PNEUMATIC TIRE Russian patent published in 2011 - IPC B60C11/11 B60C11/04 B60C11/13 

FIELD: transport.

SUBSTANCE: invention relates to automotive industry. Pneumatic tire half-section obtained by dividing tire tread by treat pattern central line into halves comprises: central main groove 3, lateral main groove, abrupt grooves 7 and central contact section 6 divided into multiple blocks 14 that form a line of blocks 15. Abrupt groove 7 has sloped groove bottom section 8 wherein groove depth increase gradually from central main groove 3 toward first lateral main groove 5. First acute-angles section arranged between central main groove 3 and each abrupt groove 7 has first chamfered section 9, wherein contact section height decreases gradually toward edge 9 from its crest. It has also sloped section 8 of groove bottom and first sloped section 9 located adjoining each other in direction W of tire width.

EFFECT: reduced noise and wear, improved draining properties and higher stability.

11 cl, 7 dwg