Tire having circumferential tread with reinforced ribs
AssigneeBridgestone Americas Tire Operations, LLC
InventorRobert W. Asper
Life of this patent
Estimating the term…
Abstract
A pneumatic tire includes a pair of sidewalls, a pair of bead portions, and a circumferential tread having a plurality of circumferential ribs and a plurality of circumferential grooves. A reinforcing layer is disposed in at least one of the plurality of circumferential ribs. No part of the reinforcing layer extends directly below a bottom surface of any of the plurality of circumferential grooves. The reinforcing layer has a consistent gauge along its entire lateral width. A top surface of the reinforcing layer is located radially higher than the bottom surface of each of the plurality of circumferential grooves.
Claims8
A pneumatic tire comprising:
- a pair of sidewalls;
- a pair of bead portions;
- a carcass ply extending between the pair of bead portions;
- a circumferential tread having a plurality of circumferential ribs and a plurality of circumferential grooves, including a first circumferential rib having a first rib width defined by a first circumferential groove and one of a second circumferential groove and a tread edge,
- wherein the first circumferential rib includes a reinforcing layer having a width less than the first rib width, such that the reinforcing layer is enclosed by the first circumferential rib,
- wherein the reinforcing layer includes multiple sub-layers, including a first sub-layer of reinforcing organic cords and a second sub-layer of reinforcing steel cords, and
- wherein a top surface of the reinforcing layer is located radially higher than a bottom of the first circumferential groove and radially higher than a bottom of the second circumferential groove;
- and
- a single belt ply disposed between the carcass ply and the circumferential tread.
Dependencies are inferred from the claim text.