| 摘要 |
Discharge valve for WC cisterns, consisting of a vertically raisable and lowerable valve tube, which projects above the normal level of the water in the cistern and has an annular seal ring, which in the lowered state of the tube seals the discharge line of the cistern, with a hollow frustoconical projection arranged therebelow at its lower end and an overflow orifice at its upper end, a float linked to the tube and surrounding it, a retaining device for the lowered tube and a mechanism for raising the tube by actuating a key or a trigger, comprising a valve (32, 38) which, when the mechanism is at rest, separates the interior (30) of the valve tube (2) from the water space (40) of the cistern (4) and upon actuation of the mechanism connects these on the water side, and whose opening cross section is larger than the minimum internal cross section of the valve tube (2) in its outflow direction, a bell (7), which surrounds the upper section (26) of the valve tube (2) at a radial distance, is open at the bottom, and in the case of a normal level (50) in the water space (40) is partially immersed in the water, and at least one communication hole (33) between the interior of the bell (7) and the interior (30) of the valve tube (2, 26). <IMAGE>
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