EP3969348A2 - Wheel-mounted brake disk for rail vehicles - Google Patents
Wheel-mounted brake disk for rail vehiclesInfo
- Publication number
- EP3969348A2 EP3969348A2 EP20726342.7A EP20726342A EP3969348A2 EP 3969348 A2 EP3969348 A2 EP 3969348A2 EP 20726342 A EP20726342 A EP 20726342A EP 3969348 A2 EP3969348 A2 EP 3969348A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- friction
- bearing surfaces
- web
- length
- dome
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
- B61H5/00—Applications or arrangements of brakes with substantially radial braking surfaces pressed together in axial direction, e.g. disc brakes
-
- 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
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D65/12—Discs; Drums for disc brakes
- F16D65/123—Discs; Drums for disc brakes comprising an annular disc secured to a hub member; Discs characterised by means for mounting
- F16D65/124—Discs; Drums for disc brakes comprising an annular disc secured to a hub member; Discs characterised by means for mounting adapted for mounting on the wheel of a railway vehicle
-
- 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
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D2065/13—Parts or details of discs or drums
- F16D2065/1304—Structure
- F16D2065/1328—Structure internal cavities, e.g. cooling channels
-
- 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
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D2065/13—Parts or details of discs or drums
- F16D2065/134—Connection
- F16D2065/138—Connection to wheel
Definitions
- the invention relates to a wheel brake disc for rail vehicles according to the preamble of claim 1.
- Such a wheel brake disc of rail vehicles is usually attached to a wheel body of a rail wheel.
- Figure 1 shows in a schematic partial section of a schematic radial sectional view of a wheel body 1 with a wheel axle 1 a and with a wheel brake disc 2 according to the prior art.
- the wheel brake disk 2 has two friction disks 2a, 2b with a respective friction surface 15.
- the two friction disks 2a, 2b are braced together by means of through bolts 3 against a wheel disk or against a web 10 of the wheel body 1.
- fastening domes 9 are regularly distributed over a diameter and each have a respective contact surface 9a on a respective (inner) flange 9b in a certain length parallel to the direction of the wheel axis 1 a. These contact surfaces 9a are in contact with a respective contact surface 11 of the web 10.
- a rotation of the friction disks 2a, 2b on the wheel disk or on the web 10 is usually prevented by radially arranged sliding blocks (not shown). These also take all forces on the wheel disc in the tangential direction, e.g. the frictional force between the brake lining (not shown, but easy to imagine) and friction disc 2a, 2b and transferred to the wheel body 1 of the associated wheel.
- each friction disk 2a, 2b causes, if the friction disk 2a, 2b is not held securely, for example, the Friction disc 2a, 2b (see Figure 1, friction disc 2b) and a curvature of a friction surface 16 of a respective friction disc 2a, 2b (see Figure 1, friction disc 2a) in the radial direction when heated by braking. Both effects lead to a deformation of the respective friction surface 2a, 2b, which leads to uneven wear of the brake lining, with the contact surface contacts between friction disks 2a, 2b and web 10 being changed or reduced at the same time. This is shown schematically in FIG.
- the thermally induced deformation leads to high dynamic stress on the screws in tension and bending. Since the screws are usually designed to be time-resistant, the number of load cycles that can be tolerated is limited accordingly.
- FIG. 2 shows Figure 2 a schematic partial section of a schematic radial sectional view of a wheel body 1 with a wheel brake disc 2 according to the prior art.
- FIG. 3 shows a schematic top view of a section of a rear side R of a friction disk 2a, 2b of the wheel brake disk according to FIG. 2 from the prior art.
- the friction disks 2a, 2b of the wheel brake disk 2 are arranged coaxially to the Radkör by 1 and its wheel axle 1 a.
- the through bolts 3 each have a screw head 4 with a sleeve 4a arranged underneath, extend through fürgangsboh ments 12 of the respective flanges 9b of the domes 9 of both friction disks 2a, 2b and the web 10 in a direction parallel to the wheel axis 1 a and are each clamped with a nut 5.
- the screw heads 4 with the sleeves 4 a and the nuts 5 are each arranged in an undercut 8 of a countersink 6 of a respective dome 9.
- the countersink 6 has on the input side a zy-cylindrical area 7, which merges into the undercut 8, a GE rounded transition 13 of the undercut 8 is formed on the flange 9b.
