Patent ID: 6983812

Claim:
A drive track unit for a track-driven all-terrain vehicle, the drive track unit including: a track unit frame including a carrier beam extending longitudinally of the track unit; plural guide wheel assemblies rotatably mounted on said carrier beam; a drive wheel assembly rotatably supported on said frame; an endless drive track trained about said guide wheel assemblies and the drive wheel assembly; a drive axle drivingly connected at one end portion to said drive wheel assembly for rotating the assembly and adapted for connection to a power source on a vehicle; said plural guide wheel assemblies and said drive wheel assembly supporting said endless track in a generally triangular configuration with the drive wheel assembly at the apex of said configuration and said guide wheel assemblies spaced apart along the base of the configuration so that the track defines a terrain-engaging lower track run; said guide wheel assemblies each including multiple guide wheel units, with at least one said guide wheel unit mounted on each of the opposite sides of said carrier beam; said endless track having a track width defined by inner and outer track reaches extending laterally inwardly and outwardly beyond the carrier beam and terminating at inner and outer track edges; each said guide wheel unit of a guide wheel assembly including a track support surface engaging and supporting said endless track such that the track support surfaces of a guide wheel assembly support substantially the full width of the drive track; said drive track comprising an elastomer drive belt having circumferentially spaced apart drive lugs extending inwardly from an inner surface of the belt and arranged in multiple circumferentially extending rows, said drive wheel assembly including a sprocket wheel means including cogs for drivingly engaging the lugs in each of said rows.