DRAIN VALVE Russian patent published in 2002 - IPC

FIELD: manufacture of fittings; sanitary fittings; WG flush tanks. SUBSTANCE: flush tank drain valve has seat with cover and guide bush, bottom valve with overflow pipe, risers mounted in seat cover and combined in upper portion by means of rim with control bush mounted inside it; control bush is provided with button unit; valve includes also hold-down and raising strips combined by system of levers and rods. One wall of rim is provided with projection with vertical hole. Other wall of rim has horizontal hole. Fitted on control bush are two strips. One strip is provided with release pin locking in vertical hole of rim projection. Other strip is received by horizontal hole of rim for motion inside it together with button fitted in bush within boundaries of sizes of rim and its holes. Hold-down strip is engageable with button unit. Raising strip is located for motion coaxially with overflow pipe. EFFECT: reduced labor consumption due to control of button unit because of axial misalignment of holes in body and cover of flush tank; reduced force required for placing button unit in operation; avoidance of misalignment of overflow pipe in guide bush; enhanced reliability of levers and rods. 3 cl, 5 dwg