- the sleeve 4a rests on the inside of the flange 9b of the left friction disk 2a shown in FIG. 2, the nut 5 resting on the inside of the flange 9b of the right friction disk 2a shown in FIG.
- the bearing surfaces 9a of the flanges 9 of the friction disks 2a, 2b are each in contact with the bearing surface 11 of the web 10. Due to the special shape of the countersinks in the friction disks 2a, 2b and a comparatively small flange thickness of the respective flange 9b under the screw head or nut support, a comparatively elastic flange 9b is achieved which experiences a correspondingly low thermal expansion during braking. As a result, the load on the through bolts 12 is reduced by the change in thickness of a heating flange 9b.
- the screw force of the through bolts 12 is selected to be just large enough that a radial expansion of the friction disks 2a, 2b can take place when heated against the frictional force in the respective flange surface of the flanges 9b.
- the contact surfaces 9a of the flanges 9b of the friction disks 2a, 2b on the web 10 of the wheel body 1 extend radially and in the circumferential direction over the respective entire friction disk 2a, 2b.
- the friction disks 2a, 2b have cooling fins 14, 14 '; 16, 16 '; 17, 17 ', which also extend essentially radially on the rear side R of the friction disks 2a, 2b and have respective bearing surfaces 14a, 14'a; 16a, 16’a; 17a, 17’a that are in contact with the support surfaces 1 1 of the web 10.
- the cooling fins 14, 14 '; 16, 16 '; 17, 17 ’ stand with their respective contact surfaces 14a, 14’a; 16a, 16’a; 17a, 17’a in a certain first length parallel to the direction of the wheel axis 1 a.
- This first length corresponds to the length of the dome 9. So with all bearing surfaces 9a; 14a, 14’a; 16a, 16’a; 17a, 17’a on one level.
- the cooling fins 14, 16, 17 with their bearing surfaces 14a, 16a, 17a are on an inner diameter 21 and the cooling fins 14 ', 16', 17 'with their bearing surfaces 14'a, 16'a, 17'a are on an outer diameter 23 arranged.
- the domes 9 are arranged with their bearing surfaces 9b, a dome 9 each being located in the radial direction between two cooling fins 14, 14 '.
- FIG. 3 shows the distribution of the abovementioned contact surfaces 9b; 14a, 14'a; 16a, 16'a; 17a, 17'a for better clarification in cross-hatching on the rear side R of a friction disk 2a, 2b.
- the diameters 21, 22, 23 indicate approximately a mean diameter of a respective imaginary third in the radial direction of the friction disk 2a. Due to the comparatively large extent of the bearing surfaces 9b; 14a,
- the friction disks 2a, 2b are in the middle third, i.e. in the area of the mean diameter 23 - if there is a sprue for a sliding block with a radial groove 18 - but above all in the vicinity of the inner and outer diameter 22, 21 on the web 10 of the wheel body 1.
- the contact surface of the friction disks 2a, 2b on the web 10 of the wheel body 1 is only realized in areas below the screw head or nut support, i.e. in the area of the mean diameter 22.
- the areas of the inner and outer diameter 22, 21 can be freely deformed.
- a split of the friction discs 2a, 2b is supported by the through bolts 12 only over the comparatively short extension of the bearing surface 9b in the radial direction. This leads to the fact that the split of the respective friction disk 2a, 2b can develop almost unhindered and the through bolts 12 are loaded with a higher bending moment.
- the contact or support surface of the friction disk of the wheel brake disk is designed so that in sectors of the circle in which the screw connections are located, the friction disks are only in an area directly below the screw head or nut support on the web of the wheel center .
- the radially inner and outer areas are at a distance from the web of the wheel body in such a way that there is no contact or support between the friction disk and the web of the wheel body.
- a wheel brake disc comprises at least two friction discs which are arranged on both sides of a web of a wheel body of a rail wheel and are fastened by means of through screws, the min least two friction discs having cooling ribs and domes, the through bolts extending through the domes of both friction discs and the web, wherein bearing surfaces of the domes and bearing surfaces of the cooling ribs protrude from a respective rear side of the at least two friction disks in a first length and are in contact with bearing surfaces of the web of the wheel body.
- End faces of the cooling ribs which are each arranged with a dome in screwing sectors of the at least two friction disks, protrude from a respective rear side of the at least two friction disks in a second length, the dimension of which is less than the dimension of the first length in which the bearing surfaces of the domes and support surfaces of the cooling ribs protrude, and wherein the end faces of the cooling fins stood in an Ab are arranged on the web.
