copper alloy. By way of example, the first region, in particular the basic portion, may preferably be the peripheral basic frame. The basic frame can thus be, in particular, a zinc diecast part. The basic frame can be substantially rectangular in cross section, i.e. has two mutually opposed end faces extending parallel to one another and, at right angles thereto, has two mutually opposed side parts extending parallel to one another, wherein the two end faces are shorter than the two side parts. Here, both the end faces and the side parts can have a substantially rectangular shape.
The second region, in particular the deformation portion, furthermore can be formed by way of example from the at least one, preferably both separate cheek parts, each of said cheek parts preferably consisting of a resilient sheet metal part. The two cheek parts can consist, where appropriate, of the same material, in particular of resilient sheet metal, and in addition can have the same thickness. By way of example, the preferably two cheek parts can be punched out from the same punching sheet.
Each cheek part can be substantially flat and can preferably have a rectangular basic shape. It thus has two mutually opposed, long edges, specifically a first and a second edge, and, at right angles thereto, two mutually opposed short edges, specifically a third and a fourth edge. The cheek part has preferably straight slots, in particular at regular distances starting on its first edge and extending preferably at right angles thereto into the cheek part in the direction of the second edge, whereby freely protruding tabs are formed in the cheek part. Furthermore, a detent window can be arranged as detent element in each of these tabs. These detent windows are intended to receive detent lugs of inserted modules in order to latch the modules in the holding frame. Furthermore, each cheek part can have a plurality of fastening elements, in particular fastening recesses, preferably of round shape, for fastening to the basic frame.
The two cheek parts can advantageously be fastened one to each outer side of the two side parts on the basic frame, such that two resilient tabs of the two cheek parts protrude symmetrically to one another in each case. Furthermore, these tabs can be bent slightly outwardly toward their end, i.e. away from the basic frame and thus away from one another, so as to facilitate the insertion of a module.
At the appropriate side part, preferably at both side parts, the basic frame can have fastening means, for example round fastening pins. These fastening means can engage with the fastening recesses of the relevant cheek part and can thus hold the cheek parts on the basic frame, for example by latching and/or by an interlocking and frictionally engaged connection. Additionally or alternatively, the cheek parts can be fastened to the basic frame by adhesive bonding, welding, soldering, riveting and/or screwing or by any other fastening method.
The appropriate modules can be substantially cuboidal and can have a width on each of two mutually opposed longitudinal sides corresponding to the width of a tab. Each module advantageously has, on each of its two end faces, a detent lug, which likewise can be substantially cuboidal. Each of the resilient tabs of the holding frame advantageously has a detent window, which can be substantially rectangular and which is intended to receive a detent lug of this type, preferably in an interlocking manner.
The two detent lugs of a module can differ from one another, for example in terms of their shape and/or their size, in particular by their length, and the tabs on both sides of the holding frame can have corresponding windows, which likewise differ from one another and which each fit one of the detent lugs in terms of size and/or shape. This has the advantage that the orientation of each module in the holding frame is fixed as a result. In other words, the detent windows and the detent lugs can be used on the basis of their shape and/or size as coding means, in particular as polarization means, for orientation of the modules in the holding frame.
The tabs of the holding frame are advantageously bent away slightly from the holding frame in a freely protruding end region, which simplifies the insertion of the modules. A module can then be inserted into the holding frame in a particularly user-friendly manner. For this purpose, a module specifically is firstly inserted between two tabs of a holding frame and then slides via its two side faces and in particular via the detent lugs integrally molded thereon along the end regions of the tabs bent away from one another. The two tabs thus bend temporarily away from one another until the detent lugs in question are received by the associated detent window of the relevant tab and therefore latch therein. As the detent lugs are received in the relevant detent windows, the tabs preferably spring back into their starting position. The modules can thus latch individually in the holding frame.
At the same time, the module is held fixedly in the preferably rigid basic frame. In order to unlatch the modules again, merely the two relevant tabs have to be bent away from one another again. The relevant module can then be removed individually from the holding frame, whereas the other modules are still latched. A fixed hold of the module in the holding frame alongside a comparatively low actuation force is thus ensured in this way, which is particularly advantageous for the handling.
