Abstract: A device, and a container having such a device, is provided for filling the container with a predetermined weight of fluid. The device includes an input portion with a throat and a shoulder for introducing fluid into the container. A shut-off mechanism has a shut-off member and a control port. A control mechanism maintains one or more spheres in an inline configuration with the shut-off member such that fluid flow is permitted between the shut-off member and the control port as the device is disposed in an open configuration. A stabilizer is provided for each of the one or more spheres to maintain the inline configuration.

Abstract: A fluid flow rate control device, especially adapted for controlling the flow of IV fluid to a patient, comprises a first vented fluid chamber having an upper fluid inlet end with a hollow spike which enables fluid connection with a conventional fluid container. A free floating float valve in the first chamber blocks the flow of fluid into the first chamber from the fluid container according to whether or not the fluid level in the first chamber is at a preestablished fluid level, thereby providing a constant pressure head regardless of fluid level in the fluid container. A lower end of the first chamber is connected, through a flow regulator, such as a screw-type valve, to an upper inlet end of a second, vented, drip chamber, the lower end of which is adapted for connection to a discharge tube, such as an IV tube.

Abstract: A valve for maintaining a given level of liquid in a tank, reservoir, or other container having a liquid-gas interface. Said valve being actuated by a float that rises and falls along with the liquid in the container. Said valve float actuates a series of valves in sequence wherein the higher the float rises, the more valve ports are opened allowing a higher flow rate through the valve.

Abstract: A two-stage venting on-board refueling vapor recovery (ORVR) valve for controlling fuel tank venting to a storage canister during tank filling. A float actuated poppet has a small second stage venting hole therethrough. The poppet is mounted for relative movement with respect to a second stage vent valve member disposed on the float. During tank filling, venting is through a first stage relatively large flow area passage until rising fuel level causes the poppet to close the first stage vent flow area. Venting during continued filling is through the second stage venting hole in the poppet. After first stage valve closure relative movement or lost motion occurs between the first and second stage valve members.

Abstract: A humidifying system particularly for incubators and a process for humidifying incubators is disclosed. The system includes a float valve with a sleeve-shaped float housing with a float body axially displaceable therein as well as a throttle valve influencing the flow of liquid. The throttle valve is actuated depending on the relative movement of the float body in relation to the float housing, and by the external diameter of the float body and the internal diameter of the float housing being selected to be such that a capillary gap wetted with liquid is present. With this construction, the reference level for the setting of the liquid level remains unchanged due to the float valve being designed as a hollow float body axially displaceable in a float housing with a liquid-filled, annular capillary gap between the float body and the float housing.

Abstract: An automatic drain valve for discharging accumulations of fluids and foreign materials from a fluid handling system. The drain valve (10) comprises a reservoir (14) defining a reservoir volume (15) and a thru-port (28), in fluid communication with the reservoir volume (15), that defines an inlet (30) and terminates in a drainage valve (82) for flowthrough communications with a fluid handling system. An actuating mechanism selectively actuates a valve operator. In the preferred embodiment, a pilot valve (41) is mounted in the reservoir (14) for selectively communicating pressurized air to a valve operator (57), such that the valve operator selectively opens and closes the drainage valve (82) communicating with the outlet (88) of the reservoir (14) for selectively draining the reservoir. The pilot valve (41) includes a sensor tube (42) which defines a valve seat (44) and includes a magnetized valve plug (46) for selectively engaging the valve seat (44), the valve plug (46) having a selected magnetic polarity.

Abstract: A device for providing remote indication of the opening of a weighted pallet type tank vent in which a permanent magnet is attached to the end of the pallet guide shaft distal to the pallet. A magnetic induction sensor is secured to the outside of the shaft guide to sense movement of the magnetic field produced by the magnet and produce an electrical signal which may be transmitted to a remote location to indicate that the pallet has opened and relieved pressure in the tank.

