Conveyor roller with chain attachment link

A conveyor roller assembly for pushing an object along a longitudinally slotted track comprising

• a bar having front and back ends and adapted to extend through the longitudinal slot in the track with its front end disposed beneath the track and its back end disposed above the track,
• a pair of roller sub-assemblies attached to the back end of the bar, one of said subassemblies positioned to ride upon and follow the upper surface of the track and the other subassembly positioned above the track to engage and push the object along the track,
• and a linkage assembly attached to the front end of the bar for connecting the roller subassemblies to a chain conveyor disposed beneath the track and for maintaining longitudinal alignment of the roller subassemblies on the track, said linkage assembly including
• an axle immovably secured to the front end of the bar and perpendicular to the longitudinal center line of the bar and extending transversely across and beyond the sides of the bar
• a pair of links each having holes for receiving the axle, one on each side of the bar,
• rigid sleeves connected to each of the links and axially aligned with the holes in the links, said sleeves having inner diameters with a close tolerance with respect to the diameter of the axle and disposed one on each side of the axle and extending away from the bar,
• rollers for tracking the bottom surface of the track and mounted one on each sleeve by means of an axial opening through each roller, said roller and openings and sleeves having a close tolerance fit with respect to one another,
• and means provided on the rollers for preventing the rollers from engaging the links.