It is also particularly advantageous that the modules are held with sufficient holding force in the holding frame already by the above-specified construction, and accordingly, besides their detent lugs, require no further detent means, for example detent arms, which facilitates their design and therefore their production effort considerably and at the same time ensures a compact design and therefore also a high heat resistance of the modules and therefore of the entire plug-type connector.
In one embodiment it is particularly advantageous when these two cheek parts are identical, i.e. in spite of the two-part embodiment of the holding frame only cheek parts of one type have to be produced, which in turn reduces the production effort.
In another preferred embodiment the two cheek parts differ at least by the size and/or the shape of their detent windows. This has the advantage that the orientation of each module, which accordingly also has two different detent lugs, is thus fixed. In other words, the detent windows and the detent lugs thus serve on account of their shape as coding means for orientation of the modules.
For earthing protection (PE), the holding frame can be provided with a corresponding PE module, which, for example via an electrically conductive earthing clip, produces electrical contact between an earthing cable attached thereto and the at least partly electrically conductive, in particular metal holding frame. The holding frame can thus be fitted with a PE contact.
Alternatively, the holding frame itself can have a PE contact, for example a screw contact, for the earthing cable. By way of example, a PE contact of this type can be integrally molded on the basic frame.
An exemplary embodiment of the invention is illustrated in the drawing and will be explained in greater detail hereinafter. In the drawing:
The two side parts 12, 12′ each have, at a first edge, a plurality of webs 122, 122′, which are relatively short in the present embodiment and which are arranged in a manner opposite one another symmetrically, wherein the term “short” in this context means that the length of the webs 122, 122′ extending upwardly in the drawing is less than the width of said webs. However, the webs 122, 122′ could also be much longer in a different embodiment. By way of example, the length of the webs could correspond to their width or could even exceed their width. Open recesses 123, 123′ are thus formed between these webs 122, 122′.
In the present example four such open recesses 123, 123′ are provided on each cheek part 2, 2′, however it would also of course be conceivable to provide a different number of recesses, for example three, five, six, seven or eight. The number of open recesses 132, 132′ in each side part 12, 12′ corresponds to the number of modules 3 that the corresponding holding frame is able to receive.
Furthermore, each side part 12, 12′ has a plurality of fastening pins 124, 124′ for fastening the relevant cheek part 2, 2′. In the present case the fastening pins 124, 124′ have a circular shape in cross section; however, any other shape would also be conceivable; for example, the fastening pins 124, 124′ could thus also be oval, rectangular, square, triangular or pentagonal, or could have n corners or could be formed in any other flat shape.
Two cheek parts 2, 2′ are thus provided for the holding frame, specifically a first cheek part 2 and a second cheek part 2′.
A detent window 23, 23′ is provided in each tab 22, 22′ of each cheek part 2, 2′. The detent windows 23 of the first cheek part 2 are larger than the detent windows 23′ of the second cheek part 2′. The two cheek parts 2, 2′ thus differ from one another by the size of their detent windows 23, 23′. Furthermore, additional fastening recesses 24, 24′ are provided in the cheek parts 2, 2′, which recesses have a circular shape in the present exemplary embodiment, but of course could also have any other shape, for example could be oval, rectangular, square, triangular or pentagonal, could have n corners, or could be formed in any other flat shape.
The fastening pins 124, 124′ of the basic frame 1 fit in an interlocking manner into the fastening recesses 24, 24′ of the cheek parts 2, 2′ respectively, such that each cheek part 2, 2′ can be fitted onto the relevant side part 12, 12′. Each cheek part 2, 2′ can additionally also be fastened in another way to the corresponding side part 12, 12′, for example by adhesive bonding, welding, soldering, riveting and/or screwing.
