Abstract: A fueling device includes a fuel passage-forming member and a flap valve mechanism. The flap valve mechanism includes an opening-forming member attached to one end of the fuel passage-forming member and an opening-closing mechanism to open and close a filler inlet of the opening-forming member. The fuel passage-forming member includes a pipe body containing a resin inner layer in a pipe shape made of a first resin material and a resin outer made of a second resin material, and a welding end formed on an opening end of the pipe body. The opening-forming member includes a cover member that covers the opening end of the pipe body and a welded end formed on an opening end of the cover member and welded to the welding end. The cover member is made of a third resin material welded to either one of the first resin material and the second resin material.

Abstract: A fuel cutoff valve comprises a casing main body with a connecting hole and a valve chamber, a cover forming the tube member, and the float housed in the valve chamber. The valve comprises, above the casing main body, the liquid closure member forming the retaining chamber for temporarily retaining liquid fuel flown out of the connecting hole and the partition member formed in plurality in a ridge form on the upper surface of the upper wall within the retaining chamber. Each partition member is arranged radially so as to be connected to the liquid closure member from the near center of the connecting hole, and configured in such a way that the retaining chamber is divided into multiple divided chambers.

Abstract: A filler neck is equipped with a neck main body having a pipe shaped resin inner layer and resin outer layer, and a retainer made of metal mounted so as to cover the edge part of the neck main body. The resin inner layer and the resin outer layer are made of resin materials for which one layer has superior fuel permeability resistance to the other layer. The resin inner layer has a screw part for screwing into a screw part of a fuel cap on the inner wall of the resin inner layer. The retainer has a seal part for sealing between the gasket, and a round cylinder shaped outer circumference protector part. The lower end of the outer circumference protector part is on plane perpendicular to the center axis of the fuel path. The plane includes the screw part.

Abstract: A fuel cutoff valve comprises a casing main body with a connecting hole and a valve chamber, a cover forming the tube member, and the float housed in the valve chamber. The valve comprises, above the casing main body, the liquid closure member forming the retaining chamber for temporarily retaining liquid fuel flown out of the connecting hole and the partition member formed in plurality in a ridge form on the upper surface of the upper wall within the retaining chamber. Each partition member is arranged radially so as to be connected to the liquid closure member from the near center of the connecting hole, and configured in such a way that the retaining chamber is divided into multiple divided chambers.

Abstract: In a fuel cutoff valve 10, a casing 30 including a valve chest 33 is fastened to a cover member 20 thermally welded to an upper tank wall FTa of a fuel tank FT. A float 50 is located in the valve chest 33 of the casing 30. The casing 30 has bottomed recesses 42 formed as concaves in an outer circumferential wall of the valve chest 33, and vent holes 40 provided at respective bottom areas of the bottomed recesses 42. Each of the vent holes 40 is a through hole of a small diameter, which is determined to be sufficient for ventilation of the fuel vapor in the valve chest 33. The vent hole 40 has a short dimension by the depth of the bottomed recess 42.

Abstract: A fuel cutoff valve includes a first float mechanism housed in a first valve chamber of a casing, and a second float mechanism housed in a second valve chamber. During fueling operations, when an intake opening becomes blocked by fuel, the second float mechanism closes second vent holes, and the first float mechanism closes a connecting passage. At times other than fueling operations, when the intake opening becomes blocked by fuel, because the fuel tank interior and the first and second valve chambers, communicate through the second vent holes in addition to the first vent holes, differential pressure between tank internal pressure and pressure of the valve chambers does not rise to the point of actuating the closing operation of the first float mechanism, and the fuel tank FT does not become sealed.

Abstract: The fuel tank venting device is furnished with a full fuel control valve and a rollover valve that are installed on a fuel tank, and a fuel tank valve unit having a pressure valve that is situated between a canister and the two valves. The pressure valve is furnished with a casing that has a valve chamber, a valve body housed within the valve chamber, and a spring. The valve body has a disk-shaped valve part and a side wall that projects with tubular contours from the outside perimeter of the valve part, and has a cup shape defining a spring chamber that is bounded by the valve part and the side wall. The valve part is perforated by an orifice of smaller planar dimensions than the valve aperture.

Abstract: In a fuel cutoff valve 10, a casing 30 including a valve chest 33 is fastened to a cover member 20 thermally welded to an upper tank wall FTa of a fuel tank FT. A float 50 is located in the valve chest 33 of the casing 30. The casing 30 has bottomed recesses 42 formed as concaves in an outer circumferential wall of the valve chest 33, and vent holes 40 provided at respective bottom areas of the bottomed recesses 42. Each of the vent holes 40 is a through hole of a small diameter, which is determined to be sufficient for ventilation of the fuel vapor in the valve chest 33. The vent hole 40 has a short dimension by the depth of the bottomed recess 42.

Abstract: The fuel tank venting device is furnished with a full fuel control valve and a rollover valve that are installed on a fuel tank, and a fuel tank valve unit having a pressure valve that is situated between a canister and the two valves. The pressure valve is furnished with a casing that has a valve chamber, a valve body housed within the valve chamber, and a spring. The valve body has a disk-shaped valve part and a side wall that projects with tubular contours from the outside perimeter of the valve part, and has a cup shape defining a spring chamber that is bounded by the valve part and the side wall. The valve part is perforated by an orifice of smaller planar dimensions than the valve aperture.