Abstract: A straight trap toilet apparatus mainly comprises a main body with a straight trap, a piston, and a toilet bowl. The water outlet of the main body is connected to a waste pipe, and the top of the main body is mounted below the toilet bowl. The main body has a water valve, wherein one end of the water valve is connected to an inlet tube connected to a water-faucet, and the other end of the water valve is connected to an outlet tube that corresponds to the spurt water hole of the toilet bowl. In normal condition, water flows from the outlet tube into the toilet bowel and the main body. A water tank is in fluid communication with the main body by a linking tube such that the water in the toilet bowel and the water tank are at the same level. The motion of the float ball will control a valve handle to control the water valve for controlling the water intake. The water from the outlet tube may gather together in the main body, the toilet bowel, and is in fluid communication with the water tank by a linking tube.

Abstract: A float valve having a pair of valve plugs mounted on a single valve stem employing a flexible or pivoting couple between the float and the valve stem that allows the float to tilt and move laterally with respect to the axis of movement of the valve stem without affecting the alignment of the valve plugs in relation to their respective valve outlets. This flexible couple might also allow for some free movement of the float in the direction of the axis of movement of the valve stem. In one embodiment the valve plugs have ported sealing surfaces that allow gradual starting and stopping of the flow of fluid through the valve outlets.

Abstract: An valve assembly for automatically shutting off the flow of a pressurized liquid to a storage tank includes a cam that is rotated in response to the level of a liquid in the storage tank. A follower moves a poppet valve axially with a housing as a nonlinear function of rate of cam rotation. The poppet valve is moved to a closed position to terminate flow of a liquid to the storage tank whenever the liquid level within the storage tank reaches a predetermined level.

Abstract: An above-ground tank auto-limiter is provided for preventing the overflow of fluid in storage tanks. The auto-limiter includes a valve assembly insertible downward through the top of a fill pipe of the fuel storage tank. The valve assembly has a cylindrical valve housing providing a fluid flow passage directing fuel downward into the storage tank under pressure. A hollow cylindrical float is provided in the valve assembly and is coaxially mounted along the outside surface of the valve housing leading into the storage tank. The float moves vertically to slide freely along the lower portion of the valve housing with the fluctuation of the fuel level within the tank. A series of linkage assemblies communicate the cylindrical float to valve doors. The valve doors prevent any fluid flow from passing through the fluid flow passageway when the doors are in the closed position.

Abstract: An automatic watering device for use with a stationary water reservoir includes an elongated hollow housing fixedly positioned relative to the reservoir, an elongated pipe having a first end extending into the housing and an opposite second end connected to a source of water, and a water control valve disposed within the housing and connected to the first end of the pipe. The water control valve is adjustably positionable within the housing to correspondingly set a desired water level within the reservoir. The automatic watering device of the present invention is particularly useful for maintaining a supply of water in an animal watering trough since the water control valve is protected from abuse at all times by the protective housing.

Abstract: A device, and a container having such a device, is provided for permitting filling the container with a predetermined weight of the fluid. The device and container include a main channel to introduce the fluid into the container at a fill pressure; a detector mechanism to detect a "filled" condition based on fluid weight; and an fluid-weight control mechanism to automatically prevent introducing fluid into the container in excess of the "filled" condition. A compression spring offsets part of the weight of a displacer such that the displacer becomes buoyant as the container becomes "filled". The displacer has a seat mechanism that sealingly engages an orifice mechanism creating a differential pressure, substantially less than the fill pressure, across a control device causing closure of the main channel.

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: A liquid flow control apparatus (5) suitable for handling milk from a milking machine, comprising a first chamber (10) that comprises an inlet (11) for the milk, an outlet (12) for connecting to a vacuum pump, and an outlet (14) for the milk to flow by gravity to a second chamber (13). The first chamber (10) and the second chamber (13) are in communication with each other by means of the outlet (14) at the bottom of the first chamber (10). The second chamber (13) has a float valve (23) that closes off communication between the first chamber (10) and the second chamber (13) depending on the level of liquid in the second chamber (13). A conduit tube (18) for air communication is disposed between the first chamber (10) and the second chamber (13). A second float valve (17b) closes off communication via the conduit tube (18) between the two chambers. A third chamber (21) has two valves with one valve (26) opening to the atmosphere and a second valve (20) opening to the second chamber (13).

