EP4454105A1 - Elektrische maschine mit welligem kopplungselement - Google Patents
Elektrische maschine mit welligem kopplungselementInfo
- Publication number
- EP4454105A1 EP4454105A1 EP22836101.0A EP22836101A EP4454105A1 EP 4454105 A1 EP4454105 A1 EP 4454105A1 EP 22836101 A EP22836101 A EP 22836101A EP 4454105 A1 EP4454105 A1 EP 4454105A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- electrical machine
- coupling element
- stator
- rotor
- shaft
- 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.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
- H02K1/30—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures using intermediate parts, e.g. spiders
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/003—Couplings; Details of shafts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D27/00—Arrangement or mounting of power plants in aircraft; Aircraft characterised by the type or position of power plants
- B64D27/02—Aircraft characterised by the type or position of power plants
- B64D27/30—Aircraft characterised by electric power plants
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/50—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members
- F16D3/76—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive with the coupling parts connected by one or more intermediate members shaped as an elastic ring centered on the axis, surrounding a portion of one coupling part and surrounded by a sleeve of the other coupling part
Definitions
- the present disclosure relates in particular to an electric machine, a vehicle with such an electric machine and a method for producing an electric machine.
- the aim is to continuously improve the target parameters of energy efficiency, power-to-weight ratio, reliability and service life.
- a low weight of the drives is also important for low energy consumption in mobile applications (e.g. in vehicle construction).
- the requirements described apply in particular to use in aircraft.
- External forces can also act.
- side winds or the like can exert axial or radial forces on a shaft connecting the electric motor to the propeller on a propeller driven by an electric motor.
- a correspondingly stiff bearing of the shaft is therefore regularly provided in order to absorb these forces.
- such bearings often have a relatively high weight.
- the forces mentioned can lead to wear of the corresponding components.
- the object of the present invention is to provide an improved electrical machine.
- an electric machine e.g. for a vehicle, in particular for an aircraft
- the electric machine comprises a stator; a rotor rotatable relative to the stator; a shaft rotatable relative to the stator; and a flexible coupling element.
- the coupling element has a first connection section fixed to the rotor and a second connection section fixed to the shaft.
- the two connecting sections have different diameters and are connected to one another via an alternately curved connecting surface.
- This configuration of the coupling element enables an axial and radial translation as well as a tilting movement of the shaft relative to the stator. At the same time, a torque can be transmitted between the rotor and the shaft with the coupling element.
- the connecting surface of the coupling element forms a flexible bellows.
- the coupling element elastically decouples the rotor from the shaft in the axial and radial directions. No lubricant is required for this, so the electric machine can be used particularly well as a direct drive unit without the need for a lubrication system.
- the connecting surface is curved in an alternating manner, e.g. has at least one curve (e.g.
- connection surface can comprise several separated sections.
- the first and/or the second connecting section can be formed by a plurality of partial sections, in particular spaced apart from one another.
- the first and/or the second connection section can be formed by a single, uninterrupted section.
- the shaft can be arranged and aligned concentrically to the rotor. Viewed in the axial direction, the shaft and rotor can overlap. This enables a compact design.
- the stator can be arranged so that it surrounds the shaft on the outside. The shaft can therefore extend into the stator. This also allows for a compact design.
- the rotor surrounds the stator on the outside.
- the electrical machine can therefore be designed as an external rotor.
- the coupling element enables an efficient and robust coupling of the external rotor to the shaft.
- the connecting surface of the coupling element can have annular, in particular mutually coaxial, curved sections, e.g. in the form of annular corrugations. Provision can be made for the coupling element to be of concentrically wavy design. This allows a particularly high degree of flexibility in the axial and radial direction and, at the same time, the transmission of high torques.
- the curved sections have successively, in particular continuously, smaller diameters starting from the first connecting section.
- the first connection section and/or the second connection section can each have a flange. This enables secure attachment.
- the second connecting section has, for example, a polygonal connecting section, for example a cuboid pin. This allows a positive connection and reliable torque transmission.
- the coupling element can be funnel-shaped.
- the connecting sections are, for example, arranged axially offset from one another. At the same time, this allows the bridging of a radial distance and an axial distance between the two connecting sections.
- the coupling element comprises, for example, a flat material, for example sheet steel.
- the coupling element has, for example, a material thickness in the millimeter range, for example less than 2 mm, in particular approximately 1 mm or less. That allows one Transmission of large torques and at the same time low weight.
- different areas of the coupling element have different, in particular significantly different, material thicknesses.
