Abstract: Venting circuit for a liquid tank, the upper wall of which comprises at least two regions liable to contain pockets of gas, the said circuit consisting of at least one ventilation tubing connecting ventilation points located in the upper part of the regions and a vent, and having at least one siphon-shaped lower part connected via a pipe to a point under vacuum inside the tank so as to allow the liquid present in the venting circuit to be removed, the vacuum being created by the pump for drawing off the liquid.

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 refueling fuel level responsive control valve with a two-stage closing operation providing an initial soft shutoff cue to the filler nozzle operator, and a subsequent final shutoff after a limited amount of "roundoff" filling to a maximum fuel level. The control valve includes two float-operated valve elements which close serially in response to initial shutoff and final shutoff refueling fuel levels. The initial shutoff partially closes the control valve to create a temporary shutoff-inducing increase in fuel tank pressure. Final shutoff occurs after allowing a few round-off "clicks" of the filler nozzle to fully close venting through the control valve.

Abstract: A fuel cut device has a body in which a gas vent passage having a plurality of ports is formed. A connecting portion is formed around one of the ports in a laterally oriented manner for fixing a separate two-way valve onto the fuel cut device. A plurality of thus-configured fuel cut devices are mounted within a fuel tank. The fuel cut devices are mutually connected by means of pipes fitted into the corresponding ports. Unused ports are plugged. The two-way valve is connected to the connecting portion of the fuel cut device adapted to communicate with an external device. The pipes used to connect the fuel cut devices does not include a connection or a branch.

Abstract: A fuel vapor control apparatus halts deterioration in operating characteristics of a fuel control valve at the time of fuel supply and prevents fuel vapor from being discharged into the atmosphere through a filler pipe. The fuel vapor control apparatus prohibits fuel vapor from flowing toward a filler pipe by closing a fuel drop passage at the time of fuel supply. A fuel vapor control valve is configured as a diaphragm valve made of a flexible material, and a diaphragm holder moving integrally with the diaphragm valve is provided at the center thereof. Furthermore, the fuel drop passage as a communication hole is formed in the diaphragm portion at a location radially outward of the diaphragm holder, which is provided with an umbrella portion for opening and closing the fuel drop passage.

Abstract: A refueling valve for a motor vehicle includes a body connected to the upper wall of a fuel tank in vertical depending relationship. The body has a cover with a vapor exit passage adapted to be connected to a fuel vapor storage canister and a portion depending from the cover that has a vapor exit port that communicates with the fuel tank interior adjacent the upper wall of the fuel tank. A vent tube has one end connected to the vapor exit passage and an opposite end that communicates with the vent exit port and defines a valve seat. The vapor exit port is located with respect to the valve seat so as to separate liquid fuel particles from vapor flow during fuel fill. The valve seat is closed by a float valve when the fuel tank is full.

Abstract: A multi-level fuel pickup system has a float valve in communication with a first fuel passage having an open end disposed at a first height within the fuel tank spaced from the bottom of the fuel tank to prevent fluid flow through the first fuel passage when liquid fuel is absent adjacent its open end. A second fuel passage communicates adjacent the bottom of the fuel tank and below the first height and fuel is drawn through this fuel passage when a low level of fuel remains in the fuel tank. A fuel control valve is manually adjustable to control through which of the fuel passages fuel is drawn. Preferably, each of the fuel passages is at least partially formed in a valve body mounted within the fuel tank and the float valve comprises a spherical float received in a bore in the valve body and is responsive to the level of fuel within the bore.

Abstract: An improved weldable vapor vent valve assembly comprising a non-weldable (heat-resistant) valve body and a weldable connector portion attached to an upper end of the valve body for welding onto the outer surface of a polymeric fuel tank. The weldable connector portion secures the valve body in place using vertical anti-leak ribs extending downwardly from the weldable connector and upwardly from the valve body which mate axially in an interlocking, sealing fit. The anti-leak ribs form a labyrinth-type seal that prevents liquid fuel and fuel vapor from leaking between the assembled portions of the vent valve assembly.

