Abstract: An improved thermal relief vent for a fuel tank, and a method of manufacturing the same, includes a thermal relief ring that is used to create a mechanical seal within the vent. The thermal relief ring, at room temperature, is crimped in place by use of the vent cap itself. The crimped thermal relief ring creates a mechanical seal between the vent and the vent cap, up until a predetermined thermal relief point, at which time the thermal relief ring will soften and/or yield and release the vent cap from the vent body.

Abstract: A vent apparatus is opened to allow free flow of fuel vapor from a vehicle fuel tank through the vent apparatus to a fuel vapor recovery canister during tank refueling until a predetermined level of liquid fuel is reached in the vent apparatus. Once refueling has been completed, the vent apparatus is closed to block or limit further flow of liquid fuel to the vent apparatus. At the same time, fuel vapor discharge passageways in the vent apparatus that had been closed once the fuel tank had been filled to a predetermined capacity with liquid fuel are reopened so that fuel vapor can flow freely from the fuel tank to the canister even though the volume or height of liquid fuel in the fuel tank has not decreased since the tank was filled during refueling.

Abstract: A vent valve assembly utilizes a lever arrangement that opens a vapor discharge opening such as during normal operation of a motor vehicle to permit fuel vapor venting and that seals the vapor discharge opening such as when the motor vehicle is inclined to prevent liquid fuel from discharging through the vapor discharge opening.

Abstract: A pipeline vent valve comprising a body (11) defining a chamber of clerestory configuration in which the upper portion (B) of the chamber is of reduced cross-sectional area, the chamber having an inlet (13) towards its lower end which is adapted to be connected to a pipeline and an outlet (15) in the upper portion, a valve body (23) supported in the upper portion of the chamber to be movable between a first position at which it is in sealing engagement with the outlet and a second position at which it is out of sealing engagement with the valve seat, said valve body being responsive to the level of liquid in the chamber in the chamber and being adapted to close on the liquid level in the chamber exceeding a predetermined level, said valve body having central passage (37) providing communication to each side of the valve body, a float member (21) supported within the chamber and adapted to cause said movement of said valve body between the first and second position as a result of the presence of liquid in the

Abstract: The fuel cutoff valve comprises a valve support on the upper part of the float, and the seat member is mounted on the valve support. The valve support has the bending space that has an inner diameter larger than the outer diameter of the seal part. The seat member is formed from a rubber material, has a side wall formed in a cylindrical shape from the outer periphery of the seat part and a stopper on the side wall, forming the mounting space by being formed in an almost a rectangle shape cross section, and being supported on the valve support by fitting the valve support on the mounting space. The seat part is elastically deformed in the bending space direction when set on the seal part and closes the connection path.

Abstract: A bleed valve which is intended for the fuel tank of a vehicle consists of a housing (1) which on the topside comprises an outlet orifice (6) and an orifice (4) which is intended for connection to the head space of a tank, a floating body (3) which is supported by means of a spring on the base (1?) of the housing (1) and is disposed in such a manner as to be able to move in the longitudinal direction thereof. The rim (19) of the outlet orifice (6) forms a valve seat for a sealing element which is supported by a support disc (12), wherein the support disc (12) is articulated in a cardanic manner on the floating body (3). The sealing element is disposed in such a manner as to be able to move according to the movement of the floating body (3) between a position which closes the outlet orifice (6) and a position which opens same, wherein as a result of the said articulation of the support disc (12) on the floating body (3) positional changes, e.g.

Abstract: A fuel storage system for a transportation or recreational vehicle has a fuel tank that carries a vapor assembly that seeks out vapor pockets and controllably removes fuel vapor from the tank without releasing hydrocarbons to the surrounding environment. Preferably, a vent manifold attaches to a flange that sealably covers an access hole of the tank. At least one flexible tentacle extends from the manifold in the tank to a respective vapor vent valve that floats upon the surface of fuel at a vapor dome. When freely floating, the vent valve is open thus communicates the vapor dome through the tentacle and preferably with a filtering carbon canister. As fuel surface levels change or the vehicle tilts, changing the vapor dome size or location in the tank, the floating vapor vent valve is free to move generally with the vapor dome and as permitted by the flexibility of the trailing tentacle.

