Abstract: A fuel cutoff valve comprises a casing having a primary valve chamber and a secondary valve chamber, a primary valve mechanism housed in the primary valve chamber, and a secondary valve mechanism housed in the secondary valve chamber. The casing has a first communication path that connects the inside of the fuel tank and the primary valve chamber, and a second communication path that connects the primary valve chamber and the secondary valve chamber, due to the differential pressure between the tank internal pressure and the primary valve chamber, by the fuel in the fuel tank flowing into the primary valve chamber through the first communication path, a connection conduit is closed by the primary valve mechanism. When the fuel level inside the fuel tank reaches a second fuel level, the second communication path is closed by the rising of the secondary valve mechanism.

Abstract: A fuel cutoff valve comprises a casing having a primary valve chamber and a secondary valve chamber, a primary valve mechanism housed in the primary valve chamber, and a secondary valve mechanism housed in the secondary valve chamber. The casing has a first communication path that connects the inside of the fuel tank and the primary valve chamber, and a second communication path that connects the primary valve chamber and the secondary valve chamber, due to the differential pressure between the tank internal pressure and the primary valve chamber, by the fuel in the fuel tank flowing into the primary valve chamber through the first communication path, a connection conduit is closed by the primary valve mechanism. When the fuel level inside the fuel tank reaches a second fuel level, the second communication path is closed by the rising of the secondary valve mechanism.

Abstract: A fuel tank valve device equipped with a casing, and a valve mechanism. The valve mechanism has a first valve unit having a first valve connecting hole, and a second valve unit that opens and closes the first valve connecting hole. The first valve unit completely closes the valve flow path by moving by the force in the valve closing direction when the pressure of the second communication path exceeds a preset first pressure value. In a state when the first valve unit is closing the valve flow path, when the pressure of the second communication path exceeds a preset second pressure value that is greater than the first pressure value, the second valve unit receives the pressure from the first valve connecting hole and moves to open the first valve connecting hole, communicating with the valve flow path.

Abstract: The fuel tank unit includes a fuel cutoff valve fastened to a support body. The support body and the casing of the fuel cutoff valve are made of first and second resin materials having different rates of fuel swelling. The fuel cutoff valve is fastened to the support body via a fastening mechanism. The fastening mechanism entails engaging a first support engaging portion and a second support engaging portion of the support body in first and second fastening engaging portions composed of hooks formed on the casing of the fuel cutoff valve, at first and second hook engagement levels that represent the bite of the hooks. The engaging portions are designed such that prior to fuel swelling of the support body and the base cover first hook engagement exceeds second hook engagement, whereas subsequent to fuel swelling second hook engagement exceeds first hook engagement.

Abstract: A fuel shutoff valve includes a valve chamber, a casing, a float, and a shock absorber. The casing includes a body, a cylinder, and a seal. The float is accommodated in the valve chamber. The shock absorber includes a seat attaching to and detaching from the seal of the casing. The shock absorber includes a first arm, a second arm, a contact, and a locker. The first arm protrudes outward from the seat of the shock absorber diametrically, and exhibits elasticity. The second arm exhibits elasticity. The contact is disposed at the leading end of the second arm, and comes in contact with the float. The locker is disposed at a diametrically-outer-side leading end of the first arm, and locks to the body of the casing when the shock absorber is positioned at the lowermost level in the valve chamber.

Abstract: A fuel tank valve device equipped with a casing, and a valve mechanism. The valve mechanism has a first valve unit having a first valve connecting hole, and a second valve unit that opens and closes the first valve connecting hole. The first valve unit completely closes the valve flow path by moving by the force in the valve closing direction when the pressure of the second communication path exceeds a preset first pressure value. In a state when the first valve unit is closing the valve flow path, when the pressure of the second communication path exceeds a preset second pressure value that is greater than the first pressure value, the second valve unit receives the pressure from the first valve connecting hole and moves to open the first valve connecting hole, communicating with the valve flow path.

Abstract: The fuel tank unit includes a fuel cutoff valve fastened to a support body. The support body and the casing of the fuel cutoff valve are made of first and second resin materials having different rates of fuel swelling. The fuel cutoff valve is fastened to the support body via a fastening mechanism. The fastening mechanism entails engaging a first support engaging portion and a second support engaging portion of the support body in first and second fastening engaging portions composed of hooks formed on the casing of the fuel cutoff valve, at first and second hook engagement levels that represent the bite of the hooks. The engaging portions are designed such that prior to fuel swelling of the support body and the base cover first hook engagement exceeds second hook engagement, whereas subsequent to fuel swelling second hook engagement exceeds first hook engagement.

Abstract: The fuel cutoff valve has a casing that defines a casing body having a valve chamber and a communicating chamber that connects the valve chamber to the outside; and a float mechanism that is housed within the valve chamber and adapted to open and close a connecting passage through rise and fall in accordance with the fuel level inside the fuel tank. The casing has projecting out respectively from its side part a first pipe that connects to the communicating chamber as well as connecting to the outside via a tube, and a second pipe that connects the communicating chamber to another valve via a tube. The first pipe and the second pipe are situated in a mutually parallel arrangement in the vertical direction.

