Patent ID: 6904986
Filing Date: 2005-06-14
Classification: B62D

Abstract:
1. An endless track assembly for a vehicle comprising: a) a frame including a drive aperture; b) first and second suspension arms mounted to pivot from said frame and each supporting an axle; c) a plurality of idler wheels mounted to said frame and wherein a first idler wheel is mounted to the axle of said first suspension arm and a second idler wheel is mounted to the axle of said second suspension arm, wherein a linkage arm is coupled between said first and second suspension arms, and wherein a spring is mounted to bias movement of said linkage arm, such that a pivotal movement of either of said first and second idler suspension arms is resiliently opposed or assisted by said spring as the other of said first and second idler wheels attempts to follow; d) a drive sprocket mounted to said drive aperture; and e) an endless track trained under tension around said drive sprocket and said plurality of idler wheels and exhibiting a longitudinal profile, whereby undulations in the terrain are followed by pivotal rotation of said idler wheels to vary the longitudinal profile, without affecting track tension, to complement the undulations.