Abstract: An automatic degassing valve has a chamber with a float positioned therein to provide for automatically venting gas from a fluid system. The degassing valve includes an actuator lever having on one end a closure for sealing a vent and being attached at the other end to the float. Upward and downward movement of the float causes the actuator lever to close and open the vent. The degassing valve is made of corrosion resistant material and is readily disassembled and assembled for modification and repair.

Abstract: A first valve port is set to have a seal diameter smaller than that of a second valve port. Due to a pressure reception area of a first valve body port being small, the attachment force of the first valve body portion is reduced with respect to a valve seat. It thus becomes possible to open the first valve port as the attachment of the first valve body portion is released with respect to the valve seat without increasing the weight of the float. After the first valve port is opened, the pressure difference is reduced between inside of a fuel tank and a connecting pipe on the side of a canister, and the attachment force acting on a second valve body portion is also reduced. In this manner, the second valve body portion is opened with certainty. As a result, it becomes possible to go through the operation of opening the second valve port that is larger in diameter than the first valve port without increasing the weight of a sub float.

Abstract: The object of the present invention relates to a venting device, which can be connected to a tank containing air and water. The device comprises a first venting path for the air and first intercepting means, set along this, which are suitable for closing the first path. The device also comprises a second venting path for the water and second intercepting means, set along this, which are suitable for opening the second passage to deliver the water. The first intercepting means can be influenced by the water to go from the open configuration to the closed configuration, so that when the air has been vented out, the water reaches a set greater pressure limit, opens the second intercepting means and can be delivered outside.

Abstract: A fuel cutoff valve 10 has a float assembly 52 and an upper valve plug 60 located in a valve chest 30S defined by a casing 20. The float assembly 52 has a valve support member 55 formed in its upper portion to support the upper valve plug 60. The upper valve plug 60 has a support convex 66b held on a support plane 56a of the valve support member 55, where a center of gravity of the upper valve plug 60 is located below a supporting point 55a around which the support convex 66b is balanced on the valve support member 55. The upper valve plug 60 includes a first valve section 61 and a second valve section 65. The first valve section 61 has a first valve body 62 and a sheet member 64. The first valve body 62 is made of POM (polyoxymethylene), while the second valve section 65 is made of PA6 (polyamide) containing 30% of glass fibers. The second valve section 65 is accordingly structured to have a lower density than the first valve body 62.

Abstract: The invention refers to a ventilation device for a fuel tank of a vehicle that comprises a valve housing (15) with a ventilation opening (8), a float (23) moveable between a resting position and a closing position arranged in the valve housing (15) and a sealing element (30) placed on the upper side of the float (23) that acts together with the ventilation opening (8), in which case the float (23)—when it is in its resting position—is arranged in a lower position in the valve housing (15) and releases the sealing element (20) and the ventilation opening (8), in which case the float (23)—when it is in its closing position—presses against the closing element (20) against the ventilation opening (8) owing to lifting forces and is characterized by the following additional embodiment: there is at least one inflow opening (24) to allow gas and fuel to flow through, located in the circumferential wall of the valve housing (15), in one single upper area close to the ventilation opening (8), there is a separate sto

Abstract: The present invention relates to a simple fuel vent assembly for use in inboard and outboard fuel tanks for marine vessels. The vent assembly includes upper and lower portions defining an L shaped interior passageway. The lower portion includes upper and lower valve seats positioned within this passageway. Spaced vent openings extend through the lower portion above and below the valve seat. A spherical float is positioned within the passageway between the upper and lower valve seats. As fuel is added to the tank, pressure can escape through the fuel vent. The flow valve is within the passageway as the level of liquid fuel in the tank rises during the fuel refilling process. When the tank is at its desired fill level the float engages the upper valve seat and forms a seal preventing liquid fuel from traveling past the upper seat and through the passageway into the atmosphere outside the tank. The second vent opening remained open to vent pressure from the space between the top of the tank and the fuel level.

