Patent ID: 8348295
Filing Date: 2013-01-08
Classification: B62K

Abstract:
1. A two-wheeled vehicle frame equipped with rear suspension and including: a front chassis equipped with a bottom bracket wheel, and a rear oscillating assembly equipped with a rear drive wheel, with said rear oscillating assembly being attached to said front chassis by a shock-absorber system having a top connecting point and a bottom connecting point, by a top pivoting link having a top pivot point and a bottom pivot point, and by a bottom pivoting link having a rear pivot point and a front pivot point, wherein: the top connecting point connects said shock absorber system to said front chassis, the bottom connecting point connects said shock absorber system directly to said rear oscillating assembly, the top pivot point connects said top pivoting link to said front chassis, the bottom pivot point is located on the rear oscillating assembly and connects said top pivoting link directly to said rear oscillating assembly, the rear pivot point connects said bottom pivoting link to said front chassis, the front pivot point connects said bottom pivoting link to said rear oscillating assembly, wherein the top pivot point is distinct from the top connecting point, and wherein, during the compression of said shock-absorber system, said top pivoting link oscillates, in relation to said chassis, about an axis that is substantially perpendicular to a chain line, and the trajectory of a point of intersection between a first straight line passing through the two top and bottom pivot points and a second straight line passing through the two rear and front pivot points moves from the rear toward the front of said vehicle within a band that is substantially parallel to and at a minimum distance from said chain line, and wherein the intersection point between the first straight line passing through the two top and bottom pivot points and the second straight line passing through the two rear and front pivot points, remains behind the axis of the bottom bracket wheel during at least the 25% of the compression of the shock-absorber system.