EP4313490A1 - Tête d'outil pour un outil - Google Patents

Tête d'outil pour un outil

Info

Publication number
EP4313490A1
EP4313490A1 EP22718616.0A EP22718616A EP4313490A1 EP 4313490 A1 EP4313490 A1 EP 4313490A1 EP 22718616 A EP22718616 A EP 22718616A EP 4313490 A1 EP4313490 A1 EP 4313490A1
Authority
EP
European Patent Office
Prior art keywords
tool
head
tool head
opening
head body
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
Application number
EP22718616.0A
Other languages
German (de)
English (en)
Inventor
Andreas Lehr
Amir Qasem Mohamed Dennis SCHÖNENBERG-MASOUD
Maximilian CHRISTIANS
Egbert Frenken
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gustav Klauke GmbH
Original Assignee
Gustav Klauke GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE202021101592.6U external-priority patent/DE202021101592U1/de
Application filed by Gustav Klauke GmbH filed Critical Gustav Klauke GmbH
Publication of EP4313490A1 publication Critical patent/EP4313490A1/fr
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
    • B25B27/026—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same fluid driven
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
    • B25B27/10—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same inserting fittings into hoses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
    • B25B27/146—Clip clamping hand tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/005—Hydraulic driving means

Definitions

  • the invention relates to a tool head for a tool, in particular for a hydraulically actuatable tool, wherein the tool head, based on a side view, has an essentially C-shaped head body with two C-legs lying opposite one another along a longitudinal axis of the tool head and one die C-leg connecting bridge, wherein a first C-leg has a first tool carrier for receiving a first tool part, and wherein a second C-leg has a second tool carrier for receiving a second tool part, the second tool carrier towards the first tool carrier is displaceably mounted in the tool head, so that the second tool carrier can be displaced from an initial position remote from the first tool carrier by passing through a device mouth of the C-shaped head body into a working end position adjacent to the first tool carrier, and the connecting web relative to a Side view transverse to the longitudinal axis of the tool head has a plurality of through-openings arranged one behind the other along the longitudinal axis, with adjacent through-openings being separated by a material strut.
  • the invention also relates to a method for producing such a tool head.
  • Tool heads of the aforementioned type are known in the prior art in different designs.
  • the tool heads are used in connection with the corresponding tool parts, for example for pressing, Cutting or punching workpieces.
  • a tool with a tool head is described in EP 1084798 B1, also published as US Pat. No. 6,718,870 B1.
  • the tool head essentially in one piece and from the same material.
  • the tool head can then be connected directly or indirectly via an adapter to a hydraulic unit, preferably by means of a cylindrical design in the direction of its longitudinal axis.
  • the tool can be designed as an exclusively hand-held tool with a rod-shaped body tool base, so that the tool can be operated with one hand, or alternatively as a tool with a separately provided hydraulic unit that is connected to the tool head via a hydraulic hose.
  • Tool heads of the aforementioned type but only tool heads without the mentioned through-openings have become known who are usually made in the forging process.
  • the head body of the tool head is produced by a metal casting process.
  • the head body can be made of steel or titanium.
  • the tool head, manufactured using the metal casting process has the consistency of conventionally forged steel, although it can be produced more cost-effectively.
  • a preferably void-free or at least void-reduced design of the tool head can be achieved by, in particular, production as part of a precision casting process using heat-treatable steel.
  • the tool head can also have an alloy that is predominantly based on titanium, which means that further weight savings can be achieved.
  • the connecting web of the tool head has, based on a side view transversely to the longitudinal axis of the tool head, a plurality of through-openings lying one behind the other along the longitudinal axis.
  • the through-openings serve to discharge age-related cracks in the connecting web, for example, which could otherwise penetrate the connecting web completely up to an edge region remote from the device mouth of the head body and thus result in parts of the tool head being thrown away or at least falling off.
  • the above-mentioned through-openings make it possible to achieve a considerable weight saving of the tool head, and on the other hand, the formation of the tool head from a cast metal can be advantageously supplemented, since any instabilities caused by cavities in the cast material can then also be compensated for.
  • the through-openings made in the connecting web thus achieve an improvement in topology, which makes it possible to reduce the tool head to a base structure that ensures the necessary stability with the load or forces that are typically to be withstood.
  • such tool heads are suitable in practice for forces of more than 100 kN, for example 120 kN or even more.
