Patent ID: 6386652
Filing Date: 2002-05-14
Classification: B60C,B62D

Abstract:
A pneumatic drive tire (10) for a tracked vehicle (1) having a pair of annular beads (24), a carcass reinforcing structure (34) extending radially outwardly from bead (24) to bead (24), an elastomeric sidewall (16) extending radially outwardly from each bead (22) adjacent the carcass reinforcing structure (30) to a radially outer tread (12), the tread (12) being characterized by,an inner tread (14); a plurality of lugs (40) extending radially outwardly from the inner tread surface (14) a distance (h), the lugs (40) being divided into a first row and a second row, the first row extending from the sidewall (16) toward the center plane of the tread (12), the second row extending from the opposite sidewall (16) toward the center plane of the tread (12), the lugs (40) of the first row being circumferentially offset and similar in shape but oppositely oriented relative to the lugs (40) of the second row, each lug (40) having an enlarged axially inner end (46); a shallow circumferentially continuous center rib (50) extending radially outwardly from the inner tread surface (14) a distance of less than half (h); and wherein the combination of lugs (40), inner tread surface (14) and a shallow central continuous rib (5) are spaced to create voids of continuous soil discharge channels (70) extending across the tread (12) from sidewall (16) to opposite sidewall (16).