Pneumatic radial tires with one-piece molded stiffener having at

Details Pneumatic radial tires with one-piece molded stiffener having at Pneumatic radial tires with one-piece molded stiffener having at

1995-08-24

1997-09-23

Johnstone, Adrienne C.

Resilient tires and wheels

Tires, resilient

Pneumatic tire or inner tube

152539, 152543, 152547, B60C 1500, B60C 1506

Patent

active

056699948

ABSTRACT:
A pneumatic radial tire, particularly a large-size and low-section profile pneumatic radial tire for truck and bus includes a stiffener disposed between a main body portion and each turnup portion of a carcass and constructed with a one-piece molded body of two or more rubber compositions having different hardnesses. A rubber composition having a highest hardness is arranged near to the main body portion of the carcass as a deformation-isolating rubber member having a greatest thickness at a position separated from a perpendicular line (Lv) drawn from an end of the turnup portion toward an outer surface of the carcass main body portion in tire cross-section, at least in a side of the tread portion among both sides sandwiching the perpendicular line (Lv), and a rubber composition having a lower hardness is arranged along an inner surface of the turnup portion.

REFERENCES:
patent: 4917166 (1990-04-01), Iuchi
Patent Abstract of Japan vol. 015, No. 509, 24 Dec. 1991; JP A 03 224805 (Bridgestone Corp), 3 Oct. 1991.

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