Abstract: A drive sprocket assembly for driving an endless chain assembly for propelling a vehicle has multilayered flexible teeth in which each layer is separately deflectable upon impact by a bushing of the endless chain assembly. The independent flexibility of each tooth in the multilayered structure is less than that of a single wide monolithic tooth and, as a result of expected variance due to acceptable manufacturing tolerances in tooth profiles and web shapes, the impacts of the track bushing do not occur simultaneously. The track bushing first engages one or more of the teeth in the multilayered tooth structure, whereupon the first impacted teeth absorb at least a portion of the kinetic energy prior to the bushing impacting the remaining teeth in the multilayered structure.

Abstract: A track assembly includes a frame. The track assembly also includes a drive wheel and an idler wheel rotateably secured to the frame. The track assembly further includes an endless belt having an inner surface and an outer surface. The endless belt is disposed around the drive wheel and the idler wheel. The track assembly also includes a guide block secured to the inner surface of the endless belt. The track assembly further includes a first roller rotateably secured to the guide block.

Abstract: In one embodiment of the present invention, a protective cover member for a guide block on a drive belt includes an inner portion shaped to substantially conform to at least a portion of the outer surface of the guide block. The cover member is attached to the guide block using suitable attachment means such as bonding the cover member to the guide block, mechanical fasteners such as screws or bolts, and/or using an interference design whereby the cover member is retained by frictional forces or by snapping around a portion of the guide block. The outer surface of the cover member is shaped and sized to be engaged by drive members associated with a drive wheel. The cover member may be constructed of material that is capable of withstanding higher temperatures and forces compared to the material of the guide blocks.