• 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:
    The present invention relates to a vehicle tire for agricultural use, the tread is both high wear and resistance to aggression. Such a tire (1) comprises a tread (2), comprising strips (3) separated by grooves (4), each bar (3) extending radially outwards, over a radial height H, from a bottom surface (5) to a contact face (6). A first bar portion (31), in a first elastomeric mixture, extends radially inwardly from the contact face (6) to a first interface (7) over a radial distance Di to less than 0.5 times and at most equal to 1 times the radial height H. A second bar portion (32), in a second elastomeric mixture, extends radially inwards, from the first interface (7) to at the bottom surface (5) over a radial distance D2. The second elastomeric mixture extends radially inside the webs (3) and furrows (4), from the bottom surface (5) to a second interface (8), over a radial distance D3.
    公开号:FR3015362A1
    申请号:FR1363134
    申请日:2013-12-20
    公开日:2015-06-26
    发明作者:Patrick Vervaet；Daniel Rey；Gautier Lalance；Jean Luc Mangeret
    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] The present invention relates to a tire for agricultural use, such as an agricultural tractor or an agro-industrial vehicle. It relates more particularly to the tread of such a tire, intended to come into contact with a soil through a rolling surface. In what follows, the circumferential, axial and radial directions respectively denote a direction tangent to the running surface of the tire and oriented in the direction of rotation of the tire, a direction parallel to the axis of rotation of the tire and a direction perpendicular to the axis of rotation of the tire. By "radially inner, respectively radially outer" is meant "closer or more distant from the axis of rotation of the tire". By "axially inner, respectively axially outer" is meant "closer or more distant from the equatorial plane of the tire", the equatorial plane of the tire being the plane passing through the middle of the running surface of the tire and perpendicular to the tire. rotation axis of the tire. A tire for agricultural tractor is intended to ride on various types of soil such as more or less compact ground fields, unpaved access roads to fields and asphalt surfaces of roads. Given the diversity of use, in the field and on the road, a tire for an agricultural tractor, and in particular its tread, must have a compromise of performance between the traction in the field, the tear resistance, the resistance to road wear, rolling resistance, vibratory comfort on the road. The tread of an agricultural tractor tire generally comprises a plurality of bars. The bars are elements in relief with respect to a bottom surface which is a surface of revolution about the axis of rotation of the tire. [0006] A strip generally has an elongated overall parallelepiped shape, consisting of at least one rectilinear or curvilinear portion, and is separated from the adjacent strips by grooves. A strip may consist of a succession of rectilinear portions, as described in US3603370, US4383567, EP795427 or have a curvilinear shape, as presented in US4446902, EP903249, EP1831034. In the radial direction, a bar extends from the bottom surface to the running surface, the radial distance between the bottom surface and the running surface defining the height of the bar. The radially outer face of the strip, belonging to the running surface, which comes into contact with the ground during the passage of the bar in the contact area of the tire, is called the contact face of the bar. In the axial direction, a bar extends inward towards the equatorial plane of the tire, from an axially outer end face to an axially inner end face. In the circumferential direction, a bar extends, in a preferred direction of rotation of the tire, from a leading face to a trailing face. In the preferred direction of rotation is meant the direction of rotation recommended by the tire manufacturer for optimum use of the tire. For example, in the case of a tread comprising two rows of V-shaped webs or chevrons, the tire has a preferred direction of rotation according to the tip of the rafters. The leading face is, by definition, the face whose radially outer edge or leading edge first comes into contact with the ground, during the passage of the bar in the contact surface of the tire with the ground, at the during the rotation of the tire. The trailing face is, by definition, the face whose radially outer edge or trailing edge comes into contact with the ground last, during the passage of the bar in the contact surface of the tire with the ground, during the rotation of the tire. Depending on the direction of rotation, the leading face is said to be forward with respect to the trailing face. A strip usually, but not necessarily, a mean angle of inclination relative to the circumferential direction, close to 45 °. Indeed, this average angle of inclination allows in particular a good compromise between traction in the field and vibration comfort. The traction in the field is even better than the bar is axial, that is to say that its average inclination angle, with respect to the circumferential direction is close to 90 °, while the vibratory comfort is to as much better than the bar is circumferential, that is to say that its average inclination angle, with respect to the circumferential direction, is close to 0 °. It is well known that traction in the field is more strongly determined by the angle of the bar at the shoulder, which has led some tire designers to propose a very curved bar shape, leading to a bar substantially axial to the shoulder and substantially circumferential in the middle of the tread.