Abstract: An apparatus is provided that includes a valve container with a vapor inlet adapted for communicating with an interior region of the fuel tank and a vapor outlet, a baffle including an upper end coupled to the vapor inlet, an open lower end spaced-apart from the upper end, and a skirt extending between the upper and lower ends, and a float valve disposed in the valve container and movable between an opened position allowing flow of fuel vapor through the vapor outlet and a closed position preventing flow of fuel vapor through the vapor outlet. The skirt of the baffle includes at least one slot therethrough and the float valve is positioned to lie between the vapor inlet and the slot of the baffle when in both the opened and closed positions.

Abstract: A vent device connectible in a fill pipe of an underground fuel storage tank having a cylindrical housing with a drop tube and a J-shape tubular fitting with two open ends. The first open end is open within the drop tube and directed toward the underground fuel tank and the second open end is exposed through the wall of the cylindrical housing into an upper portion of the underground fuel storage tank. The tubular fitting has an expansion chamber vertically disposed between the two open ends for holding a float ball therein. The float ball is confined within the expansion chamber by a lower seat of the chamber and a barrier extending across the diameter of the chamber to prevent the float ball from sealing the upper seat of the chamber.

Abstract: Pressurized fluid apparatus including a pressurized fluid container, a pipe arranged for flow therethrough of the pressurized fluid into the container, a valve operatively connected to an end of the pipe disposed in the container, and a float attached to the valve, wherein the float is buoyed generally upwards by the pressurized fluid filling the container, such that when the float has been moved a predetermined amount, the float closes the valve and substantially stops flow of the pressurized fluid into the container, and wherein the float is insertable through an upper opening of the container, and wherein the valve is rotatably attached to the pipe, the valve being closed by an angular upward movement of the float, characterized by the valve including a tube with a longitudinal bore having a longitudinal axis formed therein, and a piston slidingly disposed in the tube, wherein only when the float is generally perpendicular to the longitudinal axis, the piston sealingly abuts an internal end face of the tub

Abstract: A fuel gas scrubber to remove liquids including a float activated shut off valve includes a pressure vessel with a dry gas outlet aperture extending through the top of the vessel as well as a wet gas inlet near the top of the vessel and a liquid outlet near the bottom of the vessel. The fuel gas scrubber including a float activated shut off valve also includes a valve seat positioned within an interior bore at a first end of a tubular housing. A float is encapsulated within the interior bore. The float is axially movable between the first end and a second end of the tubular housing. The float has a valve seat end facing the first end of the hosing and a liquid engaging end facing the second end of the tubular housing. A valve member is positioned on the valve seat end of the float. A liquids inlet is provided at the second end of the tubular housing.

Abstract: A vault suitable for underground burial, having a vent capable of passing air into and out of the vault and excluding rising external water from entering the vault through the vent, and a valve assembly for accomplishing this exclusion. The vault has walls enclosing an open interior storage space. The vent has a conduit communicating between the interior space and the outside atmosphere. The valve assembly is located at the free end of the conduit. The valve assembly comprises a vertical, cylindrical chamber having a lower opening open to the atmosphere and an upper opening connected to the conduit. Two spherical floats of unequal diameter are occupy the chamber, with the smaller float located above the larger float. The upper float is a valve cooperating closely with a valve seat located at the upper opening. A grate or screen retains the floats in the chamber. When rising waters threaten to flood the vault, the floats rise, the upper float seating in the seat and closing the upper opening.

Abstract: A control valve for an onboard refuel vapor recovery system employing two bleed orifices in the body of the control valve that are effective to provide different time intervals for continuing to dispense fuel into the fuel tank after an initial fill nozzle shut-off.

Abstract: A valve assembly includes a housing and a float. The housing is constructed and arranged to inhibit movement of the float between a resting position to a position where it is situated in its valve seat, unless a selected liquid volume within the valve housing is attained. In one embodiment, a series of projection members or rings creates a tortuous path, such that there is no clear path for the float to reach the valve seat. In another embodiment, vacuum pressure is created between the float and its cup support. Still other embodiments utilize magnets, springs, linkages, and bent wires. Methods for preventing liquid ingestion into an engine through an air intake are also provided.

