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Vehicle tire with continously reducing vertical spacing of tread surface with respect to breaker

Imported: 24 Feb '17 | Published: 06 Jan '04

Manfred Gerresheim, Klaus Riehl, Saburo Miyabe, Hans-Joachim Winter

USPTO - Utility Patents

Abstract

A vehicle tire comprises a carcass ply (

1) extending between two bead regions, a tread region disposed between side walls (

7,8) and having a tread surface (

6) curved in the axial direction and also a breaker (

5) reinforcing the tread region and arranged between the carcass ply and tread region, characterised in that in the normally inflated state of the tyre mounted on a tyre rim, the vertical spacing of the tread surface (

6) with respect to the breaker continuously reduces, starting from the region of the tyre centre (

3), towards the breaker edges (

13, 14) and in that the side walls (

7, 8) are made at least substantially self-supporting.

Description

Further advantageous embodiments and features of the invention are given in the dependent claims and are described below with reference to the drawing in the description of an embodiment.

BRIEF DESCRIPTION OF DRAWINGS

The single FIGURE of the drawing shows a cross-sectional representation of a vehicle tyre in accordance with the invention.

Claims

1. A vehicle tire comprising a carcass ply (

1) extending between two bead regions, a tread region disposed between side walls (

7,

8) any having a tread surface (

6) curved in the axial direction and also a breaker (

5) reinforcing the tread region and arranged between the carcass ply and tread region, wherein in the normally inflated state of the tire mounted on a tire rim, the vertical spacing of the tread surface (

6) with respect to the breaker continuously reduces, starting from the region of the center of the tire (

3), towards the breaker edges (

13,

14) and the side walls (

7,

8) are made at least substantially self-supporting, and wherein the breaker (

5) is made substantially flat over its entire width and is first curved in the direction of the carcass ply (

1) in the region (

9,

10) of the breaker edges (

13,

14).

2. A tire in accordance with claim 1, wherein the breaker (

5) is arranged free of intermediate plies on the single carcass ply (

1).

3. A tire in accordance with claim 1, wherein the breaker (

5) is comprised of steel.

4. A tire in accordance with claim 3, wherein the breaker is comprised of two steel cord plies lying on top of one another.

5. A tire in accordance with claim 1, wherein the breaker (

5) is comprised of aramide.

6. A tire in accordance with with claim 5, wherein the breaker is comprised of two aramide plies lying on top of one another.

7. A tire in accordance with claim 1, wherein the tread surface (

6) when considered in cross-section extends in accordance with an involute in the region of the center of the tire (

3).

8. A tire in accordance with claim 1, wherein the radical or vertical spacing between the tread surface (

6) and the breaker (

5) ranges in the region of the breaker edges to from about 15% to 40% of the corresponding spacing at the center of the tread (

3).

9. A tire in accordance with claim 8, wherein said radial or vertical spacing ranges from 20% to 30%.

10. A tire in accordance with claim 1, wherein the breaker edge (

13,

14) have a spacing with respect to the center of the tire (

3) which is substantially the same as the spacing of the tire beads (

2) from the center of the tire.

11. A tire in accordance with claim 1, wherein the essentially flat breaker (

5) is bandage-free.

12. A tire in accordance with claim 1, wherein the side walls (

7,

8) are each made at least substantially self-supporting via at least one reinforcement ply (

11,

12) disposed inside the carcass ply (

1), which respectively surrounds a bead core apex (

4) from the inside to the outside and substantially radially radially outside the bead core apex (

4) surrounded by the carcass ply (

1).

13. A tire in accordance with claim 12, wherein the maximum thickness of the at least one reinforcement ply (

11,

12) is disposed approximately at the half height of the tire.

14. A tire in accordance with claim 1, wherein the axial course of the tread surface (

6) is selected to be asymmetrically curved with respect to the tire center (

3).

15. A tire in accordance with claim 1, wherein the tread which comes into contact with the ground during straight-ahead travel is significantly smaller than the tire width.

16. A tire in accordance with claim 15, wherein approximately 25% to 30% of the total tread surface is taken up by grooves or channels of the tread profile.

17. A tire in accordance with claim 16, wherein approximately 28% of the total tread surface is taken up by grooves or channels of the tread profile.