  • high weight savings can be achieved, the previously described structure of the connecting web having the through openings also being able to ensure advantageous fracture behavior.
  • the material saving to be achieved through the through-openings is limited by the required strength and rigidity of the tool head.
  • a geometry can be achieved which cannot be achieved using conventional manufacturing processes such as forging.
  • the through-openings are introduced into the tool head, namely in its connecting web, in such a way that the essential support structures of the original geometry are retained without through-openings.
  • the weight saving due to the through openings can be, for example, 25 percent or more of the original tool head.
  • the through-openings it is recommended for the safety function achieved by the through-openings that at least one of the through-openings is formed directly parallel next to the device mouth of the head body, namely in relation to the longitudinal axis of the tool head in a section of the connecting web arranged parallel to the device mouth. Due to the design, a crack starting from the device mouth of the tool head ends in a through opening and not at an outer edge area of the connecting web. A part of the connecting web that is further away from the device mouth can thus remain intact if a crack occurs due to the end of the service life of the tool head. It becomes effective prevents parts of the tool head from jumping off and being thrown away or falling down.
  • an edge region of the connecting web spaced apart from the device mouth by the through-openings has an edge height transverse to the longitudinal axis which is 20 percent to 40 percent of an opening height of a through-opening.
  • the material thickness of the edge region remaining on the outer edge of the connecting web next to the through-openings is therefore significantly less than the pub- lishing height of the adjacent through-opening.
  • the ratio between the height of the material cutout of the through-opening and the remaining edge area of the connecting web is in any case dimensioned in such a way that the stability required in relation to the tool head is maintained.
  • the connecting web has three to five, in particular four, through-openings which, based on the side view, are arranged in an arcuate manner next to one another transversely to the longitudinal axis of the tool head from the first C-leg to the second C-leg are.
  • the juxtaposition of the through-openings can thus essentially follow the C-shape of the tool head.
  • this can result in a star-shaped arrangement of the through-openings around the geometric center, with the through-openings starting from the device mouth radially in the direction of the of the Extend the edge area of the connecting web facing away from the device mouth, but do not cut through any residual material in the edge area. Due to the arcuate arrangement of the through-openings around a circumferential section of the device mouth, cracks can appear from any point emanating from the device mouth, are successfully intercepted so that they cannot completely cut through the connecting web, but instead end up in a passage opening adjacent to the device mouth.
  • Two or more of the material struts can be designed to diverge from one another with respect to their respective central longitudinal axis, al tendencies at a great distance from one another in areas of the material that are remote from the device mouth.
  • one, several or all through-openings widen starting from the device mouth of the head body up to an edge area of the connecting web facing away from the device mouth of the head body.
  • the through-opening thus widens, so that the material cutout is formed to a relatively larger extent towards the outer edge region of the connecting web, so that the device mouth of the head body is surrounded by a relatively large amount of material and thus the stability of the head body is not reduced.
  • the weight of the tool head is redu adorned by the Materialaus savings of the through openings.
  • the widening is achieved in particular by a mutually diverging alignment of two, three or all of the material webs with respect to one another.
  • the material strut based on a viewing direction transverse to the opening plane of the through-opening, has a strut width which corresponds to approximately 10 percent to 50 percent of an opening width of the through-opening.
  • the material struts formed between the through-openings are thus substantially thinner than the width of the through-opening. This increases the probability that one of the device mouth of the Head body outgoing crack ends in a through hole, much higher than the probability that the crack reaches a material strut and there can cut through the entire connecting web in the radial direction, so that there is a separation of parts of the tool head.
  • one, several or all material struts starting from the device mouth of the head body up to an edge region of the connecting web facing away from the device mouth of the head body, have a substantially constant strut width.
  • the material struts are therefore preferably no wider adjacent to the device mouth than at the outwardly pointing edge area of the connecting web, so that the previously described transition area between the device mouth and the material strut is as narrow as possible and the probability of damage from a tear is particularly low.
