• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Tread (1) for tires, this tread having a tread surface (10) intended to come into contact with a road surface and comprising at least one groove (2) of depth P delimited by two side walls (21, 22 ) facing each other, said sidewalls being interconnected by a bottom (20), at least one groove having a plurality of closing devices (5) for reducing the rolling resonance noise generated by this groove, each device (5) ) comprising at least two sets of flexible blades, a first series (50) is bonded to the bottom (20) of the groove and is provided to flex about a first axis (XX ') and at least a second series (51) linked to a side wall delimiting the groove, this second series (51) being provided to bend around a second axis (YY '), this second axis being distinct from the first axis, this tread being such that each blade of the first series stretches at a maximum height H at most equal to 25% of the depth P measured from the bottom (20) of the groove when new, each second series (51) comprises at least two flexible blades (511) extending at least half the width of the groove, the flexible blades of the first and second series have complementary and appropriate geometries to cooperate with each other to close at least 70% of the cross section of the groove.
    公开号:FR3029842A1
    申请号:FR1462335
    申请日:2014-12-12
    公开日:2016-06-17
    发明作者:Gael Roty
    申请人:Michelin Recherche et Technique SA Switzerland ；Compagnie Generale des Etablissements Michelin SCA；Michelin Recherche et Technique SA France；
    IPC主号:
    专利说明:

    [0001] - 1 - P10-3487 EN ATTENUATING DEVICE. 'EXIT IN TIRE MOVEMENT. FIELD OF THE INVENTION [0001] The present invention relates to tire treads and more particularly to treads comprising grooves which are provided with closing devices for reducing the noise generated by resonating the air. in these grooves when driving. STATE OF THE ART [0002] As a rule, a tire comprises a tread intended to be in contact with a road when driving a vehicle provided with tires. This tread is provided with a carving pattern formed of relief elements, these elements defining grooves for the drainage of water present on the road in rainy weather. However, the presence of grooves and in particular of circumferentially oriented grooves, is a source of noise when rolling. Definitions: A block is a raised element formed on the tread which is delimited by recesses or grooves and comprising side walls and a contact face intended to come into contact with the roadway. This contact face has a geometric center defined as the center of gravity or center of gravity of the face. [0005] A rib is a raised element formed on a tread, this element extending in the circumferential direction and running around the tire. A rib comprises two side walls and a contact face, the latter being intended to come into contact with the roadway during driving. By radial direction means in this document any direction which is perpendicular to the axis of rotation of the tire (this direction corresponds to the direction of the thickness of the tread). By transverse or axial direction means a direction parallel to the axis of rotation of the tire. By circumferential direction is meant a direction that is tangent to any circle centered on the axis of rotation. This direction is perpendicular to both the axial direction and a radial direction. [0009] A groove designates the space delimited by material walls facing each other, these walls being interconnected by a groove bottom. Under the usual conditions of rolling, the walls delimiting this groove can not come into contact with each other. The tread surface of a tread corresponds to the surface of the strip intended to come into contact with a ground when driving a tire provided with such a band. [0011] It is known that the passage in the contact region of a tread with a road, during driving, generates an air flow in each groove. With the road, each groove forms a kind of tube having two open ends, the length of the tube corresponding to the length of the contact footprint. The air contained in this tube forms a column of air which is vibrated during rolling and whose resonance frequency depends on the length separating the two ends of the tube and consequently on the length of the groove. contact with the roadway. [0013] This resonance of the air in the grooves has the consequence of generating, in a vehicle equipped with these tires, a noise inside the vehicle and a noise outside the vehicle. These indoor and outdoor noise most often correspond to a frequency close to or equal to 1 kHz corresponding to a frequency particularly sensitive to the human ear. In order to reduce such resonance noise, it is known to dispose (see for example the patent document FR2715891), in each circumferential or generally circumferential orientation groove, a plurality of noise attenuator devices, each device being composed of relatively thin rubber flexible membranes or blades, each membrane or flexible blade occupying the entire section of the groove or at least a large portion thereof to form a closure device. The placement of these flexible blades changes the length of each air pipe and thereby allows to change the resonance frequency. This results in a modification of the perceived noise. The elastic nature of the material of each flexible blade also ensures sufficient return forces to ensure the return of the flexible blades in a closed position of the groove when there is no longer any flow of liquid in said groove. Each flexible blade may extend from the bottom of the groove or be attached to at least one of the walls defining said groove. By relatively thin, it is meant that each flexible blade is able to bend to at least partially open the section of the groove under the effect of a liquid flow