Resilient tires and wheels – Tires – resilient – Pneumatic tire or inner tube
Patent
1998-12-31
2000-06-27
Johnstone, Adrienne C.
Resilient tires and wheels
Tires, resilient
Pneumatic tire or inner tube
152539, 152546, 152548, 152552, 152554, B60C 516
Patent
active
060794674
ABSTRACT:
A heavy duty radial tire comprises a carcass ply being turned up around bead cores from the axially inside to the outside of the tire, a bead apex disposed between the carcass main portion and each turnup portion, the turnup portion extending radially outwardly beyond the radially outer end of the bead apex so that the turnup portion has a parallel part which is placed adjacent to and substantially in parallel with the main portion, and a chafer disposed in each bead portion and extending radially outwardly beyond the radially outer end of the bead apex along the axially outside of the turnup portion. The thickness T2 of the chafer is 0.3 to 1.0 times the total rubber thickness T1 between the tire outer surface and the carcass when measured along a straight line drawn at a right angle to the carcass main portion through the radially outer end of the bead apex. The length L of the parallel part is in the range of 0.5 to 5.0 times a section width CW of the bead core. In the parallel part, the rubber thickness N between the carcass cords of the turnup portion and those of the main portion is 0.15 to 4.5 times the maximum diameter K of the carcass cords.
Johnstone Adrienne C.
Sumitomo Rubber Industries Ltd.
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