  • the material struts widen starting from the device mouth, so that their stability is increased in the outer edge area of the connecting web.
  • the material strut is essentially waist-shaped in relation to a viewing direction transverse to the opening plane of the through-opening, the material strut extending from the device mouth of the head body to an edge region of the connecting web facing away from the device mouth of the head body first tapers and then widens again.
  • the material struts can be tapered in relation to their longitudinal extension in a central area in order to further reduce the weight of the tool head. Due to the relatively broader configuration at the transition areas to the device mouth and the edge area remote from the device mouth Connecting webs can also be maintained a stable basic shape of the tool head.
  • a through-opening has an opening width which corresponds to approximately 50 percent to 100 percent of a width of the device mouth of the head body.
  • one of several through-openings in particular can have a particularly large opening width, so that the through-opening runs along a large part of the longitudinal extension of the device mouth and cracks starting from the device mouth thus end in the through-opening and do not run to a material strut .
  • One of several openings can thus be substantially larger relative to the other through-openings, e.g. H. wider, be designed, for example, have a twice as large Publ voltage width.
  • a more or less wide opening can be provided.
  • the method including the head body of the tool head being produced by metal casting.
  • the head body be made by cast iron of steel or titanium.
  • a linen cast can be a lost wax cast.
  • the model which is first produced for this purpose in order to then surround it with a Lorm compound, can also consist of another meltable material such as plastic, as an alternative to wax.
  • FIG. 1 shows a tool with a tool head according to the invention according to a first embodiment
  • FIG. 4 shows a plan view of the tool according to FIG. 1,
  • FIG. 5 shows a tool with a tool head according to the invention according to a second embodiment
  • FIG. 8 shows a plan view of the tool according to FIG. Description of the embodiments
  • FIGS. 1 to 4 show two different possible embodiments of a tool 2, with FIGS. 1 to 4 relating to a first embodiment and FIGS. 5 to 8 relating to a second possible embodiment.
  • FIGS. 1 to 8 are not to be understood as restrictive here, but rather serve to explain the possible features.
  • FIG. 1 first shows a tool 2 with a rod-shaped hull tool base 20, at the free end piece 21 of which an accumulator 22 for supplying energy to the tool 2 is arranged.
  • the tool 2 is here, for example, a hydraulically operated crimping tool 2. Alternatively, however, the tool 2 can also be modified in such a way that it serves other purposes, for example cutting or punching workpieces.
  • the body tool base 20 also has a handle 23 by which a user can guide the tool 2 .
  • the tool 2 can also have another handle part, not shown here, in order to be able to guide and hold particularly heavy tools 2 safely, especially if one-handed operation is not possible due to the weight .
  • tools 2 can also be designed that have a separately provided unit, in particular a separate energy supply device, a separately provided hydraulic unit that is connected to a tool head 1 of tool 2 via a hydraulic hose, or the like .
  • the tool head 1 of the tool 2 is connected via an adapter 24 to a hydraulic unit, which is integrated into a trunk tool body 25 of the tool 2 .
  • the tool head 1 of the tool 2 has an integral one-piece head body 3 .
  • the head body 3 can be designed approximately C-shaped overall.
  • the head body 3 has a first C-leg 4 and a second C-leg 5, which are connected by a connecting web 6 configured essentially parallel to the longitudinal axis x.
  • the two C-legs 4, 5 and the connecting web 6 span a device mouth 11 into which a workpiece to be machined by means of the tool 2 can be inserted.
  • the first C-leg 4 has a first tool carrier 7 .
  • the second C-leg 5 has a second tool carrier 8 .
  • the first tool carrier 7 is integrally formed in one piece with the first C-leg 4, while the second tool carrier 8 relative to the first tool carrier 7 in the device mouth 11 is displaceable.
  • the second tool carrier 8 can be displaced hydraulically here, for example, by means of a hydraulic piston 26 that is linearly displaced in the tool body 25 in the body.
  • Each of the two tool carriers 7, 8 is used for preferably releasably receiving a tool part 9, 10, the first tool carrier 7 carrying a first tool part 9 and the second tool carrier 8 carrying a second tool part 10.
  • the tool part 9, 10 and the tool carrier 7, 8 have corresponding holding means 27, 28.
  • the respective tool part 9, 10 can be locked with the corresponding tool carrier 7, 8 for example.
  • the second tool carrier 8 which is mounted in the body tool body 25 in a linearly displaceable manner, can preferably be removed via the device mouth 11 from the head body 3 of the tool head 1 .
  • the tool head 1 has a plurality of through openings 12, 13, 14, 15 on the connecting web 6, which are separated from one another by material struts 17, 18, 19.
