Patent ID: 8056154

Claim:
A device ( 10 ) for opening a toilet flushing system, that comprises a water cistern ( 12 ) fed via a tap intended to be connected to a water delivery network, and which is capable of being opened to cause the cistern ( 12 ) to be filled when a water level descends below a determined lower limit (B), said device ( 10 ) comprising: a bottom discharge orifice ( 14 ); a vertical mobile discharge valve element ( 16 ) associated with the orifice ( 14 ) which is capable of occupying a low closed position to keep the water inside the cistern ( 12 ) or a high open position to discharge the water to a toilet pan, and comprises a float ( 18 ) which, when the cistern ( 12 ) is full, is submerged so as to push the valve element ( 16 ) towards an open position; and means ( 20 ) for locking the valve element that is capable of occupying a locked position to keep the valve element ( 16 ) closed or of occupying an unlocked position to allow the float ( 18 ) to pull the valve element ( 16 ) from the closed position to the open position, wherein the float ( 18 ) is secured to the valve element ( 16 ) and the means ( 20 ) for locking comprises a vertically mobile locking finger ( 22 ), substantially coaxial with the valve element ( 16 ) and not fixedly connected to said valve element ( 16 ) which can be moved between: the locked position, in which a latch ( 24 ) configured for latching the means ( 20 ) for locking coaxial with the finger ( 22 ) is activated to immobilize the finger ( 22 ) axially so that the finger is locked in contact with a top bearing face ( 26 ) of the valve element ( 16 ) in order to immobilize the valve element ( 16 ), the unlocked position, in which the latch ( 24 ) is deactivated to release the finger ( 22 ) and to allow the finger ( 22 ) and the valve element ( 16 ) to rise under the action of the float ( 18 ) in order to discharge the water to the toilet pan.