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A portable paint spraying device for generating a paint spray by centrifugally impelling liquid paint from the edge of a vertically oriented spinning disc. The disc is driven by an electric motor which also drives a conveyor screw used to lift the paint upwardly from a reservoir or container through

A portable paint spraying device for generating a paint spray by centrifugally impelling liquid paint from the edge of a vertically oriented spinning disc. The disc is driven by an electric motor which also drives a conveyor screw used to lift the paint upwardly from a reservoir or container through a vertically oriented pump tube and into a spray chamber in the sprayer housing. The pump tube has a horizontal portion at the upper end thereof terminating in a delivery orifice through which the liquid paint is discharged into a centrally located recess or well in the front face of the disc. The disc has a relatively large flat annular region surrounding the central well which is in turn surrounded by an outer peripheral angled flange or lip having a feathered edge. The spray dispersion pattern is defined by a vertically oriented spray discharge slot in the pump housing, a movable shutter between the spray discharge slot and disc, and a series of baffles within the spray chamber which also assist in returning excess liquid to the paint reservoir. The amount of paint exiting from the paint sprayer may be controlled by controlling the amount of overlap between the movable shutter and spray discharge slot; also by diverting a portion of the paint which is lifted by the conveyor screw back to the reservoir instead of delivering same onto the sprayer disc.

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A portable pump spraying device comprising a container for the liquid to be sprayed, a sprayer housing connected to said container, said housing containing a spray chamber having a vertically oriented spray discharge slot, a vertically oriented spinner disc in said spray chamber, pump means for pump

A portable pump spraying device comprising a container for the liquid to be sprayed, a sprayer housing connected to said container, said housing containing a spray chamber having a vertically oriented spray discharge slot, a vertically oriented spinner disc in said spray chamber, pump means for pumping the liquid to be sprayed from said container onto said spinner disc, said pump means including a lower generally vertical pump tube portion extending into said container, a conveyor screw coaxially and rotatably disposed within said lower pump tube portion, and an upper pump tube portion having a right angle bend extending generally perpendicular to the spinner disc axis, drive means for rotating said spinner disc, and a flexible torsion-resistant transmission shaft drivingly axially connecting said spinner disc and said conveyor screw through said upper and lower pump tube portions, said upper pump tube portion having a delivery orifice opening toward the face of said spinner disc for delivering the pumped liquid onto said spinner disc, the rotation of said spinner disc being operative by centrifugal force to form a spray from the liquid delivered thereto and impel a portion of the spray through said spray discharge slot.