Patent ID: 6955724
Filing Date: 2005-10-18
Classification: B05B,F16K

Abstract:
1. A spraycoating device for a coating liquid, said device comprising a coating liquid spray gun which contains a liquid feed valve fitted with a liquid valve seat and a liquid valve element that is displaceable relative to said seat between a fully closed liquid valve position and a fully open liquid valve position wherein the spray gun contains a measuring valve device configured in a compressed gas measuring valve flow path and is ganged to the liquid valve element to implement joint displacement with said liquid valve element so as to be driven by said liquid valve element, the measuring valve device being designed in such a way that, depending on the positions of the liquid valve element, said measuring valve device shall assume a closed position sealing off the compressed gas measuring valve flow path when the liquid valve element assumes the fully closed liquid valve position and when the liquid valve element assumes the fully open liquid valve position, but said measuring valve device shall always be in an open position keeping open the compressed gas measuring valve flow path when the liquid valve element assumes an arbitrary intermediate position between the fully open and the fully closed liquid valve positions, whereby, and depending on compressed gas flowing or not through the measuring valve device, it may be automatically determined whether the liquid valve element assumes one of the fully open or closed liquid valve positions, or an arbitrary intermediate position.