EP4445047A1 - Antriebssystem und antriebsgetriebe - Google Patents
Antriebssystem und antriebsgetriebeInfo
- Publication number
- EP4445047A1 EP4445047A1 EP22803164.7A EP22803164A EP4445047A1 EP 4445047 A1 EP4445047 A1 EP 4445047A1 EP 22803164 A EP22803164 A EP 22803164A EP 4445047 A1 EP4445047 A1 EP 4445047A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cavity
- drive
- fluid
- flow
- transmission
- 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- Withdrawn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
-
- 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
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/042—Guidance of lubricant
- F16H57/0421—Guidance of lubricant on or within the casing, e.g. shields or baffles for collecting lubricant, tubes, pipes, grooves, channels or the like
- F16H57/0423—Lubricant guiding means mounted or supported on the casing, e.g. shields or baffles for collecting lubricant, tubes or pipes
-
- 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
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0409—Features relating to lubrication or cooling or heating characterised by increasing efficiency, e.g. by reducing splash losses
-
- 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
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/042—Guidance of lubricant
- F16H57/0421—Guidance of lubricant on or within the casing, e.g. shields or baffles for collecting lubricant, tubes, pipes, grooves, channels or the like
- F16H57/0426—Means for guiding lubricant into an axial channel of a shaft
-
- 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
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/045—Lubricant storage reservoirs, e.g. reservoirs in addition to a gear sump for collecting lubricant in the upper part of a gear case
-
- 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
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/045—Lubricant storage reservoirs, e.g. reservoirs in addition to a gear sump for collecting lubricant in the upper part of a gear case
- F16H57/0453—Section walls to divide a gear sump
-
- 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
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0457—Splash lubrication
-
- 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
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0467—Elements of gearings to be lubricated, cooled or heated
- F16H57/0469—Bearings or seals
- F16H57/0471—Bearing
-
- 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
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/048—Type of gearings to be lubricated, cooled or heated
- F16H57/0482—Gearings with gears having orbital motion
- F16H57/0483—Axle or inter-axle differentials
Definitions
- the invention relates to a drive system, comprising a drive unit with a drive housing. Furthermore, the invention relates to a drive transmission, which includes the drive system.
- Integrating a drive unit with several electric rotating machines in a drive arrangement that is intended for a hybrid motor vehicle is subject to strict installation space requirements, particularly in the axial direction.
- hybrid transmissions with two electrical machines which enable switching between serial operation and parallel operation.
- serial operation an internal combustion engine drives a first electric machine that works as a generator. The electrical energy thus generated is used to drive the second electrical machine, the torque of which is transmitted to the wheels of a motor vehicle equipped with the hybrid transmission.
- rotating and mutually rubbing elements are lubricated and cooled with a lubricant such as oil.
- a lubricant such as oil.
- Lubricant can be transported from this sump by entrainment on gears on meshing gears and/or on other gears or bearing points.
- a pump can also be arranged in fluidic connection with the oil sump in order to transport the lubricant to the points to be lubricated.
- the design of the volume of the oil sump and/or the performance of the pump has a major impact on the lubrication to be achieved.
- the drag torque depends, among other things, on how deep each gear wheel is immersed in the oil sump, the distances between the rotating gear wheels and the gear housing, how large the acceleration of the lubricant moved by the pump is, and whether there are pressure losses when the lubricant is transported.
- An oil interception mechanism is known from EP 3 534 042 A1, which implements lubrication within the gear compartment.
- a wheel of a differential gear a so-called differential wheel, is immersed in oil in a separate chamber of the oil sump in order to ensure that only the amount of oil that is actually required is accelerated by the differential wheel. This reduces the drag losses of the transmission.
- the object of the present invention is to provide a drive system and a drive gear comprising the drive system, with which in a simpler, more cost-effective and space-saving manner Way lubrication connected or integrated gear elements is made possible.
- the invention relates to a drive system for a motor vehicle, comprising a drive unit with a drive housing and a flow guide element which is mechanically fixed to the outside of the drive housing and has at least one first cavity boundary for at least regionally forming a first fluid reservoir. Provision is made for a first cavity, which is delimited at least in regions by the first cavity delimitation, to be fluidically connectable or connected to a lubrication device.
