Abstract: A tire includes a tread profile and a plurality of ribs extending across the tread profile. Each rib includes a first portion and a second portion on two sides of the center axis of the tread profile. The first portion includes a first section which has a constant height. The length of the first section is “L1”. A first shoulder is connected between the first section and the outer side of the tire by a first radius. “R1”. The second portion includes a second section which has the same constant height as the first section. The length of the second section is “L2”. A second shoulder is connected between the second section and the inner side of the tire by a second radius “R1”. A ratio of the “L1” to the “L2” is 1.1 to 1.4, and a ratio of the “R1” to “R2” is 0.5 to 0.9.

Abstract: A construction vehicle tire, in which a temperature rise at the tread portion is suppressed by enhancing the heat radiation property at the tire center portion (C). Lug grooves (22) are arranged in the tread shoulder regions (S) on both sides in the tire width direction. The tire center portion (C) is formed with narrow grooves (24) extending substantially in the tire width direction (V) and having both ends terminating within the tread. A deep equatorial groove (26) extends in the tire circumferential direction on the tire equatorial plane (CL), and has a maximum depth within the range of from 70% to 110% of the depth of the lug grooves (22), so as to efficiently cool the bottom region (26B) of the deep equatorial groove (26) at high temperature.

Abstract: An off-road tire for motorcycle comprises a tread portion provided with a plurality of blocks including an axially outmost shoulder block, a pair of sidewall portions, and a pair of bead portions, the shoulder block comprising a tread face with an axially outer edge corresponding to a tread edge and a lateral face extending from the tread edge to an radially inner edge located on the sidewall portion, the lateral face with a swelling portion swelling axially outside of the tire than a reference line which connects the tread edge and the radially inner edge, in a cross section including a tire axis, and the radial height of the radially inner edge of the lateral face from the bead base line being in a range of from 30 to 50% of the tire section height.

Abstract: An off-road tire (1) comprises a tread portion (2) provided with blocks (10, 11) forming a sea area (8) therearound. The sea area (8) is provided in the bottom (14) thereof with recesses (13), wherein the recesses (13) are arranged circumferentially of the tire and each extend axially of the tire, and the depth (d) of each of the recesses (13) is gradually increased towards its center (13a), whereby the enveloping power is improved.

Abstract: A pneumatic tire includes a circumferential tread disposed between opposing tread edges and opposing sidewalls disposed radially inward from the opposing tread edges. Each sidewall has a rectangular extension block and a triangular extension block. The rectangular extension block protrudes axially outward by a first amount. The triangular extension block protrudes axially outward by a second amount. The first amount is less than the second amount.

Abstract: A system is provided for refitting a tire system on a compact tractor which typically comes equipped with a set of industrial tires mounted on standard industrial size wheels. A set of replacement agricultural tires or turf tires is provided. The replacement tires are sized to fit on the standard industrial size wheels while having rolling circumferences substantially equal to rolling circumferences of standard agricultural tires or turf tires, respectively, for the compact tractor in question. The industrial tires are replaced with the replacement agricultural tires or turf tires without changing at least the front wheels on the compact tractor.

Abstract: The present invention is directed to a pneumatic tire having at least one component including a sulfur vulcanizable rubber composition, the rubber composition including at least one diene based rubber and at least one zinc porphyrin compound.

Abstract: A pneumatic tire includes a column of center blocks (18) partitioned, on a tread center region, by circumferential thin grooves (14) formed along a tire circumferential direction and crosswise thin grooves (15) formed along a tire width direction, and columns of shoulder blocks (19) partitioned by the circumferential thin grooves (14) and main lug grooves (16) on shoulder portions. Each of the center blocks (18) includes one or more sub-thin grooves (17), each of which has a length of 100 to 180% of a circumferential length of the center block (18).

Abstract: A pneumatic tire for use on row-crop field sprayers having lugs configured for providing improved traction, load-handling capability, and stability. The leading edge of each lug is curvilinear such that outside corners are absent. Elimination of outside corners removes stress concentration points that would otherwise degrade tire performance under the conditions of high loading and fast speed. The lugs provide a significant load-carrying capacity without sacrificing attributes such as wet and dry traction, tread cleaning and hard surface roading.