in particular when driving in rainy weather. These same blades remain in the closed position of the groove during driving in dry weather. As has been recalled above, the devices formed of flexible blades described in the prior art - because of the need to be able to flex under a flow of liquid - are connected either to the bottom of a groove or to one of the walls. lateral delimiting a groove. With these flexible blades, the length of the air column in each circumferential groove is reduced with respect to the total length of the groove in the contact, which leads to a change in the resonance frequency. The frequency shift is towards resonance frequency values that are less sensitive to the human ear. In devices formed of a single blade carried by the bottom of a groove of given depth, it is sometimes difficult to reconcile good molding and good flexibility of the blade. Indeed, the higher the height of the flexible blade increases and the arrival of material during molding is difficult especially as the thickness of each flexible blade is low. This state of affairs leads the person skilled in the art to certain compromises, in particular on the thickness of the flexible blade. This results in greater rigidity in the new state for each flexible blade, this increase in rigidity being even more sensitive after partial wear. This same type of disadvantage is encountered with devices formed of flexible blades carried by one or two side walls. EP 908330-B1 discloses a noise reducing device, this device being formed by three flexible blades, two of which are attached to the walls delimiting a groove and the third at the bottom of this groove. In this arrangement the blade fixed on the bottom extends to the running surface in new condition and poses the same problems of realization as those already mentioned. Moreover, the other two blades do not have sufficient flexibility. The present invention proposes a solution to this problem. [0020] The expression "side wall delimiting a groove" is interpreted herein to mean one or the other of the side walls facing each other, these walls being connected to one another by a bottom of one another. groove. The height of the groove bottom corresponds to the legal limit of wear identified by at least one wear indicator. BRIEF SUMMARY OF THE INVENTION [0021] The present invention is an improvement of the groove closure devices allowing reduction of the resonance noise and aims both to obtain easy molding and demolding of the flexible blades forming the closure device. grooves as well as a complete closure of the groove. [0022] For this purpose, the subject of the invention is a tread for a tire, this tread having a running surface intended to come into contact with a roadway and comprising at least one groove of width W and depth P delimited by two side walls facing each other, these side walls being interconnected by a groove bottom. At least one groove has a plurality of closing devices for reducing the rolling resonance noise generated by this groove, each closure device comprising at least two sets of flexible blades, a first series is connected to the bottom of the groove and is provided to flex about a first axis and at least a second series connected to a side wall defining the groove, said second series being provided to flex about a second axis, said second axis being distinct from the first axis. The tread according to the invention is such that: [0024] each blade of the first series extends over a maximum height H at most equal to 25% of the depth P measured from the bottom of the groove in new condition; Each second series (51) comprises at least two flexible blades (511) extending over at least half the width of the groove; 100261 - the flexible blades of the first and second series have complementary geometries and suitable to cooperate with each other to close at least 70% of the cross section of the groove. Advantageously, each second series connected to a wall comprising at least two flexible blades, each of these flexible blades having two lateral faces obstructing the flow of air in the groove, these lateral faces being connected to one another by means of edge walls forming the thickness of the blade, an upper edge wall being intended to come into contact with the road during rolling and a lower edge wall facing the bottom of the groove in which the closure device is arranged, the lower edge wall forming a non-zero average angle A with a direction passing through the connection points between the side walls and the bottom of the groove, this angle A being such that the lower edge wall tends to move apart the bottom of the groove when it is traversed from the side wall on which it is fixed; Preferably, the average angle A of the lower edge of the flexible blades of each second series is at least equal to 10 ° and even more preferably at least equal to 20 ° in order to facilitate demolding by reducing the forces acting on the blades during the demolding operation. In a variant of the invention, the flexible blades of the first series and of each second series are arranged so as to be offset relative to each other so as to allow a partial overlap between the lateral faces of said blades taken. two to two and thus achieve a more complete closure of the section of the groove. With this device, the first set of flexible blades can bend around a first axis passing through the contact points of these blades with the bottom of the groove; bending under the effect of a liquid flowing in the groove leads the first set of flexible blades to press against the bottom of the groove. Each second series of flexible strips bonded to a side wall delimiting the groove has a tendency to bend around an axis parallel to said wall; bending under the effect of a liquid flowing in the groove leads each second set of flexible