Hydraulic devices used to control timing, direction, and velocity of fluid flow are disclosed. The hydraulic device includes a flush valve. The flush valve includes one or more venturi that assist in moving the fluid through flush valve. A manifold includes a housing defining a piston cavity and a piston. The piston is moveable within the piston cavity by a piston actuator between a first position and a second position. A manifold inlet defined by the housing is configured to receive a first fluid from a supply line and is in fluid communication with the piston cavity. A manifold outlet is defined by the housing and is in fluid communication with the piston cavity in. In the first position, the piston prevents fluid communication between the manifold inlet and the manifold outlet through the piston cavity. In the second position, the manifold inlet is in fluid communication with the manifold outlet such that the first fluid can flow from the supply line to the manifold outlet through the piston cavity.

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.

Vacuum toilet flush valves. The disclosure uses a precise positioning of a magnet with respect to a flush valve plate in order to identify absolute alignment accurately.

The flush water tank apparatus of the present invention includes: a clutch mechanism 30 coupling the discharge valve 12 and the discharge valve hydraulic drive unit 14 to pull up the discharge valve, and being disconnected at a predetermined timing to cause the discharge valve to descend; flush water amount selection device capable of selecting from a first and a second amounts of flush water; a float device 26 including a float and a holding mechanism switchable between a holding and a non-holding states in conjunction with movement of the float; and a timing control mechanism controlling a timing of a drain port 10a being blocked; and, when the second amount is selected, causes the second amount of flush water to be discharged by switching the holding mechanism to the non-holding state before a water level in a storage tank drops to a predetermined water level.

A water control system for a tankless toilet includes a first flush control operating a first control valve, a second control valve, and a first water supply valve. The first control valve is moved by operation of the first flush control. The second control valve and the first water supply valve move by operation of the first control valve. When the first control valve is closed pressurized water is applied to the second control valve and the first water supply valve to maintain them closed. When the first control valve is open the water pressure applied to the second control valve and the first water supply valve is reduced causing them to open. When the first water supply valve is closed pressurized water is prevented from being delivered to a toilet bowl and when open pressurized water is delivered to a bottom jet of the toilet bowl.

A flush water tank apparatus supplying flush water to a flush toilet by using electrical power generated in the flush water tank apparatus, and a flush toilet apparatus including the flush water tank apparatus are provided. The flush water tank apparatus includes a discharge valve hydraulic drive portion, a discharge control device, an electromagnetic valve, a branching portion causing supplied tap water to flow into the discharge control device and into the water supply valve respectively, and a generator generating electrical power to operate the electromagnetic valve. The generator is provided on a water conduit in a downstream side of the branching portion, and on the water conduit in an upstream side of the water supply valve or in a downstream side of the water supply valve.

A plumbing fixture system comprising a plumbing fixture bowl and a trapway fluidly coupled with the plumbing fixture bowl. The plumbing fixture system further comprises a Venturi device comprising an inlet and an outlet. The Venturi device forms an interior volume. The Venturi device further forming a channel from the inlet to the outlet. The interior volume is fluidly coupled to the channel. Liquid flow from the inlet to the outlet causes a first reduction in pressure in the interior volume. The plumbing fixture system further comprises a conduit extending from the interior volume of the Venturi device to the trapway. The first reduction in pressure in the interior volume of the Venturi device causes a second reduction in pressure in the trapway.

Provided is a toilet clog removal device installed in a toilet bowl. The toilet clog removal device comprises cartridge provided in an upper portion of a toilet body and configured to generate or store gas with pressure; a toilet cover hinged to the cartridge and configured to open and close above a toilet seat and the toilet body. The cartridge stores a compound for generating the gas with pressure inside and, when the compound decomposes by igniting an igniter, the gas with pressure is generated and discharged from the cartridge.

A hidden water tank includes a water tank body, including a water inlet assembly and a pneumatic drainage assembly; and a driving panel detachably connected to the water tank body. The driving panel includes one of a pneumatic driving panel, a mechanical driving panel, or an electric driving panel. The mechanical driving panel and the pneumatic drainage assembly are connected through a first driving conversion module configured to convert a mechanical driving force generated by the mechanical driving panel into a first air pressure-driving force. The electric driving panel and the pneumatic drainage assembly are connected through a second driving conversion module configured to convert an electrical signal generated by the electric driving panel into a second air pressure-driving force.

An air drive system for a toilet includes a compression cylinder including an air space, a fluid space, a base orifice adjoining the fluid space, and an outlet orifice adjoining the air space, and an air drive passage configured to carry pressurized air to the toilet. The flow of water increases the fluid space of the compression cylinder or increases an air pressure associated with the air space of the compression cylinder.