Entries |
Document | Title | Date |
20080210355 | Pneumatic tire - A tire has a tread and a pair of opposing shoulders. In the first sidewall, a series of extension blocks creates a pair of concentric rings. In the second sidewall, a different configuration of extension blocks may be present. The second sidewall has alternating extension blocks where one of the blocks has a portion that is located radially inward of the other block. | 09-04-2008 |
20080257466 | Pneumatic Tire - There is provided a method of tire manufacturing a tire in which preset-beads each preformed by mounting a bead filler on a bead core are disposed radially outward of a carcass band and both side portions of the carcass band are turned around the preset beads to build the tire. The method eliminates a need to hold the considerable intermediate stocks and does not deteriorate the tire uniformity due to the unevenness of the preset bead in the circumference direction. There are also provided an apparatus of forming a preset bead used therefor and a system of forming a preset bead. In the method of manufacturing a tire in which preset-beads each preformed by mounting a bead filler on a bead core are disposed radially outward of a carcass band and both side portions of the carcass band are turned around the preset beads to build the tire, the preset bead is formed by winding and laminating a ribbon-shaped filler rubber | 10-23-2008 |
20090000712 | Pneumatic Tire - A pneumatic tire | 01-01-2009 |
20090032157 | TIRE FOR CONSTRUCTION VEHICLE - An object of the present invention is to provide a tire for a construction vehicle which suppresses a trouble of the tire by enhancing a heat-radiation characteristic of a tire center portion. | 02-05-2009 |
20090044889 | Heavy duty pneumatic tire - It aims to provide a heavy duty pneumatic tire with block patterns and capable of improving deflected wear resisting performances without sacrificing wet grip performances or on-snow performances and that can particularly be favorably used for all seasons. The present invention comprises block patterns employing at least three types of blocks | 02-19-2009 |
20090044890 | Heavy duty pneumatic tire - It aims to provide a heavy duty pneumatic tire with block patterns and capable of improving deflected wear resisting performances without sacrificing wet grip performances or on-snow performances and that can particularly be favorably used for all seasons. The present invention comprises block patterns employing at least three types of blocks | 02-19-2009 |
20090090444 | TRUCK TIRE - A pneumatic tire for use on trucks, the tire comprising: a tread, the tread having a non-skid depth (NSK), the tread including a first and second shoulder rib and two or more inner ribs, and circumferential grooves interposed between the ribs. The tread pattern is asymmetric, wherein the first shoulder rib has a rib width ratio in the range of about 1.2 to about 1.8, and the second shoulder rib has a rib width ratio in the range of about 1.0-1.6. | 04-09-2009 |
20090095391 | PNEUMATIC RADIAL TIRE - Provided is an ultra-low profile pneumatic radial tire for SUV or the like having an aspect ration of 55% or less and a tire outer diameter of 720 mm or more, which has improved load durability while managing a weight reduction without deteriorating driveability. A carcass layer ( | 04-16-2009 |
20090107599 | Off-road tire tread having strake and chamfer structure - A pneumatic tire ( | 04-30-2009 |
20090126840 | Motor vehicle tire having tread pattern - A tyre for a motor vehicle includes a tread and two shoulders. The tread includes a circumferential row of blocks disposed between first and second circumferential grooves, wherein each of the blocks is delimited by a section of the first circumferential groove and by first and second transverse grooves that extend from the first circumferential groove and terminate at a common vertex spaced from the second circumferential groove. The first and second transverse grooves of the circumferential row of blocks are oriented in a first direction along a longitudinal direction of the tread, wherein the common vertex is separated from the second circumferential groove by a continuous circumferential tread rib. The second transverse groove delimits a first one of the blocks and is separated from the first transverse groove that delimits a circumferentially adjacent block by a solid tread portion. At least one of the first and second transverse grooves may include an increasing width in a direction from the common vertex toward the first circumferential groove. The tyre may define an equatorial plane, and the circumferential row of blocks may be disposed co-extensive with the equatorial plane. The common vertex of each block may be located at a position axially intermediate the second circumferential groove and a portion of one of the transverse grooves that delimits the block. | 05-21-2009 |
20090151832 | PNEUMATIC TIRE - Provided is a pneumatic tire in which left- and right-side lateral grooves extend between first main grooves and second main grooves, and in which left- and right-side sub grooves extend halfway from the second main grooves toward the first main grooves. The lateral grooves and the sub grooves are disposed alternately with each other at predetermined pitches in tire circumferential directions. The left- and right-side lateral grooves respectively include: first groove portions extending from the first main grooves; and second groove portions extending from the second main grooves while curving inwardly toward tire width directions. The left- and right-side lateral grooves are offset from each other in the tire circumferential directions. Opening portions at both ends of each of the lateral grooves, which are opened to the first main grooves and the second main grooves, are shifted from one another in the tire circumferential directions. | 06-18-2009 |
20090188595 | PNEUMATIC TIRE - Provided is a pneumatic tire having improved driving stability and wear resistance on dry road surfaces as well as an improved running performance on snow. The present invention provides a pneumatic tire designed to be mounted on a vehicle so that a designated side of the tire should face to the outside of the vehicle. The pneumatic tire includes a tread portion provided with: a first main groove extending in a tire circumferential direction; a second main groove extending in the tire circumferential direction in a shoulder region closer to the center of the vehicle than the first main groove; a third main groove extending in the tire circumferential direction in a shoulder region farther from the center of the vehicle than the first main groove; and a plurality of lug grooves each extending from one shoulder side to the other shoulder side. Moreover, in the pneumatic tire, a width of a first land section defined between the first and second main grooves is set greater than a width of a second land section defined between the first and third main grooves, a plurality of inclined grooves are provided in the first land section, each inclined groove communicating with at least three of the lug grooves while being inclined to the tire circumferential direction, and one end of each inclined groove is opened to one of the lug grooves while the other end thereof is terminated within a block. | 07-30-2009 |
20090188596 | PNEUMATIC TIRE - Lateral grooves | 07-30-2009 |
20090199943 | On/Off-Road Tire For A Motor Vehicle - A tire having a tread wherein a first shoulder region includes a plurality of shoulder blocks that are circumferentially separated by shoulder transverse grooves. A central region includes a plurality of substantially transverse grooves extending from a first circumferential groove toward the equatorial plane, wherein two circumferentially consecutive substantially transverse grooves delimit a central area. The central area includes a first central block; a second central block having one side forming a part of the wall of the first circumferential groove; and a third central block circumferentially shifted with respect to the first central block and positioned at a distance from the first circumferential groove, the third central block being separated from the second central block by a central transverse groove which is inclined with respect to the equatorial plane. The substantially transverse grooves have respective end portions at a distance from the equatorial plane. | 08-13-2009 |
20090255614 | PNEUMATIC TIRE - A pneumatic tire has a tread pattern which comprises at least three circumferential grooves with a groove width of 6 to 18 mm and a groove depth of 6.0 to 16.0 mm extending in a tire circumferential direction, wherein, on groove walls on both sides forming the at least three circumferential grooves, first inclined walls inclined by an inclination angle of 5 to 20 degrees with respect to the tire circumferential direction and second inclined walls inclined by an inclination angle of 0 to 45 degrees with respect to a tire width direction are provided so as to be successively connected in the tire circumferential direction so that positions of groove ends in the tire width direction vary in the tire circumferential direction. | 10-15-2009 |
20090266457 | PNEUMATIC TIRE - Provided is a pneumatic tire which achieves both reduction of pattern noise and improvement in driving stability on a dry road surface. The pneumatic tire according to the present invention is designed to be mounted in such a way that a designated side of the tire faces to the outside of a vehicle, and is characterized in that: multiple block elements arrayed in a circumferential direction of the tire are formed in each of regions sectioned by an equator of the tire in a tread portion of the tire, the regions on inner and outer sides; the number of pitches of the block elements on the vehicle inner side is set to 60 to 80; the number of pitch variations of the block elements on the vehicle inner side is set to at least 4; the number of pitches of block elements on the vehicle outer side is set to 50 to 70; the number of pitch variations of the block elements on the vehicle outer side is set to at least 4; the number of pitches of the block elements on the vehicle inner side is set larger than the number of pitches of the block elements on the vehicle outer side; and a ratio of an average pitch length of the block elements on the vehicle outer side to an average pitch length of the block elements on the vehicle inner side is set in a range of 1.05 to 1.20. | 10-29-2009 |
