SPRAYER Russian patent published in 2003 - IPC

FIELD: mixing and spraying two agents. SUBSTANCE: proposed sprayer is provided with valve for each agent arranged one inside other for axial motion inside body. Seat of inner valve is made in outer valve whose seat is made in body. Inner and outer valves actuated by external force are hydraulically interconnected during initial motion and body of inner valve is in closed position. External force is applied by pneumatically operated piston whose rod is connected with body of inner valve for motion in outer valve; axial motion in outer valve is limited by stop fitted in body; provision is made for insignificant further motion of body of inner valve in opening inner valve. Check valve fitted in hole of inner valve is opened by agent. Hole of one of valves is made at distance from hole of other valve in axial direction. Holes of both valves are opened to common mixing chamber or mixing passage. Motion of pneumatic piston rod is controlled by rod of valve which is actuated by sprayer trigger; when it is placed in one of final positions, it cuts out supply of air to pneumatic piston simultaneously opening the hole and vice versa. EFFECT: simplified maintenance; low cost; avoidance of choking of holes to definite degree. 6 cl, 4 dwg