Patent ID: 8919403
Filing Date: 2014-12-30
Classification: B60C,Y10T

Abstract:
1. A pneumatic tire comprising a tread, a carcass and a belt structure interposed between the carcass and the tread, wherein the belt structure includes a pair of working belts, wherein the angle of the working belts range from about 15 degrees to about 30 degrees, wherein the working belts have a % elongation at 10% of the breaking load in the range of 0.18 to about 0.26, wherein the belt structure further includes a zigzag belt structure located radially between the working belts, the zigzag belt structure is formed of at least two layers of cords interwoven together from a strip of rubber reinforced with one or more cords, wherein the strip forming the zigzag belt structure is layed up in a first zigzag winding extending from a first lateral belt edge to a second lateral belt edge in a zigzag wavelength having a first amplitude W 1 immediately followed by a second amplitude W 2 in the opposite direction of said first amplitude, wherein the strip forming the zigzag belt structure is layed up in a second zigzag winding immediately following the first winding, wherein the strip extends from a first lateral belt edge to a second lateral belt edge in a zigzag wavelength having a first amplitude W 2 immediately followed by a second amplitude W 1 in the opposite direction of said first amplitude, wherein W 1 ≠W 2 , wherein the zigzag belt structure is formed of a cord having a % elongation at 10% of breaking load greater than 0.45%, when taken from wire from a cured tire.