Patent ID: 6510913
Filing Date: 2003-01-28
Classification: B62M

Abstract:
A snowmobile, comprising:a frame; an engine disposed on the frame; at least one ski disposed on the frame; a seat disposed on the frame; a steering device disposed on the frame forward of the seat, the steering device being operatively connected to the at least one ski for steering the snowmobile; and a drive track disposed below the frame and connected operatively to the engine for propulsion of the snowmobile, the drive track, comprising an endless body having a ground-engaging outer surface with a central portion flanked by first and second lateral portions, a plurality of longitudinally spaced reinforcing rods disposed in the body along a transverse direction of the body, the rods defining a plurality of pitches, a plurality of profiles projecting from the outer surface of the body along the plurality of pitches, and a plurality of non-profile regions defined along the plurality of pitches, wherein the profiles and profile-free regions define a pattern for each pitch, wherein pitch patterns between successive twosomes of pitches differ, wherein pitch patterns between successive threesomes of pitches differ, wherein pitch patterns of successive sixsomes of pitches are identical, wherein the profiles define a height profile that varies between the first and second lateral portions, wherein each profile has a height of not less than about 1Â¼ inches, and wherein the drive track has a length greater than about 141 inches.