Back to results
US 6,854,669 B2Granted
Spraying equipment
OwnerIan Michael Anthonyinventor
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
OwnerIan Michael Anthonyinventor
Estimating the term…
Liquid spraying equipment, for example for paint, adhesives and chemicals, comprises a spray gun (30) having a luid outlet (53) to which liquid is pumped from a container, the outlet being adjaceent a pressurized air or other fluid outlet (34) to entrain the liquid and thereby atomize it. The liquid pump is housed in a separate unit of which a removable liquid container can be sealingly coupled. The unit also contains a pump to deliver pressurized air to a chamber with a hose ocnnection to the spray gun and with a tapping to the liquid container so as to pressurize the liquid and assist the liquid pump to deliver it to the spray gun through a pipe, possibly within the pressurized air hose. The flow of liquid through the outlet is regulated by a pin (38) or the like slidably mounted in a bore (35). A trigger mechanism (36) retracts the pin from the outlet against the force of a restoring spring (40). An adjustable limit stop (49) determines the degree of opening of the liquid outlet. The system is particularly suitable for for viscous material, such as emulsion paints, which cannot readily be drawn into a conventional spray gun.
Spraying equipment comprising a spray head, container for liquid to be sprayed, pumping means for pumping liquid from said container to a liquid outlet adjacent at least one pressurised air outlet nozzle provided in said spray head, and pressurised air generating means for delivering a flow of pressurised air through said at least one air outlet nozzle so as to entrain liquid delivered by said pumping means to said liquid outlet, thereby to atomize said liquid, characterised in that the pumping means comprises feed screw adapted to extend into said liquid container and coupled to drive means for driving said feed screw.
Dependencies are inferred from the claim text.