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Tyre tread for motor vehicles, particularly for snow-covered ground

A technology for motor vehicles and tires, applied in the direction of tire tread/tread pattern, special tires, tire parts, etc., can solve problems such as dry road noise, and achieve the effect of weakening the impact

Inactive Publication Date: 2006-08-23
PIRELLI TYRE SPA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] However, a tread pattern suitable for grip on snow, being a block type, causes a certain level of noise on dry roads due to the continuous impact of the lateral sides of the block on the ground

Method used

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  • Tyre tread for motor vehicles, particularly for snow-covered ground
  • Tyre tread for motor vehicles, particularly for snow-covered ground
  • Tyre tread for motor vehicles, particularly for snow-covered ground

Examples

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Embodiment Construction

[0047] Referring now to Figure 1, reference numeral 1 generally designates a motor vehicle tire according to the invention, for example a tire of the 195 / 65 R15 class.

[0048]The tire 1 comprises a carcass structure 2 comprising a central crown 3 and two sidewalls 4, 5, said carcass structure 2 being provided with a reinforcing layer 2a whose opposite ends 2b, 2c are connected to Bead wires 6, 7 located radially inside said side walls 4, 5 work together. In the illustrated case, the ends of the layer are wound around said bead wires, in which case an elastomeric filler 8 is applied on the radially outer periphery of the bead wires 6, 7 in order to occupy the The space formed between the reinforcement layer 2a and the respective end portions 2b, 2c of the reinforcement layer 2a.

[0049] It is known that each of the opposing regions of the tire 1 comprises a bead wire 6, 7 and filler 8, constituting so-called beads 9 and 10, which serve to fix the tire 1 to the corresponding ...

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PUM

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Abstract

Winter tyre for vehicle wheels, provided with a tread comprising three circumferential grooves (15, 16, 17) and a plurality of transverse grooves (22, 23, 24, 25) which jointly delimit four circumferential rows of blocks, namely two axially outer shoulder rows (20, 21) and two centre rows (18, 19) at the sides of the equatorial plane. The transverse grooves converge on the equatorial plane in the direction of rolling specified for the tyre. In the tread, each transverse groove (22, 23) of the centre rows is made to comprise a widening of the cross section with an essentially circular profile, formed at a distance from the ends, for trapping snow. To obtain quieter running on dry roads, the front transverse edge profiles of the adjacent blocks of the centre rows are made to comprise at least two successive curvilinear portions. These curvilinear portions are shaped in different ways and with opposite curvatures to each other, to form means of attenuating the noise arising from the impact of the tread pattern on dry roads when the tyre is rolling.

Description

technical field [0001] The invention relates to tires for motor vehicles, especially for use on snowy terrain. Background technique [0002] As is known, a tire in its most common form comprises a carcass structure comprising a central crown and two axially opposed sidewalls terminating in a pair of beads for securing the tire to the rim ; a belt structure coaxially engaged with the carcass structure; and a tread extending coaxially around the belt structure. [0003] The tread consists of a relief pattern, usually composed of a plurality of transverse and longitudinal grooves which together form a plurality of blocks of different configurations, for example extending across the equatorial plane along a central region, in At least two shoulder regions extend at axially opposite sides of the central region. [0004] For driving on snow-covered surfaces, it is especially important that there are suitable sipes in the blocks, in other words, the presence of closely spaced not...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C11/11B60C11/12B60C11/03B60C1/00B60C11/04B60C11/13
CPCB60C11/12B60C11/0302B60C11/11Y10S152/03Y10S152/902Y10S152/903
Inventor 詹弗兰科·科隆博马里奥·伊索拉
Owner PIRELLI TYRE SPA