Resilient tires and wheels – Tires – resilient – Patches
Patent
1980-09-04
1981-10-20
Ball, Michael W.
Resilient tires and wheels
Tires, resilient
Patches
152357R, 152362R, 152359, 260 5, 260 4232, 260 4247, 525232, 525236, 525241, B60C 906, B60C 1506
Patent
active
042955122
ABSTRACT:
A thick-cord lightweight tire body having an improved fatigue life is disclosed. The tire body comprises a bias-structured carcass composed of rubberized plies each including thick organic fiber cords and rubber interposed between the carcass plies. The rubber has a thickness corresponding to hm/ho.ltoreq.0.5, where hm is an average rubber gauge between the plies at a center position in a widthwise direction of tire and, ho is a diameter of the thick cord, and is a rubber composition consisting essentially of 100 parts by weight of a rubber component and 50-70 parts by weight of carbon black. The rubber component is a mixture of 60-95 parts by weight of a rubber and 5-40 parts by weight of a liquid polymer having a viscosity-average molecular weight of 3.times.10.sup.4 -10.times.10.sup.4. The rubber composition has a dynamic modulus of elasticity E' at 100.degree. C. under 2% elongation given by E'.gtoreq.6.0.times.10.sup.7 dyne/cm.sup.2, a dynamic loss angle tan .delta. given by tan .delta..ltoreq.0.095 and a tensile strength of not less than 100 kg/cm.sup.2 as properties after vulcanization.
REFERENCES:
patent: 3674078 (1972-07-01), Sasaki et al.
patent: 3682223 (1972-08-01), Simpson
patent: 4193437 (1980-03-01), Powell
patent: 4209050 (1980-06-01), Yoshida et al.
patent: 4257469 (1981-03-01), Uemura
Kawaguchi Yasuyosi
Shimotake Munetoshi
Yamamoto Fujio
Ball Michael W.
Boland Lois E.
Bridgestone Tire Company Limited
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