Wheel substitutes for land vehicles – With interposed friction drive belt
Patent
1979-09-04
1981-07-14
Marmor, Charles A.
Wheel substitutes for land vehicles
With interposed friction drive belt
305 35R, 305 54, B62D 5524
Patent
active
042783020
ABSTRACT:
A grouser bar track assembly for a snowmobile that includes a central and two outer continuous belt members are spaced apart in a direction transverse to the length of the belts so as to define a pair of parallel grooves extending around the assembly. There is provided a series of transversely extending grouser bars fixed to and projecting outwardly from the external surfaces of the belts so as to extend across the grooves between the respective adjacent edges of the central and outer belts. Each of the grouser bars have built-in flex points and each of the flex points of adjacent bars are offset in a transverse direction from those of the adjacent bars. Transversely extending surface lugs project from the outer surface of the respective belts and are in advance of and closely adjacent the flex point of the next adjacent grouser bar. The lugs offer a transverse stiffness at the flex point. The surface lugs project out further than the outer extremities of the grouser bars and are the primary contact points between the entire assembly and the ground or snow surface.
REFERENCES:
patent: 3694040 (1972-09-01), Hallaman
patent: 3758170 (1973-09-01), Mazurek
patent: 3765731 (1973-10-01), Kilbane, Jr.
patent: 3930689 (1976-01-01), Maki
Scholten Stephen C.
Westimayer David A.
Deere & Company
Marmor Charles A.
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