Truck mounted vacuum loading apparatus

A mobile loading apparatus adapted to be mounted on the bed of a conventional pick-up truck, said apparatus comprising:

• an enclosed primary particulate settling chamber having a particulate air inlet in one wall for receiving a flow of particulate-laden air and a particulate collecting bin in the bottom of the chamber;
• an enclosed secondary settling and filter chamber having a separating wall common with the settling chamber and a downwardly sloping floor in open communication with said particulate collecting bin;
• a pair of substantially parallel vertically spaced particulate air transfer passages in said common separating wall, the lower of said air passages defining the open communication between said floor and said collecting bin;
• a filter unit mounted in the filter chamber and having an outer particulate filter media of a pleated construction disposed with its outer surface exposed to the particulate-laden air, and an interior clean air chamber having an open end connected to a clean air plenum;
• a diametrically disposed impervious separator dividing each clean air chamber into a plurality of sub-chambers each opening into said clean air plenum;
• a compressed air nozzle disposed in the clean air plenum adjacent each sub-chamber opening;
• a source of compressed air operatively connected to said nozzles;
• and,
• control means for sequentially directing a back flush jet of compressed air from a nozzle into an adjacent sub-chamber.