Abstract: This invention provides a tire for agricultural vehicles that employs a tread design having a flattened contact surface across the width and a plurality of curved lugs that alternately extend from each sidewall to a location nearly adjacent to the opposing side wall. Each lug curves so that a central section at the center of the tire width is located on the surface ahead on the circumference of adjoining sections of the lug that extend toward each of the opposing sidewalls. In this manner, each lug appears to have a curved “banana” shape that extends across the width of the tire contact surface in a generally axial alignment. The grooves between lugs extend generally axially across the width, as a result. They are narrowed, having a circumferential width that is between approximately 20% and 30% of the average circumferential width of a lug. This geometry places more lug surface in contact with the road for better handling and longer tread life and provides less groove space to retain mud and detritus.

Abstract: A system is provided for refitting a tire system on a compact tractor which typically comes equipped with a set of industrial tires mounted on standard industrial size wheels. A set of replacement agricultural tires or turf tires is provided. The replacement tires are sized to fit on the standard industrial size wheels while having rolling circumferences substantially equal to rolling circumferences of standard agricultural tires or turf tires, respectively, for the compact tractor in question. The industrial tires are replaced with the replacement agricultural tires or turf tires without changing at least the front wheels on the compact tractor.

Abstract: A high aspect ratio agricultural pneumatic tire has a carcass including a pair of bead portions each having a bead core and two pair of first and second carcass plies of synthetic cords oriented radially and wrapped from the inside of each bead core around to an axially outer turnup end. The first pair of plies is radially inward and adjacent the second pair of plies between the bead cores and having the turnup ends T1, T1? wrapped about the bead cores and the turnup ends T2, T2? of the second pair of plies. The turnup end of the first pair of plies extends outwardly and radially along the bead filler wherein T1, T1? are located between 60% and 80% of the radial location Y of maximum section width (SW) of the tire and T2, T2? are located between 30% and 50% of Y.

Abstract: A tire (2) according to the present invention includes a tread (4), a pair of beads (8), and a carcass (10) having a radial structure. The carcass (10) has a first ply (32) and a second ply (34). The first ply (32) has a first cord. The first cord is formed by twisting three yarns. The yarn is constituted by an aramid fiber. A fineness of the yarn is equal to or higher than 800 dtex and is equal to or lower than 1100 dtex. The second ply (34) has a second cord. The second cord is formed by twisting three yarns. The yarn is constituted by the aramid fiber. A fineness of the yarn is equal to or higher than 800 dtex and is equal to or lower than 1100 dtex.

Abstract: The invention relates to a tire for heavy vehicle of the agricultural or construction type, comprising a carcass reinforcement radially surmounted by a crown reinforcement, itself topped radially by a tread, said tread being joined to two beads by means of two sidewalls. According to the invention, the tire is such that the form ratio H/S is less than 0.75 and the ratio of the width of the tread A to the height of deflection B of the crown is greater than 17.

Abstract: This tyre (14) is of the semi-hollow type for agricultural machinery, notably for a machine comprising a roller provided with a series of tyres mounted on a horizontal tube (12). Each tyre comprises a central sleeve (26) and at least one tread portion with a dome shaped profile comprising a tread (24) connected to the sleeve (26) by two sidewalls (28, 30) so as to define a hollow annular space (32) of reduced cross section relative to the cross section of the dome shaped profile. It further comprises a plurality of peripheral grippers (34) formed to project from the tread (24) and distributed in the circumferential direction on the top of the dome shaped profile. Alternatively, the tyre may be fitted to an individual wheel.

Abstract: A farm vehicle tyre (1) having a tread (2), which has a toroidal base surface (3), and a number of lugs (5), each extending radially outwards from the base surface (3) and having a front wall (6) and a rear wall (7) with respect to a given rolling direction (8); the leading edge (11), with respect to the rolling direction (8), of the section of each lug (5) along any plane (12) perpendicular to an axis (4) of rotation of the tyre is in the form of an involute curve outward of the base surface (3).