  • An opening plane of the passage openings 12, 13, 14, 15 lies parallel to a plane in which the head body 3 is C-shaped, as can be seen in FIGS. 2 and 3, for example.
  • a narrow edge region 16 which tool head 1 ensures the stability of the work.
  • the edge region 16 has an edge height r which corresponds to approximately 25 percent of an opening height h of the passage opening 12, 13, 14, 15.
  • the material struts 17, 18, 19 existing between the through-openings 12, 13, 14, 15 have a slightly waisted shape, with the respective material strut 17, 18, 19 extending from the device mouth 11 to the edge region 16 of the connecting web 6.
  • a mean strut width d in the area of the narrowest point of the waisted course of the material strut 17, 18, 19 is approximately 20 percent of an opening width b of an adjacent through-opening 12, 13, 14, 15.
  • the through-opening 13 is particularly large and has an opening width b and opening height h, which are significantly larger than the opening widths b and opening heights h of the other through-openings 12, 14, 15.
  • the through-opening 13 extends in one direction parallel to the longitudinal axis x almost along an entire width z of the device mouth 11.
  • the size of the dia- openings 12, 13, 14, 15 with their specific opening width b and opening height h thus saves on the one hand the weight of the tool head 1 and on the other hand interrupts crack growth as soon as a crack arrives in a through opening 12, 13, 14, 15.
  • fractures or cracks as a result of any casting defects, such as blowholes are not critical.
  • the tool head 1 is made here, for example, as part of a precision casting process made of steel or titanium.
  • the through openings 12, 13, 14, 15 follow the overall arcuate configuration of the connecting web 6 and are therefore not formed on a line parallel to the longitudinal axis x of the tool head. As a result, a distance between a through-opening 12, 13, 14, 15 and the device mouth 11 can be essentially maintained, so that the probability of unwanted crack propagation along the circumference of the device mouth 11 is essentially equally low.
  • FIGS. 1 to 4 show an alternative embodiment of a tool head 1 according to the invention
  • FIGS. 1 to 4 are smaller and have opening widths b and opening heights h that are similar to one another.
  • the tool head 1 becomes more stable overall and can absorb larger loads compared to the tool head 1 of the first embodiment.
  • the material struts 17, 18, 19, as can be seen in particular in FIGS. 6 and 7, have a strut width d that is essentially constant along their longitudinal extent.
  • the passage openings 12, 13, 14, 15 also follow of Figures 5 to 8 an arc shape along the circumference of the essentially C-shaped head body 3.
  • a tool head 1 for a tool 2 which is characterized in that the head body 3 of the tool head 1 is produced by a metal casting process.
  • a tool head 1 for a tool 2 which is characterized in that the head body 3 is made of steel or titanium.
  • a tool head 1 for a tool 2 which is characterized in that an edge region 16 of the connecting web 6, spaced apart from the device mouth 11 by the through-openings 12, 13, 14, 15, has an edge height transverse to the longitudinal axis x has, which is 20 percent to 40 percent of an opening height h of a through-opening 12, 13, 14, 15.
  • a tool head 1 for a tool 2 which is characterized in that the connecting web 6 has three to five, in particular four, through openings 12, 13, 14, 15, which, based on the side view, are transverse to the longitudinal axis x of the tool head 1 from the first C-leg 4 to the second C-leg 5 are arranged in an arc next to one another.
  • a tool head 1 for a tool 2 which is characterized in that the through-opening 12, 13, 14, 15 extends from the device mouth 11 of the head body 3 to an edge area facing away from the device mouth 11 of the head body 3 16 of the connecting web 6 widens.
  • a tool head 1 for a tool 2 which is characterized in that the material strut 17, 18, 19 has a strut width d that is approximately 10 percent to 50 percent of an opening width b of the through opening 12, 13, 14, 15 corresponds.
  • a tool head 1 for a tool 2 which is characterized in that the material strut 17, 18, 19 extends from the device mouth 11 of the head body 3 to an edge region 16 of the connecting web 6 has a substantially constant strut width d.
  • a tool head 1 for a tool 2 which is characterized in that the material strut 17, 18, 19 is essentially waist-shaped in relation to a viewing direction transverse to the opening plane of the through-opening 12, 13, 14, 15, wherein the material strut 17, 18, 19, starting from the device mouth 11 of the head body 3 to an edge region 16 of the connecting web 6 facing away from the device mouth 11 of the head body 3, first tapers and then widens again.
  • a tool head 1 for a tool 2 which is characterized in that, based on a direction parallel to the longitudinal axis x of the tool head 1, a through-opening 12, 13, 14, 15 has an opening width b has, which approximately 50 percent to 100 percent of a width z of the device Mau les 11 of the head body 3 corresponds.
  • a method for producing a tool head which is characterized in that the head body 3 of the tool head 1 is produced by metal casting, in particular investment casting of steel or titanium.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
  • Forging (AREA)

