EP3833889A1 - Hydraulische spannvorrichtung mit zwei kolben - Google Patents
Hydraulische spannvorrichtung mit zwei kolbenInfo
- Publication number
- EP3833889A1 EP3833889A1 EP19752096.8A EP19752096A EP3833889A1 EP 3833889 A1 EP3833889 A1 EP 3833889A1 EP 19752096 A EP19752096 A EP 19752096A EP 3833889 A1 EP3833889 A1 EP 3833889A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- spring element
- axially
- recess
- locking ring
- 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- Withdrawn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
- 239000012530 fluid Substances 0.000 claims abstract description 30
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 239000011343 solid material Substances 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
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
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes or chains
-
- 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
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes or chains
- F16H7/0829—Means for varying tension of belts, ropes or chains with vibration damping means
- F16H7/0834—Means for varying tension of belts, ropes or chains with vibration damping means of the viscous friction type, e.g. viscous fluid
-
- 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
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes or chains
- F16H2007/0802—Actuators for final output members
- F16H2007/0806—Compression coil springs
-
- 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
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes or chains
- F16H2007/0802—Actuators for final output members
- F16H2007/0808—Extension coil springs
-
- 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
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes or chains
- F16H2007/0802—Actuators for final output members
- F16H2007/0812—Fluid pressure
-
- 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
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes or chains
- F16H7/0848—Means for varying tension of belts, ropes or chains with means for impeding reverse motion
- F16H2007/0859—Check valves
Definitions
- the invention relates to a hydraulic tensioning device with two pistons, each piston being loaded by a respective spring element in order to reduce peak operating loads in a traction drive system.
- Tensioning devices are used to tension the traction means, for example a chain of an internal combustion engine.
- a certain degree of tension is provided on the traction mechanism in order to avoid noise and slipping.
- the degree of tension on the traction device can change significantly due to temperature fluctuations during operation and the associated linear thermal expansion of various components of the internal combustion engine.
- wear of the traction device can lead to a reduction in tension.
- a typical hydraulic tensioner consists of a housing with a bore, a fluid chamber formed by the bore, and a hollow piston that is biased in one direction out of the bore by a spring.
- a check valve is provided in the hydraulic tensioning device in order to allow a fluid flow from a pressure medium source into the fluid chamber, while at the same time preventing a backflow in the opposite direction.
- the force exerted by the chain on the piston in the inward direction is balanced by the resistance force of the fluid and the force of the spring in the outward direction.
- the check valve closes to restrict fluid flow out of the fluid chamber. Only a small gap between the piston and the housing wall allows the fluid to escape, which enables the piston to retract.
- the tensioning device achieves a so-called no-return function.
- the no-return function can make it difficult to compensate for tension peaks in the chain.
- the small gap between the piston and the housing wall is generally not sufficient to rapidly displace the hydraulic fluid in the fluid chamber and to avoid a sudden overloading of the chain.
- the damping function is thus in a voltage relationship to the relief function during peak loads.
- a hydraulic tensioner with a housing having a bore and a primary piston slidably supported in the bore, the primary piston having an opening at the lower end which defines a fluid chamber with the bore. Furthermore, the hydraulic tensioning device has a first spring member, which is arranged inside the bore, the first spring member biasing the primary piston in an upward direction projecting out of the bore.
- a check valve is provided between the fluid chamber and a pressure medium source in order to allow a flow from the pressure medium source into the chamber and to block a flow in the reverse direction.
- a channel is formed in the housing for connecting the fluid chamber to the pressure medium source.
- a secondary piston is axially movably guided with respect to the upper end of the primary piston, with a limiting member limiting the axial movement of the secondary piston in an upward direction.
- a secondary spring member is disposed between the primary piston and the secondary piston, with the secondary spring member biasing the secondary piston away from the primary piston.
- the object of the present invention is to further develop a hydraulic tensioning device with two pistons.
- the object is achieved by the subject matter of patent claim 1. Preferred embodiments can be found in the dependent claims.
