Abstract: An improved nonpneumatic tire for a motor vehicle is described. The tire has a rim and one or more elastomeric materials bonded to the rim or to one another. The tire has an equatorial plane, an annular tread rotatable about an axis, and an annular elastomeric body. The elastomeric body has at least 48 openings, a first set of at least 24 openings extend from the first side and a second set of at least 24 openings extend from a second side, both sets extending toward the equatorial plane. The openings form equally spaced columns. The columns formed by the first set of openings are inclined to the radial direction. The columns formed by the second set of openings are inclined opposite to the columns of the first set. The improved tire is characterized by columns having cross sections equidistant from the equatorial plane. The cross section of each of the columns increases in thickness from a minimum to maximums at the radially inner and radially outer extremes of the column.

Abstract: A pneumatic radial tire for a passenger car, which includes a plurality of grooves provided on the surface of a tread and extending at least in a tire circumferential direction and a belt layer having a double layer structure and provided within the tread, characterized in that the total sectional area, .alpha., of steel wires per 50 mm width of the belt layer is in a range satisfying 5.ltoreq..alpha..ltoreq.9 mm.sup.2, the depth, d, of the grooves is in a range satisfying 6.0.ltoreq.d.ltoreq.8.0 mm, and the thickness, t, of rubber under the grooves defined as the distance from the bottom of the groove to the outermost belt layer is in a range satisfying 1.0.ltoreq.t.ltoreq.2.5 mm.

Abstract: In a flame-retardant rubber tire comprising an outer rubber body portion consisting essentially of a tread rubber layer, a sidewall rubber layer extending inward from each side edge of the tread rubber layer toward the vicinity of a bead portion in radial direction and a rubber chafer layer arranged in the vicinity of the bead portion, a flame-retardant rubber composition having an oxygen index of not less than 19.8 but not more than 27.5 is disposed so as to amount at least 20% by weight of the tread rubber layer. Such rubber tires are used in electric vehicles, automobiles, airplanes and the like and have excellent self-extinguishing property and flame-delaying property without damaging other rubber properties.

Abstract: A pneumatic tire having a tread, a pair of sidewalls each terminating in an annular bead area, and a pair of beads located within the bead areas, for mounting the tire on a rim. Each of the beads is formed by at least one strand of metallic wire wound upon itself into a spiral and terminating in inner and outer ends, which ends circumferentially overlap each other. The beads are placed in the tire so that the spiral orientation of the beads are opposite to each other and the inner ends of the beads are in substantial axial alignment to reduce radial force variations on the tire.

Abstract: An improved pneumatic agricultural tire (10) having a maximum section width (SW), an equatorial plane (EP) and a rim diameter (D) of 24 (61 cm) inches or greater is described. The tire (10) is particularly well suited for use as an irrigation tire. The tire (10) comprises a casing (12) having a cord reinforced rubber coated carcass (14) and a rubber tread (40) disposed radially outwardly of the carcass. The tread (40) includes an inner tread (42) and tread lugs (44,44L). The lugs (44,44L) are of a depth of less than R1, (R1 being defined as about 1.52 inches or about 3.9 cm) preferably about 80% of the R1 depth. The lugs extend axially inward a distance of 25% to 60% of the section width from an axially outer end to an axially inner end and less than a majority of the lugs extend across the equatorial plane of the tire. The tread (40) has a net-to-gross ratio of less than 30%. The tread lugs each have a centerline located midway between leading (52) and trailing edges (54) of the lug (44,44L).

Abstract: An improved pneumatics radial drive tire 10 for agricultural use under dry and wet or moist soil conditions requiring a tire with high flotation and deep tread characteristics is described. The improvement comprises utilizing a tread 13 with a net-to-gross ratio in the range of 15 to 25% and where the tread 13 has lugs 18A, 18B that are greater than 150% of standard R1 lug and greater than 75% but less than 95% of an R2 lug. The lugs when incorporated in a 20.8 R38 radial tire are designed to support and carry for extended distances a dynamic load bearing weight of 170% of the Tire and Rim Association's recommended load on paved surfaces without lug failure.

Abstract: A directional pneumatic tire having improved wet traction has an annular aqua channel and lateral grooves which direct water from the footprint to the shoulder area of the tire to help prevent hydroplaning. The aqua channel has an extended U-shape wherein a wall of the aqua channel closer to a shoulder of the tire has a steeper incline than the side of the aqua channel closer to the center of the tire. The aqua channel may have a step between its shoulder side and its center side wherein the center side is higher by a distance d. In one illustrated embodiment, a center tread portion of the tire, bounded by an aqua channel and a center groove, and two lateral grooves, comprises a single block element.

Abstract: A pneumatic tire comprising a pair of beads, and a carcass ply consisting of a main body located axially inside the beads and outer ply portions extending along the main body of the carcass ply axially outside each of the beads. A number of circumferentially spaced recesses are provided in the outer surface of the tire between a radially outer end of each of the outer ply portions and a location corresponding to a maximum width of the tire, and the recesses has a depth equal to 1/10 time to 1/2 time as large as a thickness of those portions of the tire which are provided with the recesses. The inclined angle of a base portion of each of the beads is about 15.degree. relative to the rotary axis of the tire. In the tire, 0.4P.ltoreq.W.ltoreq.0.8P and B.ltoreq.0.

Abstract: The tire treads are divided circumferentially into first, second, and third zones. The edge between each of the three zones in the tire treads are in the center of an aquachannel. The tires have a tread groove pattern that is asymmetric in character.

