An improved spray gun assembly includes a fluid supply container connected to a spray gun and a manually operable trigger for actuating the spray gun, in combination with a motor driven agitator for automatically agitating the fluid contents of the supply container. The agitator is driven by an air motor,...http://www.google.fr/patents/US4401268?utm_source=gb-gplus-shareBrevet US4401268 - Spray gun with paint agitator