Abstract: An oil level regulator is provided for controlling the oil level in the crankcase of one or more refrigeration compressors or the like. The regulator has a closed chamber for containing the oil. An inlet valve assembly extends into the chamber and includes a float-controlled valve for introducing liquid into the chamber as necessary to maintain the oil level in the chamber and compressor crankcases. The inlet valve assembly includes a vertically telescoping piston for adjusting the float valve and the oil level regulator in the regulator chamber. The piston is moveable from outside the chamber in response to rotation of a concentric stem having a bore through which oil flows into the chamber. The float valve includes a lever bracket which extends horizontally across the chamber to contact a top of a float ball. The lever bracket pivots to cause side-to-side motion of a valve needle against a valve seat to control oil flow into the chamber.

Abstract: An above-ground tank auto-limiter is provided for preventing the overflow of fluid in storage tanks. The auto-limiter includes a valve assembly insertible downward through the top of a fill pipe of the fuel storage tank. The valve assembly has a cylindrical valve housing providing a fluid flow passage directing fuel downward into the storage tank under pressure. A hollow cylindrical float is provided in the valve assembly and is coaxially mounted along the outside surface of the valve housing leading into the storage tank. The float moves vertically to slide freely along the lower portion of the valve housing with the fluctuation of the fuel level within the tank. A series of linkage assemblies communicate the cylindrical float to valve doors. The valve doors prevent any fluid flow from passing through the fluid flow passageway when the doors are in the closed position.

Abstract: A valve mechanism for supplying liquid to a container until the surface of the liquid reaches a predetermined level includes a valve body disposable in the container and defining a cavity, an inlet port for communication with a liquid source and an cutlet port communicating with the interior of the container. A valve seat is provided in the cavity adjacent to the outlet port, and a valve member in the shape of a ball is disposed within the cavity and moveable between a normal closed condition and an open condition relative to the valve seat for respectively closing and opening the outlet port. A guide tube depends from the valve body in communication with the outlet port and has a float coupled to it. A valve actuator includes a base seated in the container and a rod extending upwardly therefrom into the guide tube. The actuator rod is engageable with the valve member for holding the valve member in its open condition when the surface of the liquid in the container is below the predetermined level.

Abstract: A quick release connector enables replacement of a toilet tank valve by one having little, if any, knowledge of repair or skills relating to plumbing. The toilet tank valve includes a quick release connector coupling the toilet tank valve to a source of water within the toilet tank. The toilet tank valve may be quickly and easily replaced by manipulation of the quick release connector by the user's fingers without the necessity of mechanical tools or the like.

Abstract: A valve assembly for automatically shutting off the flow of a pressurized liquid to a storage tank includes a cam that is rotated in response to the level of a liquid in the storage tank. A follower moves a poppet valve axially with a housing as a nonlinear function of rate of cam rotation. The poppet valve is moved to a closed position to terminate flow of a liquid to the storage tank whenever the liquid level within the storage tank reaches a predetermined level.

Abstract: Water treatment system includes means for mixing ozone generated by the system with untreated water. The ozone and water mixture is delivered to a contact chamber at a pre-selected rate. As the mixture of ozone and water is delivered, ozone and other gases are released from the water into the chamber. Gas accumulates at the upper end of the chamber, forcing the water level down and increasing the pressure in the chamber. A float assembly is normally in a closed position due to the buoyancy of the float assembly and the level of the water. As the water level decreases with the accumulation of gases, the float assembly is held in place by the pressurized gas surrounding the float assembly. Finally, the weight of the float assembly overcomes the float's buoyancy and the gas pressure holding the fluid assembly in place. The float assembly then drops, opening the upper end of the chamber to atmosphere. Gases which have accumulated and stratified at the upper end of the chamber are released to atmosphere.

