AIRLESS SPRAYING PAINTING UNIT Russian patent published in 2003 - IPC

FIELD: high-pressure painting units for airless spraying of paints and varnishes over surface of article. SUBSTANCE: proposed painting unit includes membrane pump, drive and gun with high-pressure connecting hose. Sections of paint delivery passages and oil recirculation passages which communicate respective high- pressure zones with regulating valve are rectilinear in shape. Adjusting valves are fitted coaxially relative to paint delivery passages and oil recirculation passages. Surface of piston of hydraulic drive engageable with eccentric is made in such way that it forms contact spot with it. EFFECT: reduced hydraulic losses; enhanced economical efficiency; extended period of trouble-free operation. 4 cl, 4 dwg