Tire

Patent metadata

Field	Value
Publication number	US-12420600-B2
Application number	US-202218564727-A
Country	US
Kind code	B2
Filing date	Jul 19, 2022
Priority date	Jul 26, 2021
Publication date	Sep 23, 2025
Grant date	Sep 23, 2025

Abstract

A rubber chafer is disposed on an outer side in the tire width direction of a bead filler. A tire comprises a conductive member. The inner end in the tire radial direction of the conductive member is located at a tire radial position of an outer end in the tire radial direction of the rubber chafer or in a tire radial region inner in the tire radial direction than the outer end in the tire radial direction of the rubber chafer. The conductive member extends from the inner end in the tire radial direction thereof outwardly in the tire radial direction to at least a position of any of the reinforcement layers which is conductive among the one or more reinforcement layers.

First claim

The invention claimed is:

1. A tire comprising:
a tread portion,
a pair of bead cores embedded in a pair of bead portions,
a carcass comprising one or more carcass plies, each of which consists of a carcass body portion straddling toroidally over the pair of bead cores and a carcass turn-up portions extending from the carcass body portion and folded back around the bead cores,
a reinforcement member comprising two conductive reinforcement layers adjacent to each other in the tire radial direction disposed on the outer side in the tire radial direction of a crown portion of the carcass,
a tread under cushion disposed on the outer side in the tire radial direction of the two conductive reinforcement layers, the tread under cushion being conductive, and
an antenna rubber disposed on the outer side in the tire radial direction of the tread under cushion, wherein
a bead filler is disposed on the outer side in the tire radial direction of the bead core, and a rubber chafer is disposed on the outer side in the tire width direction of the bead filler,
the tire further comprises a pair of conductive members, each extending in the tire radial direction,
a tire radial inner end of each conductive member of the pair of conductive members is located at a tire radial outer end of the rubber chafer or in a tire radial region farther inward in the tire radial direction than the tire radial outer end of the rubber chafer,
a tire radial outer end of the each conductive member of the pair of conductive members terminates in a region between the two conductive reinforcement layers in the tire radial direction,
the tire radial outer end of the each conductive member terminates at a position located inward in the tire width direction than an end in the tire width direction of the reinforcement layer having the smallest width among the two conductive reinforcement layers, and
the antenna rubber is free of direct contact with the pair of conductive members.

2. The tire according to claim 1 , wherein the each conductive member of the pair of conductive members is a conductive fiber member.

3. The tire according to claim 2 , wherein the conductive fiber member is made of cotton fibers and pieces of SUS blended and twisted together.

4. The tire according to claim 1 , wherein the carcass is non-conductive.

5. The tire according to claim 1 , wherein the rubber chafer, the region between the two conductive reinforcement layers in the tire radial direction, and the antenna rubber are conductive.

Assignees

• Bridgestone Corp

Inventors

• Goto Fumiya

Classifications

• B60C19/08

  Electric-charge-dissipating arrangements · CPC title

• B60C19/082

  comprising a conductive tread insert · CPC title

• B60C2009/1828

  characterised by special physical properties of the belt ply · CPC title

• B60C2015/0614

  characterised by features of the chafer or clinch portion, i.e. the part of the bead contacting the rim · CPC title

• B60C19/088 Primary

  using conductive beads · CPC title