It can be seen in
The module 3 has, on a first longitudinal side 32, a first detent lug 31, which is intended to latch in a detent window 23 of the first cheek part 2. On a second longitudinal side 32′ opposite this first longitudinal side 32, the module 3 has a second detent lug 31′, which is narrower than the first detent lug and which is intended to latch in a detent window 23′ of the second cheek part 2′. The module is also very compact, which improves the heat resistance thereof.
The orientation of the module 3 in the holding frame is fixed by the shape of the detent lugs 31, 31′ and the shape of the windows 23, 23′.
The cheek parts 2, 2′ have, in particular in the region of their tabs 22, 22′, a greater elasticity than the basic frame 1. Expressed conversely, the basic frame 1, which can be produced in a diecasting method, in particular a zinc diecasting method, has a greater rigidity than the two resilient cheek parts 2, 2′, which for example can consist of resilient sheet steel.
This means that a certain force, for example of 10 N, which acts on any tab 22 of a cheek part 2 at the height of the detent window 23 thereof at right angles to the surface of the cheek part 2, directed from the inside out with respect to the holding frame, causes a deflection of the tab 22 to be measured in line with the detent window 23 thereof, which deflection is greater than the deflection experienced by the basic frame 1 at any arbitrary point when a force of equal strength, for example likewise of 10 N, acts on this arbitrary point perpendicularly to the end face 11, 11′ or side part 12, 12′ of said basic frame, directed from the inside out with respect to the basic frame.
The basic frame 1 thus has a greater rigidity than the cheek parts 2, 2′. Expressed conversely, the cheek parts 2, 2′ have a higher elasticity than the basic frame.
The following disclosure is provided on the understanding that the holding frame is fixed at four corner points. By way of example, it can be fixed in or to a metal plug-type connector housing by screwing at the four screw bores 131, 131′ in the flanges 13, 13′ of said holding frame.
If, for example, a force of 10 N acts on the tab 22 of a cheek part 2 at the level of the detent window 23 thereof at right angles to the surface of the cheek part 2, this tab 22 will be reversibly deflected for example over a path of least 0.2 mm, preferably at least 0.4 mm, in particular at least 0.8 mm, i.e. for example more than 1.6 mm. If a force of equal magnitude of 10 N for example acts in the middle of a side part 12 perpendicularly to the surface of the side part 12, acting from the inside out with respect to the basic frame 1, the basic frame 1 will thus be deflected even in this region, in which the rigidity of said basic frame is minimal, only over a path of less than 0.2 mm, preferably less than 0.1 mm, in particular less than 0.05 mm, i.e. for example less than 0.025 mm. The basic frame 1 is thus more rigid than the cheek parts 2, 2′. In particular, the basic frame 1 is considered to be rigid and the cheek parts 2, 2′ are each said to be resilient.
A holding and in particular a latching of the modules is thus provided with high holding force alongside low actuation forces, which significantly facilitates the handling, in particular the insertion and removal of individual modules 3. Lastly, the cheek part 2 is resilient, and the elasticity of the cheek part 2 is selected in particular in accordance with the above-specified values such that the modules 3 can be manually inserted and manually removed. At the same time, the basic frame 1 is rigid, and in particular the rigidity of the basic frame 1 is so high, in particular in accordance with the above-specified values, that the inserted modules 3 are held therein with sufficient strength to ensure the intended function of an associated plug-type connector. The modules 3 and therefore contacts also provided in the modules 3 are thus, specifically, positioned with sufficient geometric accuracy and sufficient mechanical stability to reliably electrically contact corresponding mating contacts of a comparable mating plug.
Such a plug-type connector and a corresponding mating plug, which are not illustrated in the drawing, can additionally have a preferably metal housing, in which a holding frame fitted fully or partially with modules 3 is inserted.
In the holding frame illustrated in
Alternatively, the holding frame itself can have a PE contact of this type, for example a PE screw contact, on its basic frame 1. The PE contact can be integrally molded on the basic frame 1, for example. This can be implemented already during the production of the basic frame 1, for example by means of injection molding.
