Abstract: Water outlet valve structure and a humidifier having the same. Opening or closing of the water outlet valve structure is controlled by a control structure. The water outlet valve structure includes a flow channel including an inlet and an outlet. The control structure is capable of sealing or opening the outlet of the flow channel. The outlet of the flow channel is capable of being sealed or opened by the control structure of the water outlet valve structure, to control the open and close of the flow channel, thereby simplifying the water outlet valve structure. In a further aspect, since only the outlet is sealed, specific requirements for the structure of the control structure are relatively low, thereby allowing the control structure to be simplified.

Abstract: A coupling arrangement in a medicament delivery device, the coupling arrangement being adapted to permanently attach a first and a second longitudinally elongated tubular component to each other. The coupling arrangement includes a first positive connection mechanism configured to lock the first and the second components to each other such that the components are locked from being moved in a longitudinal direction in relation to each other, and a second positive connection mechanism configured to lock the first and the second components to each other such that the components are locked from being rotated in relation to each other about a longitudinal axis of the components.

Abstract: A water appliance including a water flow control unit for controlling a water flow. The control unit includes a flow restrictor and a leakage stop in serial fluid communication with the flow restrictor. The leakage stop cuts off the flow when a pressure difference between an inlet and an outlet of the flow restrictor is below a predetermined value.

Abstract: A pilot fill valve includes a float that is separated into upper and lower cavities by an angled partition through which a drain outlet and an overflow outlet are disposed. When the level of the float drops, a portion of the water supplied to the fill valve is diverted to a tank to raise the float, while the remainder is diverted to the upper cavity increasing the weight of the float. As the float begins to rise, the water in the upper cavity drains through the drain outlet and overflow outlet, making the float lighter, and causing the float and pivot arm to rotate with increased velocity, allowing the pilot cap carried by the pivot arm to fully shut off the valve.

Abstract: A water refilling plug for automatically filling battery cells has a cylindrical plug housing that includes a connector fitting for water delivery into a housing, as well as a valve, actuated by a float, having an annular valve body and a conical valve seat. The valve is arranged between an inflow channel and an outflow channel leading into the battery cell. In accordance with the invention, swirl-generating deflection channels are arranged between the annular inflow channel and the conical valve seat in a pattern distributed over a circumference in the plug.

Abstract: A cut-off valve assembly for use with a toilet tank, includes a float within the toilet tank, a water retaining float guide within the toilet tank which allows the vertical travel of the float, the water retaining float guide having weep holes below the lowest travel of the float. The weep holes slowly release the retained water when the water in the tank is below the weep holes, a magnet within the toilet tank, affixed to the bottom of the float, and a magnetically activated cut-off valve for cutting off the water flow to the toilet tank when activated by the magnet. The magnet will activate the magnetically activated cut-off valve when the float is at the lowest travel. A preferred form of the cut-off valve assembly also includes a stem affixed to the float and extending downward from the float. The magnet is affixed to the bottom of the stem, and the magnet is affixed to the float through the stem. In a preferred form, a magnet housing is affixed to the bottom of the stem.

Abstract: A fill valve for a toilet tank includes a multi-piece shank assembly. The shank assembly includes a first hollow member coupled with a second hollow member using a snap joint. The first hollow member has a tortuous outer surface, which together with the second hollow member forms a plurality of flow paths. The flow paths are configured to reduce water noise. The first and second hollow members are provided separately, resulting in simplified molding process and improved assembly automation.

Abstract: A shut-off valve assembly for regulating the flow of fluid through or from a fluid line. The assembly comprises: a body attachable to or within a fluid line and having a chamber therein with inlets and an outlet for fluid from the fluid line; a valve seat that provides the outlet; a baffle arrangement including a baffle housing; a valve member having a sealing member movable between a shielded position, whereby the sealing member is substantially shielded by the baffle housing from a fluid stream moving from the inlets to outlet, and an unshielded position, whereby the sealing member can be forced by the fluid stream against the valve seat to seal the outlet; and a solenoid-spring drive for moving the sealing member between the shielded and unshielded positions.