- a hydraulic tensioning device comprises a housing with a bore and a first piston which is axially movable in the bore, the first piston having a first recess, the first recess forming a fluid chamber together with the bore, a first spring element in the fluid chamber is arranged axially between the first piston and the housing, a second piston being arranged axially movably in a second recess on the first piston, wherein a second spring element is arranged axially between the first piston and the second piston, with a securing ring also being spatially arranged is arranged between the first and the second piston, the Si Circlip at least indirectly pretensions the second spring element on the second piston and thus forms a preassembled tension spring unit.
- the first spring element can have a higher spring stiffness than the second spring element.
- the locking ring serves to pre-assemble the tension spring unit, which comprises at least the second spring element and the second piston. Because the second spring element is fixed to the second piston by the locking ring and thus made transportable.
- a spring element is to be understood as a mechanical spring, for example a disc spring or a compression spring. Likewise, several springs can be combined to form a spring element.
- the second spring element can comprise at least one plate spring or a compression spring or be designed as a plate spring package.
- the securing ring is preferably arranged in a circumferential groove on a lateral surface of the second piston.
- the circumferential groove is at least partially designed to correspond to the retaining ring, the retaining ring at least partially penetrating radially into the groove.
- the retaining ring advantageously protrudes at least half from the groove.
- An annular disk for axially receiving the second spring element is preferably arranged axially on the retaining ring.
- the second spring element therefore comes to rest axially on the locking ring.
- the second spring element is also arranged axially on a shoulder of the second piston.
- the second spring element therefore also comes to rest axially on the shoulder of the second piston.
- the second spring element is supported axially on the locking ring and on the shoulder of the second piston.
- the ring disk preferably has a circumferential chamfer, the securing ring axially coming into contact with the chamfer.
- the chamfer is used for improved plant ge of the washer on the circlip, especially for centering and positioning the washer on the circlip.
- the washer is fixed in the second recess of the first piston.
- the ring disk is rotated after assembly in the second recess of the first piston and axially connected to the first piston.
- the invention includes the technical teaching that the second spring element is arranged radially between an inner surface on the first piston and an outer surface on the second piston.
- the second spring element is arranged in an annular shaft spatially between the first and second pistons.
- the first piston is arranged radially between the second spring element and the second piston.
- the second piston is located radially on the outside and is attached to the first piston.
- a groove for a retaining ring can be provided on the inner lateral surface.
- the locking ring can be held by the groove and engage in a transport locking recess on the first piston.
- the groove can also be located on the outer lateral surface of the first piston and the transport securing recess can also be located on the inner lateral surface of the second piston.
- the transport securing recess forms a stop which prevents the device from falling apart during transport.
- the second piston is designed in the shape of a stopper from solid material.
- the second piston has a first and a second cylindrical section, the first cylindrical section having a smaller diameter than the second cylindrical section.
- the invention includes the technical teaching that a channel for operative connection to a pressure medium source is formed on the housing, a check valve being arranged spatially between the channel and the fluid chamber.
- the check valve is provided to allow a flow from the channel into the fluid chamber and to block a flow from the fluid chamber into the channel. Further measures improving the invention are described in more detail below together with the description of preferred exemplary embodiments of the invention using the figures. It shows
- FIG. 1 shows a schematic sectional illustration to illustrate the structure of a hydraulic tensioning device according to the invention in accordance with a first exemplary embodiment
- FIG. 2 shows a further schematic sectional illustration of a hydraulic tensioning device according to the invention, which is only partially shown, according to a second exemplary embodiment
- FIG. 3 shows a further schematic sectional illustration of a hydraulic tensioning device according to the invention, which is only partially shown, according to a third exemplary embodiment.
- Figure 4 shows a further schematic sectional view of a hydraulic
- Figure 5 shows a further schematic sectional view of a hydraulic
- a hydraulic tensioning device 1 comprises a housing 2 with a bore 3 and a first piston 4a which is axially movable in the bore 3.
- the first piston 4a has a first recess 5a, the first recess 5a forming a fluid chamber 6 together with the bore 3.
- a first spring element 7a is arranged in the fluid chamber 6 axially between the first piston 4a and the housing 2, the first spring element 7a being provided for axially prestressing the first piston 4a.
