Abstract:
A tire having a crown, two sidewalls and two beads, a carcass casing anchd in the two beads and having cords worked back and forth next to each other aligned circumferentially with, in each bead, loops each connecting back and forth cord portions, and in each bead, carcass casing anchoring cords oriented circumferentially and axially bordering the circumferential rows of the back and forth arrangement of carcass casing cords, wherein the carcass casing consists of cords forming two or three circumferential rows separated, at least in the beads and the sidewalls, by a filler.
Abstract:
An aircraft tire, the inflation pressure of which is greater than 12 bar, comprises a crown, two sidewalls and two beads, a carcass reinforcement anchored in the two beads and a crown reinforcement. The carcass reinforcement comprises at least two circumferential alignments of first reinforcing threads of high elasticity modulus. The means for anchoring the first reinforcing threads within each bead comprises second reinforcing threads oriented circumferentially and axially bordering the circumferential alignments of the first reinforcing threads, the first reinforcing threads and second reinforcing threads being separated by a layer of mix of very high elasticity modulus.
Abstract:
A tire having a crown, two sidewalls and two tire beads, a carcass reinforcement anchored in the two tire beads and a belt reinforcement, said belt reinforcement including at least two superposed reinforcement plies formed with cords parallel in each ply and criss-crossed from one ply to the other forming with the circumferential direction angles (&agr;, &bgr;) ranging between 10° and 55° and characterized in that the cords of at least one of the two reinforcing plies are successively in contact, on the same side of said ply, moving from the tire equatorial plane towards one of the reinforcing ply lateral ends with a rubber bonding layer having a first modulus of elasticity and then a rubber bonding layer of a second modulus of elasticity lower than the first.
Abstract:
A tire wherein the reinforcing cords of the carcass, in the part situated between the anchoring zone of the carcass and the sidewall, are in contact with at least one layer of cushion compound having a high modulus of elasticity on the axially outer side and a low modulus of elasticity on the axially inner side and in the sidewall.
Abstract:
Tire intended for winter travel, having a tread comprising relief elements provided with slits inclined with respect to the normal to the tread and which are close to each other and form strips between each other, is improved due to the fact that, when the tire is not under load, the slits are inclined with respect to said normal by an angle at most equal to 45.degree. in the direction of the tangential stresses on the tire exerted by the ground and due to the fact that these slits have a width which is other than zero.
Abstract:
A tire includes two beads and a carcass reinforcement anchored in the beads. The carcass reinforcement has at least two circumferential alignments of first reinforcing threads. Each such circumferential alignment is, within each bead, bordered axially inwardly and outwardly by second circumferential reinforcing threads having an elasticity modulus at least equal to that of the first threads. The first and second threads are separated by a rubber mix of high elasticity modulus. The outer surface of each bead includes a seat which includes an arc-shaped wall section having a geometrical center arranged axially outwardly relative to the bead. Considering an imaginary straight line passing through both the center and the bead at an angle α=+45±5 degrees relative to the tire axis, all of the second threads are spaced from that axis by a radial distance no larger than the locus of the imaginary line.
Abstract:
Tire containing a crown, two sidewalls and two beads, a carcass reinforcement with first reinforcing cords placed adjacent, aligned circumferentially in at least one circumferential alignment from at least one of said beads to one of said sidewalls and anchored in said one bead, and a crown reinforcement, said one bead containing an anchoring zone enabling the carcass reinforcement to be maintained and including at least one circumferentially oriented second reinforcing cord cooperating with an adjacent portion of the carcass reinforcement by means of a rubber anchoring compound in contact with the second reinforcing cord and the adjacent sections of the first reinforcing cords, wherein the rubber anchoring compound has a modulus of elasticity at a 10% deformation ranging between 10 and 20 MPa and wherein the rubber anchoring compound comprises at least one synthetic elastomer in the SBR group and of polybutadienes with a total proportion of synthetic elastomer exceeding 50% of the total weight of elastomers.
Abstract:
A tire has a carcass reinforcement preferably formed of a series of circumferential turns of a strip formed of a matrix of elastomeric material reinforced by cords which are arranged side by side and extend transversely in the strip, the turns of strip being arranged in such a manner that, when observed in radial section, they exhibit at least a certain overlap.
Abstract:
A tire with a radial carcass reinforcement anchored in each bead and with a crown reinforcement formed of four crossed working plies forming an angle of between 10.degree. and 45.degree. with the longitudinal direction of the tire is improved due to the fact that the working plies form a block of two superimposed pairs of plies of crossed cables, the plies of the first pair forming opposite angles equal to .beta. and the plies of the second pair forming opposite angles equal to .alpha., .beta. being greater than .alpha., the difference .beta.-.alpha. being at least equal to the value of the expressionh sin (.beta.+.alpha.)/2z