Retractable load booster assembly for large cargo trucks

摘要: A retractable load booster assembly for use rearwardly of a large cargo truck to increase the carrying capacity and including sensing means activating air spring suspension after reaches departs from its extended operating position. The power is energized by hydraulic fluid stored in accumulator an driven pump supplied only there adequate supply meet needs other air-operated auxiliaries. control includes foolproof provision assuring retraction before backing cushioning suddenly applied stresses without need unloading or wasting bellows. Various auxiliaries governing operation are mounted on strong frame securable as unit midlength chassis strengthen it avoid costly strengthening changes.