Sughrue, Mion, Zinn & Macpeak & Seas, PLLC
Pneumatic tire with circumferential belt layer/inclined belt layer laminate
 The belt of a pneumatic tire is a laminate of a circumferential belt layer and an inclined belt layer, the circumferential belt layer comprising a plurality of reinforcing elements arranged substantially in parallel with the equatorial plane of the tire and coated with rubber, and the inclined belt layer comprising a plurality of reinforcing elements inclined with respect to the equatorial plane of the tire and coated with rubber, wherein at least in the coating rubber of the circumferential belt layer and the coating rubber of the inclined belt layer adjoining each other, the modulus of elasticity of the coating rubber of the circumferential belt layer is lower than that of the coating rubber of the inclined belt layer. The pneumatic tire of the invention avoids the disadvantage generated by addition of a circumferential belt layer while strengthening the circumferential rigidity by the circumferential belt layer. 
Bridgestone Corporation
B Y Y B Y B B B B B
B60C Y10T Y10T B60C Y10T B60C B60C B60C B60C B60C
inventional additional additional inventional additional inventional additional inventional additional inventional
Tatsuo
Nakano