Abstract: A method for making a knotless bead bundle, a bead bundle made according to the method, and a tire made using the knotless bead bundle are provided. In the method a bead ring is made using a plurality of annular turns of wire as is conventional in the art, and the annular turns of wire are wrapped with cord, tape, or other conventional wrapping material which is held on the bead ring without using knots. The wrap is held on the bead ring by using a tie down area that is made by forming a loop in the wrapping material, holding the loop in place by a number of close turns of wrap on the bead ring while leaving a first end of the wrapping material free, wrapping the bead ring 360.degree. around the ring, passing a second end of the wrapping material through the loop, closing the loop by pulling the first end of the wrapping material whereby closing the loop pulls the second end of the wrapping material under the close turns of wrapping material.

Abstract: A pair of radial tires consist of two tires each having a tread comprising annular land portions formed by a plurality of circumferential main grooves extending in the circumferential direction of the tire, and rows of blocks formed by extending transverse main grooves inclinedly in the circumferential direction in at least land portions located at axially opposite side edge portions of the tire. Tread patterns of these two tires are asymmetrical and have directional property. Transverse main grooves of each of the tires, which define the rows of the blocks to be located axially inside, are extended inclinedly downwardly toward the inner side of the tread in the width direction as viewed from the front side of the tire. Each of the transverse main grooves of the tire, which define the row of the blocks located axially on the outer side is extended in an almost inverse V-letter shape as viewed from the front side of the tire.

Abstract: A tire tread (20) comprises four circumferentially extending grooves (1-4) dividing the tread into five continuous ribs (10-14) of elastomeric material. The edges of the grooves, which separate the different ribs from each other are constituted by zig-zag shaped repetitive design units (5-8;35-38). The repetitive design units on either side of the grooves (1-4) extend in circumferentially opposite directions and have each four legs, a first (5;35) and third (7;37) short leg alternating with a second (6;36) and fourth (8;38) long leg. The ribs include series of deep (40-42, 43-45) and shallow (50-52, 53-55) sipes as well as deep (48, 49) cuts.

Abstract: Tires each having a tread pattern comprising sub-grooves diagonally disposed in the same direction are fitted on the left- and right-hand sides of an automobile such that imaginary lines extending respectively from the sub-grooves of the left- and right-hand tires of the same axles intersect each other on the front side of the automobile for the dry road running, while the imaginary lines intersect each other on the rear side of the automobile for the wet road running.

Abstract: A pneumatic radial tire for heavy-duty vehicles in which reinforcement belts comprising metal cords are disposed in the tread portion, and a plurality of main grooves extending in the circumferential direction of the tire are provided in the tread surface. In addition, recessed and projecting portions are provided on the edges of the tread surface in a zig-zag fashion along the circumferential direction of the tire.

Abstract: A tire of the closed torus type is made solid with a rim due to bead wires hich hug a body tightly between themselves and the rim. At each lateral end of the rim, a shoulder is provided and extended by a seat. Diameter .phi..sub.s of the seat is always less than the shoulder diameter .phi..sub.c, and the shape of the bead wire assumes the shape of the rim over at least a 45.degree. sector.

Abstract: A low noise pneumatic tire tread and method for producing same characterized by the minimization of the total amount of acoustic energy produced by a tire's tread as it rolls over a road surface by the strategic placement of grooves in a tread design such that the amount of groove void across at least one of the trailing and leading edges of the tread's footprint is substantially uniform about the circumference of the tire.

Abstract: A pneumatic tire involves a toroidal carcass ply extending between a pair of beads. The carcass ply consists of a main body located axially inside the beads and a pair of outer ply portions each extending along the main body of the carcass ply and on an axially outer side of the bead. A recess is provided on an outer surface of the tire between a radially outer end of each of the outer ply portions of the tire and the tire maximum width location such that a part of the recess is located in a zone surrounded by a curve C--C, a curve D--D, and an E-axis. The curve C--C satisfies d/s=1-0.825.times..sqroot.2.

Abstract: A profiled pneumatic vehicle tire is provided that comprises a tread surface that includes grooves that, when viewed in plan, extend at an angle relative to the circumferential direction of the tire. The grooves have sides that extend at an angle relative to a radial line. The distance between successive grooves in the circumferential direction is modulated in conformity with a pitch sequence that varies the excitation frequency, so that positive profiling portions having varying dimensions in the circumferential direction are provided between the grooves. Not only the dimension of the grooves in the circumferential direction are also modulated in conformity with the pitch sequence, but the tangent of the angle of the sides of the grooves are also modulated in conformity with the pitch sequence.

Abstract: There is disclosed tires for motor vehicles each having a tread provided with a plurality of large convex portions and small convex portions, the convex portions and the small convex portions being differentiated in heights and areas thereof, the small convex portions being disposed around the large convex portion for forming a plurality of normal pyramidal structures. The normal pyramidal structures are formed by disposing the large concave portion around the small concave portion. There is formed a reversed pyramidal structure by disposing the large convex portions around the small convex portion.

Abstract: A pneumatic radial tire with high durable bead portions includes a pair of bead portions, a pair of sidewalls and a tread extending between the sidewalls, and further includes as a body reinforcement a carcass extending between the bead portions and consisting of plies whose cords are radially arranged. At least one ply being turned up about bead cores of the bead portions from inside to outside of the tire to form a turn-up portions. A carcass pass line in radial section of the tire in its self-holding position filled with 5% of a normal inner pressure under no-load condition includes curvature changing areas in a carcass profile curved toward the turned-up portions in the proximities of positions corresponding to a height of turn-up ends of the ply from a rim diameter line to cause compressive stresses in the bead portions near to the turn-up ends of the ply by deformations of the carcass when the normal inner pressure is filled in the tire.