    [0002] 100111 The tread of an agricultural tractor tire generally comprises two rows of bars as previously described. This distribution of bars inclined relative to the circumferential direction gives the tread a V shape commonly called herringbone pattern. The two rows of bars have a symmetry with respect to the equatorial plane of the tire, with most often a circumferential offset between the two rows of bars, resulting from a rotation around the axis of the tire of one half of the tire strip. rolling relative to the other half of the tread. In addition, the strips can be continuous or discontinuous, and distributed circumferentially with a constant or variable pitch. The tread of an agricultural tractor tire thus comprises two types of elements: the bars, which are the elements in reliefs, and the grooves, which are the portions of the bottom surface separating the bars. These two types of elements are solicited in a very different way. The bars are more particularly sensitive to wear in road use and aggression by pebbles in off-road use or in the field. The furrows, between the bars, are mainly attacked by residual stubble after harvest, used in the field, and are also susceptible to chemical attack by ozone as these furrows are not subject to wear. The inventors have set themselves the goal of designing a tread for a vehicle for agricultural use, more efficient both from the point of view of the wear resistance in road use and from the point of view of the resistance to residual stubble attacks or "stubble" in field use. This object has been achieved according to the invention by a vehicle tire for agricultural use comprising: a tread intended to come into contact with a ground, comprising bars separated from each other by grooves, 4 - each bar extending radially outwards, over a radial height H, from a bottom surface to a contact face, the grooves being constituted by the portions of the bottom surface separating the bars, in each bar, a first bar portion, constituted by a first elastomeric mixture, extending radially inwards, from the contact face to a first interface, over a radial distance DI at less than 0.5 times and at most equal to 1 times the radial height H of a bar, in each bar, a second bar portion, constituted by a second elastomeric mixture, extending radially inwards, at a distance of from the first interface to the bottom surface, over a radial distance D2, and the second elastomeric mixture extending radially inside the webs and grooves, from the bottom surface to a second interface, over a radial distance D3. The invention aims to obtain a differentiation of the performance of the tread between the bars, intended, in particular, to withstand wear in road use, and grooves inter-bars, or the feet of bars, intended, in particular, to withstand the aggressions used in the field, for example to aggression by residual stubble after harvest or "stubble". The strips being the elements of the tread subjected to wear are mainly constituted, on a first portion, of a first wear-resistant elastomeric compound, while the portions of bars, positioned at the bottom of bars, close to of the bottom surface, and the inter-bar furrows, portions of the bottom surface between the webs, that is to say, the elements not subject to wear, are constituted by a second elastomer compound resistant to attack . According to the invention, for a given bar, a first bar portion extends from the contact face, intended to come into contact with the ground when rolling, to a first interface, corresponding to the radially inner limit of the first bar portion. The first interface is radially external to the bottom surface or is located at the bottom surface. A first interface radially external to the bottom surface corresponds to a radial distance between the contact face and the first interface below the radial height H of the bar, that is to say to a first portion of the bar representing less than 100% of the bar. A first interface located at the level of the bottom surface - 5 - corresponds to a radial distance between the contact face and the first interface equal to the radial height H of the strip, that is to say to a first portion of bar representing 100% of the bar. In the case where the first bar portion represents less than 100% of the bar, a second bar portion, constituted by a second elastomeric mixture, extends radially inwards, from the first interface, corresponding to the interface between the first and second elastomeric mixtures, up to the bottom surface. This second portion is the foot of the bar. Finally, the second elastomeric mixture, constituting the second bar portion, extends radially inside the bottom surface, both radially inside the bars and radially inside the grooves, up to a second interface. This portion of tire between the bottom surface and the second interface, corresponding to the radially inner limit of the second elastomeric mixture, is usually called sub-hollow. Its role is to protect the crown reinforcement of the tire radially inner to the tread vis-à-vis mechanical and physicochemical aggression. The radial distance between the bottom surface and the second interface defines the thickness of the