Trackway for overhead transportation system

A trackway for an overhead transportation system of the general class comprising at least one car as a vehicle means depending from and longitudinally traversible along a trackway that is located above the earth's surface including a series of spaced pillars and each pillar having a post depending downwardly therefrom along a vertical post-axis, said transport system trackway comprising:

• A. a pair of substantially parallel and co-elevational tubular conduits attached to a series of pillar posts and located on opposite sides of the vertical post-axis, the upper-hemiside of each conduit being longitudinally slottedly vented therethrough;
• B. a pair of protective shields attached to the respective pillar posts and located on opposite sides of the vertical post-axis, each of said protective shields being longitudinally coextensive along and protectively overlying the upper-hemiside vent slots of the respective tubular conduits;
• C. at least one lubeline coextensive along the outerwall of the respective tubular conduits and having serially spaced nozzles for high-pressure injection of lubricant fluid from each nozzle-station toward the conduit innerwall and operatively synchronizeable with the approaching vehicle;
• D. a troughline coextensive along the lower-hemiside of and communicating with the innerwall of the respective tubular conduit for collection of the lubricant;
• and
• E. means for recycling the lubricant fluid from the troughline back to the lubeline, said recycling means including a lubricant reservoir along the troughline and pump means for reintroducing the lubricant under high pressure into the lubeline.