Resilient tires and wheels – Tires – resilient – Pneumatic tire or inner tube
Patent
1995-06-28
1997-05-06
Johnstone, Adrienne C.
Resilient tires and wheels
Tires, resilient
Pneumatic tire or inner tube
152539, 152542, 152543, 152546, 152547, 152549, 152552, 152555, B60C 902, B60C 908, B60C 1500, B60C 1506
Patent
active
056266987
ABSTRACT:
A pneumatic radial tire comprises a pair of bead cores, at least one radial carcass ply comprised of a main body and a turnup portion, and a stiffener arranged between the main body and each turnup portion wound around each bead core, in which each stiffener is composed of first, second and third stiffener members, and a boundary surface X between the first and second stiffener members is inclined outward in the radial direction so as to approach to the main body and a boundary surface Y between the second and third stiffener members is inclined outward in the radial direction so as to separate away from the main body, and a ply end rubber member made from rubber having a hardness between the hardnesses of the first and third stiffener members is arranged on an outer end region of the turnup portion in the radial direction.
REFERENCES:
patent: 5056575 (1991-10-01), Yamaguchi et al.
patent: 5433257 (1995-07-01), Yamaguchi et al.
European Search Report (Dated Nov. 15, 1995).
Patent Abstract's of Japan--English translation of Abstract.
Aoki Yasutoshi
Tsuruta Makoto
Bridgestone Corporation
Johnstone Adrienne C.
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