sub-recess, which is an important feature vis-à-vis the protection of the crown reinforcement of the tire. Advantageously, the radial distance D3 between the bottom surface and the second interface is at least equal to 3 mm and at most equal to 15 mm. In other words, the thickness of the sub-hollow is between a lower limit equal to 3 mm and an upper limit equal to 15 mm. The lower limit corresponds to a minimum thickness below which the sub-hollow no longer correctly ensures its protective function vis-à-vis the crown reinforcement. The upper limit corresponds to a maximum thickness beyond which the thermal level in the summit becomes too great. This interval guarantees a compromise between holding the top of the tire to the aggressions and its endurance vis-à-vis the thermal level. Also advantageously, the first elastomer mixture having a complex dynamic shear modulus G1 * at 50% deformation and at 60 ° C., the complex dynamic shear modulus G1 * of the first elastomeric mixture is at least equal to 1.2 MPa. - 6 - and preferably at most equal to 2 MPA. A complex dynamic shear modulus Gi * at 50% deformation and at 60 ° C, included in such a range of values, gives the first elastomer mixture cohesive properties favorable to withstand road wear-type aggressions and pebbles. Still advantageously, the first elastomeric mixture having a loss factor tan (si) at 60 ° C, the loss factor tan (si) of the first elastomeric mixture is at least equal to 0.18 and at most equal to 0.32. A loss factor tan (si), included in such a range of values, makes it possible to limit the dissipation of energy. In general, the complex modulus G * and the loss factor tan (S) of an elastomeric mixture are so-called dynamic properties. They are measured on a visco-analyzer, Metravib VA4000 type, according to ASTM D 5992-96. The response of a sample of the vulcanized elastomeric mixture is recorded in the form of a cylindrical test specimen 4 mm thick and 400 mm 2 in section subjected to sinusoidal stress in alternating simple shear at the frequency of 10 Hz. at a given temperature, for example 60 ° C. A strain amplitude sweep of 0.1% to 50% is carried out in a forward cycle followed by 50% to 1% in a return cycle. The results exploited are the complex dynamic shear modulus G * and the loss factor tan (Ô). For the return cycle, we indicate the maximum value of tan (S) observed, denoted tan (S) i, na '. From the point of view of the chemical composition, the first elastomeric mixture constituting the first bar portion comprises diene elastomers, reinforcing fillers and a crosslinking system. The diene elastomers conventionally used are chosen from the group consisting of polybutadienes (BR), natural rubber (NR), synthetic polyisoprenes (PI) and styrene-butadiene copolymers (SBR). Preferably, the elastomers are used in the form of NR / BR or SBR / BR blends, or even NR / BR / SBR blends. Preferably, the SBRs used have glass transition temperatures or Tg values below -50 ° C., measured on a Metravib VA4000 visco-analyzer, according to the ASTM D 5992-96 standard. With regard to the reinforcing filler, the first elastomeric mixture comprises at least one carbon black, such as a 200 and 100 series carbon black (ASTM grades), this black having a BET specific surface area greater than 100 m2 / g and being used at a rate of between 50 and 75 phr. The first elastomeric mixture, comprising the elastomers or elastomer cuts and the carbon blacks mentioned above, has satisfactory properties in terms of resistance to road wear and aggression attacks by pebbles. Advantageously, the second elastomer mixture having a complex dynamic shear modulus G2 * at 50% deformation and at 60 ° C, the complex dynamic shear modulus G2 * of the second elastomeric mixture is at least equal to 1 MPa and preferably at most equal to 1.7 MPa. A complex dynamic shear modulus G2 * at 50% deformation and at 60 ° C of the second elastomer mixture, within a range of values, gives the second elastomeric mixture favorable levels of rigidity to limit the mechanical and favorable stresses to limit the attacks by stubble debris (Stubble). Still advantageously, the second elastomeric mixture having a loss factor tan (82) at 60 ° C, the tan loss factor (82) of the second elastomeric mixture is at least equal to 0.15 and at most equal to 0.28. A loss factor tan (82), included in such a range of values, limits the energy dissipation in the tire portion between the bottom surface and the second interface, called sub hollow. From the point of view of the chemical composition, the second elastomeric mixture, constituting the sub-hollow, comprises diene elastomers, reinforcing fillers and a crosslinking system. The diene elastomers conventionally used are preferably chosen from the group consisting of natural rubber (NR), synthetic polyisoprenes (PI) and styrene-butadiene copolymers (SBR). Preferably, the elastomers are used in the form of NR / BR or SBR / BR blends. Preferably SBR used alone or in cutting have glass transition temperatures or Tg dynamic between -65 ° C and -40 ° C, measured on a visco-analyzer type Metravib VA4000, according to ASTM D 5992-96. With regard to the reinforcing filler, the second elastomeric mixture