blades to press against the side wall. More preferably, the maximum height H of each flexible blade of the first series fixed on the bottom of the groove is at most equal to 15% of the depth of the groove. Advantageously, the first axis of bending is perpendicular or almost perpendicular to the second axis of bending (in the latter case the angular difference between the two directions is at least equal to 80.degree.). Advantageously, the flexible blades of the device according to the invention cooperate to close the section of the groove over at least 90% of the section of said groove in the new state Advantageously, the thickness of each flexible blade carried by the groove bottom is less than the thickness of each flexible blade carried by a side wall. Advantageously, the thickness of each flexible blade fixed to the bottom of the groove is at most equal to 0.4 mm. In a variant of the invention, the noise reduction device formed in a groove comprises a first series of flexible blades of triangular geometry connected to the bottom of the groove. In another variant, the noise reduction device formed in a groove comprises a first series of flexible blades of triangular geometry connected to the bottom of the groove, the first series of blades comprising at least two flexible blades. In this variant of the invention, the formation of two flexible blades carried by the bottom of the groove makes it possible to obtain great flexibility regardless of the level of wear of the strip. In another variant, the noise reduction device formed in a groove comprises a first series of flexible blades of triangular geometry connected to the bottom of the groove and at least a second series of flexible blades carried by a side wall of which the shape is complementary to that of the first series to close the section of the groove, these first and second series being offset with respect to one another in the main direction of the groove so as to be able to generate an overlap between said blades and thus get a better closure of the groove section. By main direction of a groove here means the direction followed by the liquids that can be caused to flow in said groove during driving in rainy weather. With the device according to the invention, it is both possible to close the entire groove in the new state while maintaining a high degree of flexibility of each part of the device and this whatever the state of the art. wear of the band. This noise reducing device can of course be implemented with any type of groove, whether it is a circumferential orientation groove, or transverse or oblique. Other features and advantages of the invention appear from the description given below with reference to the accompanying drawings which show, by way of non-limiting examples, embodiments of the object of the invention. . BRIEF DESCRIPTION OF THE FIGURES [0042] FIG. 1 shows a surface view of a tread according to the invention in the new state; [0043] Figure 2 shows a device according to the invention in a closed position of a groove; Figure 3 shows the device of Figure 2 in an open position under the action of a flow of liquid in the groove; Figure 4 shows a variant of the invention in a closed position of a groove; Figure 5 shows a variant of the invention in a closed position of a groove; FIG. 6 shows a view of the running surface of the variant shown in FIG. 5. DESCRIPTION OF THE FIGURES [0048] For the figures accompanying this description, the same reference signs may be used to describe variants of FIG. the invention since these reference signs refer to elements of the same nature, whether this nature is structural or functional. Figure 1 shows a partial view of the surface of a tread 1 of tire, the tread 1 comprising three grooves 2 circumferential orientation 5. To reduce the noise related to the resonance of the air in each groove 2 when passing through the road contact, a plurality of resonance noise reducing devices are formed in each groove. In Figure 2, one of these devices is shown in the closed state, that is to say in a position such that the cross section of the groove is closed - here the section 10 of the groove is closed on 90% of its surface - by this device to reduce the length of the air-filled hose that can resonate and at the same time prevent air circulation. In this FIG. 2, a groove 2 of generally circumferential orientation formed on the tread 1 can be distinguished in section. This groove of width W is delimited by lateral walls 21, 22 of relief elements. side walls vis-à-vis being connected by a bottom groove 20. This groove 2 aune total depth P in the new state, that is to say before any rolling and therefore before any wear. The tread has a running surface 10 intended to come into contact with the roadway during driving. In rolling, this running surface will wear out and progressively approach the bottom of the grooves. In order to maintain a sufficient drainage capacity necessary for the safety of the user, provision is made in the grooves indicators of the limit wear not to exceed. This limit of wear is generally determined by the laws of the countries. The connection between the bottom and the side walls of a groove is precisely at this level of wear. In this groove 2 a plurality of noise reducing devices 5 have been formed, each device 5 being constituted, in this first variant of the invention, by a first series 50 comprising three flexible blades 501 linked to the bottom of the groove. and a second series 51 having a plurality of flexible blades 511 all bonded to the same side wall 21. All these flexible blades are made of rubber material of the same nature as the material constituting the relief elements of the tread. 