Characterized By The Carcass, Carcass Material, Or Physical Arrangment Of The Carcass Materials Patents (Class 152/548)
  • Patent number: 4541467
    Abstract: A heavy duty pneumatic radial tire is disclosed, which comprises a tread portion, a pair of side portions, a pair of bead portions each reinforced with a bead ring, a radial carcass ply, a metal cord reinforcing layer and a composite rubber filler. In this tire, the carcass ply is a rubberized layer of aromatic polyamide fiber cords and a tip of its turnup portion terminates at a position lower than an upper end of a rim flange when the tire is mounted on a rim. In the metal cord reinforcing layer, one end facing the turnup portion terminates over the tip of the turnup portion and the other end facing the carcass ply extends toward the side portion over a position corresponding to the above-mentioned one end facing the turnup portion.
    Type: Grant
    Filed: February 16, 1984
    Date of Patent: September 17, 1985
    Assignee: Bridgestone Tire Company Limited
    Inventors: Masao Nakamura, Kenji Karato