Abstract: A fuel cutoff valve is provided with a casing that forms a valve chamber that is connected to a connection conduit, a float mechanism that is housed so as to be able to rise and fall in the valve chamber, and a spring that supports the float mechanism. The float mechanism is structured through an assembly of a first float body and a second float body, where the first float body is provided with a valve portion that opens and closes the connection conduit and provided with a storage chamber that is open on the bottom, where the second float body is housed in the storage chamber to be assembled into the first float body.

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 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: A welding joint 10 for a fuel tank reduces the amount of fuel vapor in the fuel tank that escapes into the atmosphere. The fuel tank welding joint 10 a joint main body 20 and a barrier layer laminated on the surface of the joint main body 20. The joint main body 20 is formed of a first resin material weldable to the wall of the fuel tank FT, and the barrier layer 30 is formed of a second resin material that is adhesively and chemically reactive with the first resin material and that is more fuel-impermeable than the first resin material. An end portion 34 formed so as to be exposed to the outside at the end of a tube portion 24 is formed on the barrier layer 30. When the barrier layer 30 is injection molded on the surface of the joint main body 20, the end portion 34 is formed by the flow of the second resin material through the end of the tube portion 24 to increase the adhesive strength of the end face where the parts are joined.

Abstract: A fuel vent valve is not shut improperly by the flow of fuel vapor. The fuel vent valve also prevents fuel from spilling out from filler neck during filling of a fuel tank. The fuel vent valve includes a casing having a vent space, a float and a vent device which can be moved up and down. The vent device includes an upper valve member, which shuts and opens a communication passage. The upper valve member is located above the float. A breathing hole and an outer wall of the valve device form a restricted passage. When the fuel level reaches a first predetermined level and the valve device rises, the restricted passage increases the flow resistance to restrict the flow of fuel vapor from the communication passage to the outside of the fuel tank. When fuel level reaches a second predetermined level and the valve device rises further, the upper valve member closes the communication passage.

Abstract: A fuel cutoff valve is provided with a casing that forms a valve chamber that is connected to a connection conduit, a float mechanism that is housed so as to be able to rise and fall in the valve chamber, and a spring that supports the float mechanism. The float mechanism is structured through an assembly of a first float body and a second float body, where the first float body is provided with a valve portion that opens and closes the connection conduit and provided with a storage chamber that is open on the bottom, where the second float body is housed in the storage chamber to be assembled into the first float body.

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: The fuel cut off valve comprises a casing, a float that rises and falls with increases and decreases in the buoyant force depending on the fuel liquid level within a valve chamber, and a valve mechanism that opens and closes a connecting passage through the rising or falling of the float, equipped on the upper part of the float. The valve mechanism comprises a supported part, and when the supported part is supported by a support part of the float, the center of gravity is provided below the support portion, so that the supported part is balanced on a single support portion. The fuel cut off valve can provide excellent seal performance when a vehicle is at an angle, and that can be miniaturized.

Abstract: A fuel vent valve is not shut improperly by the flow of fuel vapor. The fuel vent valve also prevents fuel from spilling out from filler neck during filling of a fuel tank. The fuel vent valve includes a casing having a vent space, a float and a vent device which can be moved up and down. The vent device includes an upper valve member, which shuts and opens a communication passage. The upper valve member is located above the float. A breathing hole and an outer wall of the valve device form a restricted passage. When the fuel level reaches a first predetermined level and the valve device rises, the restricted passage increases the flow resistance to restrict the flow of fuel vapor from the communication passage to the outside of the fuel tank. When fuel level reaches a second predetermined level and the valve device rises further, the upper valve member closes the communication passage.

Abstract: Disclosed is a valve being attached to a fuel tank, the valve permitting a vaporized fuel to flow out and inhibiting a liquid fuel from flowing out. The valve includes a cover and a case. For example, the cover is bonded to an upper portion of a fuel tank, is independent of the fuel tank, and includes a connecting surface to be connected to the fuel tank and a flow-out passage in which a vaporized fuel flows out. The connecting surface has a connector portion formed of a resin exhibiting a good bondability to the fuel tank. The case is screwed to the cover, and includes an evaporator opening and a floating valve. The evaporator opening communicates with the flow-out passage. The floating valve opens or closes the evaporator opening.

Abstract: A welding joint 10 for a fuel tank reduces the amount of fuel vapor in the fuel tank that escapes into the atmosphere. The fuel tank welding joint 10 a joint main body 20 and a barrier layer laminated on the surface of the joint main body 20. The joint main body 20 is formed of a first resin material weldable to the wall of the fuel tank FT, and the barrier layer 30 is formed of a second resin material that is adhesively and chemically reactive with the first resin material and that is more fuel-impermeable than the first resin material. An end portion 34 formed so as to be exposed to the outside at the end of a tube portion 24 is formed on the barrier layer 30. When the barrier layer 30 is injection molded on the surface of the joint main body 20, the end portion 34 is formed by the flow of the second resin material through the end of the tube portion 24 to increase the adhesive strength of the end face where the parts are joined.