100531 Each flexible blade 501 secured to the bottom 20 of the groove 2 has a width equal to one third of the width of the groove and has a trapezoidal shape, the outermost edge (i.e. the edge nearest the running surface 10) is inclined at an equal angle in the present case at 20 °. The outermost edges of the three blades 501 are formed so as to be in extension of one another to form a kind of continuous slope adapted to cooperate with a flexible blade 511 of the second series 51. point of these blades 501 of the first series 50 closest to the running surface 10 is at a distance H from the bottom in this case equal to 15% of the total depth P of the groove. These flexible blades 501 bonded to the bottom of the groove each have a small thickness and in this case equal to 0.4 mm. Each flexible blade 511 of the second series 51 is integral with the side wall 21 and extends over the entire width of the groove. Each flexible blade 511 of the second series comprises an upper edge 512 intended to come into operative contact with the road during rolling and a lower edge 513 which is intended to cooperate with an upper edge of another blade to ensure complementarity and thus close the section of the groove. With the exception of the blade closest to the running surface when new, all the flexible blades of the second series have upper and lower edges parallel to each other and making a mean angle A in this case equal to 20 °. This angle A is measured with respect to a direction indicated by an arrow X in FIG. 2, this direction corresponding to a direction both parallel to the running surface 10 and transverse to the groove 2. The flexible blades 511 of this second series are positioned in a common plane with the blade of the first series to ensure the closure of the groove on at least 70% of the section of this groove. As can be seen in FIG. 3 showing the same device 5 subjected to a liquid flow indicated schematically by an arrow F, each first blade 510 of the first series 50 fixed to the bottom of the groove flexes around an axis XX 'parallel to the bottom 20 of the groove while the flexible blades 511 of the second series 51 flex about an axis YY' perpendicular to the axis XX '. In this variant, the flexible blades of the second series have a thickness equal to 1 mm while the flexible blade fixed to the bottom of the groove has a thickness equal to 0.4 mm. The choice of a smaller thickness for the blades connected to the bottom of the groove is favorable since it reduces the effort required to bend these blades regardless of the level of wear of the strip while a thickness more Important for the blades attached to the side wall is favorable to regular wear of said blades. With this structure it is possible to substantially reduce the demolding forces and thus preserve a good quality of closing grooves by the device according to the invention. In a variant shown in Figure 4, a device according to the invention 10 comprises a first series 50 and two second series 51, 52 of flexible blades. The first series 50 comprises two flexible blades 501 linked to the bottom 20 of a groove 2, each blade 501 of this first series 50 having the shape of a right triangle. The vertex of each triangle furthest from the bottom of the groove is at a distance H from this bottom which is in this case equal to 20% of the depth P of the groove measured in the new state. Each side wall 21, 22 of the groove 2 is provided with a series of flexible blades 511, 521 respectively - in this case five flexible blades of similar geometry with the exception of the blades closest to the surface 10. All these blades are formed in the same plane and have complementary geometries to close on at least 70% the section of the groove when new. All the blades carried by the side walls have lower edges (that is to say facing the bottom of the groove) which are flat and straight and inclined at an average angle A equal to 25 ° in the case present. The blades of each second series cover half the width of the groove. In another variant shown in FIG. 5, a device according to the invention is quite similar to that shown in FIG. 4. Instead of two flexible blades, the first series 50 comprises only one blade 501. whose geometry is no longer triangular but circular, the point farthest from the bottom being at a distance H less than 15% of the depth P of the groove in new condition In addition and to increase the closing ratio of the section of the groove, it is advisable to form each series of 3029842 blades carried by a side wall defining the groove so that there is a slight overlap of a blade with its neighbors. An overlap is also made between the first series and each of the second two series. These overlaps can be limited to small values, for example 1 mm and this especially as the space between the flexible strips can be as small as possible while satisfying the manufacturing constraints. FIG. 6 shows a view of the running surface of the strip shown in FIG. 5. It can be seen that on both sides, in the main direction of the groove (that is, the direction of flow of a liquid within this groove) of the flexible blade 501 connected to the bottom of the groove are arranged the flexible blades 511 and 512 of the second series 51, 52 respectively. The invention having been described generally and by means of some variants, it should be understood that this invention is not limited to these only variants described and shown. In particular, when the lateral walls delimiting a groove 15 make an angle different from 90 degrees with the running surface in the new state, it is easy for the person skilled in the art to adapt the geometries of each blade to allow the section to open. the groove when driving on pavement covered with water. Moreover, the variants described here can be combined with one another by the person skilled in the art depending on the objective pursued without departing from his scope as defined by the claims.