Abstract: A valve device is adapted to be provided on top of a container (1) to prevent the flow of a liquid from said container. Said container may form a part of a cleaning device. The valve device comprises a passage (10) extending in a direction (x) being essentially vertical when the valve device is in a normal working position and having an orifice (11) at one end. The orifice is surrounded by a surface (14). Moreover, the valve device comprises a disk (15) having a disk diameter exceeding the diameter of said orifice and support means (17, 18) to support the disk (15) beneath said orifice (11) at a distance from said surface such that the disk is movable to abut said surface when said direction (x) deviates from said vertical direction by a predetermined angle.

Abstract: A differential pressure regulating valve is disclosed which improves sealing performance when the valve closes. The differential pressure regulating valve has a diaphragm and a guide. The guide limits the moving direction of a retainer. A projecting part and an engaging hole engage with one another and reduce deformation of the diaphragm by tolerating a relative movement between the diaphragm and the retainer. A liquid shut-off valve device is also disclosed which incorporates the differential pressure regulating valve and has stable operating characteristics.

Abstract: A combination fuel tank rollover valve, float actuated fill vent shutoff and tank vapor pressure relief valve assembly in a common housing for assembly into a single access opening in the tank. A header containing the pressure relief valve is sealed over the tank access opening and has an extension member attached to the undersurface of the header with an extension neck extending through the access opening. An interchangeable vent float valve subassembly is attached to the end of the neck before attachment of the extension to the header and assembly on the tank. Tanks of different depth can be accommodated simply by using extension members having a correspondingly different length necks, while the float valve subassembly and header are interchangeable.

Abstract: A fuel vapor vent valve for a motor vehicle is connected to an upper wall of a fuel tank in vertically depending relationship. The valve has a cover with a vapor exit passage connected to a fuel vapor storage canister and a body depending from the cover. One embodiment has a vapor exit port that communicates with the fuel tank interior adjacent the upper wall of the fuel tank. A vent tube has one end connected to the vapor exit passage and an opposite end that communicates with the vent exit port and defines a valve seat. The vapor exit port is located with respect to the valve seat so as to separate liquid fuel particles from vapor flow during fuel fill. The valve seat is closed by a valve element attached to a float when the fuel tank is full. Several further embodiments of the valve have the body connected to the cover to accommodate side impacts to the fuel tank.

Abstract: An automatic vent has a cup including a bottom wall, a side wall, an open top, and an inlet for introducing fluid into a compartment defined by the bottom and side walls. A valve assembly of the automatic vent includes a cap disposed over the open top of the cup. The cap has a body with an upwardly facing surface, a downwardly facing surface, a bore formed within the body for enabling fluid communication between the compartment and atmosphere, and an annular rim provided around the bore on the downwardly facing surface. A lever arm is hingedly connected at one end thereof to the body of the cap adjacent the annular rim.

Abstract: An onboard vapor recovery system for a vehicle fuel system having a fuel tank, a filler neck dynamically sealed by high pressure fuel flow from a filler nozzle, and a vapor recovery apparatus such as a carbon canister. The system includes a liquid level operated control valve which shuts off refueling with a two-stage closing operation providing an initial soft shutoff and a final shutoff. The system also preferably includes a valve in the fuel tank to maintain a predetermined pressure head sufficient to hold the system closed against further refueling at least temporarily, and a positive action, one-way check valve in the lower end of the filler pipe to prevent spitback of fuel from the pressurized tank once refueling has ceased.

Abstract: A vent valve for a gasoline tank has a multi-piece valve housing that is inserted into the tank through a tank wall opening. The housing includes a valve member and a cap member that has a flange that is ultrasonically welded to the gasoline tank and a coupling skirt that has minimal protrusion into the gas tank. The coupling skirt fits into upper portion of the valve member and has keyways that receive inwardly projecting lugs of the valve member to couple the valve and cap members to each other. The valve and cap members are retained in the coupled position by resilent cantilevered lock fingers of the valve member that engage notches in the bottom of the coupling skirt. In a modification the notches coincide with entrance portions of the keyways. The cap member of a second embodiment has a coupling skirt with keyways that fit over an upper portion of the valve member that has outwardly projecting lugs and resilient lock fingers that are cut out of the wall of the valve member.