Abstract: Apparatus for controlling the level of a fluid in a reservoir. A reservoir has a trough within which is a valve means comprising a hollow cylindrical body having inlet and outlet apertures in fluid communication with a fluid source. A valve shuttle assembly slidingly connected to the valve comprises an "O" ring seal which defines a sealing region. The sealing region can occlude the fluid inlet aperture or permit fluid to pass to the outlet aperture. The valve shuttle is interconnected to a float which rises and lowers depending on the fluid level in the reservoir.

Abstract: A combination air and vacuum valve comprises a valve body (20) including a fluid inlet (25) and gas outlet (26), a valve poppet (8) guided to open and close said outlet (26), a float (19) and rod (18) connected operatively thereto in a vertical orientation for allowing said valve poppet (8) to close and open said gas outlet (26), a seat frame (5) for guiding stem of said poppet (8), a fulcrum pivot lever mechanism to which said float rod (18) is attached and which also contains a valve poppet seat (9) for pushing said valve poppet (8) via its stem to close said outlet (26), a fulcrum pivot axis of said fulcrum pivot lever mechanism containing a torsion spring (11); said spring (11) providing an additional upward force which assists the buoyancy effect of the float (19) in closing the valve. As a result, a smaller float may be used to achieve the same buoyant effect which would normally require a larger float.

Abstract: A fountain faucet is comprised of a housing defining a water chamber and having an inlet communicating the water chamber and an outlet communicating the water chamber through an opening, a float valve disposed in the water chamber and movable between valve open and valve closed positions. A control unit engaged in the housing by means of a thread operable to retain the float valve in its closed position or allow the float valve movable freely between the valve open and valve closed positions.

Abstract: A toilet tank ball cock is designed for use in a toilet tank having an operating lever, a flush valve controlled by the operating lever and a water supply, with the ball cock regulating the supply of water to the tank. The ball cock includes a vertical riser column communicating with the water supply and a water control valve regulating the flow of water from the water supply to the toilet tank. There is a float movable on the riser column and coupled to the water control valve such that downward movement of the float to a selected level opens the water control valve to fill the toilet tank and upward movement of the float to a selected upper level closes the water control valve to stop filling the tank. The float has openings therein in communication with the tank interior. The openings are located to provide for water flow from the float as the water level in the tank drops.

Abstract: A float-type refrigerant control device meters the flow of saturated refrigerant liquid condensate to a subsequent stage from an outlet of a sump in a refrigerant condenser. A float in the form of a metal shell open at the bottom is slidably positioned on an upright, generally cylindrical standpipe which is mounted at the outlet of the sump. A metering sleeve situated within the standpipe is joined to the float for axial travel with the float. One or more metering slots penetrate the standpipe near its lower end, and these are uncovered by the sleeve as the float rises to permit the liquid to flow out through the sump outlet. A vapor injection duct supplies refrigerant vapor from a high pressure source to the float to keep the same replenished with vapor, thereby maintaining a positive buoyancy relative to the saturated refrigerant liquid condensate in the sump.

Abstract: A control valve includes a vertical housing having an upper float chamber, a lower valve chamber, and a valve seat support which is provided between the float chamber and the valve chamber, defines a passage communicating the float chamber and the valve chamber and has a bottom valve seat above the valve chamber. An inlet conduit extends outwardly from the housing and has an inlet and an outlet communicated with the valve chamber. An outlet conduit extends outwardly from the housing and has an inlet communicated with the passage and an outlet. A shaft is movable vertically, is provided inside the housing and has a valve block mounted on a bottom end of the shaft. An upper and a lower stop are respectively fixed on the shaft. An upper and a lower float are respectively movably sleeved around the shaft between the upper and lower stops. A perforated partition is mounted inside the housing between the upper float and the lower float.

