PNEUMATIC VEHICLE TIRE

Abstract

A pneumatic vehicle tire at least having: a tread including an outer tread cap with a profiled tread and an inner tread base, a carcass, a bead region with a bead core, an inner layer and sidewalls is provided. The material thickness (d(2)) of the tread base is configured to decrease from the center of the tread toward each of the side walls. Furthermore, a method for retreading a pneumatic vehicle tire is provided.

Claims

1-3 (canceled)

4. A pneumatic vehicle tire comprising: a tread having an outer tread cap with a profiled tread and an inner tread base; a carcass; a bead region having a bead core; an inner layer; said tread defining a tread center; two sidewalls; and, said inner tread base having a material thickness d(2), wherein said material thickness d(2) decreases from said tread center toward each of said two sidewalls.

5. The pneumatic vehicle tire of claim 4, wherein said outer tread cap has a constant profile depth over the entirety of said tread.

6. A method for retreading a tire having a carcass, an inner bead region with a bead core, an inner layer and two sidewalls, the method comprising the step of: retreading a pneumatic vehicle tire with a tread having an outer tread cap with a profiled tread and an inner tread base, wherein the inner tread base has a material thickness d(2) and the material thickness d(2) decreases from a tread center toward each of the two sidewalls of the tire.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The invention will now be described with reference to the drawings wherein:

[0017] FIG. 1 shows a detail of a section transverse to the running direction through a pneumatic vehicle tire known from the prior art in the region of the tread;

[0018] FIG. 2 shows a detail of a section transverse to the running direction through a pneumatic vehicle tire according to an embodiment of the invention in the region of the tread in a first configuration; and,

[0019] FIG. 3 shows a detail of a section transverse to the running direction through a pneumatic vehicle tire according to an embodiment of the invention in the region of the tread in a further configuration.

DESCRIPTION OF THE PREFERRED EMBODIMENTS OF THE INVENTION

[0020] FIGS. 1 to 3 show in each case a detail of a section transverse to the running direction through a pneumatic vehicle tire in the region of the tread. In the details of the pneumatic vehicle tire that are shown here, the tread is shown with an outer tread cap 1, which forms the profiled tread, and an inner tread base 2, and also the carcass 3 lying thereunder. The profile of the tread cap 1 has the depth t(1). Arranged underneath the carcass 3, there is also the airtight inner layer 4. The inner layer 4 has the material thickness d(4). Although not shown here in detail, the carcass 3 includes a number of fabric layers embedded in rubber and a breaker belt, for example of steel, for strengthening the fabric and the rubber.

[0021] According to the prior art, see FIG. 1, the material thickness d(2) of the tread base 2 is formed with a constant thickness over the entire tread, or from the inside to the outside.

[0022] The pneumatic vehicle tires according to the invention differ from the prior art in that the material thickness d′(2) or d″(2) of the tread base 2 decreases from the center of the tread, indicated here by the dashed line, toward each of the sidewalls. This can be realized by two different configurations of the tread base 2.

[0023] The first configuration is shown in FIG. 2. Here, the material thickness d″(2) in the side regions is reduced in comparison with the material thickness d′(2) in the middle. The material thickness d′(2) in the middle consequently corresponds to the original material thickness d(2) according to FIG. 1.

[0024] The other configuration is shown in FIG. 3. Here, the material thickness d′(2) in the middle is increased in comparison with the material thickness d″(2) in the side regions. The material thickness d″(2) in the side regions consequently corresponds to the original material thickness d(2) according to FIG. 1.

[0025] In the case of both configurations, the upper side of the tread base 4 has a form that is arched more in comparison with the underside, while the underside of the tread is almost straight. Furthermore, the material thickness d(4) of the inner layer 4 is formed as constant.

[0026] It is understood that the foregoing description is that of the preferred embodiments of the invention and that various changes and modifications may be made thereto without departing from the spirit and scope of the invention as defined in the appended claims.

REFERENCE NUMERALS

[0027] 1 Tread cap [0028] 2 Tread base [0029] 3 Carcass [0030] 4 Inner layer [0031] d (2), d′(2), d″(2) Material thickness of the tread base [0032] d (4) Material thickness of the inner layer [0033] t (1) Profile depth of the tread cap