Spray gun paint cup and lid assembly

A paint spray gun and paint cup and lid assembly for operation from a source of compressed air comprising, in combination, a spray gun having a threaded nipple and a suction paint feed tube extending from said nipple and connected to supply paint to a nozzle, a paint cup defining an open top and having a threaded end surrounding said open top, means attaching said paint cup to said spray gun with said paint feed tube extending into said paint cup including a shroud having a first end adapted to fit over said nipple and to abut the spray gun, said shroud having a second end threaded to engage said threaded paint cup end, a retainer having an internally threaded first end engaging said threaded nipple to retain said shroud on said spray gun, means cooperating between said spray gun and said shroud for indexing said shroud in either a first position or a second position relative to said spray gun, means for supplying compressed air from said spray gun to the interior of said paint cup to pressurize said paint cup when said shroud is in said first position, and means on said shroud for blocking the supply of compressed air from said gun to said paint cup and for simultaneously venting the interior of said paint cup to atmosphere when said shroud in in said second position.