Fuel inlet and manufacturing method thereof

A fuel inlet for connection to a fuel tank and forming a liquid seal when supplying fuel to the fuel tank, the fuel inlet comprising:

• an inlet pipe for supplying fuel into a fuel tank;
• a cylindrical reinforcement located within and overlapping an inner circumference of the inlet pipe in a vicinity of a fuel port thereof;
• a spiral groove formed in both the inlet pipe and the cylindrical reinforcement for engagement with a removable fuel cap having a mating spiral arrangement;
• an intermediate portion of the inlet pipe having an attachment portion with a breather hole provided therein, and the intermediate portion forming a constriction in the fuel inlet;
• and
• a breather tube having a first end with a flange which is projection welded to the attachment portion of the inlet pipe, around the breather hole, to facilitate communication between the breather tube and the inlet pipe, and a second end of the breather tube being connectable with the fuel tank for allowing air to flow from the fuel tank toward the intermediate portion of the inlet pipe as fuel is supplied to the fuel tank via the inlet pipe.

A fuel inlet forced into a fuel inlet supporting hole provided in a vehicle body so as to be fixedly secured therein to allow with relative movement between the fuel inlet and the car body, the fuel inlet comprising:

• a first end of the fuel inlet defining an opening for receiving a fuel nozzle and a second end of the fuel inlet being connectable with a fuel tank;
• an extending portion extending radially outward from an edge of the first end of the inlet pipe;
• and
• an outer-cylinder-like flange formed integral with the extending portion and the outer-cylinder-like flange extending in an axial direction away from the first end toward the second end of the inlet pipe to surround a portion of first end of the fuel inlet;
• and
• the outer-cylinder-like flange being force fixed to the fuel inlet supporting hole to be fixedly secured thereto.

A fuel inlet supported by a vehicle body, the fuel inlet forming a liquid seal when supplying fuel to a fuel tank, the fuel inlet comprising:

• a first end of the fuel inlet defining an opening for receiving a fuel nozzle and a second end of the fuel inlet being connectable with a fuel tank, and an inlet pipe being manufactured from a metallic material selected from the group comprising SUS304, SUS304L and SUS436 according to a Japanese Industrial Standards;
• a first end of the inlet pipe being expanded to have a diameter of one and a half to three times as large as a diameter of a body of the inlet pipe;
• an extending portion extending radially outward from an edge of the first end of the inlet pipe;
• an outer-cylinder-like flange formed integral with the extending portion and the outer-cylinder-like flange extending in an axial direction away from the first end toward the second end of the inlet pipe to surround a portion of first end of the fuel inlet;
• a cylindrical reinforcement located within and overlapping an inner circumference of the inlet pipe in a vicinity of a fuel port thereof;
• an intermediate portion of the inlet pipe has an attachment portion with a breather hole provided therein, and the intermediate portion forms a constriction in the fuel inlet;
• a breather tube having a first end with a flange which is projection welded to the attachment portion of the inlet pipe, around the breather hole, to facilitate communication between the breather tube and the inlet pipe and a second end of the breather tube being connectable with the fuel tank for allowing air to flow from the fuel tank toward the intermediate portion of the inlet pipe as fuel is supplied to the fuel tank via the inlet pipe;
• a spiral groove formed in the first end of the fuel inlet and the cylindrical reinforcement and the spiral groove facilitating engagement with a removable fuel cap having a mating spiral arrangement;
• and
• the outer-cylinder-like flange being force fixed to a fuel inlet supporting hole formed in the vehicle body to be fixedly secured thereto.

A fuel inlet for connection to a fuel tank and forming a liquid seal when supplying fuel to the fuel tank the fuel inlet comprising:

• a relatively large diameter portion formed on a fuel port side of the fuel inlet;
• and
• a relatively small diameter portion on aside of the fuel inlet communicating with the fuel tank, and the relatively small diameter portion being formed integrally with the relatively large diameter portion;
• and
• the relatively small diameter portion having a diameter smaller than the relatively large diameter portion, and the relatively small diameter portion including a plurality of elongate protrusions formed by crimping the fuel inlet inwardly.