Abstract: A safety valve for a circuit for ventilating a liquid tank, preventing liquid from being entrained and comprising a casing which opens out inside the tank under the upper wall of the latter and the upper part of which is connected to the ventilating circuit by means of an orifice, including:a) a needle capable, in the high position, of shutting off the orifice located in the head of the valve;b) a float associated with the needle and capable of sliding vertically inside the casing;c) structure for supporting the float and for displacing the said float upwards in the event of an inclination of the casing;d) a stem extending the lower part of the casing inside the tank under the means for supporting and displacing the float.

Abstract: A fuel level responsive vent valve assembly adaptable to a variety of different mounting requirements in a vehicle fuel tank. In general, the vent valve assembly comprises a standard, valve body, a top cover adapted to mate with the standard valve body at a vent outlet interface for a sealed vapor venting connection, and separately formed longitudinal connector means having a preassembly end for preassembly to a standard interface on the lower surface of the top cover, and an assembly end for longitudinally locking the standard valve body to the top cover. The standard assembly end of the longitudinal connectors can be varied in length to accommodate different valve height mounting requirements in different fuel tank applications. In a preferred embodiment the longitudinal connectors comprise metal pins or rods which can be pre-formed or cut to length to accommodate the standard valve body at different distances from the top cover.

Abstract: A vehicle on board system for recovering fuel vapors from the fuel tank both during filling of the fuel tank with volatile hydrocarbon liquid fuel and operation of the vehicle engine. A control unit in the fuel tank has a valve assembly actuated by a float to control the flow of fuel vapors from the top of the tank into a receiving canister with activated charcoal for absorbing the fuel vapors which can be purged from the canister by operation of the engine. The valve assembly has a valve seat, a flexible elastomeric closure received on a pivotally mounted carrier plate movable to open and closed positions relative to the seat, and a stripper plate encompassing the seat, overlying the closure and pivotally movable by the float to disengage the closure from the seat to open the valve.

Abstract: An air release valve includes a housing having a fluid inlet and a fluid outlet, a valve plate within the housing between the inlet and outlet, the valve plate having a pair of discrete apertures isolated from each other; a valve seal assembly including a seal engageable with the valve plate overlying the apertures; a float located in the housing upstream of the valve plate and connected to the seal, the float displaceable between first and second positions in the housing wherein displacement of the float in one direction progressively detaches successive portions of the seal from the apertures, the float having a tapered end remote from the seal.

Abstract: A liquid flow-out prevention valve is basically formed of a cut-off valve and a relief valve attached to the cut-off valve. The cut-off valve includes a housing having an outlet in an upper wall, and a valve body disposed inside the housing to open and close the outlet. A flow path communicating with the outlet extends from above the upper wall to a side wall of the cut-off valve. The relief valve includes a valve portion formed in the flow path at a side of the side wall, and an inlet communicating with the flow path and opened and closed by the valve portion. The inlet is disposed above a liquid level of the cut-off valve in a fuel tank and is arranged to open upwardly. The liquid flow-out prevention valve can be made compact and operate reliably.

Abstract: An improved apparatus and method for calibrating a float-type vent valve for use in an automobile fuel tank. The valve is provided with a calibration plate in the lower end thereof below the float, the calibration plate defining an axially-adjustable support for the spring which balances the float. The calibration plate includes a force probe aperture through which a force measuring device of known type can be inserted to measure the downward force of the spring-balanced float at a specified distance from closure, preferably a near-closed position. The calibration plate then is adjusted up or down as needed until a position is determined where the spring-balanced float is properly calibrated, and then the calibration plate is permanently secured in place on the valve body so that the valve remains calibrated.

Abstract: An onboard refueling vapor recovery (ORVR) system for a vehicle fuel system having a fuel tank, a mechanically sealed filler neck which receives a filler nozzle, and a vapor recovery apparatus such as a carbon canister. The system includes a nozzle shutoff line connecting the fuel tank with the filler neck to trigger the automatic shutoff mechanism of the filler nozzle when the level of fuel in the tank reaches a predetermined level. The system also includes a liquid-responsive control valve permitting venting of fuel vapor from the tank during both refueling and normal vehicle operating states when the fuel level in the tank is at or below the full level established by the nozzle shutoff line.