20090320981 | PNEUMATIC TIRE - A pneumatic tire is provided for enhancing its driving stability and braking performance on particular road surfaces. The pneumatic tire is provided with five main grooves, first and second lateral grooves, and first and second blocks. The five main grooves include a single first main groove, two second main grooves, and two third main grooves. The single first main groove is disposed on a tire equator. The first main groove is made of a see-through groove extending in the tire circumferential direction. The two second main grooves are disposed on two sides of the first main groove in the tire width direction. The first and the second lateral grooves are extending in the tire width direction. The first and the second blocks are formed in a center area of the tread surface between the two third main grooves. A sub-groove is disposed in each first block. | 12-31-2009 |
20100000641 | PNEUMATIC TIRE, TIRE MOLD, AND METHOD OF MANUFACTURING PNEUMATIC TIRE - A pneumatic tire includes a tread that has: land portions formed and segmented by a plurality of circumferential grooves extending in a tire circumferential direction and by a plurality of widthwise grooves extending in a tire width direction; and sipes formed in contact patches of the land portions. The pneumatic tire includes: recessed sections (groove-bottom recessed sections) that are formed in tire-width-direction lateral surfaces of the land portions provided in tire-width-direction outermost parts, so as to connect to the widthwise grooves; and indents/lugs that are formed in bottom surfaces of the recessed sections such that indents/lugs thereof are arranged alternately and continuously in a linear manner. | 01-07-2010 |
20100132864 | Tyre for vehicle wheels having improved tread pattern - A tyre for vehicle wheels having a tread pattern includes: a) two circumferential grooves, which define a first and a second shoulder region, and one central region; b) a plurality of asymmetric transverse grooves having a substantially “V” shape, which extend for the whole width of the tread, including an alternate sequence of a first and a second asymmetric transverse groove defining an alternate sequence of a first and a second asymmetric module; and c) a plurality of lateral transverse grooves, which includes one first lateral transverse groove extending for the whole width of the first shoulder region and for a portion of the central region of the first asymmetric modules, and one second lateral transverse groove extending for the whole width of the second shoulder region and for a portion of the central region of the second asymmetric modules. | 06-03-2010 |
20100170599 | Asymmetric pattern tread for ATV tire - A tire for All Terrain Vehicles includes the first ribs located within a central area of the tread, which are non-continuously arranged, and the second ribs which are next to the ATV. The first ribs are separated by first gaps and the second ribs are separated by second gaps, the first and second gaps are located alternatively to each other. | 07-08-2010 |
20100243117 | PNEUMATIC TIRE - Provided is a pneumatic tire in which the performance change of driving stability due to continuous driving can be suppressed even with a carcass layer, which has a single-ply structure and a wound-up section extended up to a region below a belt layer so as to overlap with an end section of the belt layer. In the pneumatic tire of the present invention, a single-ply structured carcass layer having a cord angle in a range of 75° to 90° to a tire circumferential direction is laid between a pair of bead sections, a belt layer is arranged on an outer peripheral side of the carcass layer in a tread section, bead cores around each of which the carcass layer is wound up from an inner side to an outer side of a tire are arranged respectively in the bead sections, bead fillers are arranged respectively on the bead cores and are each sandwiched by a body section and a wound-up section of the carcass layer, and each wound-up section of the carcass layer is extended up to a region below the belt layer so as to overlap with an end section of the belt layer, wherein a height of the bead filler from a bead heel is not more than 25 mm, a sectional area of the bead filler is not more than 65 mm | 09-30-2010 |
20100252157 | PNEUMATIC RADIAL TIRE - A pneumatic radial tire includes a pair of annular bead portions | 10-07-2010 |
20100263775 | PNEUMATIC TIRE - A pneumatic tire is provided including a multiplicity of land portions | 10-21-2010 |
20100294408 | Pneumatic Tire Having an Asymmetric Tread Profile - A tire having (i) an asymmetric tread profile with a shoulder drop difference of 0.3 to 0.9; and (ii) an asymmetric tread pattern so as to have a ratio between the inner void/solid ratio and the outer void/solid ratio of 1.1 to 1.50. By the above combination of features, handling and aquaplaning performance is remarkably improved even at high operating speeds without negatively affecting the wear resistance of the tread band. | 11-25-2010 |
20110061780 | PNEUMATIC TIRE - The pneumatic tire includes a tread pattern having a land portion sandwiched between tire circumferential grooves. A groove area ratio of the tread pattern is different between areas on opposite sides with reference to a tire center line in a tire width direction. A first side has the larger groove area ratio and a second side has the smaller groove area ratio respectively. The land portion is protruding outward in a tire radial direction and the land portion has edge portions bordering the tire circumferential grooves and formed by groove walls of the tire circumferential grooves sandwiching the land portion and a surface of the land portion. A drop length of the edge portion facing to the first side from a most protruding point of the land portion along the tire radial direction is longer than a drop length of the edge portion facing to the second side. | 03-17-2011 |
20110067793 | PNEUMATIC TIRE - Provided is a pneumatic tire capable of improving the drainage performance while favorably maintaining the uneven wear resistance. The pneumatic tire of the present invention is a pneumatic tire having a tread portion provided with at least three main grooves extending in a tire circumferential direction, these main grooves defining a plurality of land portions, the pneumatic tire characterized in that, when specified are a pair of the land portions positioned respectively at both sides of any one of the main grooves excluding the main grooves on outermost sides in a tire width direction, a plurality of first inclined grooves inclined to the tire circumferential direction are provided in one land portion of the pair of the land portions, and a plurality of second inclined grooves inclined in a same direction as that of the first inclined grooves are provided in the other land portion of the pair of the land portions, each of the first inclined grooves is opened at one end to the main groove positioned between the pair of the land portions, and is terminated at the other end in the one land portion, and each of the second inclined grooves is opened at one end to the main groove positioned between the pair of the land portions, and is terminated at the other end in the other land portion. | 03-24-2011 |
20110247738 | MOTORCYCLE TYRE - Motorcycle tyre suitable for mounting on the rear wheel of a motorcycle, including a tread band having a tread pattern includes a module which is repeated in a direction of circumferential extension of the tyre, the module having: at least two substantially longitudinal first grooves which are inclined opposite to each other with respect to the equatorial plane of the tyre; and at least two substantially longitudinal second grooves which are inclined opposite to each other with respect to the equatorial plane. Each substantially longitudinal first groove alternates with a second longitudinal groove. The substantially longitudinal first grooves have, in a direction axially away from the equatorial plane of the tyre, two substantially consecutive curvilinear sections, the first section of which has a convexity and the second section of which has a concavity directed in the rolling direction of the tyre. The first curvilinear section defines along its extension with the equatorial plane angles smaller than or equal to 90°. | 10-13-2011 |
20110297284 | PNEUMATIC TYRE - A motor car tyre having a tread includes a central portion situated on either side of an equatorial plane and two shoulder portions. The central portion is separated from the shoulder portions of the tread by two circumferential grooves and has at least one circumferential rib situated between a first and a second circumferential groove. The tread has a solid/void ratio of less than 0.28. The circumferential rib includes transverse grooves which extend over at least 50% of its width. The transverse grooves include at least one curvilinear section, have a width less than that of the circumferential grooves and at least one of the circumferential grooves including the circumferential rib has at least one side wall defining an undulating profile. | 12-08-2011 |
20110308679 | PNEUMATIC TIRE - A pneumatic tire, wherein the central narrow groove includes an arc, the inner diameter side of the arc is facing towards the tire ground contact edge side, one end is open to another adjacent central narrow groove and the other end is open to the circumferential main groove on the inner side area side. A first central sipe is disposed between adjacent central narrow grooves, and connects the central narrow groove and the circumferential main groove on the inner side area side. One end of the notch portion is open to the circumferential main groove on the outer side area side, and the other end terminates within the central land portion. A second central sipe is disposed between adjacent notch portions. One end of the second central sipe is connected to the circumferential main groove on the outer side area side and another end terminates within the central land portion. | 12-22-2011 |
