| 摘要 |
A portable conveying device comprising an inclining base having a conveyor belt, a plurality of articulating conveying elements having powered cargo rollers defining a conveying device transport plane, the conveying elements extendable from and retractable into the base by drive means. The drive means may include a pair of spaced-apart spur gears which have teeth that engage with rack teeth of the conveying elements. The conveying device may include a hollow universal joint having axes of rotation lying substantially in the same plane.
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