- the coupling element can be designed in one piece. This permits simple production and particularly low wear.
- one opening is formed in the connecting surface. This enables ventilation and also a reduction in weight.
- an edge of the opening (or in each case of the plurality of openings) has a greater material thickness than adjacent areas of the connecting surface. This prevents the edge from tearing.
- connection surface a plurality of openings are formed in the connection surface. This enables effective weight reduction.
- the apertures in the interface may be formed to span a larger area than the intermediate portions of the interface. A particularly effective weight reduction is possible in this way.
- the connecting surface can be formed by several arms. This enables a secure connection and, in turn, a particularly low weight.
- the first connection section can also be formed by a plurality of sections spaced apart from one another. An even further reduction in weight is thus possible.
- the rotor drives a propeller, for example. This allows, for example, the generation of thrust.
- a vehicle is specified, in particular an aircraft.
- the vehicle in particular an aircraft, includes the electric machine according to any configuration described herein.
- the advantages described above are particularly important.
- a method for manufacturing an electrical machine in particular the electrical machine according to any configuration described herein.
- the method includes providing a stator, a rotor mounted so as to be rotatable relative to the stator, a shaft mounted so as to be rotatable relative to the stator, and a flexible coupling element having a first connecting section and a second connecting section which have different diameters and which are connected to one another via an alternatingly curved connecting surface .
- the method also includes mounting the coupling element with the first connection section on the rotor and with the second connection section on the shaft.
- the method includes the preceding step of producing the coupling element by means of deep drawing. This enables a particularly fast and cost-effective production.
- the method also includes the preceding step of producing the coupling element by means of additive manufacturing. This allows a specifically optimized geometry and variable material thicknesses.
- Figure 1 shows an aircraft with several electrical machines for
- Figure 2 is a schematic diagram of one of the electrical machines of the
- Aircraft according to Figure 1 with a stator, a rotor and a coupling element;
- FIG. 3 shows an electrical machine of the aircraft according to FIG. 1 in a perspective view with a view of the coupling element;
- Figure 4 according to the coupling element of the electrical machine
- FIG. 5 shows a cut-away view of the coupling element according to FIG.
- FIGS. 6A and 6B show different steps in the manufacture of the electrical machine according to FIG. 3;
- FIG. 7 shows an electrical machine for the aircraft according to FIG. 1 in a perspective view with a view of a coupling element
- FIGS. 9A-9C different steps in the manufacture of the electrical machine according to FIG. 7;
- FIG. 10 shows a deep-drawing tool for producing the coupling element according to FIG. 4;
- Figure 11 shows a laser build-up welding device for producing the
- FIG. 12 shows a coupling element for the electrical machine according to FIG. 12
- FIG. 13 shows part of a connecting section of the coupling element according to FIG. 12 in a plan view
- FIG. 14 shows part of the connecting section of the coupling element according to FIG. 13 in a side view.
- FIG. 1 shows an aircraft 2 in the form of an air taxi.
- the aircraft 2 comprises a cabin 20 and several, here four, electric machines 1, each in the form of an electric motor.
- Each of the electrical machines 1 drives a propeller 22 .
- each of the propellers 22 is operatively connected to (eg attached to) a rotor of the respective electrical machine 1 .
- a battery 21 supplies electrical power to operate the electrical machines 1 .
- the electrical machines 1 are direct drives.
- FIG. 2 illustrates the basic structure of the electrical machines 1 which are identical to one another in the example according to FIG. 1 .
- the electrical machine 1 comprises a stator 10, a rotor 11 rotatable about an axis of rotation A relative to the stator 10, a shaft 12 rotatable about the axis of rotation A relative to the stator 10, and a coupling element 13 with a first, here ring-shaped, fixed to the rotor 11 Connecting section 130 and a fixed to the shaft 12, here also annular, second connecting section 131.
- the connecting sections 130, 131 have different diameters D1, D2 compared to each other. Furthermore, the connecting sections 130, 131 are connected to one another via an alternately curved connecting surface 132.
- the coupling element 13 allows a particularly simple construction of the electrical machine 1. Furthermore, the coupling element 13 is essentially wear-free and can be adapted to different engine designs.
- the electrical machine 1 is designed as an external rotor.
- the rotor 11 surrounds the stator 10.
- the stator 10 is arranged inside the rotor 11.
- the stator 10 is fixed to a supporting structure.
- the supporting structure is attached to the aircraft 2 .
- the shaft 12 is rotatably mounted on the supporting structure (and/or the stator 10).
- the shaft 12 is arranged coaxially and concentrically with the rotor 11 and the stator 10 .