20120006455 | PNEUMATIC TIRE FOR CONSTRUCTION VEHICLE - An object of the present invention is to provide a pneumatic tire for a construction vehicle capable of suppressing deterioration in heat release property while maintaining high wear resistance especially when used as driving wheels. | 01-12-2012 |
20120018067 | MOTORCYCLE TIRE FOR RUNNING ON ROUGH TERRAIN - A motorcycle tire for running on rough terrain comprises a tread portion having a developed tread width and provided with a plurality of tread blocks. The tread blocks include a plurality of crown blocks defined as having a ground contacting top surface whose centroid is located within a crown region defined as having a developed width of ⅓ of the developed tread width and centered on the tire equator. The crown blocks include a plurality of central crown blocks whose axial distance from the tire equatorial plane to the centroid is not more than 2% of the developed tread width, and a plurality of off-center crown blocks whose axial distance from the tire equatorial plane to the centroid is more than 2% and not more than 6% of the developed tread width. | 01-26-2012 |
20120037287 | HEAVY DUTY PNEUMATIC TIRE - A heavy duty pneumatic tire comprises a tread portion provided with a circumferentially continuously extending longitudinal groove disposed on each side of the tire equator, and oblique grooves extending axially inwardly from the longitudinal groove at an inclination angle of 20 to 40 degrees with respect to the tire axial direction. The longitudinal groove is provided with a sound insulation wall disposed therein so as to rise from the groove bottom. The sound insulation wall extends continuously in the circumferential direction in a zigzag manner so as to have axially inner points and axially outer points at turning points of the zigzag. The distance between the sound insulation wall and the axially inner edge of the longitudinal groove is varied periodically in the tire circumferential direction so that the distance becomes minimal at the junctions of the longitudinal groove with the axially inner oblique grooves. | 02-16-2012 |
20120060987 | PNEUMATIC TIRE - A pneumatic tire wherein a side from a tire ground contact center line having a smaller groove area ratio includes at least one circumferential main groove and at least one circumferential narrow groove. A depth of the circumferential narrow groove is not less than 60% and not more than 80% of a depth of the circumferential main groove closest to the tire ground contact center line. A width of the circumferential narrow groove is not less than 25% and not more than 40% of a width of the circumferential main groove closest to the tire ground contact center line. A distance from the tire ground contact center line to a center position in the tire width direction of the circumferential narrow groove is not less than 25% and not more than 35% of a tire ground contact width. | 03-15-2012 |
20120060988 | MOTORCYCLE TIRE - A motorcycle tire has a unidirectional tread pattern having an intended rotational direction. The tread portion is provided on each side of the tire equator with main oblique grooves, each comprising a main portion extending from the tire equator toward a tread edge while inclining toward the direction opposite to the intended rotational direction. The main portion includes a part overlapping the tire equator which part has an inclination angle of not more than 20 degrees with respect to the tire equator. The main portion has such a dimension that the circumferential ends thereof are positioned outside a ground contacting area of the tire in its normally inflated loaded state at the camber angle of 0 degree. The land ratio of a tread center region between the ground contact edges is in a rage of from 75 to 95%. | 03-15-2012 |
20120111465 | MOTOR VEHICLE TYRE - Motor vehicle tyre adapted to be mounted on the rear wheel of a motor vehicle, includes a tread band having a tread pattern including a module which is repeated along a direction of circumferential extension of the tyre. The module has at least one first pair of first grooves inclined in opposite directions with respect to an equatorial plane of the tyre, and extending from the equatorial plane toward a respective shoulder; at least one second pair of second grooves inclined in opposite directions with respect to the equatorial plane and extending from the equatorial plane toward a respective shoulder. The first and the second grooves are staggered relative to each other in the circumferential direction in such a way as to maintain a substantially constant distance of less than half the pitch, at the equatorial plane between each first or second groove and the adjacent one in the circumferential direction. | 05-10-2012 |
20120118454 | PNEUMATIC TIRE - A pneumatic tire improved in on-ice performance and on-snow performance in good balance. The pneumatic tire includes a tread portion extending in a tire circumferential direction and forming a ring shape, a pair of sidewall portions on both sides of the tread portion, respectively, and a pair of bead portions on inner sides of the sidewall portions in a tire radial direction, respectively. The tread portion includes a plurality of longitudinal grooves extending in the tire circumferential direction and a plurality of lateral grooves extending in a tire width direction. The longitudinal and lateral grooves define a plurality of block rows each including a plurality of blocks. Each of the plurality of blocks included in at least one of the block rows includes at least three closed grooves including at least one first closed groove and at least one second closed groove. | 05-17-2012 |
20120118455 | PNEUMATIC TIRE - To make it possible to enhance uneven wear resistance while maintaining drainage performance, a pneumatic tire includes a left-right asymmetric tread pattern having a designated mounting orientation with respect to a vehicle. Vertical grooves include an inner shoulder circumferential groove disposed on an innermost side of the vehicle, and an outer shoulder circumferential groove disposed on an outermost side of the vehicle. Lateral grooves include inner shoulder lateral grooves and outer shoulder lateral grooves. The inner shoulder lateral groove includes a first inner shoulder lateral groove which extends inward in a tire axial direction from an outer side of a vehicle-inner side tread edge and terminates without reaching the inner shoulder circumferential groove, and a second inner shoulder lateral groove which extends inward in the tire axial direction from an outer side of the vehicle-inner side tread edge and opens in the inner shoulder circumferential groove. | 05-17-2012 |
20120118456 | PAIR OF MOTOR VEHICLE TYRES - A pair of motor vehicle tyres includes a front tyre and a rear tyre to be mounted respectively on a front wheel and a rear wheel of a two-wheeled vehicle, each tyre of the pair having a tread band extending around an axis of rotation. The tread band of the front tyre includes a central annular portion straddling an equatorial plane and two annular shoulder portions disposed on axially opposite sides of the central annular portion. The central annular portion includes at least a pair of first grooves extending substantially longitudinally on opposite sides of the equatorial plane in such a way as to form a concavity directed toward the equatorial plane. Each shoulder portion includes a plurality of second grooves isolated from the first grooves and extending substantially transversally so as to form an average inclination with the equatorial plane greater than 90°. The tread band of the rear tyre includes instead a module which is replicated along a direction of circumferential development of the tyre, the module including: at least one first pair of first grooves inclined in opposite directions with respect to the equatorial plane of the tyre; each first groove of the first pair extending along a portion of the tread band between the equatorial plane and a respective shoulder and forming an average inclination less than 60° with the equatorial plane. | 05-17-2012 |
20120132333 | PNEUMATIC TIRE - A pneumatic tire includes a plurality of circumferential grooves and a first land portion. The circumferential grooves extend continuously in a tire circumferential direction. The first land portion extends in the tire circumferential direction between a pattern end and one of the circumferential grooves in a shoulder region located outside the circumferential grooves in a tire width direction. The first land portion has first lug grooves extending from the pattern end in the tire width direction and closed without communicating with the circumferential grooves are arranged in the tire circumferential direction. At least one circumferential groove is wave-shaped with a constant groove width in the tire width direction at a tread surface and formed in a wave shape in the circumferential direction at the tread surface and groove bottom. The wave-shaped circumferential groove has a shorter cycle length of waves at the groove bottom than at the tread surface. | 05-31-2012 |
20120132334 | PNEUMATIC TIRE - A pneumatic tire is provided with an asymmetric tread pattern which comprises an inboard shoulder longitudinal groove ( | 05-31-2012 |
20120175031 | PNEUMATIC TIRE - A pneumatic tire with good fuel efficiency, drainage performance and uneven wear resistance is provided. A pneumatic tire has a tread surface provided with circumferential main grooves to define a center region and two side regions. The center region is provided with a first circumferential narrow groove and second circumferential narrow grooves located between the first circumferential narrow groove and the circumferential main grooves; and center rib-like land portions including first center rib-like land portions defined by the first circumferential narrow groove and the second circumferential narrow grooves, and second center rib-like land portions defined by the second circumferential narrow grooves and the circumferential main grooves. The center rib-like land portions located next to each other with the center circumferential narrow grooves being therebetween are adapted to supportingly contact with each other. The second circumferential narrow groove has a width larger than that of the first circumferential narrow groove. | 07-12-2012 |
