Abstract:
A pneumatic tire for a heavy load is provided which prevents irregular abrasion generated at the edge of land portions of the tire tread. An irregular abrasion preventing land portion is thus formed at the edge of a land portion, inside the shoulder edge of the tire, whereby the irregular abrasion generated at this portion is prevented.
Abstract:
A tire tread band for medium/heavy duty motor-vehicles having circumferential grooves confining three pairs of respectively center, intermediate and shoulder ribs. Respective tread blocks are defined along the center and intermediate ribs and they are confined by transverse cuts. The center cuts impart a cusp-shaped end conformation and a hollow-shaped end conformation to the respective blocks, and the shapes of said end portions mutually match. The intermediate cuts run in the linear extension of the center cuts to give the respective blocks a rhomboidal configuration. The tire can be alternately associated with a driving axle or a driven axle, by merely reversing its direction of rotation, so that the following results are selectively achieved: an increase in the traction capability by the intermediate blocks or an increase in the directional capability as a result of the mutual wedging between the center blocks at the ground-contacting area.
Abstract:
A tire that has a tread base compound and a tread cap compound that have synergistic properties, an extra wide center rib, stiff shoulder lugs, and lateral grooves between shoulder lugs that do not vary significantly in width has a superior combination of rolling resistance properties, traction properties, noise properties, and wear properties. Also the RSAT of the tire can be fine tuned by chamfering edges of lugs in the tire.
Abstract:
Pneumatic tire. The invention pertains to a vehicle tire for use in winter driving conditions whose tread pattern includes a circumferentially extending row in each of the shoulder regions, wherein the profile or pattern is asymmetrically shaped and includes, relative to the vehicle, an inner tread portion and an outer tread portion, with the shoulder block row of the inner tread portion being provided with sipes having good opening characteristics, with reference to the circumferential direction of the tire, and the shoulder block row of the outer tread portion is provided with sipes that assure high block rigidity during lateral force loading.
Abstract:
A radial pneumatic light truck or automobile tire 10 having a tread 12 which has a plurality of traction elements 20,30 aligned in rows and separated by wide circumferential grooves 24 and a plurality of narrow laterally inclined grooves 26,36. Each traction element 20,30 is divided into at least three zigzag portions by a plurality of wavy patterned sipes 28,38. The wavy pattern of sipes 28 within the central rows of traction elements 20 are laterally extending. The wavy pattern sipes 38 in the shoulder rows are circumferentially extending. The preferred tire 10 has the laterally extending narrow grooves 26 being wavy and along with the wavy sipes 28 of a traction element 20 having peak amplitudes (A) aligned along a linear path (L) inclined at an angle .theta., relative to the equatorial plane (EP). Axially adjacent central rows of traction elements 20 are oppositely inclined.
Abstract:
A pneumatic tire comprising a radial carcass, a belt and a tread portion is provided at its side end region of a ground contact area of the tread portion with a plurality of fine grooves, each being a groove in which each of opposed groove walls extends slantly in substantially a direction opposite to a rotating direction of the tire toward a groove bottom of the fine groove and considerably improves a straight running stability while controlling a wandering phenomenon during the running on slant road surface.
Abstract:
A studless tire with a tread pattern comprising blocks that are defined by longitudinal and transverse grooves and having at least one row of blocks that extends in the peripheral direction of the tire. The peripheral rows of blocks are such that at least one sub-block is provided within one pitch of the tread pattern outside an adjacent block in the tire's rotating axle. And the sub-block is separated from the block by a sub-groove less deep than the longitudinal and transverse grooves and has the longer side in the peripheral direction and the shorter side in the direction of the rotating axle.
Abstract:
A tire tread for pneumatic vehicle tires comprising tread blocks of a central block row separated from one another by inclined grooves which consist of two angularly extending groove sections which meet at the central circumferential plane. Furthermore, two circumferential grooves extend at an acute angle to the circumferential plane of the tire in the region of the blocks which bound them at the sides.
Abstract:
A tire with reduced tread noise includes a tread having a plurality of base pitches arranged about the circumference of the tire in at least one pitch sequence. Each base pitch in the pitch sequence has a tread geometry defined by a plurality of load-supporting tread blocks separated or interrupted by grooves and/or sipes. The base pitches in the pitch sequence have different tread geometries to reduce the noise of the tire on the road surface. The grooves and/or sipes in each base pitch have common end points along the leading and trailing edges of the base pitches such that the grooves and/or sipes are continuous across the boundary between adjacent base pitches in the pitch sequence. Likewise, the grooves and/or sipes in each base pitch in one rib or row in the tire can have common end points along the edge between a base pitch in an adjacent rib or row, such that the grooves and/or sipes are continuous in the lateral direction as well. The base pitches formed in this manner can be arranged in a particular pitch sequence regardless of: (i) the individual tread geometry of each base pitch, or (ii) the particular sequence of base pitches. Moreover, the length of the base pitches in the circumferential direction can also be varied by known manners (e.g., random, sinusoidal) to further reduce the noise of the tire on a road surface.
Abstract:
A pneumatic tire tread with at least one circumferentially extending row of high stiffness blocks and one of low stiffness blocks where the low stiffness blocks are between 4 to 10% greater height than the high stiffness blocks.