- the stator 10 is thus arranged between the rotor 11 and the shaft 12 . There is a clearance between the rotor 11 and the shaft 12 .
- the coupling element 13 bridges this distance.
- the coupling element 13 is wavy.
- the coupling element 13 is flexible and allows an axial movement (along the axis of rotation A) and a radial movement (perpendicular to the axis of rotation A) of the shaft 12 relative to the rotor 11. Tilting movements of the shaft 12 relative to the rotor 11 are also made possible.
- the geometry of the coupling element explained in detail below, ensures a transmission of torques about the axis of rotation A between the rotor 11 and the shaft 12 .
- the propeller 22 is operatively connected to the shaft 12, namely fastened to the shaft 12 in the present case.
- the propeller 22 can be rotated via the shaft 12 by rotating the rotor 11 relative to the stator 10 .
- the coupling element 13 is connected to the rotor 11 lying on the outside.
- the first connection portion 130 is ring-shaped.
- the second connection section 131 is also ring-shaped.
- the coupling element 13 is funnel-shaped. It thus forms a depression that can be described as trough-shaped.
- the connecting sections 130, 131 are offset from one another in the axial direction.
- the first connecting portion 130 has a flange 133 and the second connecting portion 131 has a flange 134 .
- the flange 133 of the first connecting portion 130 is ring-shaped and has a larger diameter D1 than the flange 134 of the second connecting portion 131 (diameter D2).
- the first connection section 130 forms a circular outer edge of the coupling element 13 .
- the second connection portion 131 forms a circular opening 138 .
- the flange 133 of the first connecting section 130 and the flange 134 of the second connecting section 131 extend in mutually parallel planes.
- the alternately curved connecting surface 132 extends between the first connecting section 130 and the second connecting section 131.
- the connecting surface 132 has a plurality (here 11, generally e.g. two or more, in particular more than 3, more than 4, more than 5 or more than 10) annular curved sections, some of which are designated K1-K4.
- the curved sections K1 -K4 are aligned coaxially with one another.
- the curved sections K1 -K4 form circular steps.
- the connecting surface 132 is wavy.
- the coupling element 13 has areas that are alternately curved to the left and to the right.
- the coupling element 13 has alternating concave areas and convex areas.
- the outer curved sections have a greater width in the direction perpendicular to the axis of rotation A than the inner curved sections.
- the annular curved sections have a width that becomes progressively smaller (in the direction perpendicular to the axis of rotation A), viewed from the outside inwards.
- the outermost curved sections K1, K2 also have larger radii of curvature in a plane extending perpendicularly through the axis of rotation A (ie in the section according to FIG. 5) than the inner curved sections.
- Planar sections (having surfaces parallel to the axis of rotation A) and cylindrical sections are provided alternately between a plurality of the annular curved sections.
- the coupling element 13 forms a bellows.
- the coupling element 13 can also be referred to as a coupling bellows.
- Figure 6A illustrates the alignment of the coupling member 13 to the rotor 11 and stator 10 assembly prior to assembly thereon.
- the stator 10 has fins for cooling the coils.
- the rotor 10 is rotatably mounted on the stator 10 by means of at least one, in particular several, in this case two, bearings 15 .
- one end of the shaft is 12 1, on which the shaft 12 is journalled by means of a bearing 16, here on a portion of the supporting structure on which the stator 10 is also mounted.
- the electrical machine 1 is in the form of a transverse flux motor.
- the rotor 11 has a magnet holder 110 on which several magnets 11 are fixed, here in the form of permanent magnets.
- the stator 10 has a coil holder 100 to which electrical coils are fixed.
- the coils can be supplied with electric current, e.g. an alternating current, in particular a three-phase alternating current.
- a rotating magnetic field is generated, through which a force is exerted on the magnets 11 , which then causes the rotor 11 to rotate about the axis of rotation A relative to the stator 10 .
- the magnetic fields act in the axial direction.
- the coupling element 13 is inserted into the stator 10 and fixed.
- FIG. 6B shows the assembled state, with the second connecting section 131 being fastened to the shaft 12 by means of screws 14 .
- the first connecting portion 130 can be welded to the rotor 11, fastened thereto in a force-fit manner, or also with screws or the like.
- the first connecting section 130 rests on the rotor 11 on an end face of the rotor 11 . Proceeding from this, the connecting surface 132 initially forms an annular bead directed away from the shaft 12 in the axial direction and then extends in a wavy, funnel-shaped manner towards the shaft 12 .