20120241060 | PNEUMATIC TIRE FOR MOTORCYCLE - Provided is a pneumatic tire for motorcycle in which the abrasion resistance and the steering stability of the tire at the time when the motorcycle is travelling while leaning sideways are combined by resolving the above-mentioned problems and improving the tread pattern. | 09-27-2012 |
20120261044 | PNEUMATIC TIRE - A pneumatic tire has an asymmetrical tread pattern. An outboard central main circumferential groove extends zigzag and is made up of alternate minor and major groove segments. The major groove segments incline at an angle of from 5 to 30 degrees with respect to the tire circumferential direction. An inboard central main circumferential groove is widest in main circumferential grooves. Outboard middle axial grooves are widest in axial grooves. The distance Li of the widthwise center line of the straight inboard central main circumferential groove from the tire equator is less than the distance Lo of the amplitude center line of the zigzag outboard central main circumferential groove from the tire equator. | 10-18-2012 |
20120273103 | PNEUMATIC TIRE - A pneumatic tire including at least four circumferential main grooves extending in the tire circumferential direction and a plurality of rib-like land portions partitioned by the circumferential main grooves in the tread portion. An outer side second land portion includes an L-shaped narrow groove formed by connecting a width direction groove portion extending from an edge portion on an outer side in the tire width direction of the outer side second land portion toward an inner side in the tire width direction, and a circumferential direction groove portion extending substantially parallel to the tire circumferential direction and terminating in an interior portion of the outer side second land portion; and a penetrating sipe penetrating the outer side second land portion in the tire width direction and intersecting the circumferential direction groove portion. | 11-01-2012 |
20120279623 | OFF-ROAD TIRE TREAD HAVING STRAKE AND CHAMFER STRUCTURE - Embodiments are directed to a pneumatic off-road tire having an inner shoulder, an outer shoulder and a tread therebetween. The tread has a central axis and includes a plurality of generally curved first grooves. Each first groove has a first end disposed near the outer shoulder and a second end disposed near the inner shoulder so that each first groove crosses the central axis. The first end is spaced circumferentially from the second end. A plurality of second grooves, each connecting the second end of a first groove to a first end of another first groove, are included. The first and second grooves define a cascading repetition of tread blocks. Chamfers are defined on certain corners of the tread blocks that are adjacent to the first grooves and that expose a tread block wall following the chamfer, relative to a rotation of the tire, to an off-road contact surface. | 11-08-2012 |
20120285591 | PNEUMATIC TIRE - A pneumatic tire has a good balance between on-ice and on-snow performances. The tire includes a tread portion having longitudinal and lateral grooves defining block rows. Each block in the block rows includes sipes. A length of each block in the first and second block rows is not less than 1.5 times and not more than 2.5 times a length of each third block row block. A width of each second block row block is larger than a width of each first block row block. The lateral grooves defining the first and second block row blocks are offset in the tire circumferential direction by not less than 0.2 times and not more than 0.8 times the length of each first block row block. The lateral grooves defining the second and third block row blocks communicate with each other while inclining in the same direction. | 11-15-2012 |
20120285592 | PNEUMATIC TIRE - A pneumatic tire for improving steering stability performance on dry and wet road surfaces. The tire tread pattern has circumferential center main grooves, outside and inside main grooves, land sections demarcated by the main grooves, ground contact borders on both sides of the tire, and closed shoulder lug grooves. A ratio Wmax/Wout of a maximum main groove width Wmax and an outside main groove width Wout is at between 1.5 and 2.5 inclusive. A ratio Sin/Sout of a groove area ratio Sin of a region on a tire-widthwise second side of a tire centerline and a groove area ratio Sout of a region on a first side of the tire centerline is at least 1.10 and smaller than 1.25. A groove area ratio of a region on the second side of a tire-widthwise centerline of the intermediate land sections exceeds that of a region on the first side. | 11-15-2012 |
20120285593 | MOTORCYCLE TYRE AND PAIR OF MOTORCYCLE TYRES - A motorcycle tyre has a tread band including a central portion and two shoulder portions arranged at axially opposite sides of the central portion. The central portion includes a first plurality of grooves extended according to a substantially longitudinal direction and alternatively arranged at opposite sides of the equatorial plane of the tyre. Each groove of the first plurality of grooves has a substantially curvilinear course such as to form a concavity. The central portion further includes a sub-portion substantially free of grooves placed astride the equatorial plane of the tyre. Each of the shoulder portions includes a second plurality of grooves arranged obliquely relative to the equatorial plane of the tyre. | 11-15-2012 |
20120312437 | MOTORCYCLE TIRE - A tread portion of a motorcycle is on each side of the tire equator with main oblique grooves. The main oblique groove has an axially inner end at a axial distance from the tire equator, extends axially outwardly beyond the side edge of the narrow width ply of the breaker, terminates within the tread portion, and comprises an axially inner oblique segment extending axially outwardly from the axially inner end, while inclining to a tire circumferential direction at a smaller angle with respect to the tire circumferential direction, and an axially outer oblique segment extending from the axially inner oblique segment, while inclining to the tire circumferential direction at a larger angle with respect to the tire circumferential direction to form a bent point. The developed axial distance from the bent point to the narrow width ply side edge is not more than 10% of the developed tread width. | 12-13-2012 |
20120312438 | PNEUMATIC TIRE - A center rib is formed by two circumferential main grooves. A main inclined groove and an auxiliary inclined groove are formed in the center rib. The main inclined groove is inclined with respect to the tire circumferential direction to become distanced from the tire equatorial plane from a leading side toward a trailing side in a tire rotational direction, a plurality of the main inclined grooves being juxtaposed in the tire circumferential direction and disposed alternately in the tire circumferential direction on both sides of the tire equatorial plane. The auxiliary inclined groove inclines with respect to the tire circumferential direction to become distanced from the tire equatorial plane from the leading side toward the trailing side in the tire rotational direction, a leading end and a trailing end terminating within the center rib while intersecting at least two of the main inclined grooves. | 12-13-2012 |
20120318419 | PNEUMATIC TIRE - Plural lug grooves are formed that extend from an outermost circumferential direction groove towards a tire equatorial plane side and are disposed sloped with respect to the tire equatorial plane at intervals along the tire circumferential direction. Arc shaped communication grooves are formed in segment land portions arising from a land portion being segmented in the tire circumferential direction by the lug grooves. The communication grooves communicate between the lug grooves adjacent to each other in the tire circumferential direction. | 12-20-2012 |
20120325384 | PNEUMATIC TIRE - A pneumatic tire includes two circumferential main grooves within a ground-contact width of a tread, and a group of polygonal blocks between the two circumferential main grooves. The group of polygonal blocks includes a plurality of polygonal blocks arranged in at least two longitudinal rows in a tire circumferential direction and a plurality of transverse rows in a tire width direction. Each polygonal block has not less than five sides, and is defined by narrow grooves. The polygonal blocks in the adjacent longitudinal rows are arranged so as to be staggered from each other in the tire circumferential direction. The group of polygonal blocks has a widthwise center that is positioned within a 50% width region of the ground-contact width of the tread across a tire equatorial plane. | 12-27-2012 |
20120325385 | PNEUMATIC TIRE - Provided is a pneumatic tire in which a polygonal block group is provided between two circumferential main grooves in a tread ground contact width, the polygonal block group comprising a plurality of polygonal blocks with five or more sides which are demarcated by thin grooves and arranged in at least two longitudinal rows and a plurality of lateral rows, the longitudinal rows being arranged so that the polygonal blocks included in adjacent longitudinal rows differ in phase from each other in a tire circumferential direction; side block rows are provided, one on each of the two sides in the tire width direction of the polygonal block group, the side block rows comprising a plurality of side blocks which are demarcated by the circumferential main grooves, lateral grooves, and the thin grooves and arranged in the tire circumferential direction; and a length in the tire circumferential direction of a first side block included in a first side block row provided on one side is larger than the length in the tire circumferential direction of a second side block included in a second side block row provided on the other side. | 12-27-2012 |
