Sughrue, Mion, Zinn, Macpeak and Seas
Pneumatic tires having a high resistance to cut growth
 A pneumatic tire having an excellent cut resistance is disclosed, which comprises an annular crown portion constituting a tread, a pair of side portions supporting said crown portion, a pair of bead portions located at each foot of said side portions for fitting to a rim, a carcass layer composed of at least one rubberized cord ply toroidally extending between said bead portions and a liner layer disposed indise and adjacent to said carcass layer. In the tire according to the invention, a fault surface having an extremely low adhesion which intercepts the crack growth from the outside of the tire is further arranged in said liner layer at at least a part of a region extending between said bead portions. In the other tire according to the invention, for intercepting the crack growth from the outside of the tire, a low modulus middle rubber layer composed of rubber having a modulus lower than that of the adjoining rubber is further arranged in the tire at at least a part of a region extending between said bead portions. The growth of the cut damage especially given to the side portions of the tire is prevented by the fault surface or the low modulus middle rubber layer. 
Bridgestone Tire Company Limited
Y Y B Y Y B
Y10T Y10T B60C Y10S Y10T B60C
additional additional inventional additional additional inventional
Kenji Yasuo
Matsumoto Suzuki