Abstract

L'invention concerne une tête d'outil (1) pour un outil à commande hydraulique (2). La tête d'outil (1) présente, lorsqu'elle est observée latéralement, un corps de tête sensiblement en forme de C (3) avec deux branches en C (4, 5) opposées l'une à l'autre le long d'un axe longitudinal (x) de la tête d'outil (1), et la tête d'outil comporte également une bande de liaison (6) qui relie les branches en C (4, 5). Une première branche en C (4) présente un premier support d'outil (7) destiné à recevoir une première partie d'outil (9), et une seconde branche en C (5) présente un second support d'outil (8) destiné à recevoir une seconde partie d'outil (10). Le second support d'outil (8) est monté dans la tête d'outil (1) de manière à être mobile vers le support d'outil (7) de telle sorte que le second support d'outil (8) peut être déplacé d'une position de départ éloignée du premier support d'outil (7) à une position de travail finale adjacente au premier support d'outil (7), traversant ainsi une mâchoire de dispositif (11) du corps de tête en forme de C (3), et la bande de liaison (6) présente de multiples ouvertures traversantes (12, 13, 14, 15) se trouvant les unes derrière les autres le long de l'axe longitudinal (x) comme observé latéralement transversalement à l'axe longitudinal (x) de la tête d'outil (1), des ouvertures traversantes adjacentes (12, 13, 14, 15) étant séparées par un renfort de matériau (17, 18, 19), et le corps de tête (3) de la tête d'outil (1) étant produit à l'aide d'un procédé de coulée de métal. L'invention concerne de plus un procédé de production d'une tête d'outil (1). Selon le procédé mentionné ci-dessus, le corps de tête (3) de la tête d'outil (1) est produit à l'aide d'un procédé de coulée de métal, en particulier par coulée délicate d'acier ou de titane.
EP22718616.0A 2021-03-25 2022-03-25 Tête d'outil pour un outil Pending EP4313490A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE202021101592.6U DE202021101592U1 (de) 2021-03-25 2021-03-25 Werkzeugkopf für ein Werkzeug
DE102022106499.9A DE102022106499A1 (de) 2021-03-25 2022-03-21 Werkzeugkopf für ein Werkzeug
PCT/EP2022/057861 WO2022200543A1 (fr) 2021-03-25 2022-03-25 Tête d'outil pour un outil

Publications (1)

Publication Number Publication Date
EP4313490A1 true EP4313490A1 (fr) 2024-02-07

Family

ID=81386621

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22718616.0A Pending EP4313490A1 (fr) 2021-03-25 2022-03-25 Tête d'outil pour un outil

Country Status (5)

Country Link
US (1) US20240165777A1 (fr)
EP (1) EP4313490A1 (fr)
KR (1) KR20230160887A (fr)
AU (1) AU2022242029A1 (fr)
WO (1) WO2022200543A1 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19944229B4 (de) 1999-09-15 2016-07-28 Gustav Klauke Gmbh Hydraulisches Handpressgerät und auswechselbarer Gerätekopf hierfür
US6227030B1 (en) * 1999-12-17 2001-05-08 Fci Usa, Inc. Electrical connector crimping die with over-crimp prevention surface and method
US6619101B1 (en) * 2002-04-19 2003-09-16 Fci Americas Technology, Inc. Crimping tool head with reinforcing beams for optimizing weight
US9774159B2 (en) * 2015-01-16 2017-09-26 Ridge Tool Company Deflection compensating press tools
DE102016111874A1 (de) * 2016-06-29 2018-01-04 Gustav Klauke Gmbh Verfahren zum Betreiben eines hydraulisch betriebenen Handgerätes sowie hydraulisch betriebenes Handgerät
CN108356498A (zh) * 2018-03-26 2018-08-03 艾默生管道工具(上海)有限公司 压接工具

Also Published As

Publication number Publication date
KR20230160887A (ko) 2023-11-24
AU2022242029A1 (en) 2023-09-21
US20240165777A1 (en) 2024-05-23
WO2022200543A1 (fr) 2022-09-29

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