Abstract: A fuel cutoff valve of the invention attached to an upper portion of a fuel tank includes a casing, a first part supported by multiple legs, a second part, and a spring. The second part is located below the first part in a vertically movable manner and has multiple air holes formed in a top plate to communicate with a buoyancy chamber. When the fuel level in the fuel tank rises to submerge the second part and reach the first part, the first part rises by its buoyancy to close a connection conduit. In the event of an abrupt rise of the fuel level at a high increase rate, for example, by a sudden turn of the vehicle, the second part rises by the increased buoyancy of the buoyancy chamber by the air retained in the buoyancy chamber and presses the first part up to close the connection conduit. The fuel cutoff valve of the invention promptly closes in response to a heavy ruffle of the fuel level by a sudden turn of the vehicle, so as to prevent the outflow of the fuel from the fuel tank.

Abstract: A fuel tank made of a plastic material and fitted with at least one fuel accessory attached to an inside surface of a wall thereof, wherein the fuel accessory is attached to a predetermined site at the inside surface by fusion welding. Further there is disclosed a fuel accessory for attaching to a site at an inside wall portion of a plastic material fuel tank, comprising a housing formed with an engaging surface attachable to the site. The engaging surface is fitted with a fusion melting element for fusion welding the fuel accessory to the fuel tank.

Abstract: A fuel-outflow check valve includes: a casing, at least one portion of which is located in a fuel tank, the casing having a ventilation hole via which the interior of the casing and the interior of the fuel tank communicate with each other and an upper wall portion protruding inward from the inner peripheral face of the casing; a float that is disposed in the interior of the casing and is vertically movable; and a valve element that is provided on the float and can contact a valve seat formed at the casing.

Abstract: A cut valve preventing fuel overflow from a fuel tank to a fuel gas passage includes a float moving upward and downward corresponding to a surface of the fuel, a cone formed to an upper surface of the floater to move with the float, at least one link formed to an upper surface of the float to move with the float, and a cap disposed to intercept a fuel gas passage by a movement of the cone when the surface of the fuel moves upward and comprising at least one rod inserted to the at least one link.

Abstract: A kit for constructing a de-aerator for a fluid distribution system includes a gas concentrator adapted to be received in chamber of a T-coupling provided with the kit. A cap is provided that closes a cap connector integrally formed with the T-coupling. The cap supports a valve that opens and closes in response to fluctuations of a level of the fluid in the cavity as air is accumulated in the cavity and discharged by an opening of the valve.

Abstract: A vacuum assisted priming system for a fluid pump including a housing defining a hopper that communicates with a pump inlet. The housing mounts a first port that communicates with the source of vacuum and a second port that communicates with atmosphere. A check valve allows atmospheric air to flow into the housing under certain operating conditions but inhibits reverse flow. A valve member pivotally mounted within a valve chamber carries first and second sealing elements that are engageable with first and second seats. The lever arm is operatively connected to a float via a lost motion connection. When the fluid level in the hopper rises to a predetermined level, an actuating rod moves the lever arm to a first sealing position. When the fluid level falls to a predetermined level, the actuating rod moves the lever arm to a second sealing position.

Abstract: In a fuel vapor pipe structure including a plurality of cut valves for passing or cutting a fuel vapor at inside of a fuel tank, a pipe joint connected to the cut valves for communicating the fuel vapor to a canister, and a resin tube for connecting the cut valve and the pipe joint, the resin tube is bent to pipe by making a length of the resin tube longer than a length of connecting connection tube portions of the cut valve and connection tube portions of the pipe joint and arranging the connection tube portion of the cut valve to shift from a straight line of connecting a center of the cut valve and a center of the pipe joint by a predetermined angle in a horizontal direction.

