LIFTING LOADING PLATFORM
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United States of America Patent
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Issued Date -
Nov 17, 2011
app pub date -
Sep 8, 2009
filing date -
Sep 16, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Tailgates for trucks have a loading platform which can be lifted and lowered and pivoted by a lifting mechanism. The lifting mechanism has hydraulic cylinders for lifting and lowering and pivoting the loading platform. The hydraulic cylinders require a hydraulic subassembly and comparatively thick hydraulic lines in order to operate. The invention provides a tailgate in which the loading platform is raised, lowered and pivoted by electric linear drives (20). The linear drives (20) are provided in a particular manner with a plurality of rod-like electric motors (25) which together drive a gearwheel (32). The gearwheel (32) can rotate a spindle nut (24) on a threaded spindle (23). The threaded spindle (23) can thus be displaced axially like piston rods of hydraulic cylinders. As a result of the electrically operating linear drives (20), the tailgate according to the invention does not need any hydraulic subassembly or any hydraulic hoses.
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