Patent ID: 7550021

Claim:
Portable dust collection unit comprising A base supported on a plurality of wheels; A vertical pipe rising from the base, including an intake duct that enters said pipe; A head portion mounted at an upper end of the vertical pipe; including a fan chamber centered on an axis of said pipe, and having a centrifugal impeller therein; and a generally cylindrical cyclonic intake chamber at one side of said fan chamber to receive an air flow from said fan chamber; A cyclonic separator including a conic member below said cyclonic intake chamber and coaxial therewith; and a vertical vortex pipe positioned on the axis of the conic member and extending up across said cyclonic intake chamber; A dust collection drum positioned on said base below said cyclonic separator; A dust conduit connecting a nose of said conic member with said drum; and A filter member positioned above the head portion to filter air discharged through said vortex pipe.