Abstract: A device for mixing compressed air and abrasive and providing the air/abrasive mixture to a delivery gun for use in artistic abrasive blasting. The device is provided with a vessel having an upper chamber for holding abrasive. Compressed air is supplied to a head space located in the upper chamber above the abrasive. An air delivery line extends from the head space to a mixing chamber located below the upper chamber in order to supply compressed air thereto. An adjustable mixing valve admits abrasive from the upper chamber into the mixing chamber where the abrasive is mixed with the compressed air before it exits the mixing chamber on its way to the delivery gun.

Abstract: A device for use with artistic sandblasting. The device is a hand-held gun which receives an air/abrasive mixture via a flexible tube which enters the gun through a rear end of the gun. The tube extends through the gun's rear end, between a pinch point and a curved end of an adjustable, spring biased pivotal lever provided internally in the barrel of the gun and attaches to a nozzle removably provided at the front end of the gun. When the trigger is not depressed, the curved end of the lever is biased toward the pinch point, thus squeezing the tube and cutting off flow of the air/abrasive mixture through the gun. The air/abrasive mixture flows through the gun via the tube and out the nozzle when a trigger which is attached to the curved end of the pivotal lever is depressed toward a handle provided on the rear end of the gun and thereby moves the curved end of the lever away from the pinch point, allowing the tube to resume its original unsqueezed configuration.