comprises at least one carbon black, such as a black carbon black of the 300 series (ASTM grades) or even a higher series carbon black, this black having a BET specific surface area less than 100 m 2 / g and being used at a rate of between 40 and 70 phr. The compositions of the second elastomer mixture of the under-tread of the tread may also comprise all or part of the usual additives usually used in elastomer compositions intended for the manufacture of tires, in particular sealing layers, for example protective agents such as anti-ozone waxes, chemical antiozonants, anti-oxidants, anti-fatigue agents. For example, these compositions comprise protective agents such as paraffin wax at a content of between 2 and 5 phr, preferably 2 to 3 phr, and N-1,3-dimethylbutyl-phenylparaphenylenediamine (6-PPD) containing a rate of between 3 and 5 phr, preferably 3 to 4 phr. The second elastomeric mixture, comprising the elastomers or elastomer blends, the carbon blacks and the anti-oxidants and anti-ozonants mentioned above, has satisfactory properties in terms of resistance to attack by stubble debris or "Stubble" and chemical attacks of ozone type. As regards the industrial feasibility, a tire according to the invention, and more specifically the tread of such a tire, can be manufactured according to a method as described and claimed by WO 2009131578. L invention, described and claimed by WO 2009131578, relates to methods and apparatus for forming a multilayer tire component, the steps of the method comprising: -using a mechanical system, the system comprising a plurality of cutting elements; moving a sheet of material along a path of travel through the mechanical system; cutting a first strip of the sheet by means of one or more elements of the plurality of cutting elements, this step occurring during the moving step; mechanically applying the first strip to a building surface, this step occurring during the moving step; -cutting a second strip of the sheet after the cutting step of the first strip, this step occurring during the moving step; mechanically applying the second strip to a building surface, this step occurring during the moving step. Specific embodiments of the method previously described, relating to a multilayer manufacturing of the tread, have also been described by the documents WO 2013176675 and WO 2013176676. The present invention will be better understood when FIGS. 1 to 3, schematic and not shown in scale, attached in the appendix: FIG. 1: perspective view of a tire for a vehicle for agricultural use, FIG. 2: view, in a radial direction (FIG. Z), the tread of a tire for a vehicle for agricultural use, FIG. 3: sectional view, along a meridional plane (XY), of a tread portion of a tire according to the invention. . Figures 1 and 2 respectively show a perspective view of a tire 1 for a vehicle for agricultural use, and a view, in a radial direction Z, of the tread of such a tire. The tread 2, intended to come into contact with a ground via a running surface, comprises bars 3 separated from each other by grooves 4. Each strip 3 extends radially outwards from a bottom surface 5 to a contact face 6 positioned in the running surface. The grooves 4 consist of the portions of the bottom surface 5 separating the bars 3. FIG. 3 shows a cross-sectional view along a meridian plane (XY) of a tread portion 2 of a tire according to the invention. In each strip 3, a first strip portion 31, constituted by a first elastomeric mixture, extends radially inwards, from the contact face 6 to a first interface 7, over a radial distance DI at less than 0.5 times and at most equal to 1 times the radial height H of the bar. Also in each strip 3, a second strip portion 32, constituted by a second elastomeric compound, extends radially inwards, from the first interface 7 to the bottom surface 5, over a radial distance D2 . In addition, the second elastomeric mixture extends radially inside the bars 3 and furrows 4, from the bottom surface 5 to a second interface 8, over a radial distance D3. The tire portion between the bottom surface 5 and the second interface 8 constitutes the sub-hollow. The invention has been more particularly studied for an agricultural tire, in which the first elastomer mixture has a complex module. dynamic shear G1 * equal to 1.72 MPa and a loss factor tan (s1) equal to 0.29, and the second elastomer mixture has a complex dynamic shear modulus G2 * equal to 1.31 MPa and a loss factor tan (82) equal at 0.22. The first and second elastomeric mixtures may have chemical compositions different from those previously described, depending on the desired performance. The invention may be extended to a tread comprising webs consisting of a first and a second elastomeric mixtures, the second elastomeric mixture being limited by the bottom surface. The radially inner tire portion at the bottom surface may be constituted by at least a third elastomeric mixture of chemical composition distinct from those of the first and second elastomeric mixtures. The invention is applicable to any tire whose tread comprises elements in relief and capable of rolling on soils comprising aggressive indenter, such as a tire for a civil engineering vehicle.
