Pneumatic radial tire with noise suppressing rubber sheet in the

Details Pneumatic radial tire with noise suppressing rubber sheet in the Pneumatic radial tire with noise suppressing rubber sheet in the

1991-08-16

1993-06-22

Ball, Michael W.

Resilient tires and wheels

Tires, resilient

Pneumatic tire or inner tube

152539, 152547, B60C 1506

Patent

active

052213854

ABSTRACT:
A pneumatic radial tire having a rubber sheet incorporated in a region lying between a bead core and at least an outer surface portion of the bead portion which is in contact with a rim on which the tire is mounted, to suppress the noise generation. The rubber sheet has a dynamic modulus of elasticity at 20.degree. C., E'(20.degree. C.), of 6.0 MPa to 14.0 MPa and a ration of the dynamic modulus E'(20.degree. C.) to a dynamic modulus of elasticity at 60.degree. C., E'(60.degree. C.), namely E'(20.degree. C.)/E'(60.degree. C.), of at least 1.2 but less than 1.4.

REFERENCES:
patent: 4235273 (1980-11-01), Edwards et al.
patent: 4824899 (1989-04-01), Yasuda
patent: 5033524 (1991-07-01), Ohtsuka

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