The invention, however, is in no way limited to this embodiment. Rather, a multiplicity of further embodiments are disclosed, in particular by the following characterizing features and by expedient combination thereof:
The holding frame serves to receive modules 3 of the same type and/or different modules 3, wherein the holding frame can be formed from at least two different materials, of which at least one material is electrically conductive. The holding frame advantageously has resilient properties at least in part. In particular, the holding frame can consist in part of a rigid material and in part of a resilient material.
By way of example, the holding frame can be formed in a number of parts. The holding frame can consist of at least two parts, of which a first part is formed of a first material and a second part is formed of a second material, wherein the modulus of elasticity of the first material is greater than the modulus of elasticity of the second material.
By way of example, the first part can be formed as a basic frame 1 and the second part can be formed as a cheek part 2, 2′. The basic frame 1 can be rectangular in cross section and can have two mutually opposed side parts 12, 12′ extending parallel to one another and two opposed end faces 11, 11′ arranged perpendicularly to said side parts and extending parallel to one another. In particular, the basic frame 1 can be rigid. The basic frame 1 can be formed in one piece. The basic frame 1 can be formed as a diecast part. The at least one cheek part 2, 2′ can be resilient. The at least one cheek part 2, 2′ can be electrically conductive and can also consist of resilient sheet metal.
The at least one cheek part 2, 2′ can be fastened to the basic frame 1, for example by adhesive bonding, welding, soldering, riveting, latching and/or screwing. The at least one cheek part 2, 2′ can have a plurality of slots 21, 21′, by means of which tabs 22, 22′ are formed in the cheek parts 2, 2′. Here, the width of the tabs 22, 22′ can correspond to the width of the modules 3. In particular, all tabs 22, 22′ can have the same width. Each tab 22, 22′ can have a detent means. The detent means can consist of a detent window 23, 23′, which is arranged in the relevant tab 22, 22′. The at least one cheek part 2, 2′ can be, in particular, a punched and bent part. The at least one cheek part 2, 2′ can be constituted by two cheek parts 2, 2′. The holding frame can have a protective earthing contact (PE contact) or can be provided with at least one such contact.
During production thereof, the holding frame, which is intended for a plug-type connector and is suitable for receiving modules 3 of the same type and/or different modules 3, can be formed from at least two different materials.
At least a first part of the holding frame, specifically a basic frame 1, can be produced here in a diecasting method, in particular in a zinc diecasting method.
The at least one cheek part 2, 2′ can be punched out from a resilient sheet metal and in particular can be folded through 180° at least at one bending edge B, B′.
The at least one cheek part 2, 2′ can be fastened to the basic frame 1, in particular by adhesive bonding, welding, soldering, riveting, latching and/or screwing.
The holding frame, by means of its basic frame, can hold a module 3 received therein in one direction and at the same time can fix this module 3 perpendicularly to said direction by means of tabs 13, 13′, 23, 23′ belonging to the relevant cheek part 2, 2′, in particular by latching the module 3 at the tabs 22, 22′ thereof.
1 basic frame
11, 11′ end faces
12, 12′ side parts
122, 122′ webs
123, 123′ open recesses
124, 124′ fastening pins
13, 13′ flanges
131, 131′ screw bores
2, 2′ cheek parts
21, 21′ slots
22, 22′ tabs
23, 23′ detent windows
24, 24′ fastening recesses
B, B′ bending line
K, K′ lower edge
3 module
3′ PE module
31, 31′ detent lugs
32, 32′ front faces
33′ PE contact
34′ earthing clip
35′ earthing screw
| Number | Date | Country | Kind |
|---|---|---|---|
| 10 2013 113 975.2 | Dec 2013 | DE | national |
| 10 2013 113 976.0 | Dec 2013 | DE | national |
This application is a continuation of U.S. patent application Ser. No. 15/030,858 filed Apr. 20, 2016, which in turn is a 371 National Phase Patent Application based on PCT/DE14/100439, filed Dec. 11, 2014, the contents of which is incorporated herein by reference, in its entirety.
| Number | Date | Country | |
|---|---|---|---|
| Parent | 15030858 | Apr 2016 | US |
| Child | 15271128 | US |