Abstract: A motorcycle tire is provided that is capable of remarkably improving a traction characteristic and an anti-sideslip characteristic for cornering without deteriorating the mud expulsion characteristic especially on a dirt road. In embodiments, a motorcycle tire has a plurality of main blocks scattered on a tread. Sub blocks are provided between the main blocks. The sub blocks are made of rubber and have a block height H2 lower than that the height H1 of the main blocks. A part of the rubber constituting a top portion of the sub block is removed to reduce the area of a upper face of the sub block.

Abstract: A pneumatic off-the-road (OTR) tire has a plurality of central and shoulder lugs. The central lugs are arranged in a circumferentially continuous row and extend across the equatorial plane (EP). Each central lug is similar in shape and orientation relative to each circumferentially adjacent central lug. The tire is conformed having a tread package that effects a low net-to-gross ratio of less than 40% as measured around the circumference of the tire. The low net to gross tread pattern is incorporated into a relatively low aspect ratio OTR tire for construction and industrial applications.

Abstract: An agricultural wheel tire has a tire tread having first and second lateral edges defining the width of the tire tread, and two sets of lugs. Each lug of the first set extends from a center of the tread width and terminates at the first lateral edge of the tire tread. Each lug of the second set extends from the center of the tread width and terminates at the second lateral edge of the tire tread. The first and second sets of lugs extend in an alternating manner in a circumferential direction of the tire tread so that corresponding side and end surfaces of adjacent first and second lugs and corresponding surfaces of the tire tread form substantially spherical-shaped depressed portions of the tire tread.

Abstract: This invention relates to off-road tires, more specifically off-road tires for use with all-terrain vehicles, agricultural equipment, and construction equipment. A plurality of elongated pads are interposed between circumferentially adjacent lugs, preventing damage to the tire's inner tread without impeding the soil shedding characteristics of the tire's soil discharge channels. The width of the puncture prevention pads may vary to compensate for the greater spacing between circumferentially adjacent lugs at the shoulder region of the tire.

Abstract: An All Terrain Vehicle Tire (10) for the drive axle positions has a tread (12) having three circumferentially continuous channels (61 62, 63). Two of the channels (62, 63) divide the elongated lugs (40, 42) into an axially inner portion (40A, 42A) and an axially outer portion (40B, 42B). The channels (61, 62, 63) and soil discharge channels (60) between elongated lugs (40, 42) facilitate mud cleaning of the tread (12).

Abstract: A cushion tire is formed from a rubber material without being provided with an airspace inside the tire. An aspect ratio, which is a ratio of a sectional height of a tire with respect to a width of the tire, is set to 15 to 80%. And a number of holes are formed in both bilateral side surfaces of the tire along a circumferential direction thereof.

Abstract: This invention relates to a pneumatic rubber tire having a circumferential rubber tread of a lug and groove configuration which extends to a substantial portion an adjacent rubber sidewall and is designed to be ground-contacting. Said lug and groove configured portion of said sidewall is of a rubber composition comprised of a blend of cis 1,4-polyisoprene natural rubber and cis 1,4-polybutadiene rubber which contains reinforcement as carbon black, starch/plasticizer composite and aggregates of participated silica together with a coupling agent. Said circumferential rubber tread is of a rubber composition comprised of at least one diene-based rubber together with carbon black reinforcement and is exclusive of starch and precipitated silica.

Abstract: The present invention is directed a pneumatic agricultural or industrial tire comprising a casing and a rubber tread disposed radially outwardly of the casing, the tread having an inner tread and a plurality of tread lugs projecting radially from the inner tread, said casing having at least one component, said component comprising textile cord and a rubber composition in contact with the textile cord, the rubber composition comprising

Abstract: An agricultural wheel tire having on its periphery a plurality of first lugs and a plurality of second lugs provided circumferentially in an alternating manner is provided. A depressed portion formed by adjacent two first lugs and a second lug located between the first lugs has a spherical shape. A depressed portion formed by adjacent two second lugs and a first lug located between the second lugs also has a spherical shape. The soil is hardened within the spherical depressed portions, preventing the tire from sinking.