Abstract: The invention relates to a valve assembly for use in connection with carpet cleaning extraction machines and similar extraction cleaning devices. The invention allows the intake of liquid and the mixing of different liquids in a mixing chamber, such as clean water with detergent, and the discharge of a selected liquid without the formation of an air or vapor lock that would inhibit the discharge of the selected liquid. In particular, the invention prevents the formation of a vapor lock when water is being drawn into a chamber that would prevent the subsequent discharge or spraying of the liquid.

Abstract: A fuel cutoff valve comprises a casing having a seal portion disposed facing a connecting passage and projecting in annular configuration towards a valve chamber; and a float mechanism having a float which rises and falls due to increasing and decreasing buoyancy according to the fuel level within the valve chamber. The float comprises a flexural depression-enabling recess situated on its upper surface at a location in opposition to the seal portion, for enabling the seat portion to undergo flexural depression when pressed by the seal portion. The casing has a regulating portion on the outside perimeter of the seal portion, for regulating the level of elastic deformation at which the seat portion elastically deforms into the flexural depression-enabling recess.

Abstract: The invention concerns a dual float rollover valve for use in a vehicle fuel tank assembly. The rollover valve may include a housing having an upper portion with a top end defining a vapor passage and an opposed bottom end, and an outer wall extending between the top and bottom ends and defining a channel extending therethrough; and a lower portion having a first end engaging with the bottom end of the upper portion, an opposed second end including a vent hole therethrough, and an outer wall extending between the first end and the second end and defining a chamber therein. An inner seal may be mounted between the channel and the chamber and include a seal bore extending from the channel to the chamber, with an upper float mounted in the channel, and a lower float, mounted in the chamber, having a buoyancy relative to fuel such that it is adapted to float on the fuel and selectively seal against the seal bore.

Abstract: System for closing off an opening in a plastic tank, formed from a sheet of multilayer plastic that includes a barrier layer, the said sheet being welded around the perimeter of the opening and provided with a peripheral region that is slimmed down so as to effectively restrict the permeation of gases and liquids into the layer located between the tank and the barrier layer. Method of closing of a tank by welding such a plate, comprising the welding of the slimmed-down peripheral part by the technique of laser or infrared radiation welding. Use of the method to close off a fuel tank for a motor vehicle.

Abstract: A low permeation weldable fuel tank assembly is provided to reduce fuel vapor permeation from a fuel tank. The weldable fuel tank assembly has a mounting portion mountable to the fuel tank and a valve housing that is attachable to the mounting portion. In one aspect, the mounting portion includes a fuel vapor permeation barrier. In another aspect, an anti-permeation cap with a fuel vapor permeation barrier is affixed to a portion of a tank assembly.

Abstract: A vent structure at least partially defining a passageway between the inside of a fuel storage tank and the outside atmosphere includes a separator membrane. The separator membrane is positioned within the vent structure configured to block liquid fuel in the storage tank from reaching the outside atmosphere through the passageway. The separator membrane is permeable by air. The vent structure may be in the form of a cap or a remote vent, or it may be provided substantially within the fuel storage tank. The vent structure may be provided as part of a fuel evaporative emissions system for a vehicle or motor-driven power equipment.

Abstract: The present invention relates to a simple fuel vent assembly for use in inboard and outboard fuel tanks for marine vessels. The vent assembly includes upper and lower portions defining an L shaped interior passageway. The lower portion includes upper and lower valve seats positioned within this passageway. Spaced vent openings extend through the lower portion above and below the valve seat. A spherical float is positioned within the passageway between the upper and lower valve seats. As fuel is added to the tank, pressure can escape through the fuel vent. The flow valve is within the passageway as the level of liquid fuel in the tank rises during the fuel refilling process. When the tank is at its desired fill level the float engages the upper valve seat and forms a seal preventing liquid fuel from traveling past the upper seat and through the passageway into the atmosphere outside the tank. The second vent opening remained open to vent pressure from the space between the top of the tank and the fuel level.

