Tread of heavy duty pneumatic radial tire

Details Tread of heavy duty pneumatic radial tire Tread of heavy duty pneumatic radial tire

1992-03-02

1998-02-24

Knable, Geoffrey L.

Resilient tires and wheels

Tires, resilient

Anti-skid devices

B60C10100

Patent

active

057208310

ABSTRACT:
A tread of a heavy-duty pneumatic radial tire comprises a pair of upper and lower rubber layers having mutually different moduli of elasticity and a small-width groove formed in the upper rubber layer in such manner as to be substantially continuous in a circumferential direction of the tire. The dimension between a boundary surface bordering the two rubber layers and a bottom of the groove is set to be 1 mm or more. Accordingly, the arrangement prevents the occurrence of cracks due to a deforming stress acting in the groove bottom occurring when the tire rolls or rides on a curbstone.

REFERENCES:
patent: 3157218 (1964-11-01), Brown
patent: 3411559 (1968-11-01), Verdier
patent: 3759306 (1973-09-01), Gruner et al.
patent: 3830275 (1974-08-01), Russell
patent: 4200134 (1980-04-01), Takigawa et al.
patent: 4214618 (1980-07-01), Takigawa et al.
patent: 4480671 (1984-11-01), Giron
patent: 4724878 (1988-02-01), Kabe et al.

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