Abstract: An auxiliary groove is formed in tire circumferential direction on a tire central plane of an pneumatic tire according to the present invention. This auxiliary groove is formed, whereby a negative ratio of a center region other than the lug groove is set to 10% to 25%. Thus, a tread heat radiation quantity can be decreased, and a surface area of a tire can be increased. As a result, heat radiation properties can be improved. In addition, as long as the negative ratio is within the above set range, the wear of the tread can be reduced to the minimum. Namely, according to the present invention, there can be provided an pneumatic tire capable of both reducing the wear of the tread to the minimum and improving a heat radiation effect.

Abstract: This invention relates to off-road tires, more specifically off-road tires for use with all-terrain vehicles, agricultural equipment, and construction equipment. A plurality of elongated pads are interposed between circumferentially adjacent lugs, preventing damage to the tire's inner tread without impeding the soil shedding characteristics of the tire's soil discharge channels. The width of the puncture prevention pads may vary to compensate for the greater spacing between circumferentially adjacent lugs at the shoulder region of the tire.

Abstract: A pneumatic tire for use on row-crop field sprayers having lugs configured for providing improved traction, load-handling capability, and stability. The leading edge of each lug is curvilinear such that outside corners are absent. Elimination of outside corners removes stress concentration points that would otherwise degrade tire performance under the conditions of high loading and fast speed. The lugs provide a significant load-carrying capacity without sacrificing attributes such as wet and dry traction, tread cleaning and hard surface roading.

Abstract: A pneumatic tire having a tread pattern is provided, in which occurrence of uneven wear observed in a conventional lug-type tread pattern can be prevented without causing degradation in the various characteristics of the tire. The pneumatic tire having a tread pattern in which main lug grooves are disposed in the opposing tread shoulder regions at a predetermined pitch in the circumferential direction of the tire. The main lug grooves are so arranged as to provide circumferential phase difference between the opposing tread shoulder regions. In this construction, a narrow shallow groove is disposed in the central region of the tread portion in the tread width direction for connecting the main lug grooves located in the opposing tread shoulder regions, and a shallow groove portion is formed in the shoulder end region inside the main lug groove.

Abstract: A drive axle tire 20 for use on combines is disclosed. The tire 20 has a tread 32 with a plurality of lugs 50 extending to the equatorial centerplane wherein each lug has a lug length (ll), a lug height (lh) and a lug width (lw). The lug width (lw) is equal or greater than the lug height (lh) and the lugs 50 within each respective row are spaced apart a distance less than three times (lw). The lugs are oriented at a low angle of less than 35° relative to the axial direction, the line K is preferably about 31°.

Abstract: A pneumatic tire having a directional tread pattern of a designated rotating direction comprises at least one circumferential main groove at a central region of a tread portion, a circumferential sub-groove at each of side regions of the tread portion, a plurality of slant grooves extending in the shape of an unfolded fan and opening at the end of the tread portion, and blocks defined by these grooves, in which a central block located nearest to an equatorial plane of the tire has such a headland part that a corner part facing to the sub-groove at a leading end side in the rotation of the tire taperingly projects into a joint part between the sub-groove and the slant groove, and the headland part has a surface form that a height from a groove bottom of the joint part and a length in the circumferential direction gradually decrease toward the end of the tread portion.

Abstract: The invention relates to a pneumatic rubber tire with an outer, circumferential tread wherein said tread has a tread configuration comprised of spaced apart, raised lugs designed to be shock absorbingly ground contacting, wherein said tread and lugs are comprised of rubber selected from butyl rubber, halobutyl rubber or isobutylene-derived rubber. Said tire may also contain sidewalls comprised of one or more of such rubber. Thus, such tread is a combination of specific structural configuration and specific rubber composition to create a shock absorbing effect.

