Patent ID: 6708730
Filing Date: 2004-03-23
Classification: B23K,F16L,F28F

Abstract:
A structure comprising:a first tubular body, the first tubular body having a surface with a hole; a second tubular body, the second tubular body having an end portion inserted in the hole of the first tubular body; a flange arranged at the end portion of the second tubular body, the flange including a flat portion abutting on the surface of the first tubular body; recesses formed with the hole of the first tubular body, the recesses facing each other, the recesses being arranged on a line inclined with respect to a longitudinal direction of the first tubular body, wherein a diameter of the hole extending along the recesses is smaller than that of the flange; and protrusions arranged at a head of the end portion of the second tubular body, wherein a spacing between each protrusion and the flange is substantially equal to a thickness of the surface of the first tubular body, wherein the protrusions are arranged inside the first tubular body through the recesses, each of the protrusions including a face opposite to the flange, the face including an inclined face inclined outward to increase the spacing.