- the drive unit can have at least one electric machine, which can optionally also be operated as a generator.
- the flow guide element can be connected directly to the drive housing, or also indirectly, possibly also via a gear housing mechanically coupled to the drive housing.
- a fluid in the sense of the present invention is a liquid lubricant which can also have a cooling function, such as oil.
- the cavity boundary is configured to define a cavity and contain a fluid therein which forms a reservoir.
- a lubrication of a unit to be lubricated can be realized outside of the drive unit, but carried by the drive unit.
- the flow guide element can have at least one second cavity delimitation for at least regionally forming a second fluid reservoir, a second cavity delimited at least in regions by the second cavity delimitation being fluidly connectable or connected to the lubrication device.
- the flow guide element can be designed to be open on one side if it is sealed on the open side by an adjoining gear housing. This has the advantage that the flow guide element requires only very little axial space.
- the flow guide element can be made of plastic. This enables tolerances to be compensated for by slight deformation of the flow-guiding element and, correspondingly, a simple adjustment of the flow-guiding element to the given geometric conditions.
- the flow guide element forms a flow channel at least in regions for supplying fluid into at least one of the cavities.
- a flow bifurcation can be formed in the flow channel for supplying fluid to the first cavity and to the second cavity.
- Fluid can be directed along this rib by means of a rib, which can be formed by the flow guide element or by a transmission housing that rests on the flow guide element, with the flow branching in the form of a Opening is arranged next to the rib such that the fluid flowing at a flow velocity below a limit velocity flows with a first subset through the opening into the first cavity and with a second subset flows further along the rib into the second cavity.
- a rib which can be formed by the flow guide element or by a transmission housing that rests on the flow guide element, with the flow branching in the form of a Opening is arranged next to the rib such that the fluid flowing at a flow velocity below a limit velocity flows with a first subset through the opening into the first cavity and with a second subset flows further along the rib into the second cavity.
- the flow guide element can have an impact element for realizing an impact effect for a fluid hitting the impact element at a speed above a limit, for the purpose of distributing the fluid through the flow branch into the first cavity and into the second cavity.
- the second cavity can have an overflow device, by means of which fluid can flow into the first cavity when a limit level in the second cavity is exceeded.
- the first cavity is located at a lower height than the second cavity, so that fluid can flow from the second cavity into the first cavity due to gravity.
- each bearing point of a shaft has an oil reservoir available from which the respective bearing point can be lubricated.
- the flow guide element has a flow inlet which is located above both cavities when the flow guide element is aligned in an intended use position. In this way, the fluid can flow from the flow inlet into a respective cavity due to the force of gravity.
- the intended use position relates to the position of the flow control element after installation in a motor vehicle, so that the flow control element is located between the drive system and the transmission housing, which are arranged essentially horizontally next to one another.
- a further aspect of the present invention is a drive transmission comprising a drive system according to the invention, the drive transmission also comprising a transmission with a transmission housing and at least one cavity which is at least partially delimited by a cavity delimitation is axially delimited on one side by the outside of the transmission housing.
- the transmission housing is located axially next to the drive housing.
- the present invention is not necessarily restricted to the fact that a cavity delimited at least in certain areas by a cavity delimitation is delimited axially on one side by the outside of the gear housing, but the drive gear can also be designed in such a way that a cavity delimited at least in certain areas by a cavity delimitation is axially limited on both sides and given if fully limited by the flow guide.
- the lubrication device can be formed in or on a bearing of a differential wheel shaft and/or a bearing of an intermediate wheel shaft of the transmission connected to the drive unit.
- a respective channel can be formed in the transmission housing, which is fluidically connected to at least one of the cavities.
- the fluid from at least one of the cavities can also be used to lubricate meshing gears.
- the drive gear comprises a differential gear with a differential gear, the differential gear having the function of an impeller pump and being arranged and designed such that a fluid volume flow conveyed by means of the differential gear can be fed to the flow guide element.
- the differential wheel is one of the wheels of the differential gear; in particular a wheel whose axis of rotation runs parallel to an output shaft of the drive system.