Abstract: A drain valve including a housing engaged on a base, compressed air may flow into the housing via an inlet of the base, a casing disposed in the upper portion of the housing, a piston slidably engaged in the casing, a rod extended downward from the piston into an outlet of the base for blocking the outlet, a puncture formed in the upper portion of the casing, a plug disposed for blocking the aperture and can be opened by a float. The condensate is accumulated within the lower portion of the housing. Most of the parts are disposed within the upper portion of the housing.

Abstract: A float actuated valve for automatically shutting off the flow of fluid into a storage tank when the tank is filled to a predetermined level includes a pair of shutter plates movable transversely across the flow passage from an open position wherein the plates are retracted clear of opposite sides of the passage and a fully closed position in which the plates project into and cooperatively block the passage. A spring biased rotary trip plate underlying the shutter plates controls actuation of the shutter plates and may be held by first and second detents in rotative positions locating the shutter plates in the fully closed or a partially closed position. A lower float located within the tank releases the first detent to cause the trip plate to drive the shutter plates from the fully closed to the partially closed position when the level of fluid in the tank rises to a first level.

Abstract: The mechanism comprises an inlet valve assembly which admits water into a toilet tank under the control of a valve plug mounted on the end of a vertical axle having a float on its upper end. The valve plug is unseated, to admit water, when the axle is tilted, and the plug is pulled into seated position by the float when the tank is filled. A drainage buoy, in cooperation with a buoy base, allows discharge of water from the tank when the buoy is pulled from the base. Pull chains are used, from a toilet handle, to tilt the axle and pull the buoy. The inlet valve includes a water pressure reducer, and a non-return valve assembly to prevent return of water to the water supply in the event of a loss of water supply pressure.

Abstract: An inlet valve for a water tank includes a float, a housing, and a control device. The float is vertically slidable along the control device which has an adjusting mechanism and a retaining ring for respectively controlling the upper and the lower limits of the float. The housing is connected to a water supply and has a hole and two outlets provided for the water to flow into the water tank. The control device has a block element which can be actuated to block the hole of the housing. The adjusting mechanism can easily adjust the upper limit of the float relative to the control device so that the water level in the water tank can be adjusted easily.

Abstract: A float system for a ball type accumulator includes a circular hollow float member which surrounds the float travel guide rod in the ball type accumulator. Connecting the float member to the vertical guide rod is a ball member which is located in the center of the float. A circular arcuate band surrounds the ball member thus allowing the float to tilt with respect to the vertical guide rod as the level of the fluid tilts within the accumulator. The tilting of the float prevents the float from flooding when the ball type accumulator is moved.

Abstract: An emitter for receiving water from a trickle irrigation system and emitting the received water at a trickle flow rate to an area to be irrigated. The emitter includes a float controlled water inlet shutoff valve for receiving water from the trickle irrigation system and supplying it to a housing to establish a water supply therein and maintain the water supply at a predetermined substantially constant level above at least one water outlet opening of predetermined size formed in the housing to provide a pressure head which interacts with the size of the water outlet opening to determine the trickle output flow rate of the emitter.

Abstract: A two function tank valve according to this invention includes a vertically oriented supply tube or conduit with an upper opening. A valve seat surrounds the opening, and a valve seal is movable against it and away from it. Water level responsive means determines this valve setting so the valve can be opened to fill the tank, and can be closed when the tank is full.

Abstract: A drain assembly for aircraft which is operable to provide a drainage outflow course for discharge of cabin collecting liquids in an aircraft to the outside environment when the aircraft is at ground level or operating at altitudes up to a certain height but which is operable to seal tight that drainage course when the aircraft is operating above that certain height so that cabin depressurization cannot occur through the drainage course.

Abstract: A combined air release and vacuum breaker valve for pipelines has a ball float that acts directly upon both the vacuum breaker and air release valves which are concentric with one another and axially aligned with the ball float. To avoid adverse effects of high velocity flow of water into the float chamber, which tends to initially counteract buoyancy of the ball, a flow disturbing screen is connected to the lower end of the ball. The direct acting ball is connected to the pressure release valve member by means of a resilient lost motion connection, so that slight bouncing of the ball caused by turbulent flow in adjacent areas of the pipeline will not cause the air release valve member to bounce on and off its seat.

