Resilient tires and wheels – Tires – resilient – Pneumatic tire or inner tube
Patent
1986-06-04
1987-12-29
Czaja, Donald E.
Resilient tires and wheels
Tires, resilient
Pneumatic tire or inner tube
152559, B60C 906
Patent
active
047154209
ABSTRACT:
In a pneumatic tire of the type which consists of a pair of right and left beads; a pair of right and left side walls continuing the beads, respectively, and a tread interposed between the side walls, and in which a carcass cord layer is spread between the beads, and at least two layers consisting of a belt reinforcing layer whose reinforcing cords have a cord angle of from 15.degree. to 30.degree. with respect to the circumferential direction of the tire and a belt reinforcing layer whose reinforcing cords have a cord angle of from 150.degree. to 165.degree. with respect to the tire circumferential direction, are laminated and disposed between the tread and the carcass cord, a pneumatic tire for a passenger car characterized in that the carcass cord layer has a two-layered laminate structure consisting of upper and lower carcass cord layers; the angle of reinforcing cords constituting each of the carcass cord layers with respect to the tire circumferential direction, when measured from the side in which the angle of the reinforcing cords of the belt reinforcing layer on the contact side with the carcass cord layer describes an acute angle with respect to the tire circumferential direction, is such that the mean value 1/2(.alpha..sub.1 +.alpha..sub.2) of the angle .alpha..sub.2 of the reinforcing cords of the carcass cord layer on the contact side with the belt reinforcing layer and the angle .alpha..sub.1 of the reinforcing cords of the carcass cord layer below the former is from 96.degree. to 108.degree. and their difference (.alpha..sub.2 -.alpha..sub.1) is from 10.degree. to 40.degree.; the upper carcass cord layer consists of nylon fibers while the lower carcass cord layer consists of polyester fibers; and both ends of the upper and lower carcass cord layers are turned up around the bead wires, respectively.
REFERENCES:
patent: 2990870 (1961-07-01), Vittorelli
patent: 3245454 (1966-04-01), Lewis
patent: 3498355 (1970-03-01), Sperberg
patent: 3630258 (1971-12-01), Sperberg
patent: 4257469 (1981-03-01), Uemura
patent: 4469157 (1984-09-01), Morikawa et al.
patent: 4585045 (1986-04-01), Morikawa et al.
Kabe Kazuyuki
Morikawa Tuneo
Czaja Donald E.
Hoch Ramon R.
The Yokohama Rubber Co. Ltd.
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