Abstract: An outflow regulator for a gravity-fed liquid outlet of a liquid reservoir comprising a restriction plate mountable within the liquid outlet for limiting a flow rate of an effluent. The restriction plate allows a lower passage for the effluent when a first level of liquid is reached within the liquid reservoir, and an upper passage for the effluent when a second level of liquid is reached. The regulator also comprises a flapgate pivotable between a closed position where the flapgate covers the lower passage of the restriction device and an open position away from the restriction plate. When the flapgate is in the closed position, the effluent is free to flow out though the upper passage. A float counterweight switches the flapgate between the opened position and closed position according to the liquid level in the reservoir.

Abstract: A fill valve assembly comprises a valve body extending along a longitudinal axis and defining a fluid inlet, a valve seat and at least one fluid outlet, an axially slidable valve element arranged for axially slidable movement along the longitudinal axis, into and out of sealing engagement with the valve seat, the axially slidable valve element defining a first upstream conical surface having a first surface area and a second downstream conical surface having a second surface area, greater than the first surface area, and a fill sensor operative below a predetermined fill threshold to prevent the axially slidable valve element from establishing sealing engagement with the valve seat.

Abstract: Various toilet valves and methods are described that provide for locking of the toilet filled in a closed state. In one embodiment, a toilet fill valve is provided having an actuating arm. The toilet fill valve is closed when the actuating arm is disposed in a first position and is open when the actuating arm is disposed in a second position. A valve lock is attached to the actuating arm. The valve lock includes an unlock position and a lock position. The valve lock fixes the actuating arm in the first position when the valve lock is in the lock position.

Abstract: A toilet fill valve and methods are provided. In one embodiment, the toilet fill valve includes a water inlet and a first water outlet configured to supply water to a toilet tank. The toilet fill valve further includes a bowl fill valve having a bowl fill valve inlet and a bowl valve outlet, the bowl fill valve inlet being operatively coupled to the water inlet. The bowl fill valve is integrated with a body of the toilet fill valve. The bowl fill valve is configured to supply an adjustable flow of water out the bowl fill outlet for filling a toilet bowl during a flush cycle of a toilet.

Abstract: A lavatory flush tank silent-operating fill device has a silencer extending along an axis and through which a stream of water flows; a number of channels are defined inside the silencer by a bundle of substantially straight, parallel tubes housed inside the silencer and parallel to the axis, and into which the stream of water is divided; and the flow section of the channels is such that flow of the water inside is substantially laminar.

Abstract: A ballcock valve with a valve body mounted on a tubular riser with a valve seat which passes water from the riser. The valve body includes a base and a removable cap which enclose valve workings. A screen body passed through the valve seat has a central passage and openings to the passage that exclude particulate solids. A flow control is fitted to the screen body. The combined screen body and flow control is upstream from the valve seat. Preferably a retainer releasably holds the screen body against axial movement when installed.

Abstract: The fill valve incorporates a housing (8) that has a vertical water-carrying channel (24) that leads from an inlet (49) to be fastened on the flush tank bottom (2) to a float-controlled diaphragm valve (50). The diaphragm valve (50) incorporates in a diaphragm (43) a passage for the pressure equalization between a first chamber (51) in front of the diaphragm (43) and a second chamber (52) behind the diaphragm (43). To actuate the diaphragm valve (50) a pilot valve (58) is provided. The diaphragm valve (50) is disposed laterally on the housing (8), thus permitting a low overall height.