- the gear wheel is partially covered by a cover element on its circumference and on the outside of the drive gear, so that there is a gap between the radial outside of the gear wheel and the cover element, the width of the gap being so small that that with the differential gear a conveying effect on the fluid along the direction of rotation of the differential wheel can be realized.
- the cover element seals the drive gear from the outside, so that no fluid can escape.
- the cover element forms part of a housing in which the differential wheel runs, in order to realize the delivery of fluid here using the principle of the impeller pump. Accordingly, it is provided that the cover element has only a minimal radial distance from the external toothing of the differential wheel in order to achieve the conveying effect.
- the drive gear can be set up in such a way that the gear housing accommodates a fluid volume in the lower region, in which the differential wheel is immersed and from which the differential wheel takes fluid with it during its rotational movement.
- the space in the transmission housing that delimits this fluid volume can be divided into a first partial space and a second partial space.
- the two subchambers are separated from one another by a dividing wall, which makes it possible to set a lower fluid level or a lower fill level of the fluid in the first subchamber, into which the differential wheel extends, than in the adjacent second subchamber.
- the second subchamber is fluidically connected to a pump which is set up to deliver fluid into the second subchamber. Because of a fluidic connection between the second partial space and the first partial space, fluid can flow from the second partial space into the first partial space.
- the volume flow that can flow through the control-technical connection between the second subchamber and the first subchamber is set or adjustable in such a way that it is ensured that the differential gear constantly takes fluid with it during its rotation and supplies it to the flow guide element and thus also to the bearing points.
- the drive system can have a flow divider for dividing the fluid volume entrained by the differential wheel in its rotational movement into at least two fluid flows, essentially at an angle to the conveying direction of the fluid by means of the differential wheel.
- the angle can be between 30° and 90° in relation to the conveying direction, which is characterized by an ideal direction running tangentially to the circumference of the differential wheel. Accordingly, the result is that the divided partial volume flows are guided away axially on both sides of the differential wheel.
- the flow divider has a separating element which is arranged axially offset with respect to the axial center of the gear wheel in order to keep the fluid volume entrained by the differential wheel in its rotational movement in its axial center to share.
- the transmission housing can have a raised structure on its outside, with the flow guide element being adapted to the structure in a contact area on the outside of the transmission housing in terms of shape and size in a complementary manner.
- the flow guide element is fastened to the transmission housing by means of fastening elements such as fastening bolts.
- the structure may include ribs.
- a structural element or such a rib can also delimit at least one of the cavities in a liquid-tight manner.
- the flow guide element can also be sealed on such a structural element or on such a rib.
- Such a structural element or such a rib can bear against the flow-guiding element and can be used to fix the flow-guiding element to the transmission housing and/or to seal between the flow-guiding element and the transmission housing.
- This embodiment thus combines a high mechanical load capacity of the transmission housing due to the configuration with at least one structural element, with the liquid-tight arrangement of the flow guide element on the transmission housing.
- the invention also includes a drive arrangement with a drive transmission according to the invention, which has at least one drive element for driving a motor vehicle, which is mechanically coupled or can be coupled to the differential wheel.
- the drive arrangement can also comprise an internal combustion engine which is or can be coupled by means of an output element to an input of the drive system, and thus optionally to a rotor of an electric rotary machine of the transmission system.
- the respective mechanical coupling can be implemented by means of a coupling or by means of a rigid, non-rotatable connection.
- FIG. 1 a flow guide element in a perspective view
- Figure 2 the flow control element in a frontal view
- Figure 3 the flow guide element in a perspective view
- Figure 4 a section of a gear housing
- FIG. 5 another detail from a gear housing in a perspective view
- Figure 6 a drive unit in an axial view
- FIG. 7 an axial end area of the drive unit in a perspective view
- FIG. 8 an enlarged perspective view of the axial end area of the drive unit
- Figure 9 the drive gear in a perspective view.
- the flow guide element 40 is designed as a plastic part. In the upper area it comprises a flow inlet 41 in order to be able to receive a fluid 30 here, as indicated in FIG.
