US Patent No. 9,290,062

TYRE AND TYRE BUILDING METHOD


Patent No. 9,290,062
Issue Date March 22, 2015
Title Tyre And Tyre Building Method
Inventorship Philip Heijnen, Rome (IT)
Assignee BRIDGESTONE CORPORATION, Tokyo (JP)

Claim of US Patent No. 9,290,062

1. A tyre comprising:
two beads;
a toroidal body ply wound about the two beads to form two turn-ups; and
two bead fillers, each of which contacts a bead, is at least partly enclosed inside a turn-up of the body ply and comprises
a first elastomer ring, which is placed between the body ply and the bead, is turned up about the bead to bring into close
proximity two opposite ends of the first elastomer ring that are connected to each other by the curing;

wherein a higher end of the first elastomer ring projects from the turn-up of the body ply such that an outer surface of the
higher end of the first elastomer ring is not in direct contact with a body ply;

wherein the first elastomer ring is made from a softer elastomer mix than the elastomer covering of the body ply or is made
from the same elastomer mix as the elastomer covering of the body ply;

wherein each bead filler also comprises a second elastomer ring, which is placed on top of the first elastomer ring between
the two opposite ends of the first elastomer ring; and

wherein each second elastomer ring is made from a softer elastomer mix than the first elastomer ring.