Abstract: A cut valve with a check valve includes a body case, a cap member, positive and negative pressure valves, and first and second springs. The body case defines a vent hole. The cap member is fitted to an upper portion of the body case. The positive pressure valve is made of resin, defines an opening part, and is disposed to be contactable with and separable from the vent hole from above. The first spring is disposed on the positive pressure valve and presses the positive pressure valve in a direction in which the positive pressure valve closes the vent hole. The negative pressure valve is made of resin and is disposed to be contactable with and separable from the opening part from below. The second spring presses the negative pressure valve in a direction in which the negative pressure valve closes the opening part.

Abstract: A valve comprising a housing accommodating a first and a second outlet port, a first stage float member associated with the first outlet port and a second stage float member associated with the second outlet port. The float members are displaceable within the housing about parallel axes, between an open position and a closed position. The first stage float member at least partially overlaps over the second stage float member.

Abstract: A fuel valve comprises a first valve chamber and a second valve chamber within a casing, where a first valve mechanism and a second valve mechanism are housed in the respective valve chambers. A first float of the first valve mechanism rises when the fuel level reaches a first liquid level, to close a first connection conduit. The second valve mechanism rises to close a second connection conduit when a second liquid level, which is higher than the first liquid level is reached. A valve conduit, which acts as a restriction path, is provided between the first valve chamber and the second valve chamber. The valve conduit is formed with a conduit area that is less than that of the first connection conduit, so as to increase the pressure within the fuel tank when the first connection conduit is closed.

Abstract: A fuel cutoff valve of the invention includes a casing body having a valve chamber and a holder element, a float having a seat member on its top, a movable valve element that is fitted in the holder element in a vertically movable manner, and a first connection conduit and a second connection conduit that connect inside of the valve chamber with outside. When the fuel level in a fuel tank rises to a preset first fluid level, the float moves up to shut off the first connection conduit. When the fuel level further rises to a preset second fluid level, the float further moves up to press the movable valve element up and shut off the second connection conduit. The fuel cutoff valve of this simple structure effectively prevents a blowing back flow of fuel in the course of fuel supply without requiring any subtle setting of a spring load.

Abstract: A float assembly for a multifunction fuel vapor vent valve with a float having a recess formed in the upper surface of the float with a slot formed in the side of the float and communicating with the recess. A raised surface portion is formed in the bottom of the recess and downwardly extending projections are formed in the slot at the recess. A flexible wafer like valve disk is inserted in the slot and deformed or curled to pass under the projections and over the raised surface and into the recess. When fully received in the recess the disk returns to its flat configuration; and, the downward projections prevent removal without distortion. Radially inwardly projections about the recess retain the disk for limited lost motion in the direction of float movement.

Abstract: A low permeation weldable fuel tank assembly is provided to reduce fuel vapor permeation from a fuel tank. The weldable fuel tank assembly has a mounting portion mountable to the fuel tank and a valve housing that is attachable to the mounting portion. The mounting portion includes a fuel vapor permeation barrier.

Abstract: A fuel cut-off valve 100 of the invention is attached to an upper portion of a fuel tank and connects and disconnects inside with and from outside of the fuel tank according to the fuel level in the fuel tank. In the fuel cut-off valve 100 of the invention, a valve casing 110 forms a first valve chest 120 and a second valve chest 130 connected to the fuel tank and has an inter-valve chest flow passage 112 connecting the first valve chest 120 to the second valve chest 130 and a canister connection port 102 connecting the second valve chest 120 to a canister placed outside the fuel tank. A first float 124 and a second float 134 are respectively located in the first valve chest 120 and in the second valve chest 130. When the fuel level in the fuel tank rises to reach a preset first level FL1, the first float 124 moves up to close an opening 122 and thereby close the inter-valve chest flow passage 112.

