BOTTOM VALVE Russian patent published in 2003 - IPC

FIELD: water drain from tanks including from flush cistern to water-closet bowl in sanitation engineering. SUBSTANCE: bottom valve has body with central drain hole and inclined seat, flat shut- off member coupled with float and lever, and overflow pipe. Pin that enters lever hole is arranged on bottom part of overflow pipe. Cable is attached to shut-off member. The latter has supporting disk rigidly coupled with lever and flexible disk disposed on seat end, both abutting against one another. Flexible disk mounts float having guaranteed annular clearance between peripheral sections of their butt-end surfaces. Both disks and float are joined together by means of screw passed through their axial holes and cap nut. Pin is passed through oval-shaped holes of levers. EFFECT: improved sealing of joint between shut-off member and seat. 4 cl, 4 dwg