Patent ID: 7086613

Claim:
A liquid spray gun comprising: a housing having a liquid inlet for connection to a pressurized liquid supply source, a discharge nozzle at a downstream end of said housing, a selectively energizable solenoid coil supported within said housing, an elongated core member disposed at least partially within said coil, a valve plunger disposed at least partially within said coil and being mounted for reciprocating linear movement relative to said coil and core for controlling the discharge of liquid from said nozzle, said core and plunger being made of metal, said housing being made of a non-metallic, non-magnetic conductive material, said housing being made of a non-metallic, non-magnetic conductive material such that over at least a portion of an elongated length of said coil no metallic flux-directing material is disposed outwardly of the coil, and a metallic flux-directing element adjacent an end of said coil for directing flux in a loop at least partially encompassing said core and plunger in response to energization of said coil for effecting reciprocating linear movement of said plunger.