- the coupling element 13 is a deep-drawn part. It is made from a flat material, namely a steel sheet in the present case. In particular, it would also be possible to produce the coupling element from titanium. In particular, it is possible to use such materials that are already approved for aviation. Alternatively, it is conceivable to produce the coupling element from plastic.
- the coupling element 13 has a material thickness in the millimeter range. The material thickness is of the same order of magnitude in all areas of the coupling element 13 . For example the material thickness is anywhere in the range of +/- 50% around a value, in particular in the range of +/- 10% around a value. In the present case, the value of the material thickness is 1 mm.
- the coupling element 13 is designed in one piece. Furthermore, the coupling element 13 is made of the same material.
- a deep-drawing tool 3 is used for production. This has an upper tool half and a lower tool half. A metal sheet B is inserted between these. Then the tool halves are pressed together so that the metal sheet is formed between them and the coupling element 13 is formed.
- FIG. 7 shows an electrical machine T that is constructed like the electrical machine 1 described above, the only difference being that in the electrical machine T according to FIG. 7, a differently manufactured and slightly differently shaped coupling element 13′ is installed.
- the second connecting section 13T of the coupling element 13′ has a form-fitting element in addition to the flange 134, here in the form of a polygonal connecting section 135.
- the polygonal connecting section 135 has a polygonal, here quadrangular, outer circumference.
- the bending portions are uniformly wavy.
- the bend sections have (approximately) the same widths and heights (generally the same widths and/or heights) as one another.
- some or all of the curved sections have different widths and/or heights from one another.
- the material thickness is very different in different areas of the coupling element 13', e.g. by more than a factor of 2, more than a factor of 5 or even more than a factor of 10.
- the flange 134 is significantly thicker than the connecting surface 132.
- One or more openings 136 are optionally formed in the coupling element 13', for example in the connecting surface 132, as illustrated in FIG.
- the opening 136 is for ventilation.
- An edge 137 of the opening 136 is thicker than surrounding areas of the connection surface, ie with a greater material thickness. As a result, stresses in the edge area can be held better.
- the coupling element 13' is produced by means of additive manufacturing, e.g. with a 3D printer.
- the coupling element 13' is produced by means of laser build-up welding.
- the coupling element is produced additively using a laser build-up welding device 4 illustrated in FIG. Material is applied in several layers and melted with a laser. This manufacturing method allows a particularly large degree of freedom in the geometry of the coupling element 13'.
- Figures 9A to 9C show different stages in the manufacture of the electrical machine 1 '.
- the coupling element 13' is inserted and fastened.
- the polygonal connecting section 135 engages in a suitably designed receptacle 120 on an axial end of the shaft 12 in order to form a form-fitting connection.
- FIGS 12 to 14 show a further coupling element 13 ", which the electrical machine 1 according to Figure 3 and the electrical machine 1 'according to Figure 7 optionally instead of the illustrated there coupling element 13; 13' may include.
- the coupling element 13" of Figures 12 to 14 has a first connection section 130' that can be fixed on the rotor 11 (and is fixed in the assembled state) and a second connection section 131" that can be fixed on the shaft 12 (and is fixed in the assembled state), which have different diameters and are connected to each other via an alternately curved connecting surface 132'.
- the connecting surface 132 ' has a plurality of sections, each of which by a Arm R are formed.
- An opening 136′, 136′′ is formed between each two adjacent arms R.
- the openings 136', 136'' span a larger area than the arms R. Some (here five) of the openings 136' have a closed edge. Others (here also five) of the openings 136'' have an open edge.
- the coupling element 13′′ is star-shaped in the present example.
- the first connecting section 130′ is formed by a plurality of partial sections S, in this case five, which are spaced apart from one another in the circumferential direction.
- the sections S are each in the form of a circular arc.
- the sections S are arranged together along a circle.
- the second connecting section 131'' is circular in shape.
- Each of the arms R extends from a lug 139 on the second connecting section 131'' to a section S of the first connecting section 130'.
- Two arms R each extend from a common extension 139 on the second connecting section 131′′.
- Two arms R each extend to a common partial section S of the first connecting section 130'.
- Each arm R is joined to two different arms at the first connection section 130' and at the second connection section 131''.
- An arm R (here each arm R) starts with a first other arm R from a lug 139 and opens with a second other arm R at a section S, the first other arm R and the second other arm R being spaced from each other.
- the respective arm R is arranged between the first and the second other arm R .
