Abstract: A flush tank has a downwardly open outlet, a valve for filling the tank with a liquid, and a flush valve having a tube fitted to the outlet and having an upper end vertically displaceable in the tank between an upper position and a lower position. A float fixed to the tube upper end and having an upwardly open compartment has a low buoyancy insufficient to hold the tube upper end above the liquid level when the compartment at least partially filled with water and a high buoyancy capable of holding the tube upper end above a liquid level in the tank when the compartment is empty.

Abstract: A flush tank having a downwardly open outlet and a valve for filling the tank with a liquid has a flush valve having a tube fitted to the outlet and having an upper end vertically displaceable in the tank. A float fixed to the tube upper tube end has a buoyancy changeable between a high buoyancy capable of holding the tube upper end above a liquid level in the tank and a low buoyancy insufficient to hold the tube upper end above the liquid level. An actuator connected to the float can temporarily change the float from high buoyancy to low buoyancy and thereby sink the tube upper end below the liquid level and cause the is liquid in the tank to flow through the tube out of the outlet. The float has a lower part annularly surrounding the tube and an upper part formed as an upper space having a large upwardly open mouth level with the upper end of the tube and a small opening below its mouth opening into the tube.

Abstract: A flush valve has a valve ring defining a downwardly open valve port and an overflow tube centered on an upright axis and having a lower end seatable on the port. The tube is displaceable relative to the port between a lower closed position and an upper open position. Mechanism inside the tube can lift the tube into the open position and thereby allow water in the tank to move down and out through the port. A lower float vertically fixed in the tank is displaceable between a latching position and a releasing position and is constructed such that when submerged it normally assumes the latching position. A latch on the lower float engageable with the tube can hold the tube in the open position and can release the tube for movement into the closed position and ending of a flushing cycle. An upper float in the tank above the lower float has a part engageable with the lower float for displacing same into the releasing position on downward displacement of the upper float toward the lower float.

Abstract: A self-closing valve assembly has a main valve having a seat between a high-pressure input conduit and a low-pressure output conduit, a main valve element movable into and out of engagement with the seat to block and permit flow from the input conduit to the output conduit, and a chamber behind the main valve element pressurizable to press the main valve element against the seat. A small-diameter passage extends from the input conduit to the chamber so that the chamber can be pressurized via the passage from the input conduit to hold the valve element against the seat. A pilot or control valve connected between the chamber and the output conduit can be opened to depressurize the chamber and thereby lift the valve element off the seat.

Abstract: A flush valve has a valve ring defining a downwardly open valve port, an overflow tube centered on an upright axis and having a lower end opening into the valve port, and a valve body at the tube lower end displaceable relative to the port between a closed blocking position and an open position. Mechanism inside the tube lifts the valve body into the open position. A float in the tank adjacent the port cooperates with a latch system connected to the valve body for holding the body in the open position while the float is generally submerged. The tube is internally formed with an inwardly projecting ridge.

Abstract: A lavatory flushing device includes a lavatory basin provided with a flushing box having a filling valve and a discharge valve. A separating wall separates the flushing box into a flushing chamber containing the discharge valve, and a further chamber containing the filling valve. At least one water conduit leads from the filling valve into the flushing chamber. The separating wall is provided with an overflow conduit, which is directed to a rerouting device so as to close the filling valve following termination of the flushing process. Thus a very high water level is obtainable in the flushing chamber so as to achieve an effective lavatory flushing even at relatively low flow pressures in the supply conduit, and also if, due to esthetic reasons, the flushing box exceeds the level of the lavatory basin by only a small amount.