Abstract: A fuel shutoff valve includes a valve chamber, a casing, a float, and a shock absorber. The casing includes a body, a cylinder, and a seal. The float is accommodated in the valve chamber. The shock absorber includes a seat attaching to and detaching from the seal of the casing. The shock absorber includes a first arm, a second arm, a contact, and a locker. The first arm protrudes outward from the seat of the shock absorber diametrically, and exhibits elasticity. The second arm exhibits elasticity. The contact is disposed at the leading end of the second arm, and comes in contact with the float. The locker is disposed at a diametrically-outer-side leading end of the first arm, and locks to the body of the casing when the shock absorber is positioned at the lowermost level in the valve chamber.

Abstract: The fuel tank ventilating device includes a fuel cutoff device, and a connector pipe connecting the fuel cutoff device with a canister. The fuel cutoff device includes a first fuel cutoff valve, a second fuel cutoff valve, and a positive pressure valve; the first flow pipe and the second flow pipe are connected to a third flow pipe by a connecting part, and are connected to the canister. With the first fuel cutoff valve in a first submersion state, fuel that has collected in the first flow pipe will be returned to the fuel tank on the basis of a differential pressure between tank internal pressure and the pipe internal pressure bearing on the fuel inside the first flow pipe. With the first fuel cutoff valve in a submersion state, fuel that has leaked into the second flow pipe will not reach the connecting part.

Abstract: The fuel cutoff valve includes a casing and a float mechanism. The float mechanism is composed of an outside float and an inside float. The outside float includes an outside float body of round tubular shape having a float chamber that connects with a valve chamber via a through-hole formed in its upper part; and an outside valve portion disposed on the upper part of the outside float body and adapted to open and close an outside connecting passage. The inside float has an inside float body accommodated and adapted to rise and fall within the float chamber, and an inside valve portion disposed on the upper part of the inside float body and adapted to open and close the inside connecting passage through the through-hole.

Abstract: The fuel cutoff valve has a first valve mechanism inside a first valve chamber of a casing. In the first valve mechanism, a seat member installs on the upper part of a first float. The seat member has a seat portion which seats in a first seal part facing a first connection conduit; and a valve support portion projected from the lower face of the seat portion in the direction of up and down movement of the first float. The valve support portion is formed so as to be in contact against the upper end of a bottom support portion of a lower cover when the first float is in the down position. With a simple configuration, the fuel cutoff valve affords reduction of impact noise associated with vibration of the float.

Abstract: The manufacturing method of the invention manufactures a fuel filler pipe (branching pipe), where a breather pipe is branched off from a filler pipe main body. The manufacturing method extrudes a first extruded tubular member and a second extruded tubular member, conveys molds arranged on both sides of the first extruded tubular member and the second extruded tubular member, and forms the first extruded tubular member and the second extruded tubular member corresponding to molding surfaces of the molds, so as to mold the filler pipe main body and the breather pipe. The manufacturing method then thermally welds part of the second extruded tubular member with an outer wall of the first extruded tubular member and closes an opening end of the breather pipe to form a welding joint portion. A connection hole for connecting the conduit of the filler pipe main body with the conduit of the breather pipe is formed in the welding joint portion with a tool inserted through an opening of the filler pipe main body.

Abstract: A filler device or pipe comprising: a filler neck including a pouring inlet, a neck connection portion, and a connection pipe which includes a bellows part and which is connected to the neck connection portion. Fuel is injected through the pouring inlet and fed into the fuel tank through a filling passage of the filler device. The filler device further includes an inner tube including a tube body formed of a flexible elastomer material, which is inserted into the connection pipe. The tube body and the connection pipe having cooperating engaging members for holding the tube body within the connection pipe. The tube body covers an inner wall of the bellows part.

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 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 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 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 fuel tube having an ethylene-vinyl alcohol copolymer (EVOH) layer formed of an EVOH-based extruded EVOH material, and a modified MHDPE layer formed of an extruded MHDPE material which is based on modified medium high density polyethylene (modified MHDPE) or is based on a polymer alloy containing mainly modified MHDPE. The modified MHDPE is a dicarboxylic acid-modified material having a melt mass flow rate value (190° C.: JIS K 7210) of about 0.01 to 0.9 g/10min. The interlayer adherability between the EVOH layer 14 and the modified MHDPE layer 16 is maintained while maintaining the anti-fuel permeability and the flexibility of the fuel tube 12.

Abstract: A fuel supply apparatus includes an inlet box, and a filler neck. The inlet box is dented in a vehicle panel, and has a bottom wall, a neck-penetrating opening pierced through the bottom wall, a box-side axial engagement portion and a box-side radial engagement portion. The filler neck is disposed to penetrate through the neck-penetrating opening into the inlet box, and has an outer peripheral surface provided with a flange. The flange has a flange-side axial engagement portion engaging with the box-side axial engagement portion to regulate axial movements of the filler neck, and a flange-side radial engagement portion engaging with the box-side radial engagement portion to regulate radial movements of the filler neck. The fuel supply apparatus can be assembled with ease, and can be manufactured at reduced cost.