Abstract: A low pressure tire 20 for off road use has a carcass 21 reinforced with carcass plies 22 and a composite structure including a tread 32, a belt or breaker reinforcement 26 and one or more low angle cord reinforced layers 60.

Abstract: An all-terrain vehicle tire (10) operated at 4 psi (0.3 bar) or less inflation pressure has a plurality of lugs (44) arranged in a pitched pattern for noise reduction. The ratio of small (S), medium (M) and large (L) pitches are preferably arranged with a maximum pitch variation between circumferentially adjacent pitches of 1.1 to 1.

Abstract: This invention relates to off-road tires 10, more specifically, one embodiment of this invention relates to an all-terrain vehicle tire 10 having an inner tread 13 with a textured surface 15.

Abstract: An all terrain vehicle tire (10) has an annular tread (12) and a casing (11) radially inward of the tread (12). The tread (12) has a plurality of tread lugs (92, 94) and a central rib (95). The plurality of tread lugs (92, 94) are disposed on each tread half and spaced axially from the equatorial plane of the tire (10). The spacing from the equatorial plane of the tire (10) is a distance of at least 10% of the tread width. The central rib (95) is located between the plurality of tread lugs (92) on each tread half. The central rib (95) has a nonskid depth as measured from the inner tread surface of less than the maximum nonskid depth of the tread lugs (92, 94). The preferred embodiment tire (10) has a pair of inserts (42), one insert (42) being in each sidewall (18, 20) of the tire (10) and a third insert (70) disposed between a breaker reinforcing structure (36) and at least one ply reinforcing structure (38) of the casing (11).

Abstract: This invention relates to off-road tires 10, more specifically, one embodiment of this invention relates to an all-terrain vehicle tire 10 having an inner tread 13 with a textured surface 15.

Abstract: As agricultural tire 20 for the driveaxle of a vehicle has an aspect ratio of greater than 95%. The tire 20 has a nominal rim diameter of 20 inches or greater.

Abstract: The present invention relates to a tire with a colored sidewall joined with a plurality of colored grooves in its tread. In particular, the present invention relates to a tire of a black-colored rubber composition having a non-black colored sidewall portion which is integral with a plurality of non-black colored grooves of a tread of lug and groove configuration. For said tread, at least a portion of the visible surface of a plurality of tread grooves, exclusive of the outer surface portion of said carbon black reinforced rubber lugs intended to be ground-contacting, is of a non-black colored, synthetic amorphous silica reinforced rubber composition exclusive of carbon black. For said colored sidewall and plurality of connecting tread groove combination, said tread groove and sidewall may be of the same or different non-black color(s).

Abstract: A non-directional farm tire 10 has a tread 32. The tread 32 has a set 60 having three lugs 50A, 50B, 50C. The lugs 50A and 50B have substantially parallel lug centerlines 63 while the lugs 50C have centerlines 63 generally perpendicular to the centerline 63 of lugs 50A and 50B. The set 60 is repeated a plurality of times circumferentially about the tread 32. The set 60 extends along a line 62 through the lug centers 61 in a substantially straight line across the tread 32 from the first tread edge 33A to the second tread edge 33B. The centerlines 63 of each of the shoulder lugs are parallel and form an acute angle &thgr; with the equatorial plane of about 45°.

Abstract: The present invention relates to a tire having a tread of lug and groove configuration of a black-colored, carbon black reinforced rubber composition, wherein at least a portion of the visible surface of at least one of said grooves, exclusive of the outer surface portion of said carbon black reinforced rubber lugs intended to be ground-contacting, is of a non-black colored, synthetic amorphous silica reinforced rubber composition exclusive of carbon black.

Abstract: This invention relates to off-road tires, more specifically, a preferred embodiment of this invention relates to a pneumatic all-terrain vehicle tire having puncture prevention pads 72.