Abstract: A fill limit vent valve assembly includes a cover assembly, a valve assembly and a fill control system.

Abstract: A float operated fuel vapor vent valve has body structure with an annular mounting flange formed of material weldable to a fuel tank and the flange is spin welded to the tank. The float has surfaces thereon which slidably engage corresponding surfaces in the float chamber to prevent relative rotation of the float with respect to the valve body during spin welding. An optional pressure relief valve in the vent outlet also has surfaces slidably engaging the vent passage to prevent relative rotation during spin welding.

Abstract: An oil deaeration device includes a base and an oil housing, the base being equipped with a first and a second inlet, an outlet, a float provided in the oil housing and a diaphragm provided in the oil housing. The oil housing is divided into two chambers, the float is provided in a first chamber, and a further float is provided in a second chamber. It is significant for the oil deaeration device that the diaphragm on one side is connected to the first chamber, that the diaphragm on its other side is connected to the second chamber, that a safety valve is provided in connection with the outlet, and that the safety valve communicates with the outlet in its open position.

Abstract: A fuel valve includes an upper chamber communicating with a ventilation passage of a canister; a lower chamber to be disposed inside a fuel tank; a communicating port between the upper chamber and the lower chamber; and a float member disposed in the lower chamber for blocking the communicating port when fuel flows into the lower chamber. A bottom orifice or a one-way valve is formed in the bottom of the lower chamber for preventing the fuel to flow into the lower chamber and allowing the fuel to flow out from the bottom of the lower chamber. A fuel inlet is formed at a lower side of the side wall to face upwardly to allow the fuel to gradually enter the lower chamber so that an inner pressure in the fuel tank increases by entering the fuel into the lower chamber after the fuel reaches the fuel inlet.

Abstract: An apparatus is provided for controlling discharge of fuel vapor from an interior region in a fuel tank and preventing unsatisfactory liquid fuel levels within the interior region of the fuel tank. The apparatus includes a buoyant fill-limit valve movable to open and close a vapor outlet opening.

Abstract: A fuel tank connector for connecting a fuel tank and a pipe in communicating fashion includes a gas barrier member made of a synthetic resin and having a gas barrier property. The gas barrier member includes a tubular portion and a flanged portion provided on a peripheral side of the tubular portion, which extends beyond an opening of the fuel tank. The gas barrier member is made of a liquid crystal polymer, aromatic polyamide, a blended polymer of an ethylene-vinyl alcohol copolymer and high-density polyethylene, a blended polymer of polyamide and polyethylene, or a blended polymer of polyamide and high-density polyethylene.

Abstract: In a dipping type pump where a rotary shaft extending from a motor into a pump casing disposed in liquid is mounted with impellers, and liquid is sucked from a sucking port at a lower portion of the casing and discharged from a discharge port by rotational driving of the motor, where a check valve for air purge which allows outflow of gas from the interior of the casing but prevents outflow of liquid therefrom is provided at an upper portion of the casing.

Abstract: A part for connecting a fluid line to an opening of a container comprised of thermoplastic material or for closing the opening of the container has a first component and a second component of thermoplastic material. The first component has a surface to be connected to the container by forming a welded heat fusion joint. The first component has an insufficient diffusion barrier capability relative to hydrocarbon fuel. Compared to the material of the first component, the material of the second component has higher diffusion barrier capability, reduced swelling capability relative hydrocarbon fuel, higher mechanical strength, and higher thermal shape stability. The first component encloses the second component at least up to an injection location remote from the connecting surface. The material of the second component is injected into the still formable core of the material of the first component via the injection location.

