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US 2003/0146304 A1Published application
Spraying equipment
OwnerIan Michael Anthonyinventor
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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 pressurised air or other fluid outlet (34) to entrain the liquid and thereby atomise it. The liquid pump is housed in a separate unit ot which a removable liquid container can be sealingly coupled. The unit also contains a pump to deliver pressurised air to a chamber with a hose ocnnection to the spray gun and with a tapping to the liquid container so as to pressurise the liquid and assist the liquid pump to deliver it to the spray gun through a pipe, possibly within the pressurised 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 means for liquid to be sprayed, pumping means for pumping liquid from said container means 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 atomise said liquid, characterised in that the pumping means comprises feed screw means adapted to extend into said liquid container means and coupled to drive means for driving said feed screw means.
Spraying equipment as claimed in any preceding claim, wherein said liquid container means, pressurised air generating means and pumping means are mounted in a housing separate from said spray head, said housing also having an air inlet adapted to supply air to said pressurised air generating means, a chamber for receiving pressurised air from said pressurised air generating means, and a pressurised air outlet connected to said chamber and adapted to be coupled to said spray head.
Spraying equipment as claimed in any preceding claim, wherein control means are provided on said spray head to regulate the flow of liquid to said liquid outlet.
A pressurised fluid operated spray device adapted to be connected to a source of pressurised fluid and to a liquid adapted to be pumped to a liquid outlet located adjacent a pressurised fluid outlet provided in the spray device, an obturating member movably mounted in the device between liquid outlet open and closed positions in response to operation of a trigger mechanism effective to move the obturating member from said closed position to said open position.
Pressurised fluid operated liquid spraying equipment comprising a housing incorporating a removable container for liquid to be sprayed, pumping means for delivering liquid in said container to a liquid outlet, pressurised fluid generating means providing a source of pressurised air at a pressurised air outlet, said housing further having means whereby said liquid outlet and said pressurised air outlet may be connected to a spray device such that pressurised air delivered by said pressurised air generating means can entrain liquid pumped by said pumping means whereby to atomise said liquid.
Dependencies are inferred from the claim text.