Abstract: A fluid tank valve assembly of the type employed for water tanks for toilets has a tank refill valve located atop a fluid inlet supply tube. The refill valve has a lever that is raised and lowered to open and close the valve. An inverted, cup-shaped hood is positioned atop the valve and a float is located about the skirt of the hood and secured thereto by the force of friction. The float can be moved longitudinally along the skirt of the hood in order to vary the water level at which the hood bears down upon the lever arm or is lifted from the lever arm, thereby varying the water level at which the valve is actuated. The valve itself is equipped with a metering pin that is configured to reduce the likelihood of clogging in the longitudinal passage of the core of the valve diaphragm.

Abstract: The invention relates to a faucet for filling tanks known as silent and/or fast-closing faucets. The faucet comprises a basic structure and functionalities such as those disclosed in Patent 9400095. The device assembly controlling opening and closing of the faucet has important improvements in comparison with other conventional faucets and in comparison with the above-mentioned patent. The faucet also includes a lever system connecting the float and the piston acting upon the opening and closing device. In additional, improvement deals with the telescopic structure of the fluid outlet tubes to the tank in order to regulate the height thereof depending on the depth of the tank so that the fluid is always discharged into the water with the aim of preventing noises.

Abstract: A diverter valve for selectively passing water from a ballcock valve directly to a water storage tank or to the rim of a toilet. It includes a diverter plunger which places a deflector into the path of water from the ballcock, and a float which removes the deflector from the lumen when the ballcock valve is closed and the water level is sufficiently high, and lowers the plunger when the water level is sufficiently low.

Abstract: A fill valve assembly for a toilet tank which reduces the fluid noise associated with filling of the tank. The fill assembly includes a fill tube mounted within the tank for delivering water. A fill housing is mounted to the upper end of the fill tube and includes a fill valve operably connected to a float. The float will open the valve when the water in the tank drops below a predetermined level and shuts off the valve when the fluid reaches the level. The interior of the housing includes structure for forming a laminar fluid flow out of the valve which reduces the fluid noise associated with filling the tank.

Abstract: A toilet tank valve having valve workings supported on a riser. The riser incorporates a serpentine ladder-like groove pattern engaged by a tooth, such that the height of the valve workings can be adjusted by a ladder-like relative movements of an inner and outer tube.

Abstract: A fill valve assembly for a toilet tank which reduces the fluid noise associated with filling of the tank. The fill assembly includes a fill tube mounted within the tank for delivering water. A fill housing is mounted to the upper end of the fill tube and includes a fill valve operably connected to a float. The float will open the valve when the water in the tank drops below a predetermined level and shuts off the valve when the fluid reaches the level. The interior of the housing includes structure for forming a laminar fluid flow out of the valve which reduces the fluid noise associated with filling the tank.

Abstract: A toilet fill valve (16) includes a fill tube (21) which is mounted through a hole (14) in a toilet tank wall (12), having isolating means for isolating the fill tube (21) from direct contact with the toilet tank wall (12), as well as isolating water-borne noise and vibration in the fill tube (21) from direct transmission to the wall (12) of the tank (10).

Abstract: The limitor includes a tubular valve body that houses a poppet valve axially moveable between opened and closed positions by an external float. The poppet is protected from direct engagement with incoming pressurized liquid by an overhead deflector that diverts incoming liquid radially outwardly into an annular region around the deflector so that the liquid can pass through a port underlying and spaced below the poppet. This prevents premature closing of the valve. Preferably, the limitor is constructed from a main support tube that becomes attached to the tank and a valve subassembly that is threadably joined with the tube and projects down into the interior of the tank during use. Alternative embodiments are disclosed, including drop tube versions, for facilitating initial installation of the limitor on the top wall of a tank.

Abstract: A float assembly for a ball cock assembly for a flush tank of a toilet includes an inner float component which is a buoyant element operatively connected to a shutoff valve atop a standpipe supplying water to the tank. The inner float component is disposed in an outer float component which is in the general form of a container disposed within the flush tank so that its top edge is at a selected water level. In the tank-filling portion of a flush cycle, when the water rises to the selected level, the outer float component suddenly becomes filled with water, causing the inner float element to abruptly rise, shutting off the flow of water into the flush tank. In this manner, the buoyant element is caused to rise at a rate which is greater than a rate at which the water is rising in the tank.