- the hydraulic tensioning device 1 also has a second piston 4b, which is arranged in an axially movable manner in a second recess 5b on the first piston 4b in order to remove tension peaks from a traction means (not shown here) of a traction mechanism drive system.
- Axially between the first piston 4a and the second piston 4b is a two- Tes spring element 7b arranged, which is intended to bias the second piston 4b.
- a locking ring 8 is spatially arranged between the first and the second piston 4a, 4b.
- the second piston 4b is plug-shaped from solid material.
- the locking ring 6 is arranged in a circumferential groove 9 on a lateral surface of the first piston 4a and also projects into a circumferential and partially axially extending recess 15 on the second piston 4b.
- the second spring element 7b is supported axially on an end face of the first piston 4a and on a shoulder 12 of the second piston 4b.
- the second spring element 7b is designed as a compression spring.
- a channel 13 is formed on the housing 2 for operative connection with a pressure medium source (not shown here), a nonreturn valve 14 being arranged spatially between the channel 13 and the fluid chamber 6.
- the check valve 14 is provided to allow a flow from the channel 13 into the fluid chamber 6 and to block a flow from the fluid chamber 6 into the channel 13.
- FIGS. 2 and 3 dispense with the illustration of the housing 2 and the elements arranged spatially between the housing 2 and the first piston 4a. These elements - which are no longer shown here - are identical in construction and functionally identical to the elements according to FIG. 1.
- a first piston 4a of the hydraulic tensioning device 1 has a first and second recess 5a, 5b, the two recesses 5a, 5b being formed on opposite free ends of the first piston 4a.
- a second piston 4b is axially movably arranged in the second recess 5b on the first piston 4b in order to remove voltage peaks from a traction means (not shown here) of a traction drive system.
- a second spring element 7b is arranged axially between the first piston 4a and the second piston 4b.
- the second piston 4b is plug-shaped from solid material.
- the second piston 4b protrudes by a few millimeters, for example approximately 1 mm to 1.3 mm the second recess 5b of the first piston 4a axially out.
- the double piston arrangement is therefore of particularly compact design.
- a locking ring 8 is arranged spatially between the first and the second piston 4a, 4b, the locking ring 8 prestressing the second spring element 7b on the second piston 4b indirectly via an annular disk 10 and thereby forming a preassembled tension spring unit.
- the annular disk 10 is provided for the axial reception of the second spring element 7b and comes into contact with the locking ring 8.
- the annular disk 10 is also provided to limit an axial exit of the second piston 4b from the first piston 4a.
- the locking ring 6 is arranged in a circumferential groove 9 on a lateral surface of the second piston 4b.
- the ring disk 10 has a circumferential chamfer 11, the locking ring 8 coming into contact with the chamfer 11.
- the annular disk 10 is fixed in the second recess 5b of the first piston 4a and is thus held in position in the first piston 4a.
- the second spring element 7b is supported axially on the annular disk 10 and on a shoulder 12 of the second piston 4b. Furthermore, the second spring element 7b is arranged radially between an inner surface on the first piston 4a and an outer surface on the second piston 4b.
- the locking ring 8 forms, together with the washer 10, the second spring element 7b and the second piston 4b, the preassembled and pretensioned tension spring unit, which is advantageously transportable and can also be retrofitted in the first piston 4a.
- the second spring element 7b is designed as a plate spring package and comprises a plurality of plate springs which come into axial contact with one another.
- a first piston 4a of the hydraulic tensioning device 1 has first and second recesses 5a, 5b, the two recesses 5a, 5b being formed on opposite free ends of the first piston 4a.
- a second piston 4b is axially movably arranged in the second recess 5b on the first piston 4b in order to eliminate voltage peaks from a traction means (not shown here) of a traction drive system.
- a second spring element 7b is arranged axially between the first piston 4a and the second piston 4b. The second spring element 7b is supported axially in the second recess 5b of the first piston 4a and indirectly via an annular disc 10 on a shoulder 12 of the second piston 4b. In the present case, the second spring element 7b is designed as a compression spring.
- the second piston 4b is plug-shaped and has a vent hole 16.