- a wheel brake disc according to the invention has at least two friction discs, which are arranged on both sides of a web of a wheel body of a rail wheel and are fastened by means of through screws, the min least two friction discs having cooling ribs and domes, the through-bolts passing through the domes of both friction discs and the web stretch, with bearing surfaces of the domes and bearing surfaces of the cooling ribs protruding from a respective rear side of the at least two friction disks in a first length and being in contact with bearing surfaces of the web of the wheel body.
- the bearing surfaces of the cooling fins protrude from the respective rear side of the at least two friction disks in the first length and are in contact with the bearing surfaces of the web of the wheel body in sectors of a circle, and the end surfaces of the cooling fins, which are each connected to a dome.
- Screw sectors of the at least two friction disks are arranged, stand hen from a respective rear side of the at least two friction disks protruding in a second length, the dimension of which is less than the dimension of the first length in which the bearing surfaces of the domes and bearing surfaces of the cooling fins ago, and wherein the end faces of the cooling ribs in the screwing sectors are arranged at a distance from the web.
- the friction disks are only in one area directly below the screw head or nut support on the web of the wheel body, the radially inner and outer areas being at a distance from the web of the wheel body in such a way that a contact or support between Friction disc and web of the wheel center does not occur. And in the sectors of the circle between the screwing sectors, the friction disks are in a central area, but above all in the vicinity of an inner and an outer diameter on the web.
- the bearing surfaces of the cooling ribs are arranged in the Kreissekto ren outside the screwing sectors both in an inner third with an inner diameter of the friction disk and in an outer third with an outer diameter of the friction disk and are in contact with the web. This is advantageous because the cooling fins thus have a cooling function and a support function.
- the bearing surfaces of the cooling fins (17, 17 ') in the further circular sectors outside the screwing sectors in an inner third with an inner diameter of the friction disk, the bearing surfaces of the cooling fins in a middle third with an average diameter of the friction disk and the Support surfaces of the cooling fins are arranged in an outer Drit tel with an outer diameter of the friction disk and are in contact with the web.
- a radial groove for sliding blocks is formed in each of the further circular sectors (20b) in the middle third with the mean diameter of the friction disk between the bearing surfaces.
- the bearing surfaces in the inner third have a T-shaped cross section with an inner diameter of the friction disk
- the bearing surfaces in the middle third with the middle Diameter of the friction disc have essentially semicircular cross-sections
- the bearing surfaces in the outer third with the outer diameter of the friction disc have a rectangular cross-section with a rounded side.
- the ratio of the length of the cylindrical area in the direction of the central axis of the dome to the length of the undercut in the direction of the dome has a value in the range from 1.2 to 1.3.
- Another alternative embodiment provides that the length of the cylindrical area in the direction of the central axis of the dome corresponds to the length of the undercut in the direction of the dome.
- Yet another embodiment consists in that a ratio of an inner diameter of the undercut to an inner diameter of the cylindri's area has the value in the range from 1.1 to 1.4. In this way, a further advantageous increase in stability can be achieved.
- the ratio of an outer diameter of the dome to the inner diameter of the undercut can have a value in the range from 1.3 to 1.5. This is advantageous because the strength of the dome can be increased.
- Figure 1-2 schematic partial sections of a schematic radial sectional view of a wheel body with a wheel brake disc according to the prior art
- Figure 3 is a schematic plan view of a portion of a rear side of a friction disc of the wheel brake disc according to Figure 2 according to the prior art;
- Figure 4 is a schematic plan view of a rear side of a friction disc of a wheel brake disc according to the invention.
- FIG. 5 shows a schematic partial section of a schematic radial sectional view of a wheel body with a wheel brake disc according to the invention in a sectional plane V from FIG. 4;
- FIG. 6 shows a schematic partial section of a schematic radial section view of a wheel body with a wheel brake disc according to the invention in a section plane VI from FIG.
- FIG. 4 shows a schematic top view of a rear side R of a friction disk 2a, 2b of a wheel brake disk 2 according to the invention.
- FIG. 5 a schematic partial section of a schematic radial sectional view of a wheel body 1 with a wheel brake disk 2 according to the invention is shown in a sectional plane V from FIG.
