Patent ID: 6920906
Filing Date: 2005-07-26
Classification: B60C,Y10S

Abstract:
1. A pneumatic tire comprising a pair of sidewalls with axially outermost surfaces terminating in a pair of bead areas, a plurality of circumferentially extending ribs including at least a pair of shoulder ribs formed of spaced tread lugs extending outwardly from an inner tread surface and terminating in ground engaging surfaces providing a tread pattern for said tire; a plurality of lugs formed integral with the sidewalls and extending outwardly from the axially outermost surface of the sidewalls, said lugs including a plurality of circumferentially spaced lug groups arranged in a circular pattern along each of the sidewalls, each lug group includes first, second, and third lugs; each of said first lugs having a top surface, a lower surface, and an outer surface extending radially along the sidewall from said top surface toward the bead area of the tire, said first lugs having a pair of side surfaces extending between the outer surface of said lugs and the sidewall of the tire forming sharp corners with said outer surface to provide forward fraction for the tire when in deep soil; each of said second lugs having an outer surface extending radially along the sidewall from adjacent the ground engaging surface of an adjacent shoulder rib lug toward the bead area; each of said third lugs being in general radial alignment with said second lug and extending from adjacent said second lugs toward the bead area; said first lugs being located between adjacent pairs of the radially aligned second and third lugs forming irregularly shaped radially extending grooves therebetween to reduce the accumulation of soil and debris between the lugs; the outer surfaces of the first lugs being located outwardly from the outermost surfaces of the sidewalls a greater distance than the outer surfaces of the second and third lugs to provide the forward fraction for the tire, with the outer surfaces of the second and third lugs sloping in the same direction inwardly toward the sidewall of the tire in the direction toward the ground engaging surface to deflect debris away from the sidewalls.