Bridgestone Corporation

Shigeki Yamada

Kenshiro Kato

Masanobu Takahashi

Motoaki Taniguchi

Kazuyuki Endo

Kuninobu Kadota

Katsuyuki Harakon

A radial tire for an aircraft includes a toroidal carcass layer consisting of carcass plies having cords embedded therein intersecting at angles of 70.degree.-90.degree. with respect to an equatorial plane of the tire, a tread rubber arranged radially outwardly of the carcass layers, and a belt layer arranged between the carcass layers and the tread rubber and constructed by laminating circumferential breaker plies and intersecting breaker plies. The circumferential breaker plies have cords embedded therein substantially in parallel with the equatorial plane. The intersecting breaker plies have cords embedded therein intersecting at angles of 10.degree.-70.degree. with respect to the equatorial plane. Both radially outermost and innermost breaker plies of the belt layers are constructed by intersecting breaker plies.

Radial tire for aircraft including both a circumferential breaker ply

A heavy duty radial tire comprises a tread portion, a pair of sidewall portions, a pair of bead portions, a carcass of at least two plies and a breaker, wherein each ply is composed of cords of aromatic copolyamide fiber having particular units A and B and a specific rubber composition having 100% modulus of 35-50 kg/cm.sup.2.

Heavy duty pneumatic radial tires with carcass plies composed of

A reinforcing laminate for use in a carcass or a belt of a heavy duty pneumatic radial tire comprises plural reinforcing layers piled one upon the other, each containing cords substantially arranged in parallel to each other and covered with a coating rubber, wherein the cords of the adjoining reinforcing layers are arranged in parallel to each other and the pitch between the cords in one of the reinforcing layers is shifted by an approximately half pitch from that of the other reinforcing layer.

Reinforcing laminate for tire and heavy duty pneumatic radial tire using

A heavy duty pneumatic radial tire for use in airplanes and the like is disclosed, which comprises a toroidal radial carcass, a belt superimposed about a crown region of the carcass, and a bead portion reinforcement comprised of a main chafer made from aromatic polyamide fiber cords, and an auxiliary chafer of at least two outer cord layers and at least two inner cord layers having a triangular truss structure defined by three cord layers among such four cord layers that the cords of the two outer cord layers are crossed with each other with respect to the meridional plane of the tire and the cords of the two inner cord layers are crossed with each other with respect to the meridional plane.

Heavy duty pneumatic radial tires

A heavy duty pneumatic radial tire for use in airplanes and the like is disclosed, which comprises a toroidal radial carcass, a belt superimposed about a crown region of the carcass and composed of at least three cord layers, and a bead portion reinforcement consisting of a stiffener composed of a hard rubber stock and a soft rubber stock, a main chafer made from aromatic polyamide fiber cords, and an auxiliary chafer of at least two cord layers covering the outside of said main chafer and at least one cord layer arranged along the inside of the turnup portion as an inner cord layer, and having such a triangular truss structure that cords of at least two cord layers are arranged at inclination angles of 65.degree..about.90.degree. and 35.degree..about.55.degree. with respect to the meridional plane of the tire, respectively, and cords of the remaining cord layer are arranged at an inclination angle of -50.degree..about.70.degree. with respect to the meridional plane.

Growing community of inventors

Tokyo, Japan

Shigeki Yamada