- the flow guide element 40 forms a first cavity delimitation 42 for the realization of a first cavity 43 for the purpose of accommodating a first fluid reservoir 44, which can be seen in FIG.
- FIG. 2 shows a view of the flow guide element 40 in a section through an adjacent transmission housing.
- the flow guide element 40 forms a second cavity boundary 45 for the realization of a second cavity 46 for the purpose of accommodating a second fluid reservoir 47, as also shown in FIG.
- the flow guide element 40 To feed the fluid 30 into the two cavities 43, 46, the flow guide element 40 forms a plurality of flow channels 50, through which a flow of the fluid 30 along the arrows shown in FIG. 1 is made possible.
- the embodiment of the flow guide element 40 illustrated in Figures 1 -2 also comprises at least one rib 52, which implements a flow branch 51 through an opening 53 arranged therein or on it, in order to supply a first subset 54 to the first fluid reservoir 44 at this flow branch 51 , and to supply a second portion 55 to the second fluid reservoir.
- the division into a first subset 54 and a second subset 55 of the fluid 30 occurs simply due to the force of gravity when the flow speed of the fluid 30 is below a limit speed, in that the first subset 54 passes through the opening 53 into the first cavity 43, and a second subset 55 further along the rib 52 to the second cavity 46 .
- the flowing fluid 30 has a speed above the limit speed, it splashes or flows against an impact element 56 which is arranged downstream of the opening 53 .
- This baffle element 56 causes the fluid volume flow entering through the flow inlet 41 to be decelerated, and it is therefore still possible for a first partial quantity 54 to pass through the opening 53 into the first cavity 43, and a second partial quantity 55 to pass along the rib 52 in the second cavity 46 reaches.
- the two cavities 43, 46 are each fluidically coupled to a lubrication device 60, which is only indicated in FIGS.
- FIG. 3 shows the flow guide element 40 again in a perspective view, the cavity boundaries 42, 45 being clearly visible here, which also serve to abut and seal against an axially opposite transmission housing 71, which is shown in regions in FIG. In the two figures 3 and 4, the respective contact contour is highlighted.
- the flow guide element 40 makes it possible to supply lubricant or fluid 30 to these bearing points 85 in a simple and space-saving manner.
- FIG. 5 shows a component of the lubricating device 60 in the form of a channel 90 which is embodied on the bearing of the intermediate wheel shaft 85. It can be seen here that lubricant can be supplied directly to the bearing or to the intermediate wheel shaft itself through the channel 90 .
- FIG. 6 shows the drive unit 1 in an axial view, without the flow guide element.
- the drive unit 1 comprises a drive housing 20, from which an electric motor shaft 86 leads out axially.
- an intermediate gear shaft 83 with an intermediate gear 84 arranged thereon Positioned axially outside of the drive housing 20 are an intermediate gear shaft 83 with an intermediate gear 84 arranged thereon, and a differential gear shaft 80 with a differential gear 81 arranged thereon.
- the differential wheel 81 is surrounded on its outside by a covering element 100 which creates a very small gap 110 between itself and the differential wheel 81 .
- the differential wheel 81 protrudes with its lowest area into a first partial space 120 of an oil reservoir.
- There is a fluidic connection between the two subtrees 120 , 121 which allows fluid 30 to flow from the second subspace 121 into the first subspace 120 .
- differential wheel 81 rotates in the direction of rotation shown, differential wheel 81 conveys fluid 30 like an impeller pump from the first subchamber through gap 110 between differential wheel 81 and cover element 100.
- fluid 30 like an impeller pump from the first subchamber through gap 110 between differential wheel 81 and cover element 100.
- the fluid 30 conveyed by the differential wheel 81 is supplied to a flow divider 130, which is shown in FIGS.
- the flow divider 130 comprises a separating element 131, which essentially bisects the fluid volume flow conveyed by the differential wheel 81 axially, so that fluid 30 runs axially on both sides along the guide elements 132 shown in FIG of the differential gear 81 is divided and routed away.
- the partial volume flow of the fluid 30 diverted to the right according to FIG. 8 then reaches the flow inlet 41 of the flow guide element 40, as described for FIG.
- FIG. 9 shows a drive gear in which, however, the drive housing has been omitted.