- FIG. 6 shows a schematic partial detail of a schematic radial sectional view of a wheel body 1 with a wheel brake disc 2 according to the invention in a sectional plane VI from FIG. 4.
- the friction disk 2a, 2b in Figure 4 is divided into three thirds in the radial direction for a better overview.
- the inner third is indicated by the inner diameter 21. This is followed by the middle third with the middle diameter 22 and the outer third with the outer diameter 23.
- Circular sectors 20, 20a, 20b are distributed angeord net over the friction disk 2a, 2b, of which only three are referred to here as examples.
- the circular sectors 20 are therefore referred to below as screwing sectors 20.
- the circular sectors 20a have cooling fins 16, 16 '.
- the friction disks 2a, 2b lie in the middle area - if a sprue for a sliding block is available - but above all in the vicinity of the inner and outer diameter 21, 23 of the web 10 .
- the friction disc 2a, 2b according to the invention according to Figure 4-6 in the screwing sectors 20 each have only one support surface 9a of a flange 9b of a respective cathedral 9.
- This bearing surface 9a of the flange 9b protrudes from the rear side R of the friction disk 2a, 2b in a first length parallel to the wheel axis 1 a.
- the cooling rib 14, 14 'arranged radially above and below the dome 9 protrudes from the rear side R of the friction disk 2a, 2b in a second length parallel to the wheel axis 1 a and parallel to the dome 9, this second length being less than the first length of the dome 9.
- free end faces 14b, 14'b of the cooling rib 14, 14 ' are arranged at a distance from a free surface 11 a of the web 10, whereby a contact of the cooling rib 14, 14', ie the free end face 14b, 14'b with the web 10 of the wheel body 1 is neither present in the outer third with the outer diameter 23 nor in the inner third with the inner diameter 21.
- the wheel brake disc 2 according to the invention with the two friction discs 2a, 2b with a wheel body 1 of a rail wheel in a radial section is shown by a screw connection.
- the friction discs 2a, 2b are only under the screw support surface, ie the respective inside of the flanges 4b (seen in the radial direction in the middle third of the friction disc) over the respective support surface 9a the outside of the flange 9b on the bearing surface 1 1 of the web 10 of the wheel body 1.
- the cooling ribs 14, 14 'in the screwing sectors 20 have no contact surface with the web 10, neither in the outer nor in the inner third of the friction disk 2a, 2b.
- support surfaces 16a, 16'a of the cooling fins 16, 16 ' are provided both in the outer and in the inner third of the friction disk 2a, 2b.
- the radial groove 18 for the sliding blocks is formed between the bearing surfaces 17b.
- the bearing surfaces 14a, 16a, 17a of the cooling fins 14, 16, 17 are larger.
- the domes 9 of the friction disks 2a, 2b according to the invention are designed differently from the domes 9 of the friction disks 2a, 2b from the prior art (FIG. 2).
- a ratio of the inside diameter of the flint cutting 8 to the inside diameter of the cylindrical region 7 is approximately 1.3 in the example shown, whereas it is approximately 1.5 in the prior art. In this case, the inside diameter of the undercut 8 is reduced.
- a ratio of the outer diameter of the dome 9 to the inner diameter of the undercut 8 is approximately 1.44 and is thus greater than the ratio of these diameters in the prior art of approximately 1.14.
- a length of the cylindrical region 7 in the direction of the central axis of the dome 9 is increased in relation to the prior art.
- a ratio of the length of the cylindrical area 7 to the length of the undercut 8 can, for example, be in a range from 0.75 to 1.5. In the example shown, this ratio is, for example, approximately 1.25 and is thus greater than in the prior art, in which this ratio is approximately 0.3.
- Figure 6 shows a schematic partial section of a schematic radial sectional view of a wheel body 1 with a wheel brake disk 2 according to the invention with the friction disks 2a, 2b in a sectional plane VI from Figure 4 through a cooling rib outside the screwing sectors 20, such as in the circular sectors 20a and in the Circular sectors 20b (but without a middle bearing surface 17b).
- the bearing surfaces 14a are arranged in the inner third of the friction disks 2a, 2b and the bearing surfaces 14’a in the outer third of the friction disks 2a, 2b (see also FIG. 4).
