Patent ID: 6568836
Filing Date: 2003-05-27
Classification: F21V,F21W,Y10S

Abstract:
In an equipment mounting system, including a pair of spaced, parallel tracks, a carriage, a plurality of rollers rotatably mounted on said carriage and in rolling engagement with said tracks to suspend said carriage from said tracks for rolling movement therealong, the improvement comprising:at least one of said rollers being concave and formed from a relatively hard material, said concave roller engaging one of said tracks, said track engaged by said concave roller being configured complementarily to the concavity of said concave roller to resist side loads on said carriage, and others of said rollers than said concave roller being formed of a relatively soft material and providing light frictional resistance to movement of said carriage along said tracks; thereby inhibiting drift, over-travel and inadvertent movement thereof.