Patent ID: 8500520

Claim:
A system for removing a coating from a substrate, the system comprising: a particulate cleaning medium source for providing a particulate cleaning medium; a compressed air source for providing compressed air; a water source for providing water; a mixing valve having a particulate cleaning medium input coupled with the particulate cleaning medium source, a compressed air input coupled with the compressed air source, a water input coupled with the water source, and an output; a mixing chamber housed within the valve for mixing of the particulate cleaning medium, the compressed air, and the water so as to provide a coating removal mixture, the mixing chamber being fluidly connected to the particulate cleaning medium input, the compressed air input, the water input, and the output; and a delivery conduit coupled with the output for carrying the coating removal mixture toward the coating and substrate, wherein the mixing valve is configured such that the water is received in the mixing chamber downstream of where the compressed air is received in the mixing chamber, and the particulate cleaning medium is received in the mixing chamber downstream of where the water is received in the mixing chamber.