Abstract: A liquid dispensing gun wherein a spray pattern control valve is located internally of the gun. The spray pattern control valve is in the form of a two position air flow valve movable between a first position wherein low air flow is supplied through the valve to a second position wherein high air flow is provided through the valve. The valve has two adjustable stops operable to fix the low air flow and the high air flow positions of the valve. Manual pressure on the stem of the valve controls movement between the two positions.

Abstract: A method and apparatus for replacing spent dielectric material at the high-valued resistor in an electrostatic spray gun, having an insulating tube disposed within a bore formed in the gun barrel which receives the resistor encapsulated with spent dielectric material, comprises the steps of inserting a syringe apparatus into the insulating tube, dispensing new dielectric material contained within the syringe into the insulating tube while withdrawing the syringe therefrom, and then inserting a high voltage cable into the insulating tube to force the new dielectric material ahead of the cable. The new dielectric material encapsulates the resistor and forces the spent dielectric material between the insulating tube and gun barrel bore away from the resistor.