Patent ID: 7922107

Claim:
A spray gun with a paint cartridge chamber comprising, a hinge connecting a front portion of the spray gun with a rear portion of the spray gun which allows the paint cartridge access to the paint cartridge chamber when the hinge is in the open position and locks the paint cartridge in the paint cartridge chamber when the hinge is in the closed position, the paint cartridge having a needle valve assembly extending through the cartridge and adapted to connect to a trigger on the rear portion of the spray gun when the hinge is in the closed position, the needle valve assembly having an apex for engaging an aperture in a nozzle on the paint cartridge for allowing paint to flow out when the needle valve assembly is withdrawn from the aperture, a tubular connection from the paint cartridge to a paint supply, a spray head assembly on the spray gun adjacent the aperture on the nozzle to deliver an air stream when the trigger moves the needle valve assembly in the paint cartridge to open the aperture for entraining paint from the nozzle, a latch on the spray gun for locking the front portion of the spray gun to the rear portion of the spray gun in the closed position for securing the paint cartridge in place in the paint cartridge chamber.