Abstract:
Reinforcing structure at bead sections of radial tires for heavy load comprising(1) at least one carcass ply(2) at least one chafer(3) a circular triangular composite rubber stiffener composed of a lower half portion having a higher modulus and an upper half portion having a lower modulus, which is disposed between a case main portion and the turned-over carcass ply portion and(4) a reinforcing member composed of at least two rubberized organic fiber cord layers arranged at the case main portion, the inward end in the radial direction of said reinforcing member being locked with the bead base and said reinforcing member being disposed along a circular region having a given height at the case main portion.
Abstract:
A safety pneumatic tire which can run under its punctured condition.The tire is provided between a sidewall reinforcing layer and a tread wall reinforcing layer with a reduced thickness portion which can easily susceptible to bending deformation so as to notify a driver by his bodily sensation that the tire is punctured.
Abstract:
A pneumatic tire is disclosed having a carcass with cords lying in radial or substantially radial planes, a strip of metal cords in the bead zone and the lower part of the sidewall extending radially from the core zone to from 25 to 45% of the tire section height with the cords inclined at an angle of 5.degree. to 15.degree. with respect to the circumferential lines of the tire and an axially outer situated second strip of cords of tension and compression resistant material, the cords of the second strip being inclined in an opposite sense to the cords of the first strip angled at 45.degree. to 90.degree. with respect to the circumferential lines of the tire. The tire structure permits the elimination of sidewall deformations when the tire runs at high speed along a curved trajectory, making for good riding comfort.
Abstract:
A radial carcass pneumatic tire having a carcass ply turn-up portion includes a reinforcement ply folded around each bead ring. Each reinforcement ply overlaps and extends beyond the turn-up edge of the carcass play and includes for example a steel cord portion of thick cross-section abutting a textile cord portion of thinner cross section. The cords throughout the reinforcement ply are arranged obliquely with the cords of the radial carcass ply. In other respective embodiments a transition zone between the thick and thin portions of the reinforcement ply includes a cover strip, an overlapping portion and a filler strip. The bead reinforcement constructions reduce bead element edge separations and provide a desirable graduated stiffness from the bead to the beginning area of the sidewall permitting optimal transferring of torque and force.
Abstract:
A pneumatic tire for high speed running vehicles having an aspect ratio of 0.25 to 0.75 and a carcass composed of at least two plies each formed of a textile cord layer including parallel cords crossed with those of the other ply. The carcass satisfies the following conditions:(1) The cord has an initial modulus of at least 100 g/denier;(2) The cords are embedded in rubber having a modulus of elasticity at 300% elongation of 100 to 250 kg/cm.sup.2 ;(3) The cords are inclined at an angle of 20.degree. to 40.degree. with respect to the equatorial plane of the tire;(4) The cords have a gap ratio in each ply of 10 to 65% and a gap ratio between adjacent plies of 22 to 83%.
Abstract:
A pneumatic tire for vehicles comprising a main carcass body and an improved bead portion construction is disclosed. The bead portion comprises two bead wires and the remainder of the main carcass body having two ends wound around the two bead wires from the inside toward the outside thereof to form a turn-up portion. The turn-up portion is substantially closely disposed adjacent to the main carcass body and extended upwardly along the side surface of the main carcass body.
Abstract:
A pneumatic tire having an improved heel structure includes a two element rubber filler assembly extending from a bead core toward the tread, generally decreasing in thickness in a direction away from the bead core. One of the filler elements is reinforced rubber having a Shore A hardness between 85.degree.-93.degree. whereas the other filler element, in mutual contact with the first, is nonreinforced rubber having a Shore A hardness between 70.degree. to 95.degree.. The contact surface between the two filler elements forms an oblique angle with the equatorial plane of the tire.
Abstract:
Reversion resistant rubber compositions comprising 100 parts by weight of sulfur vulcanizable rubber(s) of which at least 50 parts by weight are natural rubber and/or cis-polyisoprene, sulfur, a thiocarbamyl sulfenamide accelerator, and optionally a benzothiazole accelerator and/or a thiazole sulfenamide accelerator.
Abstract:
A radial carcass pneumatic tire having a carcass ply turn-up portion includes a reinforcement ply folded around each bead ring. Each reinforcement ply overlaps and extends beyond the turn-up edge of the carcass ply and includes for example a steel cord portion of thick cross-section abutting a textile cord portion of thinner cross section. The cords throughout the reinforcement ply are arranged obliquely with the cords of the radial carcass ply. In other respective embodiments a transition zone between the thick and thin portions of the reinforcement ply includes a cover strip, an overlapping portion and a filler strip. The bead reinforcement constructions reduce bead element edge separations and provide a desirable graduated stiffness from the bead to the beginning area of the sidewall permitting optimal transferring of torque and force.
Abstract:
A radial ply pneumatic tire having an axial spacing between the beads when in the mold which is greater than the axial spacing of the beads when mounted on a rim and in which the width of the ground contacting tread surface is no greater than the axial spacing of the beads when mounted on a rim. The tire is further characterized by an annular recess in each outer sidewall for disassociating the tread structure from the sidewalls and lower bead areas, and a wedge of hard rubber bridging the space between the rim flange and lower sidewall portion for improving the reaction between the rim and a specially rigidified lower sidewall area to provide rapid steering response.The foregoing abstract is not to be taken as limiting the invention of this application, and in order to understand the full nature and extent of the technical disclosure of this application, reference must be made to the accompanying drawings and the following detailed description.