PNEUMATIC TIRE Russian patent published in 2012 - IPC B60C11/04 B60C11/11 B60C11/13 

FIELD: transport.

SUBSTANCE: invention relates to automotive industry. Pneumatic tire comprises inner and outer (relative to vehicle) crown grooves (3i, 3o) arranged on both sides of tire centerline to extend along tire lengthwise direction. Central zone 5 of contact with soil is formed between aforesaid grooves while bent inclined grooves 8 are arranged at central zone 5 of contact with soil. Each said bent inclined groove 8 runs from outer end extending into crown outer lengthwise groove 3o to extend beyond tire centerline and is inclined toward inner side relative to vehicle to vary direction toward inner side relative to vehicle and toward inner end at aforesaid central zone 5. Said bent inclined grooves 8 are interconnected by connection grooves 11 extending in tire lengthwise direction on inner ends. Central contact zone 5 includes central rib 5a surrounded by connection grooves 11 and sections of inclined grooves 8 extending between connection grooves 11, and by crown lengthwise groove 3i. Central rib 5a extends continuously in tire lengthwise direction at recurring increase and decrease in tire width in direction toward tire axis.

EFFECT: better control and water venting.

6 cl, 9 dwg