Patent ID: 6113003
Filing Date: 2000-09-05
Classification: B05B

Abstract:
A hand-held compressed air duster apparatus comprising:a pressurizable vessel for containing a fine particulate dusting material, said vessel having a bottom and an upper shoulder provided with a sealable top opening;a hand pump mounted within said vessel and sealably connected to said top opening, said pump comprising an external handle connected to a piston extending into said vessel;a dust discharge outlet disposed on said shoulder of said vessel;two concentric tubes disposed within said vessel:a rotatable outer tube having an outer surface and a closed lower end provided with a pivot foot in contact with the bottom of said vessel, said outer tube extending upwards to an open upper end in fluid communication with the interior of said vessel; said rotatable outer tube comprising a dust feed agitator pin extending outwardly from the outer surface of said tube; said rotatable outer tube further comprising a venturi disposed above and in close proximity to said dust feed control pin and an agitator weight mounted on the outer surface of said tube above said venturi; andan inner tube having a open bottom end and an upper end connected to said dust discharge outlet;wherein actuating said pump by operating said handle pressurizes said vessel, and manually shaking said vessel imparts motion to said agitator weight and said dust feed agitator pin attached to said rotatable outer tube, thereby maintaining the venturi open to the entry of fluidizable dust particles proximate said open venturi, and enabling discharge of fluidized dust from said discharge outlet.