Patent ID: 8833263
Filing Date: 2014-09-16
Classification: B61B,F16C

Abstract:
1. A track system of the kind which includes a track having a combination of straight and curved portions or curved portions with different radii of curvature and one or more carriages having bearing wheels engaged with the track such that the carriages can travel along the track, in which the carriages have a single bearing wheel engaged with one side of the track and a pair of bearing wheels engaged with an opposite side of the track, in which, all of the bearing wheels are mounted in fixed positions against movement relative to the carriage, including against movement toward and away from the opposite sides of the track, and in which the width of the track between the said opposite sides varies such that the curvature of both sides changes smoothly without abrupt changes in radius such as to maintain a close tolerance between the bearing wheels and the respective sides of the track.