Resilient tires and wheels – Tires – resilient – Pneumatic tire or inner tube
Patent
1994-12-28
1996-09-24
Johnstone, Adrienne C.
Resilient tires and wheels
Tires, resilient
Pneumatic tire or inner tube
152526, 152531, 152533, B60C 918, B60C 920
Patent
active
055581447
ABSTRACT:
A pneumatic radial tire containing a non-metallic cord breaker belt disposed radially outside a carcass, and a jointless band belt disposed radially outside the breaker belt, said band belt being made of at least one hybrid cord wound spirally and continuously in the circumferential direction of the tire at an angle of 0 to 3 degrees with respect to the tire equator. The hybrid cord includes a low elastic modulus thread and a high elastic modulus thread which are finally-twisted together, said low modulus thread having at least one low modulus fiber, first-twisted and having an elastic modulus of not more than 2000 kgf/sq.mm and said high modulus thread having at least one high modulus fiber first-twisted and having an elastic modulus of not less than 3000 kgf/sq.mm. In the band belt ply, the count (E) of the hybrid cord per 5 cm width, the stress (F1) in kgf of the hybrid cord at 2% elongation, and the stress (F2) in kgf of the hybrid cord at 6% elongation satisfies the following relationships: FI.times.E<60; and F2.times.E>150.
REFERENCES:
patent: 4957799 (1990-09-01), Miyamoto et al.
patent: 5373885 (1994-12-01), Yamashita
patent: 5419383 (1995-05-01), Iwamura
patent: 5436076 (1995-07-01), Nakata et al.
Patent Abstracts of Japan; vol. 16 No. 103; 13 Mar. 1992 & JP-A-03 279004 (Ohtsu Tire & Rubber Co., Ltd); 10 Dec. 1991.
Miyazaki Shinichi
Nakayasu Ritsuo
Johnstone Adrienne C.
Sumitomo Rubber Industries Ltd.
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