A discharge valve device includes a valve body, an actuation shaft, a water storage cylinder, and a float, and from when the valve body opens to when the valve body closes, either flushing mode of a large flushing mode in which the flush water in a water storage tank is supplied from a discharge opening to the flush toilet in a first flush water amount or a small flushing mode in which the flush water is supplied in a second flush water amount smaller than the first flush water amount is selectively executable, and the water storage cylinder or the float is configured to change a lowering speed of the float with decrease in water level in the water storage cylinder depending on the selected large flushing mode or small flushing mode.

The present invention is a flush water tank device including a flush water tank main body, a water supply valve, and a discharge valve, in which during a flush of the flush toilet, the discharge valve is opened until a water level in the flush water tank main body is lowered from a predetermined full water level to a predetermined dead water level, a lowering speed of the water level in the flush water tank main body changes at a predetermined inflection water level between the full water level and the dead water level, and the lowering speed of the water level between the inflection water level and the dead water level is faster than the lowering speed of the water level between the full water level and the inflection water level.

Some embodiments include a fluid valve assembly with an outlet base dimensioned to be positioned through a drain in a fluid tank, and a float assembly including a moveable float. The moveable float can form a fluid-tight seal at a first end when the moveable float is coupled to the outlet base, and a flow opening when the moveable float is at least partially decoupled from the outlet base. Some embodiments include a housing positioned with the moveable float, where the housing encloses a suction device coupled to a moveable piston. Some embodiments include an actuable diaphragm positioned in the outlet base, and a compressed air tube or passageway coupled to one side the actuable diaphragm. In some embodiments, the actuable diaphragm is configured and arranged to be actuated by compressed air to move the moveable piston.

A universal canister flush valve having a valve body configured to be fixed relative to a toilet tank and having a hollow wall defining an internal flow passage; a guide post coupled to and extending away from the valve body; a float fitted about and configured to slide relative to the guide post between a closed position and an open position, the float having an open top; and an extender that selectively couples to the open top in a first position, in which a first end of the extender is received in and coupled to the open top, and in a second position, in which a second end of the extender is received in and coupled to the open top, wherein the extender and float define a first overflow height in the first position and define a second overflow height in the second position.

A trip lever assembly for a toilet includes a body and an infrared sensor. The body is configured to be mechanically coupled to a flush valve assembly of the toilet. The infrared sensor is coupled to the body, and is configured to be electrically coupled to the flush valve assembly. The body is configured to be manually actuated to control the flush valve assembly. The infrared sensor is a time-of-flight sensor configured to detect the distance of an object in a detection region of the infrared sensor to control the flush valve assembly.

Some embodiments include a fluid control system with an outlet valve assembly, an inlet valve assembly including a venturi inlet valve, and an actuator coupled to the inlet valve assembly. In some embodiments, the actuator can enable a user to control a flush volume of fluid control system. Some embodiments include a moveable float positioned in a chamber of the outlet valve assembly, where the chamber includes a variably-sized upper portion with a volume that is based at least in part on a variable position of the moveable float in the chamber. Some embodiments include a adjustable control valves coupled to an outer surface of the outlet valve assembly and the inlet valve assembly. Some embodiments also include a bellows positioned in and coupled to the variably-sized upper portion. In some embodiments, the bellows are fluidly coupled to the venturi inlet valve and at least one of the control valves.

A method and system having a water-flush toilet having a toilet bowl that is in fluid communication with a water source and is mounted with a sensor. The sensor includes a transmitter to transmit an ultrasonic signal and a receiver to receive an ultrasonic signal. The sensor may measure a Time of Flight (ToF) of the signal to obtain a ToF measurement. A microcontroller is electrically connected to the sensor and may receive and process the ToF measurement using an algorithm to determine a bowl status. The toilet also includes at least one water valve that is disposed between the bowl and the water source, and that is electrically connected to the microcontroller for instructing the at least one water valve to move from a first position to a second position for a duration of time, wherein the duration of time corresponds to the bowl status.

A method and system having a water-flush toilet having a toilet bowl that is in fluid communication with a water source and is mounted with a sensor. The sensor includes a transmitter to transmit an ultrasonic signal and a receiver to receive an ultrasonic signal. The sensor may measure a Time of Flight (ToF) of the signal to obtain a ToF measurement. A microcontroller is electrically connected to the sensor and may receive and process the ToF measurement using an algorithm to determine a bowl status. The toilet also includes at least one water valve that is disposed between the bowl and the water source, and that is electrically connected to the microcontroller for instructing the at least one water valve to move from a first position to a second position for a duration of time, wherein the duration of time corresponds to the bowl status.

A touchless actuation system for a toilet includes a touchless sensor, a motor assembly, and a processing circuit. The touchless sensor is located within a closed reservoir of the toilet. The processing circuit is configured to receive a signal from the touchless sensor and to detect an object within a detection region based on the signal. The detection region is external to the closed reservoir. The processing circuit is configured to facilitate flushing of the toilet through interaction with the motor assembly when the object is detected.

A height-adjustable upright tube-cage unit comprising a telescopic cage which comprises an inner cage and an outer cage, and a telescopic upright tube which comprises an inner upright tube and an outer upright tube and is accommodated in the cage, wherein the elements inner cage, outer cage, inner upright tube, and outer upright tube can be connected to each other via a shared, telescopic scaffolding, wherein the scaffolding is adjustable between a first detent position, in which the inner cage is latched with the outer cage and the inner upright tube is latched with the outer upright tube, wherein the upright tube is longitudinally displaceable within the cage, and a second detent position, in which an upper cage part is latched with an upper upright tube part, and a lower cage part is latched with a lower upright tube part.