Abstract: A fuel tank vent system includes a fuel vapor vent apparatus and a vent controller. The fuel vapor vent apparatus is adapted to be coupled to a fuel tank. The vent controller is coupled to the fuel vapor vent apparatus and configured to control flow of fuel vapor from the fuel tank through the fuel vapor vent apparatus to a destination outside the fuel tank.

Abstract: In a venting device for a fuel tank (1), a venting line (5) has a movable section (6) and a spring element (14). The free end of the venting line (5) is prestressed against an upper wall of the fuel tank (1). This ensures that a valve (7) which is arranged at the free end of the venting line (5) is always arranged in the vicinity of the upper wall of the fuel tank (1).

Abstract: A device and method for venting a tank comprising an intermediate shutoff valve as part of a cover that closes a tank opening. The intermediate shutoff valve is placed between an existing valve and a vent port in a liquid storage tank. The shutoff valve is operable to substantially fluidly seal the vent port when the vent valve is displaced greater than a predetermined amount. The intermediate shutoff valve facilitates complete removal of the existing vent valve during an impact wherein a wall of the storage tank impacts the existing valve. Upon impact, the intermediate shutoff valve is operable to close and seal a tank opening created by the displacement and removal of the existing vent valve.

Abstract: An allowable angle of a float valve member with respect to a valve case is so set that a deformed direction, as caused by a gate position at a injection molding time, of a inner circumference of a communication hole of the valve case with respect to a roundness and a deformed direction, as caused by a gate position at a injection molding time, of an outer circumference of a crest portion of the float valve member with respect to the roundness may be substantially aligned. Between the valve case and the float valve member, there is an interposed angle regulating unit for preventing the angle of the float valve member with respect to the valve case from varying over the allowable angle.

Abstract: An improved thermal relief vent for a fuel tank, and a method of manufacturing the same, includes a thermal relief ring that is used to create a mechanical seal within the vent. The thermal relief ring, at room temperature, is crimped in place by use of the vent cap itself. The crimped thermal relief ring creates a mechanical seal between the vent and the vent cap, up until a predetermined thermal relief point, at which time the thermal relief ring will soften and/or yield and release the vent cap from the vent body.

Abstract: A gas purge valve comprising a housing fitted with an inlet port being in flow communication with a liquid outlet port, and at least one gas outlet member, a gas flow barrier associated with the liquid outlet port, a float member displaceable within the housing between a first position adjacent the inlet port and a second position adjacent the gas outlet The at least one gas outlet is fitted with an inlet prohibiting valve, and is sealingly engageable by a flexible sealing member articulated to the float member. Buoyant displacement of the float member into the second position entails sealing of the at least one gas outlet by the flexible sealing member.

Abstract: An apparatus is for inhibiting fuels from flowing out of fuel tanks, and includes a cover, a breather pipe, an upper case, a lower case, and a floating valve. The upper case is welded to the breather pipe in an airtight manner so as to form a chamber for holding the lower case, in which the floating valve is accommodated, therein. Moreover, the breather pipe is welded to the cover in an airtight manner. The apparatus not only obviates O-rings but also is downsized, because the upper case and the breather pipe are sealed by welding.

Abstract: The invention concerns an air transfer valve which automatically vents accumulated air from pressurized liquid reticulation pipelines or vessels. The valve (10) has a housing (12) which is connectable to the pipeline or vessel. The housing has a first outlet (38) venting to atmosphere and a control chamber (60) which is exposed to internal pressure in the housing via a control chamber inlet. A first valve closure (34) can move to open and close the first outlet. This valve closure is exposed to control chamber pressure tending to move it to close the first outlet and to internal housing pressure tending to move it to open the first outlet. When the housing is pressurized the first valve closure (34) is maintained in a closed position by virtue of an unbalanced pressure force acting on it that is attributable to exposure of the valve closure to atmosphere through the first outlet. There is also a control chamber outlet (36) from the control chamber (60) to atmosphere.