20130037190 | PNEUMATIC TIRE - A pneumatic tire including a tread portion, side wall portions, and bead portions, wherein the tread portion includes a plurality of circumferential grooves having a groove width of not less than 3.0 mm and which extend in a tire circumferential direction while meandering, and a plurality of lateral grooves having a groove width of not less than 3.0 mm and which communicate between a pair of circumferential grooves adjacent in a tire width direction. The circumferential grooves and the lateral grooves partition two rows of polygonal blocks formed by arranging a plurality of polygonal blocks, having a polygonal shape with not less than five corners, in a staggered manner along the tire circumferential direction. A polygonal rib extending in the tire circumferential direction is disposed between the two rows of polygonal blocks. The polygonal rib is adjacent to the two rows of polygonal blocks. | 02-14-2013 |
20130075001 | PNEUMATIC TIRE - Sipe groups including a plurality of sipes which is opened to a main groove and is arranged at intervals in a tire circumferential direction are formed in both land parts with the main groove being interposed therebetween. The sipe groups are arranged at intervals in the tire circumferential direction, and are shifted in the tire circumferential direction on both sides of the main groove. | 03-28-2013 |
20130087260 | PNEUMATIC TIRE - A pneumatic tire includes a tread portion including a plurality of land portions separated by at least two longitudinal grooves, a plurality of lateral grooves crossing the longitudinal groove to form a block row, at least one block having at least two sipes extending in an axial direction of the tire to divide at least three block-pieces which include an outer piece and an inner piece relatively arranged in circumferentially inner side of the block than the outer piece, wherein the total axial length of whole sipes is in a range of from 100 to 400 times a tread width, the outer piece of the block has a circumferential length larger than that of the inner piece of the block, and a ratio of the circumferential length of the outer piece to the circumferential length of the inner piece is greater than 1.0 and smaller than 3.0. | 04-11-2013 |
20130087261 | PNEUMATIC TIRE - A pneumatic tire has an asymmetric tread pattern and an outboard tread edge and an inboard tread edge to be located outside and inside of a vehicle respectively. Inboard shoulder blocks have an axial width and outboard shoulder blocks have an axial width more than the axial width of the inboard shoulder blocks. The inboard and outboard shoulder blocks are each provided with a plurality of sipes. The sipes of each outboard shoulder block include a circumferential sipe as the axially outermost sipe. The circumferential sipe extends at an angle of not more than 10 degrees with respect to the tire circumferential direction. The outboard shoulder block has an axially outer sidewall of which surface is provided with a plurality of narrow buttress grooves extending radially inwardly from the outboard tread edge. | 04-11-2013 |
20130098517 | WET AND SNOW TRACTION DESIGN FOR A TIRE TREAD - A novel design for a high-speed tire tread is provided that gives improved performance in both water and snow conditions. The tread region of the tire uses transversely-oriented grooves that each extend in a novel manner across the width of the tread region. There are no grooves or other tread features that provide substantial fluid communication between the transversely-oriented grooves. | 04-25-2013 |
20130112325 | PNEUMATIC TIRE - A pneumatic tire has an asymmetric tread pattern. The width of an outboard shoulder main groove ( | 05-09-2013 |
20130118661 | RUN-FLAT TIRE - A run-flat tire comprises a tread portion having a left-right asymmetry tread pattern including an inboard tread edge and an outboard tread edge defining a tread width therebetween, a circumferentially extending inner crown main groove disposed in an inner crown area being 20% width of the tread width from a tire equator toward the in-board tread edge, a plurality of inner lateral grooves extending from the inner crown main groove to the in-board tread edge, a plurality of inner blocks separated by the inner crown main groove, inner lateral grooves and the inboard tread edge, wherein each inner block is not provided with any circumferential grooves, or is provided with at least one narrow circumferential groove having a groove width of less than 2.0 mm. | 05-16-2013 |
20130118662 | Pneumatic Tire - A pneumatic tire includes circumferential main grooves extending in a tire circumferential direction and land portions partitioned and formed by the circumferential main grooves. The land portion of a center region and the land portions of left and right shoulder regions each have a plurality of sipes. Not less than 90% of the sipes disposed in the center region are constituted by two-dimensional sipes and not less than 90% of the sipes disposed in the shoulder regions are constituted by three-dimensional sipes. The left and right shoulder land portions each have a plurality of lug grooves arranged in the tire circumferential direction. A pitch number N_ce of the lug grooves in the land portion of the center region and a pitch number N_sh of the lug grooves in the land portions and of the left and right shoulder regions have a relationship such that N_ce>N_sh. | 05-16-2013 |
20130133797 | PNEUMATIC TIRE - A pneumatic tire comprises a tread portion with a left-right asymmetry tread pattern including inboard and outboard tread edges, a pair of inboard and outboard center main grooves to form a center portion therebetween, a pair of inboard and outboard shoulder main grooves to form a pair of middle portions and a pair of shoulder portions, inboard lateral main grooves extending from the inboard tread edge beyond the tire equator without reaching the outboard center main groove, inboard shoulder lateral grooves between adjacent inboard lateral main grooves, outboard shoulder lateral grooves extending from the axially outside of the outboard tread edge without reaching the outboard shoulder main groove, inboard middle lateral grooves between adjacent inboard lateral main grooves and extending from the inboard shoulder main groove without reaching the inboard center main groove, outboard middle lateral grooves and outboard middle sub lateral grooves. | 05-30-2013 |
20130167994 | PNEUMATIC TIRE - A tread portion | 07-04-2013 |
20130180638 | HEAVY DUTY PNEUMATIC TIRE - Heavy duty pneumatic tire with a tread portion having a zigzag crown main groove and a pair of zigzag shoulder main grooves forming two crown land portions between the crown main groove and two shoulder main grooves. The crown land portion is divided by crown lateral grooves into circumferentially arranged crown blocks. The crown lateral grooves in each crown land portion extend from alternate axially inside zigzag vertices of the shoulder main groove to zigzag vertices of the crown main groove, while inclining with respect to the tire circumferential direction. The crown block has a crown auxiliary groove narrower in width than the crown main groove and extending to one of the zigzag vertices of the crown main groove to which none of the crown lateral grooves are connected, from one of the inside zigzag vertices of the shoulder main groove, while inclining with respect to the tire axial direction. | 07-18-2013 |
20130186532 | PNEUMATIC TIRE - A pneumatic tire with a designated installing direction to a vehicle, includes a tread portion with an inboard and an outboard tread edges, the tread portion provided with a pair of inboard and outboard center main grooves and a pair of inboard and outboard shoulder main grooves to form a center portion, a pair of middle portions, and a pair of shoulder portions, each of the inboard center main groove, the outboard center main groove and the inboard shoulder main groove having a groove width of from 10 to 20 mm, the outboard shoulder main groove having a groove width of from 2 to 5 mm, the outboard shoulder portion provided with outboard shoulder lateral grooves each extending from the outboard tread edge without reaching the outboard shoulder main groove, and the outboard middle portion provided with outboard middle lateral grooves. | 07-25-2013 |
20130192731 | PNEUMATIC TIRE - A tread portion of a pneumatic ti re includes inner land portions between outer circumferential main grooves disposed most on tread ground-contact end sides and at least one inner circumferential main groove on the inner side thereof. The inner land portions are divided into inner blocks by inner lateral grooves inclined at an angle α of 10 to 40°. The inner lateral grooves consist of first inner lateral grooves and second inner lateral grooves which are alternately arranged in a circumferential direction. The first inner lateral grooves include a wide-width part connecting to the outer circumferential main groove and a narrow-width part connecting to the inner circumferential main groove. | 08-01-2013 |
20130192732 | TIRE - An inclined groove ( | 08-01-2013 |
20130199682 | MOTORCYCLE TIRE - A motorcycle tire improved in transient characteristics when leaned is disclosed, wherein the tread portion has a unidirectional tread pattern comprising: inside oblique main grooves disposed on each side of the tire equator staggeredly, inclined to the axially outside toward the intended rotational direction (R) at an angle of 5 to 30 degrees with respect to the circumferential direction, and each having an inner end (Ai) at a distance of 0 to 30% of the half tread width (W) from the tire equator; and outside oblique main grooves 11 disposed on each side of the tire equator staggeredly, inclined to the axially outside toward the counter-rotational direction at an angle of 10 to 60 degrees with respect to the circumferential direction, and each having an inner end (Bi) axially inside the outer end (Ao). | 08-08-2013 |
20130199683 | MOTORCYCLE TIRE - A motorcycle tire includes a tread portion having a first region and a second region divided by the tire equator, with the tread portion being provided with first inner inclined grooves provided in the first region and second inner inclined grooves provided in the second region, first and second inner inclined grooves alternately arranged in a tire circumferential direction, the inner inclined groove extending from an axially inner end Ai toward an anti-designated rolling direction to an axially outer end Ao at an angle α of 0-20 to the tire circumferential direction, and first outer inclined grooves provided in the first region and second outer inclined grooves provided in the second region, and first and second outer inclined grooves alternately arranged in the tire circumferential direction, the outer inclined groove extending from an axially inner end Bi toward a designated rolling direction to an axially outer end Bo. | 08-08-2013 |
