Resilient tires and wheels – Tires – resilient – Pneumatic tire or inner tube
Patent
1985-10-25
1988-12-13
Ball, Michael W.
Resilient tires and wheels
Tires, resilient
Pneumatic tire or inner tube
152541, 152546, B60C 1506
Patent
active
047903660
ABSTRACT:
In a pneumatic radial tire for heavy duty vehicles having a pair of bead portions, each of the bead portions comprises at least first, second and third chafer plies disposed around the carcass. The third chafer ply has a cord angle larger than those of the first and second chafer plies. The first, second and third chafer plies have a first chafer height h.sub.1 measured in the radial direction from a laterally outward and radially outermost end of the first chafer ply to a heel point at which a bead base of the bead portion and a flange portion of a rim having mounted the bead base thereon are intersected with each other, a second chafer height h.sub.2 and a third chafer height h.sub.3, respectively. The carcas has a fold-back height H measured in the radial direction from a radially outermost end of the fold-back portion thereof to the heel point, the first, second and third chafer heights h.sub.1, h.sub.2 and h.sub.3 being selected within ranges defined by the following equations, ##EQU1## The third chafer height h.sub.3 is taller than the other chafer heights h.sub.1 and h.sub.2.
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patent: 4319621 (1982-03-01), Motomura et al.
patent: 4398584 (1983-08-01), Tansei et al.
Ball Michael W.
Bridgestone Corporation
Hoch Ramon R.
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