Pneumatic vehicle tire with four steel cord belt plies

Patent metadata

Field	Value
Publication number	US-9975381-B2
Application number	US-201414267334-A
Country	US
Kind code	B2
Filing date	May 1, 2014
Priority date	Nov 1, 2011
Publication date	May 22, 2018
Grant date	May 22, 2018

Abstract

A pneumatic vehicle tire of a radial type of construction is for heavy trucks and has a four-ply belt ( 3 ). Each belt ply ( 7, 8, 9, 10 ) contains steel cords as reinforcing elements which run parallel to one another in each belt ply. Not only are the angles (β, γ) that the steel cords in the second and third belt plies ( 8, 9 ) form with the circumferential direction (A-A) approximately equal, but also the angles (α, δ) that the steel cords in the first and fourth belt plies ( 7, 10 ) form with the circumferential direction (A-A) are likewise approximately equal.

First claim

What is claimed is:

1. A pneumatic vehicle tire having a radial configuration for heavy trucks and defining a circumferential direction A-A, the pneumatic vehicle tire comprising:
a four ply belt having a radially innermost first belt ply, a second belt ply, a third belt ply, and a fourth belt ply;
a rubber ply arranged between said third belt ply and said fourth belt ply;
said first, second, third, and fourth belt ply each including steel cords configured as reinforcement members;
said steel cords of each of said first belt ply, said second belt ply, said third belt ply, and said fourth belt ply running parallel to the other steel cords of the same belt ply;
said steel cords of said first, second, third, and fourth belt plies having a predetermined slope sequence of rightward increasing (R) and leftward increasing (L) slope with respect to the circumferential direction A-A starting with said steel cords of said radially innermost first belt ply;
said steel cords of said second belt ply enclosing an angle β with the circumferential direction A-A;
said steel cords of said third belt ply enclosing an angle γ with the circumferential direction A-A;
said angle β and said angle γ being equal;
said steel cords of said first belt ply enclosing an angle α with the circumferential direction A-A;
said steel cords of said fourth belt ply enclosing an angle δ with the circumferential direction A-A;
said angle α and said angle δ being equal;
wherein said rubber ply has a thickness in the range of 1.5 mm to 3.5 mm;
wherein said angle α and said angle δ are 40°; and
wherein said angle β and said angle γ are 24°.

2. The pneumatic vehicle tire of claim 1 , wherein:
said steel cords of said first belt ply and said second belt ply have a rightward increasing slope with respect to the circumferential direction A-A; and,
said steel cords of said third belt ply and said fourth belt ply have a leftward increasing slope with respect to the circumferential direction A-A.

3. The pneumatic vehicle tire of claim 1 , wherein:
said steel cords of said first belt ply, said second belt ply and said fourth belt ply have a rightward increasing slope with respect to the circumferential direction A-A; and,
said steel cords of said third belt ply have a leftward increasing slope with respect to the circumferential direction A-A.

4. The pneumatic vehicle tire of claim 1 , wherein:
said steel cords of said first belt ply and said third belt ply have a rightward increasing slope with respect to the circumferential direction A-A; and,
said steel cords of said second belt ply and said fourth belt ply have a leftward increasing slope with respect to the circumferential direction A-A.

Assignees

• Continental Reifen Deutschland Gmbh

Inventors

• Herta Katie
• Bartke Joerg
• Zheng Dong

Classifications

• Y10T152/10801

  Structure made up of two or more sets of plies wherein the reinforcing cords in one set lie in a different angular position relative to those in other sets · CPC title

• B60C9/2006 Primary

  consisting of steel cord plies only · CPC title

• B60C2009/1871

  with flat cushions or shear layers between belt layers · CPC title

• Y10T152/10792

  Structure where each bias angle reinforcing cord ply has no opposingly angled ply · CPC title

• B60C2009/2016

  comprising cords at an angle of 10 to 30 degrees to the circumferential direction · CPC title