Abstract: Disclosed is an air volume control for use with a flowing water line to control the quantity of air sucked by venturi action into the water line. The air volume control comprises a tubular valve body with a common member defining co-axial oppositely directed valve seats, one seat of which is automatically closed by a float valve in the event of reverse flow of water or back pressure of air into the valve body and the other seat of which is closed by a control valve when a regulator knob is rotated clockwise to the "off" position. In rotating the regulator knob counterclockwise to its "on" position, a cross pin follower of the regulator knob engaged with cam surfaces of the control valve unseats the control valve from its valve seat. Air is sucked into the water line through air entry ports in the valve body that are upstream of the control valve and float valve. Closing of either the control valve or float valve close off such air being sucked downstream past the valve seats into the flowing water line.

Abstract: There is disclosed a vent for venting air from a system of the type which conducts fluid under pressure. The vent includes a chamber, a ball valve within a top wall of the chamber, and a float within the chamber which is arranged for vertical movement therein. A lever which carries a valve ball element is arranged for pivotal movement against the inner surface of the chamber top wall for disengaging the ball element from the valve when the valve is opened. When the valve is opened, the lever and ball element fall away from the valve. When the vent closes, the float acts upon the lever for guiding the ball element into seating relation with the vent valve.

Abstract: A system for maintaining a preselected water level in e.g. a swimming pool comprises a chamber (6) in communication with the pool such that the water level in the chamber corresponds to that of the pool. The chamber contains an adjustable over flow tube (15) and a vertically oriented water supply line (19) having a diaphragm valve (20) and surrounded by an annular float (29), the valve being actuated by a height adjustable overhead actuator bar (23).

Abstract: A liquid level control apparatus which detects a liquid level in a tank employed, for example, in ice making equipment, to thereby trigger a control operation. The level control apparatus comprises a tank containing a body of liquid, a float movable in response to the vertical movement of the surface of liquid within the tank, a hollow case having a closed top and an open bottom, and a guide member disposed within the case for guiding the vertical movement of the float. The hollow case is arranged so that the open bottom thereof is closed by the rising liquid to thereby from a hermetically closed chamber within the case. An upstanding tubular member extends into the hollow case such that the lower end of the tube defines a level of liquid at which the hermetically closed chamber is formed. The chamber thus formed is effective for preventing the guide member from being immersed in the liquid to assure smooth movement of the float.

Abstract: A flushing system for rapidly delivering a given volume of water supplied to an accumulating chamber (5) from an automatically or manually operated valve (6) has a float-controlled discharge valve (19) which is arranged to be opened when said given volume of water has been delivered to the accumulating chamber (5) and the float is located at a corresponding level in said chamber. A supply pipe (13) extends downwardly in the accumulating chamber (5) towards the outlet (3), and a valve housing (19) is slidably arranged, together with the float, on the water supply pipe. In a closing position of the valve housing, the lower edge part of the valve encircles the outlet. In an opening position of the valve housing, with water in the accumulating chamber, the valve housing is lifted from the seating. The lower end of the supply pipe is formed with a valve body (17) arranged, together with the valve housing, to form a pressure chamber (24) having a leakage opening.

Abstract: A ballcock is constructed with upper and lower housing members which are joined by a bayonet-type fitting. The juncture of the upper and lower members defines a valve chamber which sits atop the orifice of a vertical inflow tube carrying water from below the lower housing member. A valve in the valve chamber controls the flow of water out of the orifice. The valve includes separate, spaced upper and lower resilient valving members that provide a pressure chamber. Pressure in the chamber is controlled by a spherical-head metering pin passing through apertures in the upper and lower members. A slip-on silencer telescopes over the orifice and defines, with the exterior of the inflow tube, a quieting passage. The quieting passage has an annular intake at the top and terminates below in a pair of downward directed nozzles. The spherical-head metering pin makes a ball-and-socket connection with a lever. The lever is resiliently connected to the upper housing member and operated by a metal rod connected to a float.