    权利要求:
    Claims (6)
    [0001]
    CLAIMS 1- A pneumatic tire (1) for a vehicle for agricultural use comprising: a tread (2) intended to come into contact with a ground, comprising bars (3) separated from each other by grooves (4), each strip (3) extending radially outwardly, over a radial height H, from a bottom surface (5) to a contact face (6), the grooves (4) being constituted by the portions of the bottom surface (5) separating the bars (3), characterized in that, in each strip (3), a first strip portion (31), constituted by a first elastomeric mixture, extends radially inwards, from the contact face (6) to a first interface (7), over a radial distance Di at least equal to 0.5 times and at most equal to 1 times the radial height H of the bar, in in each bar (3), a second bar portion (32) constituted by a second elastomer mixture it extends radially inwardly from the first interface (7) to the bottom surface (5) over a radial distance D2, and in that the second elastomeric mixture extends radially to the inside of the bars (3) and grooves (4), from the bottom surface (5) to a second interface (8), over a radial distance D3.
    [0002]
    2 - tire (1) according to claim 1, wherein the radial distance D3 between the bottom surface (5) and the second interface (8) is at least equal to 3 mm and at most equal to 20 mm.
    [0003]
    3 - tire (1) according to one of claims 1 or 2, the first elastomeric mixture having a complex dynamic shear modulus G1 * at 50% deformation and at 60 ° C, wherein the complex dynamic shear modulus G1 * of the first elastomeric mixture is at least equal to 1.2 MPa and, preferably, at most equal to 2 MPa. 25
    [0004]
    4 - tire (1) according to any one of claims 1 to 3, the first elastomer mixture having a loss factor tan (si) at 60 ° C, wherein the loss factor tan (si) of the first elastomeric mixture is at least equal to 0.18 and at most equal to 0.32.
    [0005]
    5 - tire (1) according to any one of claims 1 to 4, the second elastomeric mixture having a complex dynamic shear modulus G2 * at 50% deformation and at 60 ° C, wherein the complex module of dynamic shear G2 * of the second elastomeric mixture is at least 1 MPa and preferably at most equal to 1.7 MPa.
    [0006]
    6 - tire (1) according to any one of claims 1 to 5, the second elastomer mixture having a loss factor tan (82) at 60 ° C, wherein the loss factor tan 02) of the second elastomeric mixture is at less than 0.15 and not more than 0.28.
    类似技术:
    公开号 | 公开日 | 专利标题
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    FR3042738A1|2017-04-28|PNEUMATIC WORKING LAYER COMPRISING MONOFILAMENTS AND GROOVED ROLLING BELT
    EP3131763B1|2020-09-02|Tyre tread for an agricultural vehicle
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    EP3119615B1|2018-05-02|Civil engineering vehicle tyre with improved endurance
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    WO2015172998A1|2015-11-19|Tread for a tyre for a vehicle for agricultural use
    WO2018109324A1|2018-06-21|Tyre comprising a tread containing reinforcing elements
    EP3621825B1|2021-08-11|Tyre with optimised architecture and tread
    EP3713777B1|2021-10-06|Tyre for passenger vehicle
    FR3059942A3|2018-06-15|PNEUMATIC WITH A TREAD WITH REINFORCING ELEMENTS
    FR3045493A1|2017-06-23|PNEUMATIC HAVING IMPROVED WEAR AND ROLL RESISTANCE PROPERTIES
    EP3390095B1|2020-10-14|Tyre having improved wear and rolling resistance properties
    WO2020201028A1|2020-10-08|Tire for agricultural vehicle comprising an improved tread
    EP3368348A1|2018-09-05|Pneumatic tire, having working layers comprising monofilaments and a tire tread with grooves
