TIRE TREAD FOR AUTOMOBILES, ESPECIALLY, FOR USE ON SNOW-COVERED ROADS Russian patent published in 2006 - IPC B60C11/11 B60C11/12 

FIELD: tire industry.

SUBSTANCE: proposed tire tread has three ring grooves and great number of cross grooves limiting four rows of blocks arranged along circumference, namely, two axial external shoulder rows and two central rows along sides of equatorial plane. Cross grooves meet in equatorial plane in preset direction of tire rolling. Each cross groove of tread central rows has widening of cross section of mainly circular profile formed at equal distance from ends and designed for gripping of snow. To provide low noise level when running along dry road, front cross edge profiles of adjacent blocks of central rows contains at least two series curvilinear sections.

EFFECT: improved gripping on snow-covered road, provision of noiseless running along dry roads and increased wear resistance of tread blocks.

33 cl, 7 dwg