Importance

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Abstract

A vacuum loading apparatus is adapted to be mounted on the bed of a conventional pick-up truck and includes a primary particulate settling chamber and an integrally attached filter chamber having open communication with the settling chamber through a common separating wall. A pair of cylindrical filter units are mounted in the filter chamber, each filter unit has a pleated filter media disposed with its outer surface exposed to the particulate-carrying air. The open interior of the filter unit, comprising a clean air chamber, is divided into two sub-chambers by an impervious axially disposed separator and a compressed air nozzle is disposed adjacent the opening to each sub-chamber to direct a backflush jet of compressed air through the filter media to clean the entrained particulates therefrom. An appropriate control system sequentially operates the compressed air nozzles to clean one filter sub-chamber at a time and the cleaning process may be carried out concurrently with normal filtering operation of the unit.

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First Claim