Patent ID: 7455173

Claim:
A portable telescoping stacking conveyor for stockpiling bulk particulate materials comprising: (a) an undercarriage comprising a plurality of transport wheels, a plurality of radial travel wheels, and means for selectively bringing the transport wheels and the radial travel wheels into contact with the ground; (b) a primary conveyor frame having a front end and a rear end; (c) a secondary conveyor frame that is receivable by the primary conveyor frame and moveable with respect thereto between a retracted position and an extended position, said secondary conveyor frame having a front end, a rear end, a left secondary top chord and a right secondary top chord; (d) a secondary conveyor frame support assembly that is mounted on the primary conveyor frame and adapted to bear against the left secondary top chord and the right secondary top chord; (e) a base frame having a king pin for engagement with a tow vehicle; (f) means for moving the secondary conveyor frame with respect to the primary conveyor frame between the retracted and the extended positions; (g) a first roller disposed near the top of the front end of the primary conveyor frame; (h) a second roller disposed near the top of the rear end of the secondary conveyor frame; (i) a third roller disposed near the bottom of the front end of the secondary conveyor frame; (j) a fourth roller disposed near the bottom of the rear end of the primary conveyor frame; (k) an endless belt that is supported by the first, second, third and fourth rollers when the secondary conveyor frame is in both the retracted and extended positions; (l) a belt drive assembly that is adapted to drive the endless belt; wherein the primary conveyor frame is arranged, configured and adapted to support the secondary conveyor frame only by supporting the left secondary top chord and the right secondary top chord.