Patent ID: 7201242

Claim:
A track-driven all-terrain vehicle comprising: a vehicle body portion; multiple drive track units supporting the body portion; each of said drive track units including: a track frame, including a carrier beam extending longitudinally of said vehicle; a powered rotatable track drive wheel assembly supported on said frame; plural guide wheel assemblies mounted on said carrier beam and in spaced apart relationship along said beam; an endless track trained about said drive wheel assembly and said guide wheel assemblies and being drivingly engaged by said drive wheel assembly and supported during ground engagement by said guide wheel assemblies; each said guide wheel assembly including a wheel spindle fixedly mounted to said carrier beam and extending a substantial distance laterally inwardly and outwardly beyond said carrier beam, an outer guide wheel unit rotatably mounted on an outwardly extending portion of said wheel spindle, and an inner guide wheel unit rotatably mounted on an inwardly extending portion of said wheel spindle such that said outer and inner guide wheel units are axially spaced apart on opposite sides of the carrier beam and define the width of said assembly; said endless track comprising a drive belt extending laterally beyond opposite sides of said carrier beam and having multiple laterally spaced-apart and circumferentially extending rows of drive lugs extending inwardly from an inner surface of said belt, said multiple rows including at least one row on each of the opposite sides of said carrier beam; said drive wheel assembly comprising a sprocket wheel means including drive cogs for drivingly engaging drive lugs in all of said multiple rows simultaneously, including said rows on opposite sides of said carrier beam; and said inner and outer guide wheel units of said guide wheel assemblies each including outer track support surfaces that support substantially the full width of said drive belt except where said rows of drive lugs are positioned.