Spray gun
OwnerRobert H. Greene, Andrew I. Cliffe +1inventors
InventorsRobert H. Greene, Andrew I. Cliffe, Karl B. Hunziger
Life of this patent
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Abstract
The invention provides an electrostatic spray gun including a replaceable fluid container a nozzle outlet, apparatus for applying high voltage to the liquid and a spring loaded trigger piston for pressurizing the liquid through the outlet. The piston has axially inner and outer parts for forming a lubricant chamber therebetween. The lubricant seals the paint forward of the piston during pressurization and prevents the piston from being locked up during reciprocation.
Claims16
An electrostatic spray gun comprising a housing with a replaceable fluid container, a forward part from which fluid is to be sprayed, means for expelling fluid from the container, and a high voltage generator for applying electrostatic potential to the fluid to form an electrically charged atomised spray, characterized in that the container is rigid and fluid is expelled from it through a nozzle, for generation of the spray, by a piston within the container the piston having axially inner and outer parts with a fluid lubricant seal provided between them.
A container of fluid for electrostatic spraying, for replaceable reception in an electrostatic spray gun having a housing for the container, a forward part from which the fluid is to be sprayed, means for expelling fluid from the container, and a high voltage generator for applying electrostatic potential to the fluid to form an electrically charged atomised spray, characterized in that the container is rigid and contains a piston disposed to receive when in place in the gun mechanical pressure to expel the fluid through a nozzle for generation of the spray, the piston having axially inner and outer parts with a fluid lubricant seal between them.
Dependencies are inferred from the claim text.