Abstract: An apparatus is provided for preventing the spillage of fuel into the water or onto a marine vessel when filling a fuel tank on the vessel. A vent line is coupled between the fuel tank and a vent port of the vessel, at least one valve assembly coupled within the vent line, and an overflow container is coupled within the vent line between the valve assembly and the vent port. The valve assembly defines a drain hole for permitting small quantities of fuel, gases and/or vapors to pass through the valve assembly and into the overflow container. A fill container defines an inlet port for receiving a fuel nozzle to fill the fuel tank with fuel and an outlet port coupled in fluid communication with a fill line for receiving a fuel nozzle to fill the fuel tank with fuel, and an outlet port coupled in fluid communication with a fill line for the passage of fuel between the fill container and the fuel tank.

Abstract: A fuel vapor vent valve assembly for a vehicle fuel tank for venting fuel vapor from the fuel tank to a fuel vapor emission device disposed external of the fuel tank, wherein the assembly comprises a valve housing having a fuel vapor vent outlet opening or orifice defined by a valve seat and communicating with a fuel tank vapor space interior of the fuel tank and with a fuel vapor emission device, such as a charcoal canister, exterior of the fuel tank. A fuel level responsive valve-moving device, such as a float, is disposed in the housing for movement therein. A vapor vent valve is disposed on the device in a manner for closing and opening the vent orifice in response to the fuel level in the fuel tank. The vent valve includes a partial spherical, radius-defined sealing surface that mates with a sealing surface of the valve seat to provide liquid/vapor tight sealing relation therebetween when the valve is in the closed position relative to the valve seat.

Abstract: An apparatus includes a valve container and a valve member. The valve container is formed to include an inlet in fluid communication with a fuel tank, an outlet, a side wall extending between the inlet and outlet, and a chamber in fluid communication with the inlet and the outlet. The valve member is disposed in the chamber and includes a central post and wing segments positioned to lie in a spaced apart relationship about the post. The wing segments are formed to define flow passages therethrough that are sized to permit the flow of fuel vapor therethrough and to momentarily block the flow of liquid fuel therethrough.

Abstract: In a fuel tank for motor vehicles including a tank vent with a venting valve, which automatically closes when the fuel in the tank reaches a predetermined level and when the vehicle is in an upside down position, the venting valve includes a vent closing member and a float structure engaging to the vent closing member and having a buoyancy, which is variable depending on the amount of fuel contained in the tank.

Abstract: A liquid cutoff valve unit provided for a sealed container in which a liquid fills comprises a discharge passage formed to an upper portion of the sealed container in a used state and adapted to discharge the gas therein, a float valve moving in accordance with a buoyancy so as to open or close the discharge passage, a float chamber in which the float valve is accommodated and having a size enabling the float valve to be moved therein and an urging means such as spring for urging the float valve in a valve closing direction. The float valve is provided with a cylindrical member having an upper end closed and a lower end opened to provide an inner cylindrical space formed as an air reservoir and at least one communication port opened to a side wall section of the cylindrical member and adapted to establish communication between an inside and an outside of the air reservoir.

Abstract: A venting valve assembly for a waterbed having a water compartment is provided. The assembly includes an exhaust port for the water compartment which includes a stem portion, an upper cover threadedly coupled to that stem portion, and a lower cover also coupled to the stem portion. Defined within the stem portion is a valve chamber with which a vent hole through an upper wall of the stem portion and a plurality of through holes in the lower cover are in open communication. The assembly also includes a pontoon disposed within the valve chamber for buoyant displacement responsive to entry of water into that valve chamber. The pontoon is formed with a substantially hollow body to which a resilient plug cover is coupled, and on which a plurality of outwardly protruding strips are formed. As water from the waterbed's water compartment enters the valve chamber, the pontoon is displaced buoyantly upward until the resilient plug cover engages the vent hole.

