VALVE FOR LIQUID Russian patent published in 2000 - IPC

FIELD: discharge of water from vessels, for instance, of flush tank of closet basin. SUBSTANCE: valve has siphon installed on discharge pipe and drive member. Siphon is made in the form of external sleeve whose bottom is connected with drive member and whose open side faces discharge pipe. Installed in external sleeve with clearance over its perimeter is bushing protruding from open end. Bushing is made in the form of two coaxial cylindrical shells. They are tightly connected to each other in upper part to form annular cavity. Installed coaxially to discharge pipe on tank bottom is internal cylindrical sleeve with central hole in bottom for connection of sleeve with discharge pipe. Internal sleeve with its open end faces external sleeve. Its side wall is located in annular cavity of bushing. Drive member is tubular for communication of external sleeve internal cavity with atmosphere through hole in its bottom. EFFECT: higher reliability of valve operation for prolonged period of time with no leakage. 5 cl, 2 dwg