Patent ID: 6561245
Filing Date: 2003-05-13
Classification: B60C,Y10T

Abstract:
A pneumatic radial ply runflat tire having a tread, a carcass with two sidewalls and two inextensible annular beads, a radial ply structure, one or more sidewall reinforcing inserts, and a belt structure located between the tread and the radial ply structure, at least one circumferentially deployed compression-stress-bearing belt reinforcing layer located in the region of the belt structure, and at least one circumferentially deployed tensile-stress-bearing fabric reinforcing layer located in the region of the radial ply structure, said runflat tire characterized by:the at least one circumferentially deployed compression-stress-bearing belt reinforcing layer having reinforcing metal cords being aligned between 20 degrees and 85 degrees with respect to the equatorial plane of the tire; the at least one circumferentially deployed tensile-stress-bearing fabric reinforcing layer having cords being aligned between 45 degrees and 85 degrees with respect to the equatorial plane of the tire; and the at least one fabric reinforcing layer having reinforcing cords of high modulus material selected from the group comprising aramid, rayon and polyester.