20130206295 | TIRE TREAD - The invention relates to an asymmetric tread for a tire comprising a plurality of basic patterns, for each of which there is defined a sipes density corresponding to | 08-15-2013 |
20130213540 | HIGH PERFORMANCE RAIN TYRE - A high performance rain tyre includes a tread band, having an inner portion and an outer portion as well as a central zone. There are formed in the tread band: two circumferential grooves in the inner portion, a central circumferential groove and a plurality of inner transverse grooves and a plurality of outer transverse grooves, wherein the inner transverse grooves include a central inner section which defines an angle with respect to the equatorial plane of between approximately −95° and approximately −135° and the outer transverse grooves include a central outer section which defines an angle, relative to the equatorial plane, of between approximately +125° and approximately +165°. | 08-22-2013 |
20130228256 | MOTORCYCLE TIRE - A motorcycle tire comprises a tread portion provided with a plurality of inner inclined grooves and inclined narrow grooves in both sides of a tire equator, wherein each inner inclined groove extends from an axially inner end to the outer end with an angle of 0-20 degrees with respect to a tire circumferential direction, the inner end of the inner inclined groove is located in a developed length within 5% of a tread half developed-width from the tire equator, each inner inclined groove has a circumferential length of 70-85% of a first pitch, each inclined narrow groove with a groove width of 0.5-2.0 mm is provided between circumferentially adjacent inner inclined grooves and has an angle with respect to a circumferential direction of the tire larger than that of the inner inclined groove. | 09-05-2013 |
20130240099 | MOTORCYCLE TIRE - A motorcycle tire comprises a tread portion provided with first T-grooves and second T-grooves arranged and oriented alternately along the tire equator. The angles of the main portion and branch portion of the T-groove, with respect to the tire circumferential direction, are gradually increased toward the tread edges. The axial distances of the branching point and an inside end of the main portion are not more than 25% of the axial distance of the tread edge, each measured from the tire equator along the tread surface. The circumferential distance from the inside end of the main portion to the circumferentially adjacent T-groove is 5 to 15% of the circumferential pitch length of the first T-grooves. | 09-19-2013 |
20130276946 | Irrigation Tire - A non directional pneumatic tire is provided for an agricultural irrigation system. The tire includes first and second side walls and a radially outer wall defining an internal inflation chamber. A non directional tread pattern is defined on the tire and includes a plurality of longitudinal protrusions positioned substantially parallel to a rotational axis of the tire. The longitudinal protrusions are arranged in first and second rows extending from the first and second side walls toward and across the equatorial plane of the tire. The longitudinal protrusions of the first and second rows circumferentially alternate with each other and there is a circumferential spacing between adjacent longitudinal protrusions at the equatorial plane so that no portion of one longitudinal protrusion circumferentially coincides with or overlaps another. | 10-24-2013 |
20130292018 | PNEUMATIC TIRE - To enhance uneven wear resistance with achieving higher levels of dry grip performance and wet performance, a tread surface | 11-07-2013 |
20130299053 | TREAD FOR A TIRE - An asymmetric tread for a snow tire comprising a rubber composition, comprising a tread surface intended to be in contact with the ground when the tire is running, and comprising a sequence of basic patterns arranged in the circumferential direction, each extending over at least 80% of the width (W) of the tread, each comprising a plurality of raised elements provided with sipes opening onto the tread surface, each sipe having a width of less than 1 mm and a depth of at least 3 mm. For each basic pattern, a sipes orientation level (NO) is defined that corresponds to | 11-14-2013 |
20130312887 | PNEUMATIC TIRE - The present invention relates to a pneumatic tire that achieves both dry performance and on-snow performance. A pneumatic tire is provided with a central land portion including the tire equator plane, intermediate land portions, and outer land portions. The central land portion is defined as a rib by a pair of central circumferential grooves and is provided with central sipes extending linearly in the tire width direction. Each intermediate land portion is divided into blocks by intermediate inclined grooves that extend obliquely with respect to the tire circumferential direction and provide communication between one of the central circumferential grooves and an outer circumferential groove, and each intermediate land portion is provided with intermediate sipes inclined at an angle of 0° to 30° with respect to the tire width direction. Each outer land portion is divided into blocks by outer inclined grooves that extend obliquely with respect to the tire circumferential direction and provide communication between an outer circumferential groove and a tread end, and each outer land portion is provided with outer sipes extending along the outer inclined grooves. | 11-28-2013 |
20130312888 | TIRE | 11-28-2013 |
20130340905 | HEAVY TRUCK TIRE FOR A TRAILER VEHICLE - A tire having a carcass reinforcement surmounted radially by a crown reinforcement having at least two working plies, the width Lt of which is equal to the width of the axially narrowest working ply, and surmounted radially by a tread (or “cap”) and interposed radially between the cap and the crown reinforcement by a sublayer (or “base”), this base extending axially and radially under all of the cap and radially on the outside of the crown reinforcement over a total width at least equal to the width Lt of the crown reinforcement, an equatorial plane dividing the cap axially into an outer half cap (TE) and an inner half cap (TI) of the same axial width, the outer half cap (TE) positioned axially towards the outside of a vehicle and the inner half cap (TI) positioned axially towards the inside of the vehicle, the base comprising an additional volume radially under the inner half cap (TI), such that the volume occupied by the base radially under the inner half cap (TI) is greater than the volume occupied by the base radially under the outer half cap (TE), and the material of the base is a rubber-based composition having hysteresis lower than the hysteresis of the rubber-based material of the cap. | 12-26-2013 |
20140014244 | PNEUMATIC TIRE - A pneumatic tire has a tread portion provided with a center land portion defined between two crown main grooves | 01-16-2014 |
20140060716 | AUTOMATICALLY TRAVELING FLOOR DUST COLLECTING APPLIANCE, AND RUNNING WHEEL, IN PARTICULAR FOR A FLOOR DUST COLLECTING APPLIANCE - An automatically traveling floor dust collecting appliance has at least one running wheel having an axis of rotation, a hub, and a tire forming a tire contact area merging radially inwardly into two oppositely situated side faces. The tire, which includes elastic material, has profile blocks, each forming a part of the tire contact area and provided one after the other in the peripheral direction. A running wheel is also provided, in particular for a floor dust collecting appliance. The part of the tire contact area formed by a profile block has a profile which in its cross-section slopes downwardly toward the center. This profile block at the same time forms a part of an associated side face. The profile block, at this transition, radially and in the direction of the axis of rotation, forms a farthest protruding portion of the tire contact area of the tire. | 03-06-2014 |
20140090759 | PNEUMATIC TIRE - A pneumatic tire comprises a tread portion divided by three circumferentially continuously extending main grooves into two crown land portions and two shoulder land portions. The axial width W | 04-03-2014 |
20140090760 | HIGH-PERFORMANCE TYRE FOR A MOTOR VEHICLE - A tyre for a motor vehicle, in particular a high-performance, tyre is provided with a tread having an overall width. The tread includes first and second circumferential grooves which separate a central region from first and second shoulder regions. The tread includes a circumferential cut in the first shoulder region at a distance from the first circumferential groove; and a plurality of circumferentially repeated transverse groove modules. A first shoulder portion of each transverse groove module includes at least one main transverse groove which includes a first substantially rectilinear portion inclined by a first angle with respect to a radial plane, a second substantially rectilinear portion inclined by a second angle with respect to the radial plane and arranged between the circumferential cut and the first circumferential groove, and a first curve portion connecting the first and the second substantially rectilinear portions. | 04-03-2014 |
20140102608 | MOTORCYCLE TIRE - A motorcycle tire has a unidirectional tread pattern formed by a circumferentially extending center main groove, and main oblique grooves each with a branch groove. The main oblique groove has an axially inner end inside a zero-camber ground contacting width and an axially outer end outside the zero-camber ground contacting width. The axially outer end is positioned in a range between 0% and 20% of the developed half tread width from the tread edge. The branch groove is composed of a first inclined part extending from the main oblique groove at an angle θ with respect to the tire circumferential direction, and a second inclined part extending at an angle δ less than the angle θ. When the developed half tread width is axially equally divided into five portions, the land ratio of each of the five portions is 75% to 85%. | 04-17-2014 |
20140130949 | PNEUMATIC TIRE - A pneumatic tire has a unidirectional tread pattern. The land ratio of an imaginary crown region | 05-15-2014 |