- a locking ring 8 is arranged spatially between the first and the second piston 4a, 4b, the ring disk 10, which is fixedly received on the second piston 4b, coming to bear against the locking ring 8 in the present case.
- the annular disk 10 is provided for the axial reception of the second spring element 7b and for the axial limitation of an outlet of the second piston 4b from the first piston 4a.
- the locking ring 6 is arranged in a circumferential groove 9 on a lateral surface of the first piston 4a. To center the ring disk 10 on the locking ring 8, the ring disk 10 has a circumferential chamfer 11, the locking ring 8 coming into contact with the chamfer 11.
- a fourth exemplary embodiment has essentially the same structure as the embodiment of FIG. 3.
- a locking ring 8 is arranged spatially between the first and the second piston 4a, 4b, the transport securing recess 17 arranged on the second piston 4b in the present case provides an area on which the locking ring 8 comes to rest.
- the transport securing recess 17 is thus provided for axially delimiting an outlet of the second piston 4b from the first piston 4a.
- the locking ring 6 is arranged in a circumferential groove 9 on a lateral surface of the second piston 4b.
- a fifth embodiment has a housing 2 with a bore 3 and a first piston 4a which is axially movable in the bore 3.
- the first piston 4a has a first recess 5a, the first recess 5a forming a fluid chamber 6 together with the bore 3.
- a first spring element 7a is arranged axially in the fluid chamber 6 between the first piston 4a and the housing 2.
- a second piston 4b is axially movable in a second recess 5b on the first piston 4b. Venting is made possible by a vent hole 16.
- a second spring element 7b is arranged axially between the first piston 4a and the second piston 4b.
- a locking ring 8 is arranged spatially between the first and the second piston 4a, 4b, the locking ring 8 at least indirectly biasing the second spring element 7b on the second piston 4b and forming a preassembled tension spring unit.
- the locking ring 6 is arranged in a circumferential groove 9 on a lateral surface of the second piston 4b.
- the first piston 4a is arranged radially between the second spring element 7b and the second piston 4b.
- the second piston 4b is therefore located radially on the outside and is pushed onto the first piston 4a.
- a groove 9 for a retaining ring 8 can be provided on the inner jacket surface.
- the securing ring 8 can engage in a transport securing recess 17 on the first piston 4, held by the groove.
- the transport securing recess 17 forms a stop on the axially inner side, which prevents the device from falling apart during transport.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018119067.0A DE102018119067A1 (de) | 2018-08-06 | 2018-08-06 | Hydraulische Spannvorrichtung mit zwei Kolben |
| DE102019120127.6A DE102019120127A1 (de) | 2019-07-25 | 2019-07-25 | Hydraulische Spannvorrichtung mit zwei Kolben |
| PCT/DE2019/100695 WO2020030221A1 (de) | 2018-08-06 | 2019-07-30 | Hydraulische spannvorrichtung mit zwei kolben |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3833889A1 true EP3833889A1 (de) | 2021-06-16 |
Family
ID=67551484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19752096.8A Withdrawn EP3833889A1 (de) | 2018-08-06 | 2019-07-30 | Hydraulische spannvorrichtung mit zwei kolben |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3833889A1 (de) |
| CN (1) | CN112567154A (de) |
| DE (1) | DE112019003937A5 (de) |
| WO (1) | WO2020030221A1 (de) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013043373A1 (en) * | 2011-09-22 | 2013-03-28 | Borgwarner Inc. | Chain drive tensioner spring force control mechanism |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5370584A (en) * | 1993-01-15 | 1994-12-06 | Borg-Warner Automotive, Inc. | Piston design for removing air from a hydraulic tensioner |
