Patent ID: 8272701

Claim:
A track assembly, comprising: a track chain link having a longitudinal (or “x”) dimension and a lateral (or “y”) dimension, the track chain link having an x-y plane of symmetry about which the track chain link is symmetric such that the track chain link is invertible relative to the x-y plane of symmetry between a first use orientation and an opposite, second use orientation, the track chain link comprising a peripheral and wearable first rail surface and a peripheral and wearable second rail surface, the first and second rail surfaces extending longitudinally of the track chain link and positioned to opposite sides of the x-y plane of symmetry, a ground-engaging shoe, and a coupler attaching the shoe to the track chain link selectively to either side of the x-y plane of symmetry, the coupler comprising a seat that is mounted on the track chain link and is separate from the first and second rail surfaces and on which the shoe is mounted in the first and second use orientations of the track chain link, wherein the track chain link comprises an anchor positioned on the x-y plane of symmetry, the seat is positioned on the anchor between the anchor and the shoe and is re-positionable between opposite sides of the anchor to accommodate inversion of the track chain link, the coupler comprises a fastener fastening the shoe to the anchor, the anchor comprises a boss that protrudes laterally from a lateral side wall of the track chain link in a lateral direction and receives the fastener such that the fastener fastens the shoe to the boss, the seat is positioned on a ledge of the boss, the fastener is a first fastener, the boss is a first boss, the coupler comprises a second fastener, the anchor comprises a second boss that protrudes laterally from the lateral side wall of the track chain link in the lateral direction and receives the second fastener such that the second fastener fastens the shoe to the second boss, and the seat is positioned on a ledge of the second boss.