Abstract: A toilet fill valve (16) includes a fill tube (21) which is mounted through a hole (14) in a toilet tank wall (12), having isolating means for isolating the fill tube (21) from direct contact with the toilet tank wall (12), as well as isolating water-borne noise and vibration in the fill tube (21) from direct transmission to the wall (12) of the tank (10).

Abstract: A shut-off valve for a tank, including a filling tube with a filling-side valve seat and a tank-side valve seat. The seats being spaced apart from one another in a throughflow direction of the filling tube. A valve body with a sealing element is movable between the valve seats so as to butt against one of the valve seats depending on position of the valve body in the tube. A component is provided for prestressing the valve body toward the filling-side valve seat so as to seal the filling tube in relation to the filling-side valve seat in a rest position of the valve body, the prestressing component being configured so that the prestressing of the valve body can be overcome by flow pressure of a medium which is to be introduced toward the tank-side valve seat.

Abstract: A toilet fill valve includes a housing defining a water fill passage and a water inlet. A valve disposed in the passage divides the housing into a upstream portion and a downstream portion. A pressure regulator vertically oriented in the downstream portion of the housing has a spiral configuration providing a significant pressure drop in the water flow. Noise abatement is enhanced by pressure regulation which reduces the flow velocity, flow directors which inhibit turbulence, and energy drops provided in a downspout.

Abstract: A stop valve to terminate flow of liquid there through when the level of the liquid reaches a desired level in a container. The stop valve includes a master diaphragm valve (38) to regulate the flow of liquid through the valve and a pilot diaphragm valve (10) controlling the master valve. The pilot diaphragm valve (10) is subject to the position of a float (37) on the liquid in the container.

Abstract: A toilet tank with a sediment removal assembly comprises a flexible tube connected to the upper discharge spout of the intake standpipe in the toilet tank cavity, and a configured length of copper tubing connected to the flexible tube for water to flow therethrough when the float valve is open to flow water into the tank during a flushing operation. The copper tubing has a longitudinal section which extends downwardly and vertically from its connection to the flexible tube, an integrally joined first lateral or horizontal section curved or bent to lie on the bottom wall of the tank adjacent to the rear wall, and an integrally joined second lateral or horizontal section curved or bent to extend substantially normal to the first lateral section and lie on the bottom wall of the tank adjacent to the then facing end wall of the tank.

Abstract: A fill valve particularly suited for OEM assembly in gravity operated flush toilets has a modular construction including a main valve body that encloses a pilot operated diaphragm valve operated by a float arm. A hollow riser has a lower end configured for connection to a water supply line. Mating couplers are provided on the bottom of the main valve body and on the upper end of the riser for rigidly securing the riser to the main valve body. The riser has a length that is pre-selected to place the diaphragm valve and float arm a predetermined height within the tank to ensure that the tank is re-filled to a predetermined optimum level.

Abstract: A ballcock valve with a cap having an opening, and in the opening an axial groove. A valve control has a neck that fits in the opening, and a tooth that fits in the groove, so that when a shoulder on the cap and on the valve control abut, the valve control can be rotated to hold it to the cap. When the cap is fixed to a base, a control diaphragm is properly positioned relative to the base and to a valve seat on the base.

Abstract: A ballcock type flow-limiting valve for refilling a water tank and commode. A vertical riser has an internal inlet water passage connected to the valve base which has a recess surrounding the inlet seat forming a lower discharge chamber. A removable, dome shaped cap is secured to the valve base, overlaying the recessed area and forming an upper flow chamber. A vertical, free floating piston that controls inlet water flow and shut off is mounted slidingly through a central boss in the cap top and is actuated by an external pivoted arm. The piston and the lower discharge chamber incorporate features designed to limit water inlet flow to the discharge chambers and also to prevent accidental excessive movement of the piston. Provision is included to allow for possible valve blockages due to part swelling or water debris, and to ensure water flow access to the discharge passages for refill. The piston is accessible for servicing or removal by easy removal of the cap.