Abstract: A self-closing valve fitting comprises a housing which bounds an internal space and includes a water inlet and a water outlet communicating with the internal space and a valve seat situated between the water inlet and the water outlet. A valve piston is received in the internal space for movement toward and away from the valve seat and for attendant cooperation with the valve seat. The valve piston delimits in the internal space, at a side thereof which faces away from the valve seat, a relief chamber. An actuation valve is arranged in the valve piston between the relief chamber and the water outlet and forms a part of an arrangement for self-retention of the fitting during a delayed opening movement of the valve piston. A deaeration member is arranged in the relief chamber and forms at a region of a jacket wall of the housing which circumferentially bounds the relief chamber at least one small flow-through passage which leads to the actuation valve.

Abstract: A flushing valve arrangement for controlling the flow of a pressurized flushing liquid includes a housing unit including an inlet and an outlet for the flushing liquid and a housing which bounds a flow passage that connects the inlet with the outlet. The housing is outwardly spaced from the outlet to bound therewith an annular channel which surrounds the outlet and opens into a communication region of the flow passage. A flushing valve unit is interposed in the flow passage downstream of the communication region and controls the flow of the flushing liquid from the inlet to the outlet. An externally actuatable shut-off valve unit is integrated into the arrangement and includes a shut-off sleeve surrounding the outlet and movable into and out of the annular channel toward and away from its closing position in which it extends into the communication region of the flow path and prevents the flushing liquid from flowing from the inlet toward the flushing valve unit.

Abstract: A self closing valve has a housing with a water inlet and outlet and with a valve piston positioned inside it in such a way that the end of the piston facing away from the valve seat demarcates a discharge chamber in conjunction with the inlet and outlet through flowthrough passages that are activated in opposite directions by supplementary-valve controls in such a way that the duration of operation is determined by a decelerated opening stroke of the valve piston and closure is activated by a rapid closing stroke of the valve piston. The initiating position of the supplementary-valve controls that is provided during the opening activation of the valve piston is designed to maintain itself hydraulically as the result of a pressure difference generated at a choking device as the result of the flow through the valve and discontinuing the automatic maintenance shifts the supplementary-valve controls.

Abstract: The valve piece of a toilet-tank discharge valve is moved into its open position by the release activation of an associated activating mechanism. It usually remains in this position until the flushing process is complete and the drops back into the closed position. The valve piece can also be moved back into its closed position ahead of time by discontinuance activation. The activating mechanism has a shift mechanism that can be reversed in its operating direction by a change of state in the toilet tank associated with release activation in such a way that discontinuance activation can result from renewed activation of one and the same activating mechanism in the same direction as during release activation. The device is convenient to operate and provides a wide range of possible ways of designing the operating element from the aspect of appearance. Simple remote operating devices can also be employed.

Abstract: A toilet-tank discharge valve has a main-valve body that can be lifted off of its face, by release-activating an auxiliary valve with an activating mechanism, as a consequence of negative water balance in an associated discharge compartment. A supplementary auxiliary valve is associated with the discharge compartment and opens at least briefly as a result of discontinuance activation of the activating mechanism, producing a positive water balance in the discharge compartment until the main-valve body closes. A valve of this type, with an auxiliary valve, makes it possible to discontinue the flushing process ahead of time. A shift mechanism in the connection between the activating mechanism and the supplementary auxiliary valve shifts the supplementary auxiliary valve from whatever limiting position it happens to be in into the opposite limiting position in response to a discontinuance activation.

Abstract: A valve assembly for evacuation of liquids from vessels of the type having a bottom wall provided with an outlet opening has a buoyant piston which forms part of a main valve and is movable to and from a closed position in which a sealing ring of the piston engages an annular seat surrounding the outlet opening. The upper surface of the piston is located below a liquid column in the chamber of a vertically movable housing having a valve member defining with a second sealing ring of the piston an auxiliary valve which is opened in response to depression of the housing to thus connect the chamber with the outlet opening whereby the pressure of the liquid in the chamber decreases. The difference of the pressure between the bottom of the vessel and the chamber pushes the piston upwardly because the effective area of the upper surface of the piston is larger than the effective area of its seat. Such upward movement is enhanced by the buoyancy of the piston.