    权利要求:
    Claims (10)
    [0001]
    1. A tread (1) for tire, the tread having a tread surface (10) intended to come into contact with a roadway and comprising at least one groove (2) of depth P delimited by two side walls (21). , 22) facing each other, these side walls being interconnected by a bottom (20), at least one groove having a plurality of closing devices (5) for reducing the rolling resonance noise generated by this groove, each device (5) comprising at least two sets of flexible blades, a first series (50) is bonded to the bottom (20) of the groove and is adapted to flex about a first axis (XX ') and at least a second series ( 51) connected to a lateral wall delimiting the groove, this second series (51) being provided to bend around a second axis (YY '), this second axis being distinct from the first axis, this tread being characterized in that : - each blade of the first series extends over a maximum height H at most equal to 25% of the depth P measured from the bottom (20) of the groove when new; each second series (51) comprises at least two flexible blades (511) extending over at least half the width of the groove; - The flexible blades of the first and second series have complementary geometries and suitable to cooperate with each other to close at least 70% of the cross section of the groove.
    [0002]
    2- tread (1) for tire according to claim 1 characterized in that each second series (51) connected to a wall comprises at least two flexible blades (511), each of these flexible blades having two side faces obstruction to the circulation of air in the groove, these lateral faces being connected to each other by edge walls forming the thickness of the blade, an upper edge wall (512) being intended to come into contact with the road during rolling and a lower edge wall (513) facing the bottom of the groove in which the device (5) is arranged, the lower edge wall (513) forming a non-zero average angle A with a direction passing through the connection points between the side walls and the bottom of the groove, this angle A being such that the lower edge wall tends to move away from the bottom of the groove when traversing this lower edge wall from the lat erale on which it is fixed.
    [0003]
    3- tire tread (1) according to claim 2 characterized in that the average angle A of the lower edge of the flexible blades (511) of each second series (51) is at least equal to 10 ° and more preferably at least equal to 20 ° in order to facilitate demolding by reducing the forces acting on the blades during the demolding operation. 10
    [0004]
    4- tread (1) for tire according to any one of claims 1 to 3 characterized in that the flexible blades (501) of the first series (50) and the flexible blades (511) of each second series ( 51) are arranged to be offset relative to each other so as to allow partial overlap between the side faces of said two-by-two blades and thus to achieve a fuller closure of the groove section.
    [0005]
    5- tread (1) for tire according to one of claims 1 to 4 characterized in that the maximum height H of each flexible blade (501) of the first series (50) fixed on the bottom (20) of the groove is at most equal to 15% of the depth P of the groove.
    [0006]
    6- tread (1) for tire according to one of claims 1 to 5 characterized in that the thickness of each flexible blade (501) carried by the bottom (20) groove is less than the thickness of each flexible blade (511) carried by a side wall of the groove.
    [0007]
    Tire tread (1) according to claim 6 characterized in that the thickness of each flexible blade attached to the bottom of the groove is at most equal to 0.4 mm. 30
    [0008]
    Tire tread (1) according to one of claims 1 to 7, characterized in that the noise reduction device formed in a groove comprises a first series (50) of flexible blades (501). of triangular geometry.
    [0009]
    Tire tread (1) according to claim 8, characterized in that the first series of flexible blades comprising at least two flexible blades.