Abstract: A directional pneumatic tire having improved wet traction has two annular aqua channels and curved lateral grooves which direct water from the footprint to the shoulder area of the tire to help prevent hydroplaning. The pitch boundaries between the portions of the tire on either side of the aqua channels may be skewed. The curved lateral grooves and the skewing reduce noise properties of the tire. In addition, the lugs may have rounded or radiused leading and trailing edges, and a leading groove wall angle of about 5.degree. and a trailing groove wall angle of about 1.degree., which are believed to reduce noise and irregular wear. The lugs contain slots which change direction within the lug and tie bars in the slots at each point where the slots change direction. The tread has non-skid depth of 0.75 to 1 cm (0.030 to 0.40 inch) and a ratio of non-skid to tie bar depth of 0.42.

Abstract: A pneumatic tire manufactured with a sector mold including of plural arc-shaped segments each having plural island rows of ribs or blocks in its tread portion and sipes formed in at least one island row. Among these sipes, a depth of a sipe located in the vicinity of a position of a tread surface corresponding to an edge of the arc-shaped segment is made shallower than that of a sipe located at a position other than the above position.

Abstract: A pneumatic tire comprising a tread, wherein at least one circumferential groove having a width not greater than 0.1 times as much as that of the tread is formed in at least one end portion of the tread, thereby forming at least one narrow rib having a width not more than 0.2 times as much as that of the tread, and at least one of the above at least one narrow rib is projected radially outwardly from an extension line of a contour line of the tread by 0.3 times of a gauge of the tread at the maximum.

Abstract: A pneumatic tire having an outer surface of a tread portion divided into a tread pattern by grooves, in which each of the grooves has an intersect portion and an angle of an island portion surrounded by said intersect portion is different from that of another part at the same island portion. In such a tire, running performances on dry road are improved by making a distance in radial direction from an outer surface of the tread portion to a bottom of the groove at the intersect portion larger as the angle becomes smaller.

Abstract: In order to optimize the behavior of a conventional passenger car on snow-covered and icy ground, the driving axle of said vehicle is equipped with tires the treads (1) of which are provided with elements in relief (11) having incisions (14) of a width other than zero, the traces of which are transverse while the load-bearing axle of the same vehicle is equipped with tires of the same structure but with treads (2, 3) provided with elements in relief or blocks (21, 31) having incisions (24, 34) of a width other than zero, the traces of which are elliptical.

Abstract: Tread for heavy vehicles with radial carcass comprising a plurality of cimferential rows of blocks (13) having incisions (15), defined by circumferential (10) and transverse (12) grooves, said blocks being connected to each other in circumferential direction by platforms 14) which are arranged in the transverse grooves (12) and the height of which increases from the center towards the edges of the tread, the depth of the incisions (15) decreasing from the center towards the edge of the tread and the density of the incisions being maximum in the central zone (Z) of the tread.

Abstract: In order to improve the compromise between the properties of adherence to ow-covered or icy ground and its wear properties, the tread of a tire which is provided with incisions having a width other than zero and, seen in cross section, fork-shaped traces with two branches, has grooves the walls of which are provided with an incision which forms with the trace of the groove a trace which is symmetrical to the trace of the incision which is parallel to and closest to said groove.

Abstract: A tire with reduced tire noise includes a tread having a plurality of base pitches placed about the circumference of the tire in at least one circumferential section. According to one aspect of the invention, the base pitches have three different pitch lengths which form a pitch sequence around the circumference of the tire in each circumferential section. The base pitches are arranged such that the transitions between the base pitches with the smallest pitch lengths to the base pitches with the largest pitch lengths are between about 15% and 30% of the total number of transitions between base pitches of different lengths in the pitch sequence. Additionally, the smallest and largest base pitches each comprise between about 35% and 40% of the total number of base pitches around the circumference of the tire. The above factors, when coupled with no more than three consecutive base pitches having the same pitch length being arranged adjacent one another, provide a tread with reduced tire noise.

Abstract: A tire tread has a plurality of base pitches arranged in at least two circumferential sections around the tire. The base pitches have at least two different pitch lengths and include a plurality of load-supporting tread blocks. The different pitch lengths of the base pitches form a pitch sequence in each circumferential section of the tire. The pitch sequences in the sections are arranged such that the noise produced by the base pitches in the tire tread is a low level, distributed noise to reduce the noise produced by the tire when the tire is in use.

Abstract: A pneumatic tire comprising a cylindrical tread, a pair of sidewalls, bead rings, a radial carcass, rubber fillers each arranged between each turn-up portions and a main body of the carcass and extending from above the bead ring toward the tread portion such that the radially sectional shape of the rubber film becomes narrower toward the tread portion, and a pair of thick rubber reinforcement layers arranged on respective axially inner sides of the carcass in the sidewall portions.

Abstract: A pneumatic tire has a tread pattern with blocks which are divided by two circumferential grooves extending in the circumferential direction of a tire and eighty-five or more lateral grooves crossing the circumferential grooves in a tread part. In the tread pattern, the quotient S.sub.T /S of the total groove area S.sub.T which is the sum of the circumferential groove area S.sub.G and the lateral groove area Sg in a ground contact surface S when the tire is mounted on a standard rim, inflated with a normal internal pressure and loaded with a normal load, to the ground contact area S is in a range from 0.15 to 0.25, and the rate Sg/S.sub.G of the lateral groove area Sg to the circumferential groove area S.sub.G is in a range from 0.33 to 0.53.