Pneumatic tire with specified first and second carcass plies

Patent metadata

Field	Value
Publication number	US-10202003-B2
Application number	US-201615048482-A
Country	US
Kind code	B2
Filing date	Feb 19, 2016
Priority date	Mar 15, 2012
Publication date	Feb 12, 2019
Grant date	Feb 12, 2019

Abstract

A pneumatic tire comprising: first carcass ply that is comprised of; a tire-inner-face part extending along inner face of the tire to span between the tire bead portions; and turned-up parts extended as turned up from outer faces of the tire bead portions up to inside beyond fringes of a belt layer; and second carcass ply that is substantially omitted at between the tire bead portions and extends as being turned up from outer faces of the tire bead portions up to inside beyond fringes of a belt layer; and cords forming the tire-inner-face part, the turned-up part and the second carcass ply having inclination to radial direction of the tire; and direction of the inclination of the cords being alternated in respect of leftward or rightward, between two adjacent ones of the tire-inner-face part, the turned-up part and the second carcass ply.

First claim

What is claimed is:

1. A pneumatic tire, comprising:
a belt layer;
two bead portions, each bead portion comprising a bead core having an axially inner face and an axially outer face;
a first carcass parallel cord ply that is comprised of a tire-inner-face part extending along the inner face of the tire to span between the axially inner faces of the respective bead cores and turned-up parts extended as turned up from the axially outer faces of the respective bead cores up to inside beyond fringes of the belt layer; and
a second carcass parallel cord ply that is omitted along the inner face of the tire at between the axially inner faces of the respective bead cores and extends as being turned up from the axially outer faces of the respective bead cores up to inside beyond fringes of the belt layer; and
the parallel cords forming the tire-inner-face part, the turned-up parts and the second carcass ply having an inclination to the radial direction of the tire; and
the direction of the inclination of the cords being alternated in respect of leftward or rightward, between two adjacent ones of the tire-inner-face part, the turned-up parts and the second carcass ply,
wherein the first carcass ply has a jetty portion, which is further protruded from the respective turned-up end of the second carcass ply inward along the tire-width direction, and
wherein the cords in the jetty portion have a larger inclination with respect to the tire radial direction than in the remaining part of the first carcass ply.

2. The pneumatic tire according to claim 1 , wherein deflection of the cords in the jetty portion with respect to the cords in the remaining part of the respective turned-up part of the first carcass ply is in a range of 15 to 45 degrees.

3. A pneumatic tire, comprising:
a belt layer;
two bead portions, each bead portion comprising a bead core having an axially inner face and an axially outer face;
a first carcass parallel cord ply that is comprised of a tire-inner-face part extending along the inner face of the tire to span between the axially inner faces of the respective bead cores and turned-up parts extended as turned up from the axially outer faces of the respective bead cores up to inside beyond fringes of the belt layer; and
a second carcass parallel cord ply that is omitted along the inner face of the tire at between the axially inner faces of the respective bead cores and extends as being turned up from the axially outer faces of the respective bead cores up to inside beyond fringes of the belt layer; and
the parallel cords forming the tire-inner-face part, the turned-up parts and the second carcass ply having an inclination to the radial direction of the tire; and
the direction of the inclination of the cords being alternated in respect of leftward or rightward, between two adjacent ones of the tire-inner-face part, the turned-up parts and the second carcass ply,
wherein the first carcass ply has a jetty portion, which is further protruded from the respective turned-up end of the second carcass ply inward along the tire-width direction, and
wherein the inclination of the cords with respect to the tire-circumferential direction is in a range of 20 to 55 degrees in the jetty portion, and is in a range of 60 to 85 degrees in the remaining part of the first carcass ply.

Assignees

• Toyo Tire & Rubber Co

Inventors

• Kato Tatsuya

Classifications

• B60C15/0009

  features of the carcass terminal portion · CPC title

• B60C15/0045

  with ply turn-up up to the belt edges, i.e. folded around the bead core and extending to the belt edges · CPC title

• B60C9/07

  the cords curve from bead to bead in plural planes, e.g. S-shaped cords · CPC title

• B60C15/0072

  with ply reverse folding, i.e. carcass layer folded around the bead core from the outside to the inside · CPC title

• B60C9/0207 Primary

  Carcasses comprising an interrupted ply, i.e. where the carcass ply does not continuously extend from bead to bead but is interrupted, e.g. at the belt area, into two or more portions of the same ply · CPC title