Abstract: A toilet fill valve includes an outlet pipe associated with a wash basin, an outlet tube associated with a wet-bowl configuration and an outlet assembly for filling the tank of the toilet. A blocking device includes a first plug for blocking the pipe in the absence of a wash basin, and a second plug for blocking the outlet tube in the absence of a wet-bowl configuration. An outlet assembly includes a deflector for directing water against a side wall of the tank, and an aerator for adding turbulence to the water in order to minimize noise associated with filling the tank with water.

Abstract: A leak preventing detent apparatus for a toilet flush valve assembly in which an inlet valve (13) to a toilet flush tank (11) is controlled by an inlet valve control device (14, 14a, 16, 17), and an outlet flush valve (21) is controlled by a flush lever (919). The detent apparatus includes a follower member (28) that is moved in response to movement of the flush lever at the initiation of a flush cycle, and a detent (25) that is operative to prevent opening of an inlet valve (26) except when a flush cycle is deliberately initiated. In a preferred form of the invention, a primary inlet valve (26) is provided upstream of the usual inlet valve (13) that is controlled by an inlet valve control device, such as a float (14, 14a, 16, 17), and the detent apparatus effectively cooperates with the primary inlet valve to maintain it closed unless a flush cycle is deliberately initiated. The detent member may be hydraulically damped (37-42) to provide a timed delay of its movement into the inlet valve closing position.

Abstract: A new Bifurcated Fill Valve Assembly for permitting removal of a fill valve from a toilet tank without disturbing the seal at the toilet tank and without disconnecting the water supply line. The inventive device includes a tank fitting extended through and mounted within an opening in a wall of a toilet tank and a fill valve including a valve body having an inlet portion wherein the inlet portion of the fill valve is releasably coupled to the tank fitting within the toilet tank. As such, the fill valve can be uncoupled from the tank fitting and removed from the toilet tank while the tank fitting remains mounted within the toilet tank and coupled to a water supply conduit that supplies water to the fill valve when in use.

Abstract: An adjustable height fill valve assembly for controlling water level in a storage tank, comprises a lower riser assembly comprising concentrically disposed inlet riser and an outer riser housing, each having an upper end and a lower end, the inlet riser and the riser housing connected together at the lower ends, the inlet riser being adapted for mounting in a hole in a flush tank, an upper riser assembly comprising concentrically disposed inner supply tube and an outer tubular valve housing, each having an upper end and a lower end, a main valve seat at the upper end of the inner supply tube, the upper riser assembly telescopically mounted on the lower riser assembly, a latch between the riser housing and the tubular valve housing for latching the upper and the lower riser assemblies in selected extended and retracted positions, the latch disengageable upon rotation of the upper riser assembly in either direction from a central position, a valve housing cap having a bayonet lock connection for quick connect d

Abstract: A leak preventing detent apparatus for a toilet flush valve assembly in which an inlet valve (13) to a toilet flush tank (11) is controlled by an inlet valve control device (14, 14a, 16, 17), and an outlet flush valve (21) is controlled by a flush lever (19). The detent apparatus includes a follower member (28) that is moved in response to movement of the flush lever at the initiation of a flush cycle, and a detent (25) that is operative to prevent opening of an inlet valve (26) except when a flush cycle is deliberately initiated. In a preferred form of the invention, a primary inlet valve (26) is provided upstream of the usual inlet valve (13) that is controlled by an inlet valve control device, such as a float (14, 14a, 16, 17), and the detent apparatus effectively cooperates with the primary inlet valve to maintain it closed unless a flush cycle is deliberately initiated. The detent member may be hydraulically damped (37-42) to provide a timed delay of its movement into inlet valve closing position.