    EP3390090A1|2018-10-24|Tire having improved wear properties
    WO2017103456A1|2017-06-22|Tyre having improved properties of wear and rolling resistance
    EP3390092A1|2018-10-24|Tyre having improved wear properties
    EP3083285A1|2016-10-26|Tyre tread for heavy vehicle of construction plant type
    同族专利:
    公开号 | 公开日
    RU2016127516A|2018-01-25|
    WO2015091731A1|2015-06-25|
    RU2675680C1|2018-12-21|
    CN105829133A|2016-08-03|
    US20170008344A1|2017-01-12|
    BR112016014461B1|2020-12-01|
    FR3015362B1|2017-05-19|
    EP3083281B1|2019-08-07|
    BR112016014461A2|2018-05-15|
    EP3083281A1|2016-10-26|
    CN105829133B|2018-07-17|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP0538723A1|1991-10-21|1993-04-28|The Goodyear Tire & Rubber Company|Tire with dual cap tread|
    EP1398182A2|2002-09-13|2004-03-17|The Goodyear Tire & Rubber Company|tire with a multi-layered tread|
    EP1897703A1|2006-09-08|2008-03-12|The Goodyear Tire & Rubber Company|Tire with tread having a transition layer containing depolymerized rubber, pre-cured rubber or coal dust|
    FR2952855A1|2009-11-26|2011-05-27|Michelin Soc Tech|TIRE FOR EQUIPPING A VEHICLE CARRYING HEAVY LOADS|
    DE19731525A1|1997-07-23|1998-07-09|Continental Ag|All year round commercial vehicle tyre eliminating tyre changes between summer and winter|
    JPH11165502A|1997-12-05|1999-06-22|Bridgestone Corp|Pneumatic tire for heavy load|
    DE19946446A1|1999-09-28|2001-04-05|Pirelli Reifenwerke|Motor vehicle tires, for use in winter and summer, comprises tread consisting of base part made of rubber mixture, suitable for summer use, and cap part made of rubber mixture suitable for winter use|
    JP4118662B2|2002-12-02|2008-07-16|住友ゴム工業株式会社|Tire for agricultural machinery|
    US20090255613A1|2008-04-09|2009-10-15|Ping Zhang|Tire with tread having an intermediate rubber layer containing a microsphere dispersion|
    US20130340906A1|2012-06-26|2013-12-26|Bradley J. Harris|D speed agriculture tires|WO2017116382A1|2015-12-28|2017-07-06|Compagnie Generale Des Etablissements Michelin|Off-road heavy truck tire|
    USD810665S1|2016-01-29|2018-02-20|Bridgestone Corporation|Tire tread|
    USD818938S1|2016-08-03|2018-05-29|Compagnie Generale Des Etablissements Michelin|Tire tread|
    USD807811S1|2016-08-30|2018-01-16|Shandong Linglong Tyre Co., Ltd.|Tire|
    USD807281S1|2016-09-07|2018-01-09|Bridgestone Americas Tire Operations, Llc|Tire tread|
    FR3080328B1|2018-04-20|2020-06-05|Compagnie Generale Des Etablissements Michelin|AGRICULTURAL VEHICLE TIRE TRACK STRUCTURE|
    法律状态:
    2015-12-21| PLFP| Fee payment|Year of fee payment: 3 |
    2016-12-22| PLFP| Fee payment|Year of fee payment: 4 |
    2017-12-21| PLFP| Fee payment|Year of fee payment: 5 |
    2019-09-27| ST| Notification of lapse|Effective date: 20190906 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1363134A|FR3015362B1|2013-12-20|2013-12-20|TIRE TREAD FOR A VEHICLE FOR AGRICULTURAL USE|FR1363134A| FR3015362B1|2013-12-20|2013-12-20|TIRE TREAD FOR A VEHICLE FOR AGRICULTURAL USE|
    US15/106,807| US20170008344A1|2013-12-20|2014-12-18|Tire Tread For A Farm Vehicle|
    CN201480068563.2A| CN105829133B|2013-12-20|2014-12-18|Tire tread for agricultural vehicle|
    BR112016014461-9A| BR112016014461B1|2013-12-20|2014-12-18|pneumatic tread for agricultural vehicle|
    PCT/EP2014/078366| WO2015091731A1|2013-12-20|2014-12-18|Tyre tread for a farm vehicle|
    RU2016127516A| RU2675680C1|2013-12-20|2014-12-18|Tyre tread for farm vehicle|
    EP14814870.3A| EP3083281B1|2013-12-20|2014-12-18|Tyre tread for a farm vehicle|
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