| US5993342A (en) | 1997-03-26 | 1999-11-30 | Borg-Warner Automotive, Inc. | Hydraulic tensioner with force limiting tensioner spring |
| US6716124B2 (en) * | 2000-11-29 | 2004-04-06 | Borgwarner Inc. | Hydraulic tensioner with improved pressure relief valve reactive to peak operating loads |
| JP4113817B2 (ja) * | 2003-09-03 | 2008-07-09 | ボルグワーナー・モールステック・ジャパン株式会社 | 液圧テンショナ |
| DE102008016654B4 (de) * | 2008-04-01 | 2019-02-21 | Elringklinger Ag | Autark-Kettenspanner mit Doppeldichtring |
| JP5275201B2 (ja) * | 2009-10-09 | 2013-08-28 | 株式会社東芝 | 開閉装置用操作機構の緩衝装置およびその注油方法 |
| WO2014099291A1 (en) * | 2012-12-18 | 2014-06-26 | Borgwarner Inc. | Tensioner with spring force control in a second bore |
| WO2015006195A1 (en) * | 2013-07-10 | 2015-01-15 | Borgwarner Inc. | Expanding piston hydraulic chain tensioner |
| CN105782376B (zh) * | 2016-05-27 | 2018-08-14 | 钟晓悦 | 传动带辅助挤压锥盘带式变速装置 |
-
2019
- 2019-07-30 EP EP19752096.8A patent/EP3833889A1/de not_active Withdrawn
- 2019-07-30 WO PCT/DE2019/100695 patent/WO2020030221A1/de not_active Ceased
- 2019-07-30 DE DE112019003937.7T patent/DE112019003937A5/de not_active Withdrawn
- 2019-07-30 CN CN201980052537.3A patent/CN112567154A/zh active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013043373A1 (en) * | 2011-09-22 | 2013-03-28 | Borgwarner Inc. | Chain drive tensioner spring force control mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020030221A1 (de) | 2020-02-13 |
| CN112567154A (zh) | 2021-03-26 |
| DE112019003937A5 (de) | 2021-05-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1797349B1 (de) | Hydraulischer spanner | |
| EP2027403B1 (de) | Dichtungsanordnung zur druckentlastung | |
| DE102016207779B4 (de) | Spannvorrichtung für einen Kettentrieb | |
| DE10297397T5 (de) | Kettenspanner | |
| EP3026293B1 (de) | Federpaket | |
| DE102016216491B4 (de) | Zugmittelspanneinheit für einen Zugmitteltrieb | |
| WO2016066599A1 (de) | Kühlkanalabdeckung sowie mit einer kühlkanalabdeckung versehener kolben | |
| EP3827182B1 (de) | Hydraulische spannvorrichtung für einen kettentrieb | |
| EP3191729B1 (de) | Führungseinrichtung für den bremssattel einer schwimmsattelscheibenbremse | |
| WO1996005413A1 (de) | Hydraulisches spielausgleichselement für die ventilsteuerung von brennkraftmaschinen | |
| DE10197231B4 (de) | Kettenspannvorrichtung | |
| DE102008057222A1 (de) | Lageranordnung | |
| EP0208979A1 (de) | Überlastsicherung | |
| EP3833889A1 (de) | Hydraulische spannvorrichtung mit zwei kolben | |
| EP3452739B1 (de) | Hydraulische spannvorrichtung für einen kettentrieb | |
| DE102019120127A1 (de) | Hydraulische Spannvorrichtung mit zwei Kolben | |
| DE102018119067A1 (de) | Hydraulische Spannvorrichtung mit zwei Kolben | |
| DE102018110029B4 (de) | Hydraulische Spannvorrichtung für einen Kettentrieb | |
| DE102006036820B4 (de) | Sicherungselement zur axialen Sicherung eines Lagers auf einer Welle | |
| WO2016012136A1 (de) | Kraftstoffhochdruckpumpe, insbesondere steckpumpe | |
| DE102012013122A1 (de) | Hydrostatische Axialkolbenmaschine | |
| DE102011082591A1 (de) | Axiallagerung bei Doppelnockenwellen, Nockenwellenverstellvorrichtung und Verbrennungskraftmaschine | |
| DE102017127810A1 (de) | Spannvorrichtung mit Nachstelleinrichtung | |
| DE102020109638A1 (de) | Hydraulische Spannvorrichtung | |
| DE102021113993A1 (de) | Hydraulische Spannvorrichtung |
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 |
|
| 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: 20210309 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 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: 20220121 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 20220601 |
|
| P01 | Opt-out of the competence of the unified patent court (upc) registered |
Effective date: 20230522 |