Patent ID: 8029590

Claim:
A collapsible filtration tank for a dust collector, said collapsible filtration tank comprising: an outer frame formed cylindrical and provided with a plurality of meshes formed in its circumferential wall; a chamber surrounded by said circumferential wall of said outer frame; an opening formed at a bottom of said chamber; a combining flange radially formed around said opening; an engaging base formed annular and installed around said opening of said outer frame and provided with an annular blocking edge radially and horizontally extended inwards from an intermediate portion of its inner wall; said annular blocking edge being fixed with said combining flange of said outer frame; a filter inserted in said chamber of said outer frame and restrictively blocked by said blocking edge of said engaging base; said engaging base is provided with a positioning bar diametrically fixed across said blocking edge; said collapsible filtration is further provided with a cleaning device that further consists of a guiding supporter; a brush base and a dragging member; said guiding supporter inserted inside said filter and provided with a bottom supporting rod fixedly screwed together with said positioning bar of said engaging base; a central guiding rod fixed with said bottom supporting rod and fixed at a preset position of said outer frame; said brush base mounted on said central guiding rod and provided with a plurality of brushes fixed around its outer circumference and fitted inside said filter; and said dragging member provided with a dragging rope connected with said brush base and wound inside and outside said outer frame.