OVERFLOW DEVICE AND DRAIN VALVE FOR A FLUSH TANK EQUIPPED WITH SUCH A DEVICE Russian patent published in 2017 - IPC E03D1/34 

FIELD: sanitary equipment.

SUBSTANCE: group of inventions relates to sanitary equipment. Overflow device has a tube extending along an axis and having two open opposite axial ends and a cover at the top end of the tube. Top end of the tube has an inlet opening bounded by a substantially annular inlet edge. Cover and the inlet opening form a siphon system. Cover has a bottom end edge, which surrounds the inlet edge and is located radially outwards of the inlet edge and axially below or substantially flush with a top face of the inlet edge. Drain valve comprises a supporting structure with a sealing seat bounding a drain hole, and a valve body, and a valve body housed to slide inside the supporting structure and having a shutter at the bottom, which cooperates with the sealing seat to close the drain hole. Valve comprises the above overflow device. Tube limits the valve body or forms a part of the valve body.

EFFECT: invention provides an overflow device of improved water disposal capacity, a flush tank incorporated in the drain valve, which is simple, effective and reliable.

12 cl, 6 dwg