- An electrical machine 10 is clearly visible here.
- the differential wheel shaft 80 can also be seen, as well as the bearing of the differential wheel shaft 82 and the flow divider 130.
- the transmission 70 and the transmission housing 71 can also be seen in this view, whereby it can be seen that the Cover element 100 forms the transmission housing 71 in the region of the superimposition of the differential gear, which is covered here.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Details Of Gearings (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021132153.0A DE102021132153B3 (de) | 2021-12-07 | 2021-12-07 | Antriebssystem und Antriebsanordnung |
| PCT/DE2022/100817 WO2023104230A1 (de) | 2021-12-07 | 2022-11-07 | Antriebssystem und antriebsgetriebe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4445047A1 true EP4445047A1 (de) | 2024-10-16 |
Family
ID=84358632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22803164.7A Withdrawn EP4445047A1 (de) | 2021-12-07 | 2022-11-07 | Antriebssystem und antriebsgetriebe |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20250043860A1 (de) |
| EP (1) | EP4445047A1 (de) |
| KR (1) | KR20240051262A (de) |
| CN (1) | CN118355215A (de) |
| DE (1) | DE102021132153B3 (de) |
| WO (1) | WO2023104230A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118815900A (zh) * | 2023-04-17 | 2024-10-22 | 宁德时代(上海)智能科技有限公司 | 一种引流组件、传动机构及驱动总成 |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3529698A (en) * | 1967-05-05 | 1970-09-22 | Gen Electric | Self-operating lubrication system for gear drive units |
| US4630711A (en) | 1984-06-27 | 1986-12-23 | Societe Anonyme D.B.A. | Device for lubricating a geartrain |
| JP5689049B2 (ja) * | 2011-11-22 | 2015-03-25 | 本田技研工業株式会社 | 変速機のオイルガタープレート、及びそれを備えた変速機 |
| JP2013119918A (ja) | 2011-12-08 | 2013-06-17 | Aisin Seiki Co Ltd | 動力伝達装置 |
| CN105650255B (zh) * | 2014-11-27 | 2019-06-04 | 爱知机械工业株式会社 | 油槽及具备该油槽的变速器 |
| DE102015214339A1 (de) | 2015-07-29 | 2017-02-02 | Volkswagen Aktiengesellschaft | Antriebsanordnung für ein Kraftfahrzeug |
| JP6923466B2 (ja) | 2018-02-09 | 2021-08-18 | トヨタ自動車株式会社 | 車両用駆動装置 |
| DE102019102078B3 (de) * | 2019-01-28 | 2020-06-04 | Gkn Automotive Limited | Getriebeanordnung |
| DE102019201586A1 (de) | 2019-02-07 | 2020-08-13 | Volkswagen Aktiengesellschaft | Ölbehälter zur Kühlung und/oder Schmierung von Lagern eines Antriebsstranges eines Fahrzeuges, insbesondere eines Kraftfahrzeuges |
| JP6702468B1 (ja) | 2019-02-26 | 2020-06-03 | スズキ株式会社 | 車両用駆動装置 |
| JP7259533B2 (ja) | 2019-05-14 | 2023-04-18 | スズキ株式会社 | 車両用駆動装置 |
-
2021
- 2021-12-07 DE DE102021132153.0A patent/DE102021132153B3/de active Active
-
2022
- 2022-11-07 CN CN202280080363.3A patent/CN118355215A/zh active Pending
- 2022-11-07 WO PCT/DE2022/100817 patent/WO2023104230A1/de not_active Ceased
- 2022-11-07 US US18/717,707 patent/US20250043860A1/en active Pending
- 2022-11-07 KR KR1020247010893A patent/KR20240051262A/ko active Pending
- 2022-11-07 EP EP22803164.7A patent/EP4445047A1/de not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| KR20240051262A (ko) | 2024-04-19 |
| WO2023104230A1 (de) | 2023-06-15 |
| CN118355215A (zh) | 2024-07-16 |
| US20250043860A1 (en) | 2025-02-06 |
| DE102021132153B3 (de) | 2023-03-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| STAA | Information on the status of an ep patent application or granted ep patent |
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