Abstract: A pneumatic vehicle tire having a carcass that is looped about two bead cores that comprise load-carrying members such as plastic filaments and/or metal wires, with beads in which the bead cores are disposed being capable of turning from a vulcanizing position into an operating position when the tire is being mounted on a wheel rim. In order to improve the tasks of the beads without adversely affecting their ability to turn, the surfaces of the load-carrying members of the bead cores, during turning of the beads prevent adhesion to vulcanized rubber at least to the extent that the load-carrying members are immersed in rubber in the vulcanizing position, so that each load-carrying member is individually rotatable about its longitudinal axis relative to the surrounding rubber of the pertaining bead.

Abstract: The tread design of a radial pneumatic tire for ground vehicles is characterized by lateral or transverse grooves on the shoulder ribs having an incline from the normal to the contact surface in one direction and the lateral or transverse grooves in the center of the tread width being inclined in the reverse direction. Improved wear rates with uniform wear is obtained on a drive axle with proper tire rotation. A reversed direction of rotation on the non-drive axle results in more even wear with potentially less vibration and noise.Lateral grooves are inclined form approximately 20 to 30 degrees and leading edges of some tread blocks have acute angles while other tread blocks have trailing edges with acute angles. The resultant distribution of longitudinal tangential stress on tread blocks is improved.

Abstract: A pneumatic tire having an annular band is provided, the annular band for reinforcing a bead portion and a sidewall portion of the pneumatic tire. In one embodiment, the annular band comprises a plurality of filaments having a high extensional modulus of elasticity and a high tenacity bonded together in a matrix of resin. Further, the annular band is cured or formed with a cross-section which tapers from the tire's bead portion to the tire's sidewall portion. Preferably, the annular band may be cured or formed in situ during the curing of the tire in which it is placed. In another embodiment, a structural element having a high resistance to compression is bonded to and circumferentially within the annular band. In a third embodiment the structural element is wedge-shaped in cross-section.

Abstract: A winter type tire tread (11) comprises an uneven number of, but at least three, circumferentially extending axially spaced grooves (4-6) and a plurality of zig-zag shaped grooves (36, 37) disposed circumferentially about the tire in a repetitive manner and extending across the tread from the equatorial plane (EP) towards the lateral edges (TE.sub.1, TE.sub.2) of the tire. The zig-zag shaped grooves (36, 37) situated on one side of the equatorial plane (EP) are symmetrical to those situated on the opposite side of the equatorial plane. The circumferentially and laterally extending grooves (4-6, 36, 37) define block elements (20-23), arranged in circumferentially extending rows (30-33) and having each at least in part the shape of a parallelogram. A plurality of sipes (15) are incorporated in each block element.

Abstract: A pneumatic radial tire having a bead portion in which at least two reinforcing layers comprising a steel cord reinforcing layer and a fiber cord reinforcing layer are arranged outer to a turnup portion of a carcass layer and are covered with a rubber stock, the bead portion being capable of exhibiting an enhanced durability.

Abstract: A core assembly for a pneumatic tire, which is fitted annularly to an outer peripheral surface of a well portion of a rim, and which rotates should the pneumatic tire collapse owing to a decline in its internal pressure, as an outer surface of the core assembly comes into contact with an inner peripheral surface of a crown portion of the pneumatic tire and an inner peripheral surface of the core assembly slides over the outer peripheral surface of the well portion of the rim. The core assembly includes a sliding portion formed of a resin material having good sliding properties and high heat resistance, and a main body to which the sliding member is secured and which is formed of a material having a high rigidity and a low specific gravity. Accordingly, since the surface of the core assembly contacting the rim is constituted by the sliding member, the core assembly is rotated smoothly when the internal pressure of the pneumatic tire declines, and the overal weight of the core assembly is reduced.

Abstract: A pneumatic tire particularly suited for agricultural or logging use is described. The tire has lateral-edge lugs with projections extending axially outward of the tire's maximum section width. The projections are radially inward of the ground contacting surface of the lug while also being radially outward of the inner tread surface. The projection extends axially inwardly and radially outwardly from the axially-outer-limit to the ground contacting surface of the tread lug. The projection further extends generally axially and radially inwardly from the axially-outer limit of the projection to the lateral edge of the inner tread surface from which the lug extends.

Abstract: A pneumatic radial tire comprises at least one circumferential groove arranged at an end portion in widthwise direction of a tread, and plural slant grooves arranged at an approximately equal interval in the circumferential direction of the tire. In this tire, a circumferential width of a portion of the slant groove located from the circumferential groove toward a tread end and opening to the circumferential groove is within a range of 1.5-3.0 times of a circumferential width of the slant groove at a position of ground contacting end.

Abstract: A heavy duty radial tire and rim assembly exhibiting improved bead durability, wherein the bottom face of the bead is composed of an axially inner face Si and an axially outer face So each tapered axially inward to decrease the diameter of the bottom face, the taper in the inner face Si is greater than that of the outer face So, the boundary between the inner face Si and the outer face So is located axially inward of the center of gravity of the bead core, and in the condition that the tire is mounted on a regular rim and inflated to a regular pressure, the axial distance X of the axially inner edge Q2 of the bead core from a bead heel Q1 defined as an intersection between a rim base line B and an extending line of the inner surface of a rim flange of the rim is not less than 80% and not more than 105% of the height HR of the radially outer edge Q3 of the rim flange from the rim base line; and the radial distance Y of the radially outer edge Q4 of the bead core measured radially inwardly from the radially out