摘要 |
An expandable and retractable ramp assembly for conveying moving objects onto a cargo carrying surface of a cargo transporting apparatus comprising: a. a pair of opposed, parallel scissors assemblies, with each scissors assembly including a plurality of scissors link members pivotally attached to other scissors link members of the same scissors assembly. A plurality of tread support assemblies, extend between and are pivotally attached to one of the scissors link members of each opposed scissors assembly. Each tread support assembly is constructed of a plurality of support members pivotally attached to the scissors link members of each opposed scissors assembly. Each tread support assembly supports at least one tread plate. In an embodiment, each slidable mounting bracket includes a compressible cushion member that prevents the ramp from reaching a flat or over-center position when in the expanded position.
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