Abstract: A fuel leakage prevention apparatus comprising a body having a neck formed at the top and having a sealing surface at the bottom of the neck, a rib installed on the neck and having inclined upper surfaces at the top of the rib, a stopper plate extended inwardly from a lateral wall and having a center opening, and a plurality of vent holes formed at the bottom surface and the lateral surface of the body; a float located below the stopper plate of the body; a base mounted on the stopper plate and having a protruding rod extended through the center opening toward the float; spring means mounted on the base; sealing means mounted on the spring means and having a conical wing for sealing the sealing surface of the neck and a pushing rod formed at the top of the conical wing; and a ball located on the inclined upper surfaces of the rib of the body.

Abstract: A valve for detecting a liquid surface used in a fuel tank is formed of a valve body having an orifice at an upper part thereof, a plurality of bottom through-holes formed at a bottom part thereof, and a plurality of surrounding wall through-holes formed at a surrounding part thereof; a valve member movably disposed inside the valve body to close the orifice; and an urging member for moving the valve member in cooperation with buoyancy of the valve member so as to close the orifice. In the valve of the invention, the diameter of the orifice is set to be larger than the diameter of the bottom through-holes, and also larger than a diameter of the surrounding wall through-holes. Therefore, the orifice can be prevented from being clogged by foreign substances.

Abstract: An auxiliary system for insuring adequate water supply during peak periods from a well with a low recovery rate. A gravity storage tank is replenished at a rate equal to or slightly lower than the recovery rate of the well. A float-controlled air shutoff valve prevents overfilling and allows water to drain from the storage tank to supply a pressure-responsive pump. The pump, together with a diaphragm pressure tank, supplies normal household use at varying flow rates, drawing its peak requirements from the gravity storage tank.

Abstract: A water supply system which includes an adjustable bury pressure tank having an adjustable float pump control assembly. The water supply system may be adapted for use in a wide variety of climatic conditions.

Abstract: In a fuel storage tank having a fill pipe arranged to discharge within the tank below the normal liquid level in the tank, an air transfer valve is mounted within the fill pipe above the normal maximum liquid level, the valve being normally closed and having an outlet communicating with the head space in the tank and an inlet directed away from the direction of fluid flow in the fill pipe. An operating mechanism within the valve opens the valve in response to increased pressure in the fill pipe arising from air or vapour carried by fuel flowing in the pipe. The air transfer valve is preferably attached to the inside of the fuel pipe just above the normal maximum liquid level. The operating device within the air transfer valve may be a valve which is normally held in its closed position by gravity or a light spring closure force.

Abstract: A float valve device for a fuel tank of an automotive vehicle. The float valve device comprises a valve body installed to an upper wall of the fuel tank. The valve body is formed thereinside with a communication passage for establishing communication between inside and outside of the fuel tank. A valve mouth member is fixedly disposed inside the communication passage and includes a lower end section having a peripheral portion defining thereinside a valve opening which forms part of the communication passage. A float is disposed inside the valve body and movable relative to the valve opening in accordance with a level of the liquid in the fuel tank. A rubber member is securely disposed at an upper section of the float. The rubber member has a sealing face which is substantially flat and contactable with the peripheral portion of the valve mouth member to close the valve opening upon ascending of the float.

Abstract: A propane gas delivery system having a large storage tank, a supply conduit to deliver propane gas, a first regulator and a second regulator to reduce pressure, where a secondary containment tank is provided to receive and retain any liquid propane which enters the supply conduit, whether due to overfilling of the main tank or condensation within the supply conduit, and which allows the liquid propane to reconvert into the gas phase. A float valve is provided in the outflow conduit of the secondary tank to prevent flow of liquid propane from the secondary tank in the event the amount of liquid trapped by the secondary tank exceeds its retention capacity.

Abstract: An onboard vapor recovery system for a vehicle fuel system having a fuel tank, a filler neck dynamically sealed by high pressure fuel flow from a filler nozzle, and a vapor recovery apparatus such as a carbon canister. The system includes a liquid level operated control valve which shuts off refueling with a two-stage closing operation providing an initial soft shutoff and a final shutoff. The system also preferably includes a valve in the fuel tank to maintain a predetermined pressure head sufficient to hold the system closed against further refueling at least temporarily, and a positive action, one-way check valve in the lower end of the filler pipe to prevent spitback of fuel from the pressurized tank once refueling has ceased.

