The present invention is a flush water tank apparatus (4) and includes: a storage tank (10) on which a drain port (10a) is formed, a discharge valve (12) opening/closing the drain port; a discharge valve hydraulic drive unit (14) driving the discharge valve using water supply pressure; a clutch mechanism (30) coupling the discharge valve and the discharge valve hydraulic drive unit to pull up the discharge valve; flush water amount selection device capable of selecting between a first and a second amount of flush water; a timing control mechanism controlling a timing of the drain port being blocked; and a control jet unit (20) jetting, when the second amount is selected, flush water to a water receiving surface provided on the timing control mechanism so that a timing of the drain port being blocked is earlier than a case of the first amount of flush water.

A flush water tank apparatus enabling accurately setting an amount of flush water to be discharged while opening a discharge valve via a discharge valve hydraulic drive unit and a flush toilet apparatus including the flush water tank are provided. A flush water tank apparatus includes a first float device; a second float device that prevents from descent of the discharge valve according to the water level so as to discharge a second amount of flush water; and an adjustment mechanism configured so that when the second amount of flush water is selected by the flush water amount selection portion the clutch mechanism is disconnected at a pull-up height of the discharge valve such that the discharge valve descended by the disconnection of the clutch mechanism is held by the second float device in a holding state.

A drain fitting for a toilet cistern including a drain valve, which is constructed from a discharge nozzle mounted on the cistern and a lift-adjustable overflow tube, which closes a flow passage through the discharge nozzle in its closed position, and having a pneumatic actuator, with the aid of which, upon the application of pressure, the overflow tube is adjustable into its open position, in which a quantity of flush water is able to flow out of the discharge nozzle of the toilet cistern. An underpressure may be applied to the pneumatic actuator to lift-adjust the overflow tube into its open position. The drain fitting includes an, in particular water-conducting, underpressure unit, which is connected to the pneumatic actuator and generates an underpressure acting upon the pneumatic actuator upon activation by the user.

A discharge valve operating device includes an electric operation unit including a rotating shaft, a first coupling member and a second coupling member having respective one ends coupled to a discharge valve, a first rotary winding member, and a second rotary winding member. The first rotary winding member and the second rotary winding member include a first holed portion and a second holed portion, respectively, which are provided near portions at respective rotation centers. Each holed portion is engageable and disengageable with the rotating shaft in a rotation direction in accordance with the rotation direction of the rotating shaft in each operation mode.

A discharge valve operating device includes a first linking member and a second linking member, a rotary winding device, and an operation unit configured to rotationally operate the rotary winding device, wherein when the operation unit rotationally operates in a first direction, the operation unit is configured to perform toilet flushing in a full-flushing mode by pulling up the discharge valve by a first length by the rotary winding device winding the first linking member by the first length in the first direction, and when the operation unit rotationally operates in a second direction opposite to the first direction, the operation unit is configured to perform toilet flushing in a partial-flushing mode by pulling up the discharge valve by a second length by the rotary winding device winding the second linking member in the second direction by the second length which is the same as the first length.

A toilet flushing assembly includes at least a spiral trapway and a drive mechanism. The spiral trapway includes an upstream portion coupled to a toilet bowl, a curved portion, and a downstream portion coupled to a waste outlet. The drive mechanism is coupled to the spiral trapway and configured to rotate the spiral trapway from a first orientation to a second orientation. The first orientation evacuates contents from the toilet bowl and the second orientation advances the contents from the spiral trapway to the waste outlet.

A discharge valve operating device includes an electric operation unit including a rotating shaft, a first coupling member and a second coupling member having respective one ends coupled to a discharge valve, a first rotary winding member, and a second rotary winding member. The first rotary winding member and the second rotary winding member include a first holed portion and a second holed portion, respectively, which are provided near portions at respective rotation centers. Each holed portion is engageable and disengageable with the rotating shaft in a rotation direction in accordance with the rotation direction of the rotating shaft in each operation mode.

The present disclosure relates to the technical field of toilet equipment, particularly to a toilet. The toilet includes a toilet body, a water tank, an air isolation device, and a water pump, wherein the toilet body is provided thereon with a spout directly facing a sewage exit; the water pump is configured to draw water from the water tank, a water outlet of the water pump is in communication with the spout of the toilet body via the air isolation device, and the air isolation device is configured to block reverse flow of sewage from the spout of the toilet body to the water tank.

The invention relates to a drain valve for a sanitary flushing cistern, in particular a flush-mounted flushing cistern, including a valve housing and a valve body guided in the valve housing and configured as an overflow pipe having a seal assigned to a valve seat, wherein the valve body is provided with at least one pull tab for lifting the valve body, and one buoyant body.

A drain fitting for a toilet cistern including a drain valve, which is constructed from a discharge nozzle mounted on the cistern and a lift-adjustable overflow tube, which closes a flow passage through the discharge nozzle in its closed position, and having a pneumatic actuator, with the aid of which, upon the application of pressure, the overflow tube is adjustable into its open position, in which a quantity of flush water is able to flow out of the discharge nozzle of the toilet cistern. An underpressure may be applied to the pneumatic actuator to lift-adjust the overflow tube into its open position. The drain fitting includes an, in particular water-conducting, underpressure unit, which is connected to the pneumatic actuator and generates an underpressure acting upon the pneumatic actuator upon activation by the user.