Pipes and tubular conduits – Combined – With end structure
Reexamination Certificate
2005-01-18
2005-01-18
Hook, James (Department: 3752)
Pipes and tubular conduits
Combined
With end structure
C123S468000, C072S370110, C285S386000
Reexamination Certificate
active
06843275
ABSTRACT:
A high-pressure fuel injection pipe has a connecting head portion increased in diameter by buckling molding at the end of a thick and small-diameter metallic pipe. An under-head portion of the connecting head is formed with a thick wall portion that satisfies conditions of: a radius of curvature R1of a portion A of the thick wall portion continuing to the connecting head is 0.03 to 0.15 times the outer diameter of the pipe; a radius of curvature R2of a portion B continuing from the portion A of the thick wall portion to a straight pipe portion is 0.3 to 1.5 times the outer diameter of the pipe; and a maximum diametrical size w of the thick wall portion is 0.25 to 0.4 times a maximum diametrical projecting length W of the connecting head.
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Casella Anthony J.
Hespos Gerald E.
Hook James
Usui Kokusai Sangyo Kaisha Limited
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