Resilient tires and wheels – Tires – resilient – Pneumatic tire or inner tube
Patent
1987-05-28
1988-10-25
Ball, Michael W.
Resilient tires and wheels
Tires, resilient
Pneumatic tire or inner tube
152555, B60C 1706
Patent
active
047796588
ABSTRACT:
To improve the durability and the riding comfortableness of a pneumatic safety tire having at least one carcass ply, at least one belt layer, and a pair of crescent-shaped cross-section reinforcing layers, each of the reinforcing layers comprises a higher elastic rubber layer with a hardness of 70 to 85 in Shore A and an elastic modulus of 25 to 60 kg/cm.sup.2 and an anticrack rubber layer with a hardness of 55 to 70 in Shore A and an elastic modulus of 10 to 30 kg/cm.sup.2. The maximum thickness of the reinforcing layer is preferably 4 to 12 mm. Load applied to the tire during run-flat travel is supported mainly by the higher elastic rubber layer, and crack generation due to tire deformation is reduced by the presence of the anticrack rubber layer.
REFERENCES:
patent: 3911987 (1975-10-01), Takusagawa et al.
patent: 4261405 (1981-04-01), Yamauchi et al.
patent: 4263955 (1981-04-01), Ikeda
patent: 4265288 (1981-05-01), Kaneko et al.
patent: 4287924 (1981-09-01), Deck et al.
patent: 4365659 (1982-12-01), Yoshida et al.
Kawabata Misao
Takahashi Ichiro
Tsuda Toru
Ushikubo Hisao
Yamada Tsuguyoshi
Ball Michael W.
Bridgestone Corporation
Hoch Ramon R.
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