Method of manufacturing a fuel inlet
DCFirst Claim
1. A method of manufacturing a fuel inlet, the fuel inlet comprising an inlet pipe for conveying fuel into a fuel tank and a breather tube for venting air from the fuel tank toward an end of the inlet pipe when the fuel is filled into the fuel tank, the method comprising the steps of:
- providing a first stainless pipe for manufacturing the inlet pipe and a second stainless pipe for forming the breather tube;
expanding an end portion of the inlet pipe to form a filling part having a larger diameter than a remainder of the inlet pipe;
forming a helical groove on a peripheral wall of the filling part to produce a screw-thread in the filling part;
welding the breather tube to the inlet pipe; and
applying a cationic electrodeposition coating to the fuel inlet.
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Accused Products
Abstract
A method of manufacturing a fuel inlet having an improved anti-rust property. As material for an inlet pipe 2 and a breather tube 4, stainless pipes are used. A pipe expanding process in which an end portion of the inlet pipe 2 is enlarged in diameter to form a filling part 6, a screw-thread forming process in which a helical groove 12 is formed on a periphery of the filling part 6, a welding process in which the breather tube 4 is welded to the inlet pipe 2, and a coating process in which a cationic electrodeposition coating is applied to a fuel inlet 1 after the welding process are performed in turn, thereby obtaining the fuel inlet 1 having an improved anti-rust property.
14 Citations
19 Claims
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1. A method of manufacturing a fuel inlet, the fuel inlet comprising an inlet pipe for conveying fuel into a fuel tank and a breather tube for venting air from the fuel tank toward an end of the inlet pipe when the fuel is filled into the fuel tank, the method comprising the steps of:
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providing a first stainless pipe for manufacturing the inlet pipe and a second stainless pipe for forming the breather tube;
expanding an end portion of the inlet pipe to form a filling part having a larger diameter than a remainder of the inlet pipe;
forming a helical groove on a peripheral wall of the filling part to produce a screw-thread in the filling part;
welding the breather tube to the inlet pipe; and
applying a cationic electrodeposition coating to the fuel inlet. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of manufacturing a fuel inlet, the fuel inlet comprising an inlet pipe for conveying fuel into a fuel tank and a breather tube for venting air from the fuel tank toward an end of the inlet pipe when the fuel is filled into the fuel tank, the method comprising the steps of:
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providing a first stainless pipe for manufacturing the inlet pipe and a second stainless pipe for forming the breather tube;
expanding an open end of the inlet pipe to form a filling part having a larger diameter than a remainder of the inlet pipe and forming the larger diameter of the filling part offset from a diameter of the remainder of the pipe;
flaring an edge of the filling part to fold back the open end of the filling part of the fuel inlet;
forming a helical groove on an outer surface of a peripheral wall of the filling part to produce a screw-thread on an inner surface of the peripheral wall of the filling part;
welding the breather tube to the inlet pipe; and
applying a cationic electrodeposition coating to the fuel inlet. - View Dependent Claims (15, 16, 17, 18)
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19. A method of manufacturing a fuel inlet, the fuel inlet comprising an inlet pipe for conveying fuel into a fuel tank and a breather tube for venting air from the fuel tank toward an end of the inlet pipe when the fuel is filled into the fuel tank, the method comprising the steps of:
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providing a first stainless pipe for manufacturing the inlet pipe and a second stainless pipe for forming the breather tube;
expanding an open end of the inlet pipe to form a filling part having a larger diameter than a remainder of the inlet pipe and forming the larger diameter of the filling part offset from a diameter of the remainder of the pipe;
flaring an edge of the filling part to fold back the open end of the filling part of the fuel inlet;
forming a helical groove on an outer surface of the peripheral wall of the filling part to produce a screw-thread on an inner surface of the peripheral wall of the filling part by inserting a core bar on which a groove is formed into the filling part, and a rough and a fine roller are sequentially pressed against the outer surface of the peripheral wall and follow along the groove of the core bar thereby forming the helical groove in the peripheral wall of the filling part, welding the breather tube to the inlet pipe; and
applying a cationic electrodeposition coating to the fuel inlet.
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Specification