TIRE TREAD Russian patent published in 1994 - IPC

FIELD: production of tires, in particular, devices for providing sufficient grip of tires of drive wheels of agricultural tractors, road-building machines, trucks, heavy-duty cars with bearing base. SUBSTANCE: tire tread has casing 1, ground- engaging members 2 with front thrust surface 3 and rear thrust surface 4. Front thrust surface 3 is higher than rear thrust surface 4. Radius 6 of tire and straight line extending through outer points of thrust surfaces 3,4 definite angle of α in cross- section of ground-engaging member 2 parallel to equatorial plane of tire. Supporting surface 5 may be flat, convex, concave and convex- concave. EFFECT: improved traction and gripping properties of tires on hard, low-plasticity soils and grounds. 5 cl, 8 dwg