Abstract: A flush toilet 1 has a toilet flushing tank device 7 for discharging flushing water to a toilet bowl 2. This tank device is built into a tank storage region 5 to the rear of the toilet bowl 2, and comprises a flushing water tank 8 and a jet pump 13 disposed submerged in this flushing water tank 8. Flushing water (operating water) is supplied to this jet pump 13 via a flush valve 11 and a pipe 12 downstream from this valve. The jet pump 13 comprises a spray nozzle 131 and a throat 132 opposite thereto. Because the jet pump 13 is connected directly to a pipe 14, all of the flushing water jetted from the jet pump 13 passes directly to the pipe 14, and is guided by this pipe 14 to a rim water channel 4b.

Abstract: A siphon flush apparatus is described which by means of a sliding conduct coupled to a discharge conduct allows the formation of a siphon during the flush operation of a cistern without the need of a jet stream of water, valve means or a piston to initiate said siphon. In addition, the apparatus of the present invention can remain without any leakage into the flushing tube when it is at rest position and need not an additional overflowing discharging pipe to drain an excess of water when the supply valve of the cistern fails.

Abstract: A syphonic flush toilet having a conventional water tank having a drain outlet in its bottom wall. The tank has a lid having a plunger aperture therein. A syphon assembly formed of a floating top housing member and a stationary bottom housing member are located in the tank. The floating top housing member has a top wall having a downwardly extending annular outer side wall and the bottom housing member has a bottom wall having an upwardly extending annular outside wall. The annular outer side wall and the annular outside wall of the respective members are matingly telescopically connected to each other about a vertical axis. An air chamber is formed in the floating top housing member. A discharge pipe has its bottom end passing through the bottom wall of the bottom housing member and its lower end is secured in the drain outlet of the tank. The top end of the discharge pipe extends upwardly into the interior of the neck portion of the floating top housing member.