Patent ID: 6918551

Claim:
A coating material dispensing system including a coating dispenser, a high-magnitude potential supply to provide charge to the dispenser, supply valves having respective input ports, respective output ports, and respective control ports, a first purge valve having an input port, an output port and a control port, a conduit coupling the output port of a first one of the supply valves to a common point in a fluid circuit, a conduit coupling the output port of a second one of the supply valves to the common point, a conduit coupling the output port of the first purge valve to the common point, and a conduit coupling the common point to the coating dispenser to provide fluid from one of: the output port of said first one of the supply valves; the output port of said second one of the supply valves; and the output port of the first purge valve, to the coating dispenser, the common point coupled to ground.