Snowmobile suspension

Claim 1

IN AN ENDLESS TRACK VEHICLE, AN ENDLESS FLEXIBLE BELT HAVING A FLAT INNER SURFACE AND UPPER AND LOWER VERTICALLY SPACED RUNS, A SUSPENSION ASSEMBLY HAVING RESILIENT BIASED ROLLING SUPPORT ON THE LOWER INNER SURFACE OF SAID ENDLESS BELT, SAID SUSPENSION ASSEMBLY COMPRISING A MAIN BEARING SHAFT MOUNTED BENEATH SAID VEHICLE TRANSVERSELY ABOVE THE LOWER INNER SURFACE OF SAID ENDLESS BELT, A PLURALITY OF WHEEL-SUPPORTING ASSEMBLIES MOUNTED ON SAID SHAFT, EACH WHEEL-SUPPORTING ASSEMBLY HAVING BEARING SLEEVE MEANS JOURNALED ON SAID SHAFT, SAID BEARING SLEEVE MEANS COMPRISING A PLURALITY OF COLINEAR TUBULAR SLEEVE SECTIONS EXTENDING THE LENGTH OF SAID SHAFT, SAID BEARING SLEEVE MEANS BEING DISPOSED IN OPPOSED PAIRS LONGITUDINALLY OF SAID ENDLESS BELT AND ON OPPOSITE SIDES OF THE MIDPOINT OF SAID SHAFT WITH ADJACENT ENDS OF SAID SLEEVE SECTIONS BEING IN SUBSTANTIALLY ABUTING, COAXIAL ENGAGEMENT, A LEVER ARM EXTENDING FROM AN INTERMEDIATE PORTION OF EACH OF THE RESPECTIVE SLEEVE SECTIONS AND SPACED INWARDLY FROM THE OUTER EDGE OF SAID FLEXIBLE BELT, SAID LEVER ARMS TERMINATING IN AT LEAST ONE LATERAL AXLE, AT LEAST ONE WHEEL JOURNALED ON EACH LATERAL AXLE, AND AT LEAST A PAIR OF TORSION SPRINGS EACH CIRCUMPOSED ABOUT ABUTTING ENDS OF THE SLEEVE SECTIONS AND INCLUDING OPPOSITELY DIRECTED END PORTIONS EXTENDING ALONG SAID RESPECTIVE LEVERS, SAID LEVERS INCLUDING LATERAL ABUTMENT PORTIONS ENGAGED BY THE RESPECTIVE ENDS OF SAID TORSION SPRINGS, SAID WHEELS BEING TRANSVERSELY SPACED WITH RESPECT TO EACH OTHER AND DISPOSED IN PAIRS ON OPPOSITE SIDES OF THE LONGITUDINAL CENTER OF SAID ENDLESS BELT, EACH OF SAID WHEEL-SUPPORTING ASSEMBLIES BEING IDENTICAL AND INTERCHANGEABLE.