Abstract: A float-controlled, ball cock assembly comprises an improved two-piece valve useful with either a fixed height or an adjustable height riser. The two-piece valve includes a resilient valve seal element and a rigid valve cap fitted together to form an annular chamber therebetween. A rigid spacer sleeve is positioned in the chamber to limit the movement of the valve seal element between the closed position in contact with a valve seat and the open position spaced from the valve seat. The adjustable height riser includes inlet and outlet tubes, each composed of two parts telescopically engaging one another. Adjustment of the height of the riser is achieved by the use of one or more T-shaped tabs which are secured by a lock collar threaded onto the outer of the two telescoping outlet tubes and which can be moved locking into and out of engagement with radially extending grooves on the outer surface of the inner outlet tube.

Abstract: A leak preventing detent apparatus for a toilet flush valve assembly in which an inlet valve to a toilet flush tank is controlled by an inlet valve control device, and an outlet flush valve is controlled by a flush lever. The detent apparatus includes a follower member that is moved in response to movement of the flush lever at the initiation of a flush cycle, and a detent that is operative to prevent opening of an inlet valve except when a flush cycle is deliberately initiated. In a preferred embodiment, the detent member acts directly on the inlet valve to maintain it closed until a flush cycle is deliberately initiated. The detent member may be hydraulically damped to provide a timed delay of its movement into inlet valve closing position.

Abstract: A valve assembly is provided for controlling the flow of fuel to the fuel chamber of a carburetor. The valve assembly includes a housing and a needle. The housing includes a side wall defining an inlet, an outlet in fluid communication with the inlet, and an interior region between the inlet and outlet. The needle is received in the interior region of the housing for movement therein between a closed position blocking the flow of fuel between the inlet and the outlet and an open position allowing the flow of fuel between the inlet and the outlet. The needle includes a post and a skirt fixed to the post. The skirt extends outwardly from the post and cooperates with the side wall to restrict the flow of fuel therebetween dampening the movement of the needle relative to the housing so that the needle moves with the housing when the housing vibrates in response to the operation of the engine.

Abstract: The present invention relates to a WC-cistern filling valve comprising a liquid inlet assigned to a supply line, a liquid outlet assigned to the cistern, and a closing element which is assigned to a valve passage opening arranged between liquid inlet and oulet and which is switchable by a float in accordance with the liquid level in the cistern for opening and closing the valve passage opening. It is the object of the present invention to provide a low-noise WC-cistern filling valve. This object is achieved in that at least a portion of the liquid outlet is shaped as a thread in the flow direction downstream of the closing element in such a manner that liquid is discharged with a swirl from the liquid outlet to the cistern in the opened state of the closing element.

Abstract: An adjustable height fill valve assembly for controlling water level in a storage tanks, comprises a lower riser assembly comprising concentrically disposed inlet riser and an outer riser housing, each having an upper end and a lower end, the inlet riser and the riser housing connected together at the lower ends, the inlet riser being adapted for mounting in a hole in a flush tank, an upper riser assembly comprising concentrically disposed inner supply tube and an outer tubular valve housing, each having an upper end and a lower end, a main valve seat at the upper end of the inner supply tube, the upper riser assembly telescopically mounted on the lower riser assembly, a latch between the riser housing and the tubular valve housing for latching the upper and the lower riser assemblies in selected extended and retracted positions, the latch disengageable upon rotation of the upper riser assembly in either direction from a central position, a valve housing cap having a bayonet lock connection for quick connect

Abstract: An adjustable valve is inserted in a tubular connection extending between an inlet lien and overflow pipe in the flush tank of a flush toilet. By adjusting the rate of flow through the valve, the level of water standing in the toilet is determined.