    [0010]
    10- tread (1) for tire according to one of claims 1 to 9 characterized in that the device (5) closes the groove section on at least 90% of the section of said groove in new condition
    类似技术:
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    同族专利:
    公开号 | 公开日
    WO2016092094A1|2016-06-16|
    CN107000500A|2017-08-01|
    US10549581B2|2020-02-04|
    CN107000500B|2019-02-26|
    BR112017011786A2|2018-11-13|
    EP3230091B1|2018-10-17|
    EP3230091A1|2017-10-18|
    US20190001754A1|2019-01-03|
    FR3029842B1|2018-03-02|
    JP2017537836A|2017-12-21|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE4403662A1|1994-02-05|1995-08-10|Uniroyal Englebert Gmbh|Vehicle tyre with variable tread profile and adjustment process|
    EP0908330A1|1997-10-06|1999-04-14|Bridgestone Corporation|Heavy duty pneumatic tires|
    JP2007210569A|2006-02-13|2007-08-23|Bridgestone Corp|Pneumatic tire|
    WO2011132064A1|2010-04-20|2011-10-27|Bridgestone Corporation|Tread strip with grooves featuring noise-reducing means|
    FR2983431A1|2011-12-05|2013-06-07|Michelin Soc Tech|IMPROVED NOISE REDUCING DEVICE FOR TIRE|
    JPH03276802A|1990-03-05|1991-12-09|Bridgestone Corp|Pneumatic tire|
    JP4639974B2|2005-06-07|2011-02-23|横浜ゴム株式会社|Pneumatic tire|
    JP2010052699A|2008-08-29|2010-03-11|Bridgestone Corp|Tire|
    FR2955289B1|2010-01-19|2012-01-27|Soc Tech Michelin|TIRE TREAD COMPRISING AN IMPROVED NOISE REDUCING DEVICE|
    JP5615680B2|2010-12-01|2014-10-29|株式会社ブリヂストン|tire|
    JP5765107B2|2011-07-19|2015-08-19|横浜ゴム株式会社|pneumatic tire|
    FR2982798B1|2011-11-18|2014-01-10|Michelin Soc Tech|ANTI-NOISE RESONANCE NOISE DEVICE FOR TIRES|
    JP2013244854A|2012-05-25|2013-12-09|Bridgestone Corp|Pneumatic tire|GB201608284D0|2016-05-11|2016-06-22|Apollo Tyres Global R & D Bv|Vehicle tyre with enhanced groove design|
    EP3463787B1|2016-05-31|2020-11-25|Compagnie Générale des Etablissements Michelin|Molding element for manufacturing a noise reducing tread|
    JP6891556B2|2017-03-14|2021-06-18|住友ゴム工業株式会社|tire|
    KR20220013717A|2020-07-27|2022-02-04|한국타이어앤테크놀로지 주식회사|A pneumatic tire with reinforcing part|
    法律状态:
    2015-12-21| PLFP| Fee payment|Year of fee payment: 2 |
    2016-06-17| PLSC| Publication of the preliminary search report|Effective date: 20160617 |
    2016-12-22| PLFP| Fee payment|Year of fee payment: 3 |
    2017-12-21| PLFP| Fee payment|Year of fee payment: 4 |
    2018-12-19| PLFP| Fee payment|Year of fee payment: 5 |
    2020-10-16| ST| Notification of lapse|Effective date: 20200906 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1462335A|FR3029842B1|2014-12-12|2014-12-12|TIRE NOISE ATTENUATING DEVICE FOR TIRE|
    FR1462335|2014-12-12|FR1462335A| FR3029842B1|2014-12-12|2014-12-12|TIRE NOISE ATTENUATING DEVICE FOR TIRE|
    EP15808245.3A| EP3230091B1|2014-12-12|2015-12-11|Device for attenuating road noise for a tire|
    JP2017531492A| JP2017537836A|2014-12-12|2015-12-11|Equipment for reducing tire rolling noise|
    CN201580067313.1A| CN107000500B|2014-12-12|2015-12-11|For weakening the device of the road noise of tire|
    BR112017011786-0A| BR112017011786A2|2014-12-12|2015-12-11|device for attenuating rolling noise for a tire|
    PCT/EP2015/079485| WO2016092094A1|2014-12-12|2015-12-11|Device for attenuating road noise for a tire|
    US15/535,320| US10549581B2|2014-12-12|2015-12-11|Device for attenuating rolling noise for a tire|
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