Resilient tires and wheels – Tires – resilient – Pneumatic tire or inner tube
Patent
1997-05-27
1999-09-28
Johnstone, Adrienne C.
Resilient tires and wheels
Tires, resilient
Pneumatic tire or inner tube
152539, 152546, 152547, B60C 1500, B60C 1506
Patent
active
059581638
ABSTRACT:
A pneumatic radial tire includes a carcass ply formed from one radial cord layer, a belt and tread disposed at a crown portion radial direction outer side of the carcass ply, and bead fillers and bead reinforcing layers disposed at the bead portions, wherein the carcass ply is formed from a carcass ply main body extending from one bead portion to another, and carcass ply turn-over portions wound about bead cores and extending toward radial direction outer sides. The bead filler is interposed between the carcass ply main body and the carcass ply turn-over portion, and tapers from directly above the bead core toward a radial direction outer side. The bead reinforcing layer is interposed between the carcass ply main body and the bead filler. An upper end of the bead reinforcing layer extends along the carcass ply main body to a position at 30 to 80% of a tire cross-sectional height, and is disposed further toward a radial direction outer side than an upper end of the bead filler. The bead reinforcing layer is formed from a rubber covered cord layer in which organic fiber cords having a modulus of elasticity of 700 to 1500 kg/mm.sup.2 are embedded in parallel in rubber.
REFERENCES:
patent: 5117888 (1992-06-01), Shimizu
patent: 5164029 (1992-11-01), Oohashi et al.
Patent Abstracts of Japan, Publication No. JP 08-175131 A, dated Jul. 9, 1996 (Bridgestone Corp).
Patent Abstracts of Japan, Publication No. JP 63-049502 A, dated Mar. 2, 1988 (Sumitomo Rubber Ind Ltd).
Bridgestone Corporation
Johnstone Adrienne C.
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