MOTORIZED LIFT ASSEMBLY FOR RACKS USED WITH FLAT BED TRUCKS AND TRAILERS

摘要

A lift assembly that can be reversibly installed in the bed of a pick-up truck or other flat bed transport means. At least four telescoping support legs are disposed at the four corners of the truck bed and support the upper rails on which the load is placed. The support legs are made up of a series of nested threaded segments driven by a similarly threaded drive shaft. A reversible motor associated with each support leg enables the segments to rotate in a forward direction to raise the load and to rotate in the reverse direction to lower the load. The motors are activated simultaneously and powered by the truck battery. The raising and lowering motion is smooth and continuous and can be stopped at any desired height. The lift assembly enables the height of the load to be easily changed by one person without any disturbance or shifting of the load. Telescoping braces are available to stabilize the support legs when fully extended and protective sleeves can be used to eliminate damage to the mechanism from environmental contaminants.