부산대학교 도서관

The patent describes a self-containing dust collector comprising: a support frame; a housing mounted on the frame having partition means dividing the housing into a dirty air chamber having a dirty air inlet and a clean air chamber having a clean air outlet. A partition means has an aperture connecting the dirty air chamber in air flow communication with the clean air chamber; a filter means operatively mounts across the aperture; means for circulating dirty air through the dirty air inlet, into the dirty air chamber, through the filter means into the clean air chamber and the clean air outlet; a hopper mounted on the frame in dust receiving relation to the filter means has a first opening constituting a dust discharge port; and a dust storage receptacle spaced from the dust discharge port. It has a wall means defining a second opening constituting a dust receiving port. The improvement comprises a quick release adapter duct movable to either an open nonduct forming position or a closed duct forming position relative to the storage receptacle.