Patent ID: 7093631
Filing Date: 2006-08-22
Classification: B60C,Y10S

Abstract:
1. A multipurpose tyre for a motor vehicle, comprising: a tread; wherein the tread comprises a first shoulder region, a central region, and a second shoulder region, wherein a first circumferential groove separates the central region from the first shoulder region, wherein a second circumferential groove separates the central region from the second shoulder region, wherein the central region comprises at least a first row of blocks and a second row of blocks, wherein the first row of blocks and the second row of blocks are arranged between an equatorial plane of the tyre and either the first circumferential groove or the second circumferential groove, wherein the first row of blocks is separated from the second row of blocks by first oblique grooves, extending in a first oblique direction relative to the equatorial plane of the tyre, and second oblique grooves, extending in a second oblique direction relative to the equatorial plane of the tyre, wherein each first oblique groove is connected to a second oblique groove at a first essentially T-shaped junction, wherein each first oblique groove is connected to another second oblique groove at a second essentially T-shaped junction, wherein at the first essentially T-shaped junction, a first angle on the axially outer side of the first oblique groove between the first oblique direction, toward the second essentially T-shaped junction, and the second oblique direction, along the second oblique groove, is greater than or equal to about 95° and less than or equal to about 115°, wherein at the second essentially T-shaped junction, a second angle on the axially inner side of the first oblique groove between the first oblique direction, toward the first essentially T-shaped junction, and the second oblique direction, along the another second oblique groove, is greater than or equal to about 95° and less than or equal to about 115°, wherein at least two blocks of the first row are separated from each other, at least in part, by a third oblique groove extending in a direction substantially parallel to the second oblique direction, wherein the third oblique groove is connected to one of the first oblique grooves at an end of the first oblique groove nearest the equatorial plane of the tyre, and wherein the third oblique groove ends at the end of the one first oblique groove so as to form an elbow join.