Abstract: A fuel tank vapor control apparatus controls the flow of liquid and vapor fuel through an aperture in a fuel tank (16). The fuel tank vapor control apparatus includes a vent housing (12) mounted in the aperture (34) and formed to include a vent inlet (13) and a vent outlet (36), the vent housing (12) defining a vent path for communicating vapor fuel from the fuel tank between the vent inlet and the vent outlet. The apparatus also includes a valve (48) movable in the vent housing between a blocking position for blocking flow of liquid and vapor fuel from the fuel tank between the vent inlet and the vent outlet along the vent path and a venting position allowing flow of vapor fuel between the fuel tank and the vent outlet along the vent path. A labyrinthine member (140) is also included, being disposed between the fuel tank and the vent path for discriminating fuel vapor from liquid fuel so as to block liquid fuel from the vent path.

Abstract: In a fuel interruption device for a fuel tank, a main valve is prevented from opening as a result of the action of an auxiliary valve during closure of the main valve; and more specifically, an auxiliary valve which is caused to move up and down by a float and a main valve which moves up and down in linkage with the up and down movement of the auxiliary valve are accommodated inside a casing which allows the inflow and outflow of liquid fuel and is provided at the end of a passage which connects the fuel tank and canister; a linking projection is provided on one of the valves, that is, either the auxiliary valve or the main valve, so that the main valve moves in linkage with the auxiliary valve in an action that is either advanced or retarded within a predetermined range, and a projection regulating groove into which the linking projection is inserted so that the projection can change its position within the range is formed in the other valve; and auxiliary valve seat and main valve seat open independently in

Abstract: A dual float snorkel vent for use in sealing a well conduit vent cap from flood waters that could contaminate well water therebelow. A lower float causes an upper float to seal a check valve as water rises and prior to water reaching the level of the upper float and the snorkel vent is positioned at an appreciable vertical distance below an inlet to the vent cap to ensure that no water enters the vent conduit.

Abstract: A ventilation device has a housing which can be connected with a fluid system to be ventilated. A float is movable in the housing, and controls a valve through an operating device for a ventilation process. The valve opens and closes a ventilation passage. The operating device has an operating magnet with exciter coil, which can be controlled electrically through a switch operable by the float. The operating magnet, with its switching part, operates to open the valve. The ventilating device can function without disturbance in operation, can be manufactured at low cost, can be used even with very high pressures, and, if necessary, can be monitored from a remote point.

Abstract: A device for preventing a fluid from flowing in a canister used in an automobile comprising a casing of a hollow cylindrical shape having an inlet and an outlet, the outlet being connected to a vent pipe of the canister and the inlet being connected to the atmosphere, a funnel-shaped plate having a venting port in its center and airtight-coupled to a inner surface of the casing, a bladder positioned below the funnel-shaped plate, having a gating portion fittable to the venting port of the funnel, and biasing means for urging the gating portion of the bladder against the venting port of the funnel-shaped plate.

Abstract: An on-off valve 30 is mounted in an intermediate portion of a first evaporative fuel conduit 24 for passing an evaporative fuel within a fuel tank 21 to a canister C. The on-off valve 30 is opened when refueling. A float valve 28 is mounted at a lower end of the first evaporative fuel conduit 24 and closed by rising of the liquid level in the fuel tank 21. A two-way valve 40 and a second float valve 29 are mounted in an intermediate portion and a lower end of a second evaporative fuel conduit 25 which permits the fuel tank 21 and the canister C to be put into communication with each other during non-refueling.

Abstract: An onboard vapor recovery system for a vehicle fuel system having a fuel tank (10), a filler neck (12) dynamically sealed by high pressure fuel flow from a filler nozzle, and a vapor recovery apparatus such as a carbon canister (18). The system preferably uses an inventive liquid level operated control valve (20) which shuts off refueling with a two-stage closing operation providing an initial soft shutoff and a final shutoff. The system also preferably includes a valve (22) in the fuel tank to maintain a predetermined pressure head sufficient to hold the system closed against further refueling at least temporarily, and a positive action, one-way check valve (24) in the lower end of the filler pipe (12) to prevent spitback of fuel from the pressurized tank (10) once refueling has ceased.