Abstract: A pneumatic tire having a tread pattern is provided, in which occurrence of uneven wear observed in a conventional lug-type tread pattern can be prevented without causing degradation in the various characteristics of the tire. The pneumatic tire having a tread pattern in which main lug grooves are disposed in the opposing tread shoulder regions at a predetermined pitch in the circumferential direction of the tire. The main lug grooves are so arranged as to provide circumferential phase difference between the opposing tread shoulder regions. In this construction, a narrow shallow groove is disposed in the central region of the tread portion in the tread width direction for connecting the main lug grooves located in the opposing tread shoulder regions, and a shallow groove portion is formed in the shoulder end region inside the main lug groove.

Abstract: A farm tractor has a vehicle having a pair of pneumatic agricultural tires 20 having an asymmetric directional tread 32 with lugs 50A,50B,50C arranged in a chevron type pattern 70,72. The chevron pattern 70,72 is asymmetric having the apex or point 74 lying entirely on one-half 32A or 32B of the tread 32 thus creating soil discharge channels 89,82 that are greater on one tread half 32A or 32B relative to the other tread half 32A or 32B. This tread pattern permits the employment of lugs 50A, 50B of substantially equal lug length ll insuring more uniform wear characteristics.

Abstract: This invention relates to a pneumatic rubber tire having a rubber sidewall composition of a lug and groove configuration which is designed to be ground contacting. Such sidewall configuration is of a rubber composition comprised of a blend of natural rubber and cis 1,4-polybutadiene rubber which contains carbon black and silica together with a coupling agent.

Abstract: A heavy-transport radial tire (1), the tread (2) of which has a number of circumferential main grooves (4) and, at each shoulder (3), a circumferential decoupling groove (5) defining a peripheral rib (6), which contacts the ground along a respective annular contact portion (9) and, in section, is of tapered shape defined by a taper (8) formed along an outer surface of the peripheral rib (6) and imparting a substantially truncated-cone shape to the respective shoulder (3).

Abstract: An off-road pneumatic tire 10 having a tread 12 with a plurality of lugs 14, each lug 14 having a wide section 22 near at least one shoulder of the tread and a narrow section 24 crossing a centerline of the tread. In a preferred embodiment, each lug 14 having two wide sections 22, one extending from each shoulder 16, 18 of the tread 12 and being interconnected by the narrow section 24.

Abstract: An off-road pneumatic tire 10 having a plurality of lugs 14 extending from a first shoulder 16 to a second shoulder 18. The plurality of lugs 14 are separated by a plurality of wide grooves 20. The tire 10 has at least a first lug 22 and a second lug 24. The lugs 14 alternate circumferentially between the first lug 22 and the second lug 24. The first lugs 22 has three tread elements 30, 32, 34 separated by a first and second narrow groove 26, 28, and the second lug 24 has two tread elements 36, 38 separated by a third narrow groove 40. In a preferred embodiment, the respective lugs 14 incline from the first shoulder 16 to the second shoulder 18 and are interconnected by wide groove tie bars 44.

Abstract: This invention relates to a pneumatic rubber tire having a rubber sidewall composition of a lug and groove configuration which is designed to be ground contacting. Such sidewall configuration is of a rubber composition comprised of a blend of natural rubber and cis 1,4-polybutadiene rubber which contains specified carbon black reinforcement and silica together with a coupling agent. The tire tread rubber composition differs from the rubber composition of said sidewall lug and groove configuration by being exclusive of silica and coupling agent and carbon black reinforcement exclusive of said specified carbon black.

Abstract: A pneumatic agricultural tire (20) for an industrial type tractor or like vehicle has a plurality of central lugs (60) and a plurality of shoulder lugs (40, 50). The plurality of central lugs (60) are arranged in a circumferentially continuous row and extend across the equatorial plane (EP). Each central lug (60) is similar in shape and orientation relative to each circumferentially adjacent central lug (60). Each central lug (60) has a leading edge (51) and a trailing edge (52). The leading edges (51) of each lug (60) are located on an opposite of the equatorial plane relative to the trailing edge (52) of the same central lug (60). The plurality of shoulder lugs (40, 50) are divided into first and second rows and project radially outwardly from the inner tread (34) and extend from the lateral tread edges (33A, 33H) toward the equatorial plane of the tire (20).