20140137998 | PNEUMATIC TIRE - A pneumatic tire comprises an asymmetric tread pattern with a designated install direction to a vehicle having an outboard tread edges, the tread pattern having an outboard tread portion between the outboard tread edge and a tire equator and provided with an outer main groove, the outer main groove having a cross section comprising a bottom with a depth of 5.5 to 6.5 mm, and axially inner and outer groove walls each extending from the bottom to a tread contact surface, respectively, at least one of groove walls having a stepwise shape comprising a radially inner portion extending from the bottom with a height of 2.0 to 4.0 mm, an axially extending stepped portion extending from the radially inner portion with a length of 0.75 to 1.25 mm, and a radially outer portion between the stepped portion and the tread contact surface. | 05-22-2014 |
20140137999 | PNEUMATIC TIRE - A pneumatic tire is provided in a tread portion with a center land portion which is defined between center main grooves and whose top surface has a certain area and a maximum axial width of 15% to 19% of a tread width. The center land portion is provided with axial sipes and recesses. The recess extends from the center main groove toward the tire equator, and has a depth of 60% to 80% of the depth of the center main groove. The total area of the recesses is 5% to 9% of the area of the above-mentioned top surface. The center land portion is formed as a substantially continuous rib. | 05-22-2014 |
20140138000 | PNEUMATIC TIRE - A pneumatic tire comprises a tread portion provided with a central main groove, an outboard shoulder main groove and an inboard shoulder main groove extending continuously in the tire circumferential direction. The central main groove and the inboard shoulder main groove are each connected to grooves and/or sipes. The outboard shoulder main groove is widest and not connected to any grooves (inclusive of a sipe or a very narrow groove). On both sides of the outboard shoulder main groove, there are formed sloping surfaces extending from the respective groove edges and merging into the tread surface. The width of each sloping surface is more than the depth thereof. | 05-22-2014 |
20140150941 | TIRE - First inclined grooves ( | 06-05-2014 |
20140158260 | MOTORCYCLE TIRE - A motorcycle tire is provided with crown main oblique grooves disposed on alternating sides of the tire equator and each extending from its axially inner end to its axially outer end, without cutting across the tire equator, while inclining to one circumferential direction, wherein the axially outer end is located outside an upstanding tire's ground contact annular zone. When measured in the annular zone, the circumferential distance between the circumferentially adjacent crown main oblique grooves existing on the same side of the tire equator is in a range of not more than 0.5 times an upstanding tire's ground contact length. In the annular zone, the crown main oblique grooves on one side of the tire equator is partially overlaps those on the other side. When measured in the annular zone, the circumferential length of the crown main oblique groove is less than the upstanding tire's ground contact length. | 06-12-2014 |
20140158261 | PNEUMATIC TIRE - A pneumatic tire includes a tread portion provided with three to five circumferentially extending main grooves and a plurality of lateral grooves, to form a plurality of block rows each of which includes a plurality of tread blocks. Each tread block includes a ground contact surface with a polygonal shape that has at least five sides and each interior angle of not less than 90 degrees. Each ground contact surface of the tread block includes a maximum axial width W | 06-12-2014 |
20140182757 | TYRE FOR MOTORCYCLES - A tyre for motorcycles, having a tread band includes a central annular portion, two lateral annular portions and two shoulder annular portions. The axial extension of these portions is not greater than 25%, 35%, and 20% of the axial development of the tread band, respectively. The tread band includes a module repeated along the circumference of the tyre in which at least two substantially longitudinal grooves, mainly extending in the lateral annular portions, include, moving axially away from the equatorial plane of the tyre, at least three substantially straight and substantially consecutive segments, wherein the first segment forms an angle with respect to the equatorial plane greater than 150°; and the second segment has a length measured along its extension smaller than the length of the first segment. | 07-03-2014 |
20140190606 | PNEUMATIC TIRE - A pneumatic tire includes a tread portion with an asymmetric pattern including an outboard shoulder main groove, an inboard shoulder main groove, an outboard shoulder portion between the outboard shoulder main groove and an outboard tread edge, a middle portion between the outboard shoulder main groove and the inboard shoulder main groove, and an inboard shoulder portion between the inboard shoulder main groove and an inboard tread edge, wherein the outboard shoulder portion is provided with a three dimensional sipe that has a pair of sipe surfaces extending to a depth direction of the sipe while changing its direction or opening configuration, and the inboard shoulder portion or the middle portion is provided with a two dimensional sipe that has a pair of sipe surfaces extending to a depth direction of the sipe while maintaining its direction and opening configuration. | 07-10-2014 |
20140202606 | AGRICULTURAL MACHINE TIRE - It is an object to reduce tire vibration during high-speed travel on paved roads without lowering traction performance in fields. An agricultural machine tire includes: lug blocks disposed in a tread portion and formed alternately on both sides of a tire equatorial plane in a tire circumferential direction; and a central rib extending in the tire circumferential direction and to which end portions of the lug blocks on the tire equatorial plane side are integrally connected, and when a tire width length of the central rib from connecting portions to the tire equatorial plane is taken as a first rib width and a tire width length of the central rib from end edges of the central rib from the connecting portions across the tire equatorial plane to the tire equatorial plane is a second rib width, the width of the first rib is greater than the second rib. | 07-24-2014 |
20140230978 | TYRE FOR MOTORCYCLES - Tyre for motorcycles, having a tread band includes a central annular portion symmetrically located astride an equatorial plane and two shoulder annular portions located on axially opposite sides with respect to the central annular portion. The tread band has a void-to-rubber ratio not greater than 25%. The central annular portion has an axial extension not greater than 65% of the axial development of the tread band and the central portion has at least one module circumferentially repeated. Each shoulder portion has an axial extension not greater than 40% of the axial development of the tread band and the module includes at least one pair of first grooves with substantially circumferential course, at least partially located on opposite sides with respect to the equatorial plane. The central annular portion has a void-to-rubber ratio not smaller than 10% and the module includes a plurality of second grooves located substantially transversally with respect to the equatorial plane. The substantially transverse second grooves define in each module together with said first grooves at least two tread band solid portions. The second grooves have at least one end spaced away from the adjacent first groove by a distance so as to form a substantially continuous tread portion adapted to connect at least two tread band solid portions. | 08-21-2014 |
20140238564 | PNEUMATIC TIRE - A pneumatic tire includes a tread portion provided with a pair of shoulder main grooves adjacent to each tread edge, and shoulder lateral grooves extending from each shoulder main grooves to each tread edge. Each shoulder lateral groove includes an axially inner portion extending from the shoulder main groove with a first angle, an axially middle portion extending from the axially inner portion with a second angle larger than the first angle, and an axially outer portion extending from the axially middle portion with a third angle smaller than the second angle. The shoulder lateral grooves include first and second shoulder lateral grooves alternately arranged in a circumferential direction of the tire. The axially middle portion of the first shoulder lateral groove is disposed axially inwardly of the axially middle portion of the second shoulder lateral groove. | 08-28-2014 |
20140238565 | PNEUMATIC TIRE - A pneumatic tire is provided in the tread portion with major oblique grooves disposed staggeredly on both sides of the tread pattern's center line, and plural minor oblique grooves disposed between the circumferentially adjacent major oblique grooves. The major and minor oblique grooves extend toward the counter-tire-rotational direction while increasing the angle with respect to the circumferential direction. When the axial width between the tread pattern's center line and a tread edge is evenly partitioned into 1st to 5th zones in this order from the center line, the angle θ of the major oblique groove satisfies: θ1<θ2=<θ3=<θ4=<θ5 and θ5−θ1=50 to 110 degrees, wherein θ1 to θ5 are mean values of the angle θ in the 1st to 5th zones. Each major oblique groove is provided in the 1st or 2nd zone with a bent point at which the angle θ changes at least 30 degrees. | 08-28-2014 |
20140238566 | PNEUMATIC TIRE - A pneumatic tire includes a tread having at least one main groove and a plurality of ribs extending in the tire-circumferential direction. At least one of the ribs has a plurality of narrow grooves formed at intervals in the tire-circumferential direction. At least one intermittent sipe is formed corresponding to at least one of the narrow grooves. The narrow grooves are grooves each having a portion extending substantially along the tire-circumferential direction and having a groove width smaller than the at least one main groove. The at least one intermittent sipe has a plurality of holes that are intermittently formed, and at least one solid part located between adjacent two of the holes. The holes and the solid part are arranged in a direction intersecting the narrow grooves. The intermittent sipe intersects the corresponding narrow groove in the at least one solid part. | 08-28-2014 |