- 16a, 16’a; 17a, 17’a, 17b support surface 18 radial groove
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102019112693 | 2019-05-15 | ||
PCT/EP2020/063216 WO2020229483A2 (en) | 2019-05-15 | 2020-05-12 | Wheel-mounted brake disk for rail vehicles |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3969348A2 true EP3969348A2 (en) | 2022-03-23 |
Family
ID=70740597
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20726342.7A Pending EP3969348A2 (en) | 2019-05-15 | 2020-05-12 | Wheel-mounted brake disk for rail vehicles |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3969348A2 (en) |
DE (1) | DE102020112874A1 (en) |
WO (1) | WO2020229483A2 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022210831A1 (en) * | 2021-04-01 | 2022-10-06 | 日本製鉄株式会社 | Brake disc |
CN114776738A (en) * | 2022-05-10 | 2022-07-22 | 中国铁道科学研究院集团有限公司 | Wheel-mounted brake disc |
DE102022122482A1 (en) | 2022-09-06 | 2024-03-07 | Knorr-Bremse Systeme für Schienenfahrzeuge GmbH | Friction ring for a wheel brake disc of a rail vehicle |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011102518A1 (en) * | 2011-05-26 | 2012-11-29 | Knorr-Bremse Systeme für Schienenfahrzeuge GmbH | Wheel brake |
DE102012015378A1 (en) * | 2012-08-03 | 2014-02-06 | Knorr-Bremse Systeme für Schienenfahrzeuge GmbH | wheel brake |
JP5924413B2 (en) * | 2012-09-07 | 2016-05-25 | 新日鐵住金株式会社 | Brake disc for railway vehicles |
AT514902A1 (en) * | 2013-09-24 | 2015-04-15 | Siemens Ag Oesterreich | Rail wheel with wheel brake disc |
-
2020
- 2020-05-12 WO PCT/EP2020/063216 patent/WO2020229483A2/en unknown
- 2020-05-12 DE DE102020112874.6A patent/DE102020112874A1/en active Pending
- 2020-05-12 EP EP20726342.7A patent/EP3969348A2/en active Pending
Also Published As
Publication number | Publication date |
---|---|
DE102020112874A1 (en) | 2020-11-19 |
WO2020229483A4 (en) | 2021-03-04 |
WO2020229483A3 (en) | 2021-01-07 |
WO2020229483A2 (en) | 2020-11-19 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2020229483A2 (en) | Wheel-mounted brake disk for rail vehicles | |
EP1682791B2 (en) | Brake disk, especially for a rail vehicle | |
EP2501956B1 (en) | Damper valve | |
DE102012002734A1 (en) | Belaghaltesystem a disc brake of a motor vehicle | |
DE2720664C2 (en) | Friction disc for a vehicle friction clutch | |
EP2553290A1 (en) | Brake disc | |
DE19617154C2 (en) | Brake disc assembly with a hub and a friction ring attached to it | |
EP2715180B1 (en) | Wheel-mounted brake disks | |
EP0564942A1 (en) | Brake disc for disc brake, especially for railway vehicles | |
DE102012024298A1 (en) | Brake disk for disk brake of vehicle, has knobs formed such that knobs extend approximately over width between two friction rings, so that small clearance is present between tip of each knob and inner side of opposite friction rings | |
DE4003732A1 (en) | Brake disc for tracked vehicle disc brake - has friction disc held by support and joined by bridge connections | |
WO1995013488A1 (en) | Brake disc for a disc-brake system | |
DE69102340T2 (en) | Wheels with built-in brake discs. | |
DE3446437A1 (en) | Wheel assembly with disc brake for vehicles | |
EP0935536A1 (en) | Wheel construction, in particular for automobiles | |
DE10212670B4 (en) | disc brake | |
EP2229543B1 (en) | Wheel brake disc for a wheel of a vehicle | |
DE4131519A1 (en) | WEIGHT-REDUCED BRAKE ROTOR | |
DE2828109C2 (en) | Brake disc for disc brake devices in rail vehicles | |
DE102016103396A1 (en) | Brake pad of a disc brake and brake pad set | |
EP2872789B1 (en) | Disk brake for a commercial vehicle | |
EP1396652B1 (en) | Disc brake | |
DE69005573T2 (en) | Wheels with brake discs. | |
EP0684403A1 (en) | Disc brake | |
DE4106442C2 (en) | Vibration damping device with load-dependent damping behavior |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20211215 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
DAV | Request for validation of the european patent (deleted) | ||
DAX | Request for extension of the european patent (deleted) | ||
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
|
17Q | First examination report despatched |
Effective date: 20230629 |