Patent ID: 7125317

Claim:
A method comprising: attaching an air supply to a longitudinal passage in a manifold assembly, the manifold assembly comprising a plurality of outlet passages and a plurality of material passages, the plurality of outlet passages being serially connected to the longitudinal passage, wherein each of the plurality of outlet passages are oriented in a different direction relative to a remainder of the outlet passages; providing a supply of abrasive material; attaching a respective first end of a plurality of material supply hoses to a corresponding plurality of material passages, each material passage of the plurality of material passages being in fluid connection with a corresponding outlet passage of the plurality of outlet passages, wherein each material passage intersects the corresponding outlet passage at an angle to generate a venturi effect; coupling the material supply hoses to the abrasive material supply at a respective second ends of the material supply hoses; pressurizing the manifold assembly with the supply of air; and sandblasting an article by drawing abrasive material through the hoses and out of the plurality of nozzles using the pressurized air.