20140299242 | TREAD PATTERN FOR TIRES FOR A CIVIL ENGINEERING VEHICLE - Tyre which is provided with a carcass reinforcement which is surmounted radially at the outer side by an upper reinforcement, this upper reinforcement being formed by a stack of a plurality of reinforcement sheets, these reinforcements forming with the circumferential direction angles which are not equal to zero, this tyre comprising a tread ( | 10-09-2014 |
20140305559 | PNEUMATIC TIRE - A pneumatic tire has a tread portion provided with an asymmetrical tread pattern and comprising an inboard shoulder land portion, an inboard shoulder main groove, an inboard middle land portion, an inboard crown main groove, a center land portion, an outboard crown main groove, an outboard middle land portion, an outboard shoulder main groove, and an outboard shoulder land portion. The inboard middle land portion is provided with inboard middle axial grooves extending from the inboard shoulder main groove and each comprising a main portion and a turnback portion. The inboard shoulder land portion is provided with inboard shoulder sipes extending from the inboard shoulder main groove. | 10-16-2014 |
20140311638 | PNEUMATIC TIRE - A pneumatic tire includes a tread portion with an unsymmetrical tread pattern that includes a circumferentially extending first main groove at a nearest side of an inboard tread edge, a circumferentially extending second main groove adjacent to the first main groove, and a middle land portion arranged therebetween. The middle land portion is provided with a plurality of inclined grooves, a plurality of inboard middle lateral grooves including one end communicated with the first main groove and the other end communicated with the inclined groove, and a plurality of outboard middle lateral grooves including one end communicated with the second main groove and the other end communicated with the inclined groove. Respective groove center points of the inboard middle lateral grooves are arranged in different places in the circumferential direction of the tire from respective groove center points of the outboard middle lateral grooves. | 10-23-2014 |
20140326379 | HEAVY DUTY TIRE - A heavy duty tire includes a tread portion provided with a pair of circumferential main grooves including at least one zigzag groove, lateral grooves extending between the main grooves to form center blocks therebetween, and lug grooves. Each lug groove includes an axially inner portion connecting to the zigzag groove while curving toward a first circumferential direction of the tire. The lug groove has a first groove edge disposed on a side of the first circumferential direction and a second groove edge facing against the first groove edge. The first groove edge is connected to an axially outer groove edge of the zigzag groove. The second groove edge is connected to an axially inner groove edge of the zigzag groove. The lug groove includes a constant groove width, and a groove-bottom width smoothly decreasing axially inward from the tread edge. | 11-06-2014 |
20140352861 | LOW-WEAR TYRE TREAD BAND - A tyre tread band having a centre, two shoulders on either side of the centre, and two edges on either side of the shoulders and forming a transition with the sidewalls. The profile of the tread band has at least a first arc forming part of the centre, two second arcs forming part of the shoulders, and two third arcs forming part of the edges; and, at one junction, each second arc is connected discontinuously to the first arc by a step, wherein the second arc is not tangent to, and is radially lower than, the first arc. | 12-04-2014 |
20150007917 | PNEUMATIC TIRE - A pneumatic tire is provided with a center land portion between two zigzag crown main grooves, and two middle land portions between two zigzag shoulder main grooves and the two crown main grooves. Each center block is provided with center sipes between which a central part defining the maximum width of the center block is formed. The middle land portion is divided into middle blocks by alternate, oppositely inclined first middle axial grooves and second middle axial grooves. Each middle block is provided with nonparallel middle sipes. | 01-08-2015 |
20150020937 | PNEUMATIC TIRE - An outer side rib | 01-22-2015 |
20150020938 | PNEUMATIC RADIAL TIRE - Provided is a pneumatic radial tire which is configured so that circumferential main grooves to be provided on a tread surface are suitably defined in shape. | 01-22-2015 |
20150059940 | Pneumatic Tire - A pneumatic tire has a plurality of circumferential main grooves extending in the tire circumferential direction, a plurality of lug grooves extending in the tire width direction, and a plurality of blocks partitioned by the circumferential main grooves and the lug grooves. Also, the block has a bent groove having a bent shape that is convex in one direction and that extends in the tire circumferential direction dividing the block into two in the tire width direction. Also, the blocks that are adjacent to each other in the tire circumferential direction are disposed such that the bend directions of the bent grooves are alternately reversed. | 03-05-2015 |
20150360518 | PNEUMATIC TIRE AND METHOD OF PRODUCING THE SAME - Disclosed is a pneumatic tire that includes a tread having a pattern asymmetrical about the tire equatorial plane, and that may reduce cavity resonance and has good steering stability. A pneumatic tire includes a tread portion having a pair of tread halves, the tread halves extending between the tire equatorial plane and respective outer ends in the tire width direction of the tread portion, respectively, and having different negative ratios. The tread portion has short fibers fixed to at least a portion of a tire inner peripheral surface of the tread portion, and one of the tread halves with a higher negative ratio has a higher short-fiber fixation area ratio than that of the other tread half. | 12-17-2015 |
20160001603 | PNEUMATIC TIRE - A ratio between the total width (SW) and outer diameter (OD) of a pneumatic tire, which has an asymmetrical pattern formed by grooves formed on a tread part, satisfies SW/OD≦0.3. Given a ground contact width (CW) in a ground contact region in the tread part, a groove area ratio (GR), and a groove area ratio (GRi) of a tire inner side region (Ai), which spans from a tire equator line (CL) to the vehicle side in the ground contact region, and a groove area ratio (GRo) of a tire outer side region (Ao), which spans from the tire equator line to the opposite side of the vehicle side in the ground contact region, the ground contact region is formed to satisfy 0.75≦CW/SW≦0.9, 10≦GR≦25%, and GRi01-07-2016 | |
20160001604 | Pneumatic Tire - The present technology pertains to a pneumatic tire having an asymmetrical pattern, which is formed by grooves, formed on a tread portion. A ratio SW/OD between the total width SW and the outer diameter OD of the pneumatic tire satisfies SW/OD≦0.3. A groove area ratio in a ground contact region G in the tread portion is GR, and a range from a tire equator line CL to the vehicle side in the ground contact region is a tire inside region Ai and the groove area ratio in the tire inside region Ai is GRi, and a range from the tire equator line CL to the opposite side of the vehicle side in the ground contact region is a tire outside region Ao and the groove area ratio in the tire outside region Ao is GRo, the ground contact region satisfies 10%≦GR≦25%, GRo. | 01-07-2016 |
20160039248 | PNEUMATIC TIRE - A pneumatic tire has a tread pattern capable of improving wet performance and steering stability in a well balanced manner. An inboard middle land portion is provided with inboard middle axial grooves connecting between an inboard shoulder main groove and an inboard crown main groove and inclined at 20 to 30 degrees. An outboard middle land portion is provided with outboard middle semi-blind grooves extending axially inwardly from a outboard shoulder main groove, and outboard middle sipes extending from the axially inner ends of the outboard middle semi-blind grooves to the outboard crown main groove. The outboard middle semi-blind grooves and the outboard middle sipes are inclined at 20 to 30 degrees. A center land portion is provided with inboard crown semi-blind grooves extending from the inboard crown main groove, and outboard crown semi-blind grooves extending from the outboard crown main groove. | 02-11-2016 |
20160152084 | Pneumatic Tire | 06-02-2016 |
20160159158 | HEAVY-DUTY TIRE - A tread portion ( | 06-09-2016 |
20160167441 | TIRE FOR MOTORBIKE | 06-16-2016 |
20160167443 | PNEUMATIC TIRE | 06-16-2016 |
20160200148 | PNEUMATIC TIRE | 07-14-2016 |
20160375728 | Pneumatic Tire - A pneumatic tire with five land parts formed by four circumferential main grooves wherein middle land parts each include a first sub groove and a second sub groove that are formed independently and arranged alternately in the tire circumferential direction on two sides of the middle land part in the tire width direction, the first sub groove being formed by the lug groove having one end thereof opening to one of the circumferential main grooves and the other end terminating in the middle land part, the second sub groove being formed by the lug groove having one end thereof opening to one of the circumferential main grooves and the other end terminating in the middle land part, and the middle land part further includes a concave part on a wall on an outer side of the middle land part in the tire width direction and spaced by each sub groove. | 12-29-2016 |
20170232799 | Pneumatic Tire | 08-17-2017 |
20180022165 | TIRE | 01-25-2018 |
20220134806 | TIRE TREAD WITH MULTIPLE CIRCUMFERENTIAL ASYMMETRIES - Tire-tread constructions may incorporate multiple circumferential asymmetries. Prime-number values are used for (a) the number of pitches (where a pitch is an individual pattern that is repeated around the circumference of the tire tread); (b) the number of segments of the mold with which the overall tire tread is formed; (c) the number of variations in the lengths of pitches; or (d) the number of variations in the lengths of the segments. | 05-05-2022 |