Abstract: In a housing to be fastened to the bottom of a flushing tank, a float, which is arranged approximately centrally on a closing member mounted displaceably in the housing, is arranged under a partition extending horizontally in the flush tank. A sealing body is arranged at a lower end of the closing member. The partition forms a unit with a chamber arranged on its underside, and the unit is detachably inserted from the top into the housing, which is open at the top. The present invention simplifies the automatic mounting as well as the inspection of the drain valve and the more universal and therefore less expensive use of the valve housing.

Abstract: The drain valve (1) has a valve tube (26) as well as an insert (37) with a float (38) in a valve housing (36). The float (38) is connected with the valve tube (26). In the bottom (49) of the insert (37) openings (39, 41a) are provided, which can be made to index by rotating a punched disk (40). For setting or resetting the flush water quantity, the punched disk (40) can be rotated by raising and turning the valve tube (26). Cogs (43) of the punched disk (40) will then engage in corresponding cutouts (45) at the lower end of the valve tube (26).

Abstract: An hydraulically assisted inlet valve is disclosed having a by-pass passage (32) which is permanently open. Preferably the valve has a valve body (13) reciprocally mounted in the inlet (4) and carried by a diaphragm (23). The by-pass passage preferably extends through the valve body (13) to apply inlet pressure to one side of the diaphragm.

Abstract: A device for metering the flow of water into the tank and bowl of any currently known tank toilet and providing a positive shut-off of the flow. When the toilet handle is turned, a linkage rotates a cam to force a stopper from its seat thereby commencing water flow. Water flows through a flow channel to be directed by a flow nozzle past a water wheel imparting a rotation thereto. The water wheel is gearably linked to the cam thereby rotating the cam. When the cam has rotated to position a cam repeat over the stopper stem, the stopper is reseated by the pressure of the water and water flow ceases. The distribution of flowing water between tank and bowl can be changed by altering the structure of a bowl fill assembly. The bowl fill assembly and a tank fill tube are attached to the outlet by a right angle manifold. The amount of water flow permitted is a function of the number of cam notches and flow nozzle size.

Abstract: This invention relates to an improvement of a float valve device, and more particularly to a float valve device including a water plug noise elimination and water seal assembly for flush toilets, with its major features of adding a noise eliminating water inlet unit at the water outlet structure of such a flush toilet, by using the bores surrounding the water inlet unit to produce the compliant flow during water intake by applying the flux dynamics principle to kill the noise, and by adding a triangle spring within the water outlet seat below a float crank rod to function as the indirect pivot of a float lever to achieve a load-saving purpose and to increase the water seal rate, and since the pivot is at lower position, the float is able to precisely open and close the water inlet to avoid the tear and wear of the water seal washer so as to prolong the service life of the water seal device while achieving the purpose of saving the water supply.

Abstract: A ball cock for a flush tank having a valve chamber connected with a discharge chamber. A float operated piston valve is mounted in the valve chamber to control water flow to the discharge chamber. A hush tube connected to the discharge chamber feeds the water to the bottom of the flush tank. A combined volume control and anti-siphon valve is mounted in the discharge chamber between the inlet and hush tube to regulate the rate of flow and to act as a vacuum break under conditions of negative pressure in the water supply line.

Abstract: A pilot-operated, diaphragm-controlled float valve assembly has a primary valve and a pilot valve operated by a float arm, a cavity for the main valve is formed between a split segment casing and is divided by a valve disc centrally mounted upon a flexible diaphragm into a lower, larger, pressure-differential chamber and an upper, smaller, pressure-differential chamber, both chambers being fluidly connected by a variable restricting orifice formed by a gap between an axial bore in the valve disc and a fixed guide rod for the disc. The top of the guide rod acts as a seat for a pilot valve; a lateral bore extends through the top of the guide rod and another through the base of the valve, enabling water to flow into both pressure differential chambers when the main valve outlet is held normally closed against its seat by bias of the diaphragm to prevent backflow under low pressure conditions.