Metallic cylindrical member and metallic bracket
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United States of America Patent
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-
Dec 21, 2004
Grant Date -
May 13, 2004
app pub date -
Nov 8, 2002
filing date -
Nov 8, 2002
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Disclosed is a metallic cylindrical member and a metallic bracket that can prevent a change in inside diameter of the metallic cylindrical member which is induced with an external force applied on cooling of the welded portion. When forming the bracket by engaging projections and recesses with each other, which projections and recesses are formed at left and right sides A, B of a metallic plate, portions P through S which span adjacent projections are crushed stripewise in the wall thickness direction to form indentations, thereby supplying metal which is forced out of the indentations P through S to around each of the projections to enhance the adhesion between adjacent projections and realize a strong joining of both left and right sides of the metallic plate.
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