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 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: 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 cutoff valve has a casing main body, a first float having a smaller specific gravity than a fuel, a second float having a greater specific gravity than the fuel, and a spring. The first float has a float main body and a buoyancy body of a foamed resin. The first float's specific gravity therefore is smaller than the fuel's specific gravity. The first float rises by buoyancy to close a first connection conduit, when a liquid level in a fuel tank exceeds a first liquid level. The second float rises by buoyancy and pressing of the spring to close a second connection conduit, when the liquid level exceeds a second liquid level, higher than the first liquid level. The second float lowers to open the second connection conduit, when the liquid level becomes lower than the second liquid level but is still higher than the first liquid level.

Abstract: In the fuel tank, a tank wall providing a tank chamber is formed by blow molding. A tank partition is disposed in the tank chamber. The tank partition is positioned in a direction substantially perpendicular to a longitudinal direction of the tank wall, and is clamped between the opposite inner surfaces of the tank wall. A functional component is attached to the tank partition.

Abstract: A flow control valve includes a housing, a valve element, a valve-element urger, a first valve, and a second valve. The first valve closes the communication between inlet and outlet openings of the housing gradually when the valve-element urger moves the valve element away from the inlet opening. The second valve opens the communication between the inlet and outlet openings when the valve-element urger moves the valve element away from the inlet opening. The first valve is opened, and the second valve is closed when a differential pressure between a pressure of the fluid on an inlet-opening side and a pressure of the fluid on an outlet-opening side is a predetermined value or less. The second valve opens the communication between the inlet and outlet openings instantaneously when the differential pressure is more than a predetermined value.

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 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 fuel cutoff valve of the invention has a casing main body, a first float having a smaller specific gravity than that of a fuel, a second float having a greater specific gravity than that of the fuel, and a spring. The first float has a float main body and a buoyancy body of a foamed resin. The buoyancy body makes the resulting specific gravity of the first float smaller than the specific gravity of the fuel. The first float moves up by means of buoyancy to close a first connection conduit, when a liquid level in a fuel tank exceeds a first present liquid level. The second float moves up by means of buoyancy and a pressing force of the spring to close a second connection conduit, when the liquid level in the fuel tank exceeds a preset second liquid level, which is higher than the preset first liquid level. The second float moves down to open the second connection conduit, when the liquid level becomes lower than the preset second liquid level but is still higher than the preset first liquid level.

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 cutoff valve comprises a casing, a cover having a cover supporting part for supporting an upper part of the casing, an O-ring disposed on an outer periphery of the casing, and a seal holding member. The seal holding part is constituted by a member made of a material having a high degree of shape stability, such as a polyamide, into which glass fibers are added. Further, the seal holding part is thermally welded to a welding end of a cover inner layer made of a modified polyamide.

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: 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 fuel cutoff valve includes a full fuel control valve and an overfill prevention valve inside a casing. The overfill prevention valve is equipped with first and second floats. The second float is disposed in the storage chamber inside the first float of the full fuel control valve while being allowed to move up and down. The second float is configured such that a second connection conduit is closed by a second valve element as a result of a rising movement when the fuel level exceeds a second liquid level located above a first liquid level, and the second valve element is connected to a first connection conduit through a second connection conduit to reduce the force with which the first valve element of the first float is pressed against a first seat as a result of the fact that the fuel level has dropped below the second liquid level but is still above the first liquid level.

Abstract: A fuel cutoff valve comprises a casing, a cover having a cover supporting part for supporting an upper part of the casing, an O-ring disposed on an outer periphery of the casing, and a seal holding member. The seal holding part is constituted by a member made of a material having a high degree of shape stability, such as a polyamide, into which glass fibers are added. Further, the seal holding part is thermally welded to a welding end of a cover inner layer made of a modified polyamide.

Abstract: A pair of edge polishing members (13a, 13b) each having a recess arcked working surface (22) are located on both sides of a diameter direction of a circular plate-shaped work (1) which is held by a chuck means (12) and is rotatable therewith, with the axes of the respective polishing members being inclined with respect to the axis (L) of the work (1), in a manner such that the working surface (22) of one edge polishing member (13a) gets in contact with the edge portion (2a) on the front side of the work (1), while the working surface (22) of the other edge polishing member (13b) gets in contact with the edge portion (2b) on the back side of the work (1), thereby polishing the two edge portions (2a, 2b).

Abstract: A pair of edge polishing members (13a, 13b) each having a recess arcked working surface (22) are located on both sides of a diameter direction of a circular plate-shaped work (1) which is held by a chuck means (12) and is rotatable therewith, with the axes of the respective polishing members being inclined with respect to the axis (L) of the work (1), in a manner such that the working surface (22) of one edge polishing member (13a) gets in contact with the edge portion (2a) on the front side of the work (1), while the working surface (22) of the other edge polishing member (13b) gets in contact with the edge portion (2b) on the back side of the work (1), thereby polishing the two edge portions (2a, 2b).

Abstract: In the fuel tank, a tank wall providing a tank chamber is formed by blow molding. A tank partition is disposed in the tank chamber. The tank partition is positioned in a direction substantially perpendicular to a longitudinal direction of the tank wall, and is clamped between the opposite inner surfaces of the tank wall. A functional component is attached to the tank partition.

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: 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.