Abstract: A seat support for use with a vehicle seat and configured to engage a track on the floor of the vehicle. The track including two inwardly-directed lips on opposed sides of a slot, the lips providing first alternating protrusions, a spacing distance apart, and recesses along the length of the track. The seat support having an elongate main body and including an interface portion having second alternating protrusions and recesses. The second protrusions are spaced apart by the same spacing distance as the first protrusions. The seat support includes first and second bracing members and a locking arrangement. The locking arrangement configured to restrain the longitudinal movement of the seat support when engaged.

Abstract: A carriage adapted to be slidably mounted on a track comprises a main body having a pair of retaining elements adapted for lateral movement therein. Each turning element is biased inwardly to allow the carriage to be mounted on and removed from a channel formed in the track. A pivotally mounted knife element is adapted to engage each retaining element thereby moving the retaining element outwardly to a position in which they engage the side edges of the channel formed in the track, thereby securing the carriage to the track.