Portable abrading cabinet device for recycling abrasive blasting system

Claim 1

In an abrasive blasting system including an abrading device having a canister containing a supply of abrasive material and having an outlet at the bottom thereof, a source of vacuum connected to the canister and applying a negative pressure to the upper surface layer of said abrasive material, a gun having a barrel for directing abrasive material in the direction of a surface area to be abraded and having a passageway therethrough, a source of positive pressure air connected to one end of said gun passageway, a first conduit connected to the canister above said abrasive material for returning abrasive material and abraded debris to the canister, a second conduit having a first end portion connected to the canister outlet and a second end portion connected to said gun passageway downstream of the connection of said source of positive pressure to said gun, and means for causing abrasive material to flow toward the gun in said second conduit, a portable abrading cabinet device in which an abrasive blasting operation is performed on articles to be abraded, comprising: a cabinet housing of cup-shaped configuration formed from a rear end wall and a skirt-like peripheral sidewall secured together to provide a forward open end portion and to afford an inner blasting chamber within the housing; aperture means in the cabinet housing of a size to accommodate the gun barrel for pivoting movement to direct abrasive toward the work surface; a transparent window member mounted in the cabinet housing for viewing the inner blasting chamber and the work surface during the blasting operation, the window member being spaced upwardly from the aperture means; exhaust outlet means in the cabinet housing adapted to be connected to the first conduit for removing abrasive material and abraded debris from the blasting chamber, said exhaust outlet means being positioned below said aperture means; a seat member extending peripherally of the forward open end portion of the housing; and a resilient peripheral sealing means secured to the seat member, the sealing means projecting forwardly of the seat member to provide sealing engagement with a work surface to be abraded when the first conduit is exhausting air from the inner blasting chamber.