Resilient tires and wheels – Tires – resilient – Patches
Patent
1977-05-16
1979-02-20
Husar, Francis S.
Resilient tires and wheels
Tires, resilient
Patches
152374, 152361DM, B60C 918
Patent
active
041401662
ABSTRACT:
A pneumatic radial tire has as a reinforcement for a crown a belt consisting of a plurality of laminated plies whose cords intersect to each other. A coating rubber having a higher modulus is applied to the central zone of the belt which would be subjected to the most of the vertical stresses caused by the inner air pressure when the tire is inflated, and a coating rubber having a lower modulus is applied to the edge zones of the belt. The lower modulus coating rubber has a high elongation and a high tensile strength at break which serve to reduce shearing strains at the edges of the belt. Such coating rubbers having different properties are used in central and edge zones of the belt to match the requirement of the strengths of the belt, thereby increasing the service life of the tire.
REFERENCES:
patent: 3211819 (1965-10-01), Guyot
patent: 3773096 (1973-11-01), Masson
patent: 3902542 (1975-09-01), Imamura et al.
patent: 3907019 (1975-09-01), Montagne
Ishikawa Yoshiaki
Kamiya Yukihiko
Koyama Kazuo
Watanabe Shuichi
Bridgestone Tire Company Limited
Husar Francis S.
Williams Lawrence E.
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