Abstract: An improved sewer relief valve which is vandal-proof and automatically opens responsive to a back flow of sewage and drain water within a plumbing system.

Abstract: The housing of the filling device mounted on the tank wall defines a chamber wherein a spring-activated cut-off valve is mounted. This valve comprises a head cooperating with a valve seat at the end of a supply duct opening into the chamber and a piston-forming body separating the chamber into two volumes. The housing presents openings between the tank inner volume and the frontmost chamber volume, and a duct between the backmost chamber volume and the tank inner volume. A no-return valve, which only lets liquid to the tank inner volume, is mounted in this duct. At the end of this duct a valve controlled by the float in the tank is mounted.

Abstract: A valve assembly is adapted to control the water level within a toilet flush tank, by gravitational bodily movement of a hush tube and a valve housing integral therewith, responsive to emptying of the tank. A float coaxial with and secured fixedly to the hush tube is weighted in a manner to cause the gravitational motion of the hush tube and valve housing, when the float loses buoyancy as a consequence of the emptying of the flush tank contents. The gravitational movement of the float, hush tube, and valve housing in respect to an upstanding fill tube upon which these elements of the assembly are mounted for up and down sliding motion, causes actuation of a pilot reed valve. The pilot valve acts to break a valve seal between the fill tube and the valve housing, to an extent such that a very small force used in the opening of the pilot valve is sufficient to allow the normal line pressure to assert itself for full unseating of the valve and a consequent normal refilling of the flush tank.

Abstract: A retrievable float valve hanger tool assembly provides a hanger sub having a first upper connection for attaching the hanger sub, for example, threadably, to a drill string or work string. A second lower connection means on the sub provides both external and internal threaded (for example) connections, which allow the sub to be connected on its inner threads to a float valve canister and at its external threads to an extension which forms a protective housing about the float valve and its valve canister during operation. The device places the float valve below the joint of the sub and the extension so that an explosive charge can be detonated at the joint allowing easy removal of the float valve from the drill string in the event that the drill pipe becomes stuck. A continuous bore through the assembly allows fluid circulation through the tool in the work string and also allows the explosive charge to be lowered by wireline, for example, to the tool assembly at the appropriate joint.

Abstract: A valve, of compact design, permits the opening and blocking of a liquid flow whose level is directly proportional to the operation of the valve, with the use of conventional floats being completely abandoned, and with the hydraulic mechanism of said valve being activated in different manners, according to the origin of the source of flow, which can be produced either through the upper part of the tank or from the bottom. There are three embodiments of the valve.

Abstract: A normally-open two stage float valve for use with a suction tube leading om a vehicle fuel tank. As the fuel tank begins to run dry it is desired that the float valve close off the tank to the suction force. The valve of this invention includes a float-operated pilot valve element that equalizes forces on the opposite faces of the main valve element as the float moves through its actuation stroke. A lifting head is associated with the pilot valve element for mechanically lifting or lowering the main valve element relative to the main seat when the forces have been equalized.

Abstract: A water level control for swimming pools is provided in the form of a casing for suspension on a ladder, pool wall, or pool edge having a float-controlled valve detachably coupled with a pressure water supply and adapted to open as the float drops a predetermined distance within the range of about 3/4 inch to 1 inch, said casing having a transverse partition intermediate its upper and lower ends which supports the valve and float assemblage, and said partition and casing bottom being apertured to permit egress of water fed through the valve while in open position while at the same time acting as baffles to maintain an essentially stable water level within the casing in spite of the wave action which may prevail in the surface of the pool water. Positioning of the casing is facilitated by external high and low water level markings which align with the water levels within the casing at the upper and lower limits of float movement.

Abstract: An improved sewer relief valve which is vandal-proof and automatically opens responsive to a back flow of sewage and drain water within a plumbing system.