- the arms R each have a bend (in the circumferential direction). In this case, the bend in adjacent arms R is alternately oriented in the opposite direction. Viewed from the lug 139, the two arms R extending therefrom are bent away from each other at the respective bend. Each of the two arms R opening out at a partial section S of the first connecting section 130′ are inclined towards one another (here in a V-shape).
- the coupling element 13'' is here formed in one piece. It can, for example, be manufactured as a stamped and bent part or by additive manufacturing.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Motor Or Generator Frames (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021214730.5A DE102021214730A1 (de) | 2021-12-20 | 2021-12-20 | Elektrische Maschine mit welligem Kopplungselement |
| PCT/EP2022/085623 WO2023117585A1 (de) | 2021-12-20 | 2022-12-13 | Elektrische maschine mit welligem kopplungselement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4454105A1 true EP4454105A1 (de) | 2024-10-30 |
Family
ID=84820399
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22836101.0A Withdrawn EP4454105A1 (de) | 2021-12-20 | 2022-12-13 | Elektrische maschine mit welligem kopplungselement |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20250132635A1 (de) |
| EP (1) | EP4454105A1 (de) |
| DE (1) | DE102021214730A1 (de) |
| WO (1) | WO2023117585A1 (de) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11824410B1 (en) | 2023-01-11 | 2023-11-21 | Rolls-Royce Deutschland Ltd & Co Kg | Electrical machines for aircraft power and propulsion systems |
| GB2626145A (en) | 2023-01-11 | 2024-07-17 | Rolls Royce Deutschland Ltd & Co Kg | Electrical machines for aircraft power and propulsion systems |
| US11990805B1 (en) | 2023-01-11 | 2024-05-21 | Rolls-Royce Deutschland Ltd & Co Kg | Electrical machines for aircraft power and propulsion systems having a defined machine parameter based on a ratio between an active parts torque density and a power factor |
| GB2627179A (en) | 2023-01-11 | 2024-08-21 | Rolls Royce Deutschland Ltd & Co Kg | Electrical machines for aircraft power and propulsion systems |
| US11827371B1 (en) | 2023-01-11 | 2023-11-28 | Rolls-Royce Deutschland Ltd & Co Kg | Electrical machines for aircraft power and propulsion systems |
| DE102024106633A1 (de) * | 2024-03-07 | 2025-09-11 | Rolls-Royce Deutschland Ltd & Co Kg | Elektrische Maschine mit einem Verbundwerkstoff |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1445272A (en) | 1921-06-17 | 1923-02-13 | Edwin R Gill | Universal joint for power transmission |
| US5219314A (en) | 1990-08-10 | 1993-06-15 | Caterpillar Inc. | Flexible driving transmitting coupling |
| DE10012662B4 (de) | 2000-03-15 | 2010-11-04 | Geräte- und Pumpenbau GmbH Dr. Eugen Schmidt Merbelsrod | Kühlmittelpumpe mit elektrisch kommutiertem Elektromotor |
| JP2005094819A (ja) * | 2003-09-12 | 2005-04-07 | Fujitsu General Ltd | 電動機 |
| WO2008014253A2 (en) | 2006-07-24 | 2008-01-31 | The Timken Company | Electric motor with axially deformable rotor assembly |
| DE102008054475A1 (de) * | 2008-12-10 | 2010-06-17 | Zf Friedrichshafen Ag | Antriebsstrang für ein Kraftfahrzeug |
| WO2011096052A1 (ja) * | 2010-02-03 | 2011-08-11 | トヨタ自動車株式会社 | ロータ |
| EP2667485B1 (de) * | 2012-05-25 | 2014-11-19 | Compound Disk Drives GmbH | Elektromotor und Lagerungsanordnung |
| DE102014220494A1 (de) | 2014-10-09 | 2016-04-14 | Zf Friedrichshafen Ag | Rotorträger für Hybridmodul |
| US11962200B1 (en) * | 2023-11-10 | 2024-04-16 | Rivian Ip Holdings, Llc | Stator busbar |
-
2021
- 2021-12-20 DE DE102021214730.5A patent/DE102021214730A1/de active Pending
-
2022
- 2022-12-13 WO PCT/EP2022/085623 patent/WO2023117585A1/de not_active Ceased
- 2022-12-13 US US18/721,860 patent/US20250132635A1/en active Pending
- 2022-12-13 EP EP22836101.0A patent/EP4454105A1/de not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| DE102021214730A1 (de) | 2023-06-22 |
| WO2023117585A1 (de) | 2023-06-29 |
| US20250132635A1 (en) | 2025-04-24 |
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| STAA | Information on the status of an ep patent application or granted ep patent |
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